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Molecular Mechanisms of Plant Abiotic Stress Tolerance

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 12221

Special Issue Editor


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Guest Editor
Department of Botany, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: plant ecophysiology; biotic stress; abiotic stress; photosynthesis; antioxidative mechanisms; photoprotective mechanisms; mineral nutrition; ROS
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Special Issue Information

Dear Colleagues,

During their life cycle, plants are continuously exposed to various abiotic stress factors that negatively influence plant growth and development and crop productivity. However, plants have developed several dynamic approaches at the morphological, physiological, and biochemical levels, permitting them to avoid and/or tolerate abiotic stresses. Avoidance mechanisms are mainly morphological and physiological adjustments that provide an escape of the abiotic stress factor. In the case of drought stress, these adjustments involve an increased root system, increased leaf thickness, decreased leaf area, reduced stomatal number and conductance, and leaf rolling or folding to minimize evapotranspiration. Drought tolerance traits are correlated with the maintenance of the plant water status throughout osmotic adjustment by the accumulation of osmolytes that help the plants to preserve their water status, as well as to acclimate to water deficit. The impact of abiotic stress factors on plants depends on the intensity, frequency, and duration of the stress, as well as on the plant species.

Despite the various studies which have aimed to elucidate the mechanisms of plant tolerance to abiotic stress factors, the exact molecular mechanisms are not yet fully understood. Therefore, in order evaluate the main reasons of crop yield reduction and food production worldwide, we need to illuminate the molecular mechanisms of plant abiotic stress tolerance to various stresses, such as drought, temperature, salinity, nutrient deficiency, light intensity, heavy metals, UV radiation, etc., as well as their influence on the growth, physiology, biochemistry, and photosynthesis of the plant species.

This Special Issue of IJMS will highlight the molecular mechanisms of plant tolerance to abiotic stresses and thus contribute to a better understanding of plant responses to stress factors that can help in the development of realistic interventions for increasing agricultural productivity.

Scientists from all over the world are invited to submit original research and review articles on all aspects of plant physiology and development, from growth, water relations, nutrition, photosynthesis, and related plant physiological processes to changes in metabolism using all omic techniques (ionomics, metabolomics, transcriptomics, proteomics, genomics, etc.).

Prof. Dr. Michael Moustakas
Guest Editor

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • acclimation
  • drought
  • salinity
  • pesticides
  • high–low temperature
  • high–low light intensity
  • nutrient deficiencies
  • heavy metals
  • UV radiation
  • photosynthetic efficiency
  • ROS
  • antioxidant mechanisms
  • redox regulation

Published Papers (11 papers)

