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New Insights into Plants and Insects Interactions
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New Insights into Plants and Insects Interactions

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: 29 April 2024 | Viewed by 6813

Special Issue Editors

Prof. Dr. Yonggen Lou

E-Mail Website
Guest Editor
Institute of Insect Sciences, Zhejiang University, Hangzhou 310058, China
Interests: insect–plant interactions; herbivore-induced plant defense; defense-related signaling
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xiaoling Sun

E-Mail Website
Guest Editor
Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
Interests: insect–plant interaction; herbivore-induced plant defense; defense-related signaling pathways; tea germplasm improvement and resistance breeding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

To protect themselves from herbivorous insects, plants have developed sophisticated defense mechanisms. When attacked by herbivorous insects, plants promptly and specifically perceive damage- and insect-associated molecular patterns via pattern recognition receptor complexes and then activate multiple signaling pathways, such as pathways mediated by mitogen-activated protein kinase cascades, jasmonic acid, salicylic acid, abscisic acid and ethylene. These activated pathways enhance the expression of defensive gens and the production of defensive compounds, and finally increase the direct and indirect resistance of plants to insects. On the other hand, adapted herbivorous insects could not only detoxify or tolerate plant toxins via specific detoxification systems but also secrete effectors into plants to suppress defensive responses in plants or enhance plant susceptibility as well. Deciphering the mechanisms underlying insect–plant interactions is very important for sustainable management of insect pests. This Special Issue welcomes original research and review articles that present recent advances in the field, with a focus on the molecular mechanisms related to plant defensive response, insect elicitors and effectors, and insect detoxification. We expect to publish 18 to 20 research articles and review articles in this Special Issue.

Prof. Dr. Yonggen Lou
Prof. Dr. Xiaoling Sun
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant defense responses
  • elicitors
  • effectors
  • defense-related signaling
  • insect–plant interactions
  • tritrophic interactions
  • detoxification
  • defensive compounds
  • defensive genes

Published Papers (6 papers)

