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Agronomy
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Regulatory Mechanism of Growth Regulators on Crop Growth and Development:...
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Regulatory Mechanism of Growth Regulators on Crop Growth and Development: 2nd Edition

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Plant-Crop Biology and Biochemistry".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1566

Special Issue Editor

Prof. Dr. Allan Klynger Da Silva Lobato

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Guest Editor
Núcleo de Pesquisa Vegetal Básica e Aplicada, Universidade Federal Rural da Amazônia, Rodovia PA 256, Paragominas, Pará, Brazil
Interests: abiotic stresses; biotic stresses; brassinosteroids; plant growth regulators; neurotransmitters; gasotransmitters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Climate change is increasing the frequency of extreme events, such as droughts and heat waves, limiting the growth and yield of relevant food crops, as well as threatening global food security. On other hand, plant growth regulators (PGRs) are organic or synthetic molecules, microorganisms, and chemical elements that affect plant metabolism. Therefore, in the current world scenario, research and solutions using brassinosteroids, gasotransmitters, microorganisms, phytohormones, neurotransmitters, and essential elements are strategies for ensuring food security and improving plant tolerance to climate change.

This Special Issue welcomes novel research and reviews covering all topics related (but not limited) to action mechanisms modulated by organic or synthetic molecules, microorganisms, and chemical elements, aiming to mitigate several stresses, including drought, flooding, salinity, toxic metals, low or high temperature, low or high irradiance, acid rain, and nutritional stress.

Prof. Dr. Allan Klynger Da Silva Lobato
Guest Editor

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. Agronomy is an international peer-reviewed open access monthly 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 2600 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

  • brassinosteroids
  • chemical elements
  • gasotransmitters
  • microorganisms
  • phytohormones
  • plant growth regulators
  • neurotransmitters

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Published Papers (2 papers)

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Research

13 pages, 5021 KiB  
Article
Dopamine and 24-Epibrassinolide Upregulate Root Resilience, Mitigating Lead Stress on Leaf Tissue and Stomatal Performance in Tomato Plants
by Lohana Ribeiro Prestes, Madson Mateus Santos da Silva, Sharon Graziela Alves da Silva, Maria Andressa Fernandes Gonçalves, Bruno Lemos Batista, Ivan Becari Viana and Allan Klynger da Silva Lobato
Agronomy 2025, 15(1), 239; https://doi.org/10.3390/agronomy15010239 - 18 Jan 2025
Viewed by 623
Abstract
Soil contamination linked to anthropogenic activities has become a serious environmental problem on a global scale. It is caused by heavy metals, such as lead (Pb). Dopamine (DOP) is a biogenic amine that acts as a neurotransmitter. It is found in plant organs [...] Read more.
Soil contamination linked to anthropogenic activities has become a serious environmental problem on a global scale. It is caused by heavy metals, such as lead (Pb). Dopamine (DOP) is a biogenic amine that acts as a neurotransmitter. It is found in plant organs and induces tolerance against abiotic stresses, including contamination. 24-epibrassinolide (EBR) stimulates metabolism, positively impacting flowering and production. This research aimed to evaluate whether EBR and DOP, applied alone or combined, can mitigate the impacts caused by Pb on roots and leaves by measuring root and leaf structures and stomatal behavior. For roots, both plant growth regulators maximized the epidermis, with increases in treatments Pb2+ − DOP + EBR (45%), Pb2+ + DOP − EBR (24%), and Pb2+ + DOP + EBR (36%), when compared with equal treatment without Pb2+. To leaves, the tested molecules improved the leaf structures, significantly increasing palisade parenchyma and spongy parenchyma. Parallelly, stomatal performance was boosted after treatments with EBR and DOP, confirmed by increments in stomatal density. Our study proved that EBR and DOP, alone or combined, mitigated the damages to leaves and roots exposed to Pb stress, but better results were found when EBR was applied alone. Full article
(This article belongs to the Special Issue Regulatory Mechanism of Growth Regulators on Crop Growth and Development: 2nd Edition)
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13 pages, 2540 KiB  
Article
Exogenous Application of Lanthanum Chloride to Rice at Booting Stage Can Increase Chlorophyll Content, Modulate Chlorophyll Fluorescence and Promote Grain Yield Under Deficit Irrigation
by Peng Liu, Xilin Fang, Yue Wang, Xin Yang and Qiang Li
Agronomy 2025, 15(1), 32; https://doi.org/10.3390/agronomy15010032 - 26 Dec 2024
Viewed by 643
Abstract
To sustain agricultural productivity and safeguard global food security, and confront the escalating challenges posed by climate change and water scarcity, it is essential to enhance the growth and productivity of rice under water stress. This study investigated the effects of lanthanum chloride [...] Read more.
To sustain agricultural productivity and safeguard global food security, and confront the escalating challenges posed by climate change and water scarcity, it is essential to enhance the growth and productivity of rice under water stress. This study investigated the effects of lanthanum chloride on the chlorophyll fluorescence characteristics and grain yield of rice under different irrigation modes. The rice cultivar H You 518 was selected and sprayed 20, 100, or 200 mg·L−1 lanthanum chloride at the booting and heading stages under deficit irrigation (where no rewatering was applied after the initiation of stress, allowing the water layer to evaporate naturally under high temperatures) or conventional irrigation (with daily rewatering to maintain a consistent water level). The results showed that the application of low concentrations lanthanum chloride promoted the chlorophyll content, whereas high concentrations decreased the chlorophyll content, under deficit irrigation, the effect of lanthanum chloride on the green fluorescence parameters of rice leaves at the booting stage was greater than that at the heading stage, and the booting stage was more sensitive to water deficit. The application of 100 mg·L−1 lanthanum chloride reduced the initial fluorescence (F0) and the non-photochemical quenching coefficient (qN); promoted the activity of leaf photosynthetic system II (PSII); and maximized the photochemical quantum yield (Fv/Fm), photochemical quenching coefficient (qP), and PSII relative electron transfer efficiency (ETR). Under deficit irrigation, this treatment significantly enhanced grain yield by increasing the thousand-grain weight, spikelet filling rate, and number of grains per panicle. These results suggest that spraying 100 mg·L−1 lanthanum chloride at the booting stage under deficit irrigation can effectively increase the chlorophyll content, thereby increasing the light energy conversion efficiency of the PS II reaction center, ultimately resulting in increased spikelet filling rate and grain yields. Full article
(This article belongs to the Special Issue Regulatory Mechanism of Growth Regulators on Crop Growth and Development: 2nd Edition)
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