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Research

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16 pages, 13081 KiB  
Article
A Genome-Wide Analysis of the CEP Gene Family in Cotton and a Functional Study of GhCEP46-D05 in Plant Development
by Zhenyu Mei, Bei Li, Shouhong Zhu, Yan Li, Jinbo Yao, Jingwen Pan, Yongshan Zhang and Wei Chen
Int. J. Mol. Sci. 2024, 25(8), 4231; https://doi.org/10.3390/ijms25084231 - 11 Apr 2024
Viewed by 333
Abstract
C-TERMINALLY ENCODED PEPTIDEs (CEPs) are a class of peptide hormones that have been shown in previous studies to play an important role in regulating the development and response to abiotic stress in model plants. However, their role in cotton is not [...] Read more.
C-TERMINALLY ENCODED PEPTIDEs (CEPs) are a class of peptide hormones that have been shown in previous studies to play an important role in regulating the development and response to abiotic stress in model plants. However, their role in cotton is not well understood. In this study, we identified 54, 59, 34, and 35 CEP genes from Gossypium hirsutum (2n = 4x = 52, AD1), G. barbadense (AD2), G. arboreum (2n = 2X = 26, A2), and G. raimondii (2n = 2X = 26, D5), respectively. Sequence alignment and phylogenetic analyses indicate that cotton CEP proteins can be categorized into two subgroups based on the differentiation of their CEP domain. Chromosomal distribution and collinearity analyses show that most of the cotton CEP genes are situated in gene clusters, suggesting that segmental duplication may be a critical factor in CEP gene expansion. Expression pattern analyses showed that cotton CEP genes are widely expressed throughout the plant, with some genes exhibiting specific expression patterns. Ectopic expression of GhCEP46-D05 in Arabidopsis led to a significant reduction in both root length and seed size, resulting in a dwarf phenotype. Similarly, overexpression of GhCEP46-D05 in cotton resulted in reduced internode length and plant height. These findings provide a foundation for further investigation into the function of cotton CEP genes and their potential role in cotton breeding. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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28 pages, 5835 KiB  
Article
Comparative Physiological and Transcriptome Analyses of Tolerant and Susceptible Cultivars Reveal the Molecular Mechanism of Cold Tolerance in Anthurium andraeanum
by Na Dou, Li Li, Yifu Fang, Shoujin Fan and Chunxia Wu
Int. J. Mol. Sci. 2024, 25(1), 250; https://doi.org/10.3390/ijms25010250 - 23 Dec 2023
Cited by 1 | Viewed by 978
Abstract
Anthurium andraeanum is a tropical ornamental flower. The cost of Anthurium production is higher under low temperature (non-freezing) conditions; therefore, it is important to increase its cold tolerance. However, the molecular mechanisms underlying the response of Anthurium to cold stress remain elusive. In [...] Read more.
Anthurium andraeanum is a tropical ornamental flower. The cost of Anthurium production is higher under low temperature (non-freezing) conditions; therefore, it is important to increase its cold tolerance. However, the molecular mechanisms underlying the response of Anthurium to cold stress remain elusive. In this study, comparative physiological and transcriptome sequencing analyses of two cultivars with contrasting cold tolerances were conducted to evaluate the cold stress response at the flowering stage. The activities of superoxide dismutase and peroxidase and the contents of proline, soluble sugar, and malondialdehyde increased under cold stress in the leaves of the cold tolerant cultivar Elegang (E) and cold susceptible cultivar Menghuang (MH), while the soluble protein content decreased in MH and increased in E. Using RNA sequencing, 24,695 differentially expressed genes (DEGs) were identified from comparisons between cultivars under the same conditions or between the treatment and control groups of a single cultivar, 9132 of which were common cold-responsive DEGs. Heat-shock proteins and pectinesterases were upregulated in E and downregulated in MH, indicating that these proteins are essential for Anthurium cold tolerance. Furthermore, four modules related to cold treatment were obtained by weighted gene co-expression network analysis. The expression of the top 20 hub genes in these modules was induced by cold stress in E or MH, suggesting they might be crucial contributors to cold tolerance. DEGs were significantly enriched in plant hormone signal transduction pathways, trehalose metabolism, and ribosomal proteins, suggesting these processes play important roles in Anthurium’s cold stress response. This study provides a basis for elucidating the mechanism of cold tolerance in A. andraeanum and potential targets for molecular breeding. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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29 pages, 6164 KiB  
Article
The Genetic Dissection of Nitrogen Use-Related Traits in Flax (Linum usitatissimum L.) at the Seedling Stage through the Integration of Multi-Locus GWAS, RNA-seq and Genomic Selection
by Braulio J. Soto-Cerda, Giovanni Larama, Sylvie Cloutier, Bourlaye Fofana, Claudio Inostroza-Blancheteau and Gabriela Aravena
Int. J. Mol. Sci. 2023, 24(24), 17624; https://doi.org/10.3390/ijms242417624 - 18 Dec 2023
Viewed by 810
Abstract
Nitrogen (N), the most important macro-nutrient for plant growth and development, is a key factor that determines crop yield. Yet its excessive applications pollute the environment and are expensive. Hence, studying nitrogen use efficiency (NUE) in crops is fundamental for sustainable agriculture. Here, [...] Read more.