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14 pages, 1132 KiB  
Review
Recent Progress Regarding Jasmonates in Tea Plants: Biosynthesis, Signaling, and Function in Stress Responses
by Xin Zhang, Yongchen Yu, Jin Zhang, Xiaona Qian, Xiwang Li and Xiaoling Sun
Int. J. Mol. Sci. 2024, 25(2), 1079; https://doi.org/10.3390/ijms25021079 - 16 Jan 2024
Viewed by 826
Abstract
Tea plants have to adapt to frequently challenging environments due to their sessile lifestyle and perennial evergreen nature. Jasmonates regulate not only tea plants’ responses to biotic stresses, including herbivore attack and pathogen infection, but also tolerance to abiotic stresses, such as extreme [...] Read more.
Tea plants have to adapt to frequently challenging environments due to their sessile lifestyle and perennial evergreen nature. Jasmonates regulate not only tea plants’ responses to biotic stresses, including herbivore attack and pathogen infection, but also tolerance to abiotic stresses, such as extreme weather conditions and osmotic stress. In this review, we summarize recent progress about jasmonaic acid (JA) biosynthesis and signaling pathways, as well as the underlying mechanisms mediated by jasmontes in tea plants in responses to biotic stresses and abiotic stresses. This review provides a reference for future research on the JA signaling pathway in terms of its regulation against various stresses of tea plants. Due to the lack of a genetic transformation system, the JA pathway of tea plants is still in the preliminary stages. It is necessary to perform further efforts to identify new components involved in the JA regulatory pathway through the combination of genetic and biochemical methods. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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16 pages, 2020 KiB  
Article
The Plant Virus Tomato Spotted Wilt Orthotospovirus Benefits Its Vector Frankliniella occidentalis by Decreasing Plant Toxic Alkaloids in Host Plant Datura stramonium
by Zhijun Zhang, Jiahui Zhang, Xiaowei Li, Jinming Zhang, Yunsheng Wang and Yaobin Lu
Int. J. Mol. Sci. 2023, 24(19), 14493; https://doi.org/10.3390/ijms241914493 - 24 Sep 2023
Viewed by 1171
Abstract
The transmission of insect-borne viruses involves sophisticated interactions between viruses, host plants, and vectors. Chemical compounds play an important role in these interactions. Several studies reported that the plant virus tomato spotted wilt orthotospovirus (TSWV) increases host plant quality for its vector and [...] Read more.
The transmission of insect-borne viruses involves sophisticated interactions between viruses, host plants, and vectors. Chemical compounds play an important role in these interactions. Several studies reported that the plant virus tomato spotted wilt orthotospovirus (TSWV) increases host plant quality for its vector and benefits the vector thrips Frankliniella occidentalis. However, few studies have investigated the chemical ecology of thrips vectors, TSWV, and host plants. Here, we demonstrated that in TSWV-infected host plant Datura stramonium, (1) F. occidentalis were more attracted to feeding on TSWV-infected D. stramonium; (2) atropine and scopolamine, the main tropane alkaloids in D. stramonium, which are toxic to animals, were down-regulated by TSWV infection of the plant; and (3) F. occidentalis had better biological performance (prolonged adult longevity and increased fecundity, resulting in accelerated population growth) on TSWV-infected D. stramonium than on TSWV non-infected plants. These findings provide in-depth information about the physiological mechanisms responsible for the virus’s benefits to its vector by virus infection of plant regulating alkaloid accumulation in the plant. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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17 pages, 1240 KiB  
Review
Recent Advances in the Genetic and Biochemical Mechanisms of Rice Resistance to Brown Planthoppers (Nilaparvata lugens Stål)
by Shaojie Shi, Huiying Wang, Wenjun Zha, Yan Wu, Kai Liu, Deze Xu, Guangcun He, Lei Zhou and Aiqing You
Int. J. Mol. Sci. 2023, 24(23), 16959; https://doi.org/10.3390/ijms242316959 - 30 Nov 2023
Cited by 1 | Viewed by 1270
Abstract
Rice (Oryza sativa L.) is the staple food of more than half of Earth’s population. Brown planthopper (Nilaparvata lugens Stål, BPH) is a host-specific pest of rice responsible for inducing major losses in rice production. Utilizing host resistance to control N. [...] Read more.
Rice (Oryza sativa L.) is the staple food of more than half of Earth’s population. Brown planthopper (Nilaparvata lugens Stål, BPH) is a host-specific pest of rice responsible for inducing major losses in rice production. Utilizing host resistance to control N. lugens is considered to be the most cost-effective method. Therefore, the exploration of resistance genes and resistance mechanisms has become the focus of breeders’ attention. During the long-term co-evolution process, rice has evolved multiple mechanisms to defend against BPH infection, and BPHs have evolved various mechanisms to overcome the defenses of rice plants. More than 49 BPH-resistance genes/QTLs have been reported to date, and the responses of rice to BPH feeding activity involve various processes, including MAPK activation, plant hormone production, Ca2+ flux, etc. Several secretory proteins of BPHs have been identified and are involved in activating or suppressing a series of defense responses in rice. Here, we review some recent advances in our understanding of rice–BPH interactions. We also discuss research progress in controlling methods of brown planthoppers, including cultural management, trap cropping, and biological control. These studies contribute to the establishment of green integrated management systems for brown planthoppers. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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10 pages, 1890 KiB  
Brief Report
Perfect Complementarity Mechanism for Aphid Control: Oligonucleotide Insecticide Macsan-11 Selectively Causes High Mortality Rate for Macrosiphoniella sanborni Gillette
by Yelizaveta V. Puzanova, Ilya A. Novikov, Anastasiya I. Bilyk, Alexander K. Sharmagiy, Yuri V. Plugatar and Volodymyr V. Oberemok
Int. J. Mol. Sci. 2023, 24(14), 11690; https://doi.org/10.3390/ijms241411690 - 20 Jul 2023
Cited by 1 | Viewed by 870
Abstract
Macrosiphoniella sanborni is a widespread pest of Chrysanthemum morifolium that causes significant damage to world floriculture. Chemical insecticides and biological methods of control have a number of disadvantages that can be improved by using oligonucleotide insecticides. In this article, we present, for the [...] Read more.
