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Plants
Special Issues
Plant Growth and Development under Metal Stress
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Plant Growth and Development under Metal Stress

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Development and Morphogenesis".

Deadline for manuscript submissions: closed (20 July 2021) | Viewed by 6333

Special Issue Editors

Dr. Andrea Andreucci

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Guest Editor
Department of Biology, University of Pisa, 56124-Pisa, Italy
Interests: plant responses to metal stress; plant development; gene expression; plant transformation; phytoremediation; phytochelatin synthase
Prof. Giuseppina Falasca

E-Mail Website
Guest Editor
Department of Environmental Biology, Sapienza University of Rome, P. le Aldo Moro, 5, 00185 Rome, Italy
Interests: plant responses to metal stress; plant development; genetic and hormonal control of adventitious root; cyto-histology; epifluorescence

Special Issue Information

Dear Colleagues,

Plants are organisms capable of using the inorganic compounds present in the soil as a food source. Among these, numerous metals such as iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn) are essential for many biochemical and physiological process, but others like cadmium (Cd), lead (Pb), and arsenic (As) are non-essential and have no clear biological function in plants. For both groups, essential and non-essential, the levels can affect the plant growth and development depending on the plant species and chemical status. For the essential compounds, each species shows an optimal concentration range for each ion type, above and below which plants cannot growth properly. There are more questions about non-essential metals: how is the uptake controlled, what are the effects on the plant, what is the tolerated concentration, how can plants neutralize their toxic effects, and more.

Therefore, in this Special Issue, we welcome articles (original research papers, perspectives, hypotheses, opinions, reviews, modeling approaches, and methods) that focus on aspects of plant metal stress including biochemistry, physiology, genes, proteins, metabolites, nutrition, and environment at all levels comprising transcriptomic, proteomic, metabolomic, and epigenomic studies, plant microbiome studies, nutrient and/or hormone interaction stuidies, as well as studies addressing plant health, senescence, whole-plant studies, field trials, and agronomics in model plants, crop plants, trees, aquatic plants, and native species.

Dr. Andrea Andreucci
Prof. Giuseppina Falasca
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. Plants is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). 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

  • heavy metals/metalloids and plant development
  • impact of metal stress on plant hormone homeostasis
  • metal stress and plant root architecture
  • metal stress tolerance and adaptation
  • gene expression in response to metal stress
  • metal uptake and translocation
  • metal transporters
  • metal deficiency

Published Papers (2 papers)

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Research

23 pages, 1909 KiB  
Article
Epiphytic PGPB Bacillus megaterium AFI1 and Paenibacillus nicotianae AFI2 Improve Wheat Growth and Antioxidant Status under Ni Stress
by Veronika N. Pishchik, Polina S. Filippova, Galina V. Mirskaya, Yuriy V. Khomyakov, Vitaliy E. Vertebny, Viktoriya I. Dubovitskaya, Yuliya V. Ostankova, Aleksandr V. Semenov, Debasis Chakrabarty, Evgeny V. Zuev and Vladimir K. Chebotar
Plants 2021, 10(11), 2334; https://doi.org/10.3390/plants10112334 - 29 Oct 2021
Cited by 14 | Viewed by 3113
Abstract
The present study demonstrates the Ni toxicity-ameliorating and growth-promoting abilities of two different bacterial isolates when applied to wheat (Triticum aestivum L.) as the host plant. Two bacterial strains tolerant to Ni stress were isolated from wheat seeds and selected based on [...] Read more.
The present study demonstrates the Ni toxicity-ameliorating and growth-promoting abilities of two different bacterial isolates when applied to wheat (Triticum aestivum L.) as the host plant. Two bacterial strains tolerant to Ni stress were isolated from wheat seeds and selected based on their ability to improve the germination of wheat plants; they were identified as Bacillus megaterium AFI1 and Paenibacillus nicotianae AFI2. The protective effects of these epiphytic bacteria against Ni stress were studied in model experiments with two wheat cultivars: Ni stress-tolerant Leningradskaya 6 and susceptible Chinese spring. When these isolates were used as the inoculants applied to Ni-treated wheat plants, the growth parameters and the levels of photosynthetic pigments of the two wheat cultivars both under normal and Ni-stress conditions were increased, though B. megaterium AFI1 had a more pronounced ameliorative effect on the Ni contents in plant tissues due to its synthesis of siderophores. Over the 10 days of Ni exposure, the plant growth promotion bacteria (PGPB) significantly reduced the lipid peroxidation (LPO), ascorbate peroxidase (APX), superoxide dismutase (SOD) activities and proline content in the leaves of both wheat cultivars. The PGPB also increased peroxidase (POX) activity and the levels of chlorophyll a, chlorophyll b, and carotenoids in the wheat leaves. It was concluded that B. megaterium AFI1 is an ideal candidate for bioremediation and wheat growth promotion against Ni-induced oxidative stress, as it increases photosynthetic pigment contents, induces the antioxidant defense system, and lowers Ni metal uptake. Full article
(This article belongs to the Special Issue Plant Growth and Development under Metal Stress)
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17 pages, 4060 KiB  
Article
The Role of Aquaporin Overexpression in the Modulation of Transcription of Heavy Metal Transporters under Cadmium Treatment in Poplar
by Andrea Neri, Silvia Traversari, Andrea Andreucci, Alessandra Francini and Luca Sebastiani
Plants 2021, 10(1), 54; https://doi.org/10.3390/plants10010054 - 29 Dec 2020
Cited by 8 | Viewed by 2221
Abstract
Populus alba ‘Villafranca’ clone is well-known for its tolerance to cadmium (Cd). To determine the mechanisms of Cd tolerance of this species, wild-type (wt) plants were compared with transgenic plants over-expressing an aquaporin (aqua1, GenBank GQ918138). Plants were maintained in hydroponic [...] Read more.
Populus alba ‘Villafranca’ clone is well-known for its tolerance to cadmium (Cd). To determine the mechanisms of Cd tolerance of this species, wild-type (wt) plants were compared with transgenic plants over-expressing an aquaporin (aqua1, GenBank GQ918138). Plants were maintained in hydroponic conditions with Hoagland’s solution and treated with 10 µM of Cd, renewed every 5 d. The transcription levels of heavy metal transporter genes (PaHMA2, PaNRAMP1.3, PaNRAMP2, PaNRAMP3.1, PaNRAMP3.2, PaABCC9, and PaABCC13) were analyzed at 1, 7, and 60 d of treatment. Cd application did not induce visible toxicity symptoms in wt and aqua1 plants even after 2 months of treatment confirming the high tolerance of this poplar species to Cd. Most of the analyzed genes showed in wt plants a quick response in transcription at 1 d of treatment and an adaptation at 60 d. On the contrary, a lower transcriptional response was observed in aqua1 plants in concomitance with a higher Cd concentration in medial leaves. Moreover, PaHMA2 showed at 1 d an opposite trend within organs since it was up-regulated in root and stem of wt plants and in leaves of aqua1 plants. In summary, aqua1 overexpression in poplar improved Cd translocation suggesting a lower Cd sensitivity of aqua1 plants. This different response might be due to a different transcription of PaNRAMP3 genes that were more transcribed in wt line because of the importance of this gene in Cd compartmentalization. Full article
(This article belongs to the Special Issue Plant Growth and Development under Metal Stress)
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