Nitrogen (N), the most important macro-nutrient for plant growth and development, is a key factor that determines crop yield. Yet its excessive applications pollute the environment and are expensive. Hence, studying nitrogen use efficiency (NUE) in crops is fundamental for sustainable agriculture. Here, an association panel consisting of 123 flax accessions was evaluated for 21 NUE-related traits at the seedling stage under optimum N (N+) and N deficiency (N−) treatments to dissect the genetic architecture of NUE-related traits using a multi-omics approach integrating genome-wide association studies (GWAS), transcriptome analysis and genomic selection (GS). Root traits exhibited significant and positive correlations with NUE under N− conditions (r = 0.33 to 0.43, p < 0.05). A total of 359 QTLs were identified, accounting for 0.11% to 23.1% of the phenotypic variation in NUE-related traits. Transcriptomic analysis identified 1034 differentially expressed genes (DEGs) under contrasting N conditions. DEGs involved in N metabolism, root development, amino acid transport and catabolism and others, were found near the QTLs. GS models to predict NUE stress tolerance index (NUE_STI) trait were tested using a random genome-wide SNP dataset and a GWAS-derived QTLs dataset. The latter produced superior prediction accuracy (r = 0.62 to 0.79) compared to the genome-wide SNP marker dataset (r = 0.11) for NUE_STI. Our results provide insights into the QTL architecture of NUE-related traits, identify candidate genes for further studies, and propose genomic breeding tools to achieve superior NUE in flax under low N input. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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23 pages, 6765 KiB  
Article
Genome-Wide Analysis of the Universal Stress Protein Gene Family in Blueberry and Their Transcriptional Responses to UV-B Irradiation and Abscisic Acid
by Yan Song, Bin Ma, Xinghua Feng, Qingxun Guo, Lianxia Zhou, Xinsheng Zhang and Chunyu Zhang
Int. J. Mol. Sci. 2023, 24(23), 16819; https://doi.org/10.3390/ijms242316819 - 27 Nov 2023
Viewed by 723
Abstract
Universal stress proteins (USPs) play essential roles in plant development, hormonal regulation, and abiotic stress responses. However, the characteristics and functional divergence of USP family members have not been studied in blueberry (Vaccinium corymbosum). In this study, we identified 72 VcUSP [...] Read more.
Universal stress proteins (USPs) play essential roles in plant development, hormonal regulation, and abiotic stress responses. However, the characteristics and functional divergence of USP family members have not been studied in blueberry (Vaccinium corymbosum). In this study, we identified 72 VcUSP genes from the Genome Database for Vaccinium. These VcUSPs could be divided into five groups based on their phylogenetic relationships. VcUSPs from groups Ⅰ, Ⅳ, and Ⅴ each possess one UspA domain; group Ⅰ proteins also contain an ATP-binding site that is not present in group Ⅳ and Ⅴ proteins. Groups Ⅱ and Ⅲ include more complex proteins possessing one to three UspA domains and UspE or UspF domains. Prediction of cis-regulatory elements in the upstream sequences of VcUSP genes indicated that their protein products are likely involved in phytohormone signaling pathways and abiotic stress responses. Analysis of RNA deep sequencing data showed that 21 and 7 VcUSP genes were differentially expressed in response to UV-B radiation and exogenous abscisic acid (ABA) treatments, respectively. VcUSP41 and VcUSP68 expressions responded to both treatments, and their encoded proteins may integrate the UV-B and ABA signaling pathways. Weighted gene co-expression network analysis revealed that VcUSP22, VcUSP26, VcUSP67, VcUSP68, and VcUSP41 were co-expressed with many transcription factor genes, most of which encode members of the MYB, WRKY, zinc finger, bHLH, and AP2 families, and may be involved in plant hormone signal transduction, circadian rhythms, the MAPK signaling pathway, and UV-B-induced flavonoid biosynthesis under UV-B and exogenous ABA treatments. Our study provides a useful reference for the further functional analysis of VcUSP genes and blueberry molecular breeding. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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18 pages, 15482 KiB  
Article
Genome-Wide and Transcriptome Analysis of Jacalin-Related Lectin Genes in Barley and the Functional Characterization of HvHorcH in Low-Nitrogen Tolerance in Arabidopsis
by Xiaoyan Quan, Chen Meng, Chunjuan Xie, Huifang Sun, Boyang Xu, Ramon Santos Bermudez and Wenxing He
Int. J. Mol. Sci. 2023, 24(23), 16641; https://doi.org/10.3390/ijms242316641 - 23 Nov 2023
Viewed by 657
Abstract
The jacalin-related lectins (JRLs) are widely distributed in plants and are involved in plant development and multiple stress responses. However, the characteristics of the HvJRL gene family at the genome-wide level and the roles of JRLs in barley’s response to low-nitrogen (LN) stress [...] Read more.