Macrosiphoniella sanborni is a widespread pest of Chrysanthemum morifolium that causes significant damage to world floriculture. Chemical insecticides and biological methods of control have a number of disadvantages that can be improved by using oligonucleotide insecticides. In this article, we present, for the first time, the results of using oligonucleotide insecticides, for which the target sequence is an internal transcribed spacer (ITS) in a polycistronic rRNA transcript. The mortality of wingless aphid individuals after a Macsan-11 treatment was recorded at a level of 67.15 ± 3.32% 7 days after a single treatment with a solution at a concentration of 100 ng/μL and 97.38 ± 2.49% 7 days after a double treatment with a solution of the same concentration and a daily interval. The contact use of the control oligonucleotide (ACTG)2ACT-11. as well as the oligonucleotide insecticides Macsan-11(3′) and Macsan-11(5′) was not accompanied by insect mortality. Given the high variability in the internal transcribed spacer, which has proven to be a promising target for the action of oligonucleotide insecticides, it is possible to create selective preparations. This study showed the prospects of ribosomal insect pest genes as targets for the action of olinscides, and also demonstrated the high specificity of such insecticidal agents. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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17 pages, 6429 KiB  
Article
Four-Chlorophenoxyacetic Acid Treatment Induces the Defense Resistance of Rice to White-Backed Planthopper Sogatella furcifera
by Wanwan Wang, Haiyun Rui, Lei Yu, Nuo Jin, Wan Liu, Chen Guo, Yumeng Cheng and Yonggen Lou
Int. J. Mol. Sci. 2023, 24(21), 15722; https://doi.org/10.3390/ijms242115722 - 29 Oct 2023
Viewed by 1060
Abstract
Chemical elicitors can increase plant defense against herbivorous insects and pathogens. The use of synthetic chemical elicitors is likely to be an alternative to traditional pesticides for crop pest control. However, only a few synthetic chemicals are reported to protect plants by regulating [...] Read more.
Chemical elicitors can increase plant defense against herbivorous insects and pathogens. The use of synthetic chemical elicitors is likely to be an alternative to traditional pesticides for crop pest control. However, only a few synthetic chemicals are reported to protect plants by regulating signaling pathways, increasing the levels of defense metabolites and interfering with insect feeding. Here, we found that the exogenous application of a phenoxycarboxylic compound, 4-chlorophenoxyacetic acid (4-CPA), can induce chemical defenses to protect rice plants from white-backed planthoppers (WBPH, Sogatella furcifera). Four-CPA was rapidly taken up by plant roots and degraded to 4-chlorophenol (4-CP). Four-CPA treatment modulated the activity of peroxidase (POD) and directly induced the deposition of lignin-like polymers using hydrogen peroxide (H2O2) as the electron acceptor. The polymers, which are thought to prevent the planthopper’s stylet from reaching the phloem, were broken down by WBPH nymphs. Meanwhile, 4-CPA increased the levels of flavonoids and phenolamines (PAs). The increased flavonoids and PAs, together with the degradation product of the polymers, avoided nymphal feeding and prolonged the nymphal period for 1 day. These results indicate that 4-CPA has the potential to be used as a chemical elicitor to protect rice from planthoppers. Moreover, these findings also open a pathway for molecule structure design of phenoxycarboxylic compounds as chemical elicitors. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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15 pages, 4703 KiB  
Article
Knocking Out OsRLK7-1 Impairs Rice Growth and Development but Enhances Its Resistance to Planthoppers
by Shanjie Han, Zhifan Shen, Qing Gao, Nuo Jin and Yonggen Lou
Int. J. Mol. Sci. 2023, 24(19), 14569; https://doi.org/10.3390/ijms241914569 - 26 Sep 2023
Viewed by 842
Abstract
Leucine-rich repeat receptor-like kinases (LRR-RLKs) are an important subfamily of receptor-like kinases (RLKs) in plants that play key roles in sensing different biotic and abiotic stress. However, the role of LRR-RLKs in herbivore-induced plant defense remains largely elusive. Here, we found that the [...] Read more.
Leucine-rich repeat receptor-like kinases (LRR-RLKs) are an important subfamily of receptor-like kinases (RLKs) in plants that play key roles in sensing different biotic and abiotic stress. However, the role of LRR-RLKs in herbivore-induced plant defense remains largely elusive. Here, we found that the expression of a rice gene, OsRLK7-1, was induced by mechanical wounding, but was slightly suppressed by the infestation of gravid females of brown planthopper (BPH, Nilaparvata lugens) or white-backed planthopper (WBPH, Sogatella furcifera). Through targeted disruption of OsRLK7-1 (resulting in the ko-rlk lines), we observed an augmentation in transcript levels of BPH-induced OsMPK3, OsWRKY30, OsWRKY33, and OsWRKY45, alongside heightened levels of planthopper-induced jasmonic acid, JA-isoleucine, and abscisic acid in plant tissues. These dynamic changes further facilitated the biosynthesis of multiple phenolamides within the rice plants, culminating in an enhanced resistance to planthopper infestations under both lab and field conditions. In addition, knocking out OsRLK7-1 impaired plant growth and reproduction. These results suggest that OsRLK7-1 plays an important role in regulating rice growth, development, and rice-planthopper interactions. Full article
(This article belongs to the Special Issue New Insights into Plants and Insects Interactions)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Dear Colleagues,

To protect themselves from herbivorous insects, plants have developed sophisticated defense mechanisms. When attacked by herbivorous insects, plants promptly and specifically perceive damage- and insect-associated molecular patterns via pattern recognition receptor complexes and then activate multiple signaling pathways, such as pathways mediated by mitogen-activated protein kinase cascades, jasmonic acid, salicylic acid, abscisic acid and ethylene. These activated pathways enhance the expression of defensive gens and the production of defensive compounds, and finally increase the direct and indirect resistance of plants to insects. On the other hand, adapted herbivorous insects could not only detoxify or tolerate plant toxins via specific detoxification systems but also secrete effectors into plants to suppress defensive responses in plants or enhance plant susceptibility as well. Deciphering the mechanisms underlying insect–plant interactions is very important for sustainable management of insect pests. This Special Issue welcomes original research and review articles that present recent advances in the field, with a focus on the molecular mechanisms related to plant defensive response, insect elicitors and effectors, and insect detoxification. We expect to publish 18 to 20 research articles and review articles in this Special Issue.

Prof. Dr. Yonggen Lou
Prof. Dr. Xiaoling Sun
Guest Editors

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