The jacalin-related lectins (JRLs) are widely distributed in plants and are involved in plant development and multiple stress responses. However, the characteristics of the HvJRL gene family at the genome-wide level and the roles of JRLs in barley’s response to low-nitrogen (LN) stress have been rarely reported. In this study, 32 HvJRL genes were identified and unevenly distributed at both ends of the seven chromosomes in barley. HvJRL proteins generally exhibited low sequence similarity but shared conserved jacalin domains by multiple sequence analysis. These proteins were classified into seven subfamilies based on phylogenetic analysis, with a similar gene structure and conserved motifs in the same subfamily. The HvJRL promoters contained a large number of diverse cis-elements associated with hormonal response and stress regulation. Based on the phylogenetic relationships and functionally known JRL homologs, it was predicted that some HvJRLs have the potential to serve functions in multiple stress responses but not nutrition deficiency stress. Subsequently, nine differentially expressed genes (DEGs) encoding eight HvJRL proteins were identified in two barley genotypes with different LN tolerance by transcriptome analysis. Furthermore, 35S:HvHorcH transgenic Arabidopsis seedlings did enhance LN tolerance, which indicated that HvHorcH may be an important regulator of LN stress response (LNSR). The HvJRL DEGs identified herein could provide new candidate genes for LN tolerance studies. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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13 pages, 5224 KiB  
Article
Phytohormone Response of Drought-Acclimated Illicium difengpi (Schisandraceae)
by Chao Wu, Baoyu Liu, Xiujiao Zhang, Manlian Wang and Huiling Liang
Int. J. Mol. Sci. 2023, 24(22), 16443; https://doi.org/10.3390/ijms242216443 - 17 Nov 2023
Viewed by 1303
Abstract
Illicium difengpi (Schisandraceae), which is an endemic, medicinal, and endangered species found in small and isolated populations that inhabit karst mountain areas, has evolved strategies to adapt to arid environments and is thus an excellent material for exploring the mechanisms of tolerance to [...] Read more.
Illicium difengpi (Schisandraceae), which is an endemic, medicinal, and endangered species found in small and isolated populations that inhabit karst mountain areas, has evolved strategies to adapt to arid environments and is thus an excellent material for exploring the mechanisms of tolerance to severe drought. In experiment I, I. difengpi plants were subjected to three soil watering treatments (CK, well-watered treatment at 50% of the dry soil weight for 18 days; DS, drought stress treatment at 10% of the dry soil weight for 18 days; DS-R, drought-rehydration treatment at 10% of the dry soil weight for 15 days followed by rewatering to 50% of the dry soil weight for another 3 days). The effects of the drought and rehydration treatments on leaf succulence, phytohormones, and phytohormonal signal transduction in I. difengpi plants were investigated. In experiment II, exogenous abscisic acid (ABA, 60 mg L−1) and zeatin riboside (ZR, 60 mg L−1) were sprayed onto DS-treated plants to verify the roles of exogenous phytohormones in alleviating drought injury. Leaf succulence showed marked changes in response to the DS and DS-R treatments. The relative concentrations of ABA, methyl jasmonate (MeJA), salicylic acid glucoside (SAG), and cis-zeatin riboside (cZR) were highly correlated with relative leaf succulence. The leaf succulence of drought-treated I. difengpi plants recovered to that observed with the CK treatment after exogenous application of ABA or ZR. Differentially expressed genes involved in biosynthesis and signal transduction of phytohormones (ABA and JA) in response to drought stress were identified by transcriptomic profiling. The current study suggested that the phytohormones ABA, JA, and ZR may play important roles in the response to severe drought and provides a preliminary understanding of the physiological mechanisms involved in phytohormonal regulation in I. difengpi, an endemic, medicinal, and highly drought-tolerant plant found in extremely small populations in the karst region of South China. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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14 pages, 2933 KiB  
Article
Transcription Factor TaMYB30 Activates Wheat Wax Biosynthesis
by Lang Liu, Haoyu Li, Xiaoyu Wang and Cheng Chang
Int. J. Mol. Sci. 2023, 24(12), 10235; https://doi.org/10.3390/ijms241210235 - 16 Jun 2023
Cited by 3 | Viewed by 887
Abstract
The waxy cuticle covers a plant’s aerial surface and contributes to environmental adaptation in land plants. Although past decades have seen great advances in understanding wax biosynthesis in model plants, the mechanisms underlying wax biosynthesis in crop plants such as bread wheat remain [...] Read more.
The waxy cuticle covers a plant’s aerial surface and contributes to environmental adaptation in land plants. Although past decades have seen great advances in understanding wax biosynthesis in model plants, the mechanisms underlying wax biosynthesis in crop plants such as bread wheat remain to be elucidated. In this study, wheat MYB transcription factor TaMYB30 was identified as a transcriptional activator positively regulating wheat wax biosynthesis. The knockdown of TaMYB30 expression using virus-induced gene silencing led to attenuated wax accumulation, increased water loss rates, and enhanced chlorophyll leaching. Furthermore, TaKCS1 and TaECR were isolated as essential components of wax biosynthetic machinery in bread wheat. In addition, silencing TaKCS1 and TaECR resulted in compromised wax biosynthesis and potentiated cuticle permeability. Importantly, we showed that TaMYB30 could directly bind to the promoter regions of TaKCS1 and TaECR genes by recognizing the MBS and Motif 1 cis-elements, and activate their expressions. These results collectively demonstrated that TaMYB30 positively regulates wheat wax biosynthesis presumably via the transcriptional activation of TaKCS1 and TaECR. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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Review

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21 pages, 6131 KiB  
Review
Melatonin-Mediated Molecular Responses in Plants: Enhancing Stress Tolerance and Mitigating Environmental Challenges in Cereal Crop Production
by Ihsan Muhammad, Shakeel Ahmad and Weijun Shen
Int. J. Mol. Sci. 2024, 25(8), 4551; https://doi.org/10.3390/ijms25084551 - 21 Apr 2024
Viewed by 410
Abstract
Cereal crops are crucial for global food security; however, they are susceptible to various environmental stresses that significantly hamper their productivity. In response, melatonin has emerged as a promising regulator, offering potential benefits for stress tolerance and crop growth. This review explores the [...] Read more.
Cereal crops are crucial for global food security; however, they are susceptible to various environmental stresses that significantly hamper their productivity. In response, melatonin has emerged as a promising regulator, offering potential benefits for stress tolerance and crop growth. This review explores the effects of melatonin on maize, sorghum, millet, rice, barley, and wheat, aiming to enhance their resilience to stress. The application of melatonin has shown promising outcomes, improving water use efficiency and reducing transpiration rates in millet under drought stress conditions. Furthermore, it enhances the salinity and heavy metal tolerance of millet by regulating the activity of stress-responsive genes. Similarly, melatonin application in sorghum enhances its resistance to high temperatures, low humidity, and nutrient deficiency, potentially involving the modulation of antioxidant defense and aspects related to photosynthetic genes. Melatonin also exerts protective effects against drought, salinity, heavy metal, extreme temperatures, and waterlogging stresses in maize, wheat, rice, and barley crops by decreasing reactive oxygen species (ROS) production through regulating the antioxidant defense system. The molecular reactions of melatonin upregulated photosynthesis, antioxidant defense mechanisms, the metabolic pathway, and genes and downregulated stress susceptibility genes. In conclusion, melatonin serves as a versatile tool in cereal crops, bolstering stress resistance and promoting sustainable development. Further investigations are warranted to elucidate the underlying molecular mechanisms and refine application techniques to fully harness the potential role of melatonin in cereal crop production systems. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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18 pages, 3807 KiB  
Review
The Roles of Mepiquate Chloride and Melatonin in the Morpho-Physiological Activity of Cotton under Abiotic Stress
by Yanqing Wu, Jiao Liu, Hao Wu, Yiming Zhu, Irshad Ahmad and Guisheng Zhou
Int. J. Mol. Sci. 2024, 25(1), 235; https://doi.org/10.3390/ijms25010235 - 23 Dec 2023
Viewed by 1001
Abstract
Cotton growth and yield are severely affected by abiotic stress worldwide. Mepiquate chloride (MC) and melatonin (MT) enhance crop growth and yield by reducing the negative effects of abiotic stress on various crops. Numerous studies have shown the pivotal role of MC and [...] Read more.
Cotton growth and yield are severely affected by abiotic stress worldwide. Mepiquate chloride (MC) and melatonin (MT) enhance crop growth and yield by reducing the negative effects of abiotic stress on various crops. Numerous studies have shown the pivotal role of MC and MT in regulating agricultural growth and yield. Nevertheless, an in-depth review of the prominent performance of these two hormones in controlling plant morpho-physiological activity and yield in cotton under abiotic stress still needs to be documented. This review highlights the effects of MC and MT on cotton morpho-physiological and biochemical activities; their biosynthetic, signaling, and transduction pathways; and yield under abiotic stress. Furthermore, we also describe some genes whose expressions are affected by these hormones when cotton plants are exposed to abiotic stress. The present review demonstrates that MC and MT alleviate the negative effects of abiotic stress in cotton and increase yield by improving its morpho-physiological and biochemical activities, such as cell enlargement; net photosynthesis activity; cytokinin contents; and the expression of antioxidant enzymes such as catalase, peroxidase, and superoxide dismutase. MT delays the expression of NCED1 and NCED2 genes involved in leaf senescence by decreasing the expression of ABA-biosynthesis genes and increasing the expression of the GhYUC5, GhGA3ox2, and GhIPT2 genes involved in indole-3-acetic acid, gibberellin, and cytokinin biosynthesis. Likewise, MC promotes lateral root formation by activating GA20x genes involved in gibberellin catabolism. Overall, MC and MT improve cotton’s physiological activity and antioxidant capacity and, as a result, improve the ability of the plant to resist abiotic stress. The main purpose of this review is to present an in-depth analysis of the performance of MC and MT under abiotic stress, which might help to better understand how these two hormones regulate cotton growth and productivity. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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34 pages, 1780 KiB  
Review
Emerging Roles of Receptor-like Protein Kinases in Plant Response to Abiotic Stresses
by Akanksha Gandhi and Ralf Oelmüller
Int. J. Mol. Sci. 2023, 24(19), 14762; https://doi.org/10.3390/ijms241914762 - 29 Sep 2023
Viewed by 1512
Abstract
The productivity of plants is hindered by unfavorable conditions. To perceive stress signals and to transduce these signals to intracellular responses, plants rely on membrane-bound receptor-like kinases (RLKs). These play a pivotal role in signaling events governing growth, reproduction, hormone perception, and defense [...] Read more.
The productivity of plants is hindered by unfavorable conditions. To perceive stress signals and to transduce these signals to intracellular responses, plants rely on membrane-bound receptor-like kinases (RLKs). These play a pivotal role in signaling events governing growth, reproduction, hormone perception, and defense responses against biotic stresses; however, their involvement in abiotic stress responses is poorly documented. Plant RLKs harbor an N-terminal extracellular domain, a transmembrane domain, and a C-terminal intracellular kinase domain. The ectodomains of these RLKs are quite diverse, aiding their responses to various stimuli. We summarize here the sub-classes of RLKs based on their domain structure and discuss the available information on their specific role in abiotic stress adaptation. Furthermore, the current state of knowledge on RLKs and their significance in abiotic stress responses is highlighted in this review, shedding light on their role in influencing plant–environment interactions and opening up possibilities for novel approaches to engineer stress-tolerant crop varieties. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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21 pages, 2327 KiB  
Review
Functions of Plant Phytochrome Signaling Pathways in Adaptation to Diverse Stresses
by Xue Qiu, Guanghua Sun, Fen Liu and Weiming Hu
Int. J. Mol. Sci. 2023, 24(17), 13201; https://doi.org/10.3390/ijms241713201 - 25 Aug 2023
Cited by 2 | Viewed by 2039
Abstract
Phytochromes are receptors for red light (R)/far-red light (FR), which are not only involved in regulating the growth and development of plants but also in mediated resistance to various stresses. Studies have revealed that phytochrome signaling pathways play a crucial role in enabling [...] Read more.
Phytochromes are receptors for red light (R)/far-red light (FR), which are not only involved in regulating the growth and development of plants but also in mediated resistance to various stresses. Studies have revealed that phytochrome signaling pathways play a crucial role in enabling plants to cope with abiotic stresses such as high/low temperatures, drought, high-intensity light, and salinity. Phytochromes and their components in light signaling pathways can also respond to biotic stresses caused by insect pests and microbial pathogens, thereby inducing plant resistance against them. Given that, this paper reviews recent advances in understanding the mechanisms of action of phytochromes in plant resistance to adversity and discusses the importance of modulating the genes involved in phytochrome signaling pathways to coordinate plant growth, development, and stress responses. Full article
(This article belongs to the Special Issue Molecular Mechanisms of Plant Abiotic Stress Tolerance)
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