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Biology
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Advances in Research on Phytohormone Regulation and Disease Resistance
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Advances in Research on Phytohormone Regulation and Disease Resistance

A special issue of Biology (ISSN 2079-7737). This special issue belongs to the section "Plant Science".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 2252

Special Issue Editors

Dr. Yan Cheng

E-Mail Website
Guest Editor
College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
Interests: phytohormone regulation; plant disease resistance; salinity tolerance in plants; cell cycle regulation; female gametophyte development
Dr. Mohammad Aslam

E-Mail Website
Guest Editor
Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Interests: phytohormone regulation; abiotic stress; flowering; gametophyte development

Special Issue Information

Dear Colleagues,

Unlike animals, which can escape adverse environments, the sessile lifestyle of plants makes it necessary for them to cope with both biological and abiotic stresses in the environment. During evolution, plants have developed a much more sophisticated system than animals for dealing with environmental challenges to ensure growth and survival. Phytohormones (PHs) are crucial in regulating various physiological and biochemical processes in plants. The results of recent studies highlight the role of phytohormones such as abscisic acid, salicylic acid, ethylene, and jasmonates in plant responses to abiotic and biotic stresses. The involvement of cytokinins, gibberellins, auxins, and relatively novel phytohormones, such as strigolactones and brassinosteroids, in plant growth and development under normal and stressful conditions has also been documented. Despite significant advancements in understanding the perception, signal transduction, gene regulation, and downstream pathways of phytohormone regulation, further review and investigation are still needed to achieve a systematic understanding of plant hormone regulation in response to abiotic stress and diseases. For this issue, we welcome submissions related to phytohormone regulation, including but not limited to biosynthesis, perception, signal transduction, downstream gene expression regulation, and regulation in response to plant diseases.

Dr. Yan Cheng
Dr. Mohammad Aslam
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. Biology 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 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

  • phytohormones
  • disease
  • abscisic acid
  • auxins
  • brassinosteroids
  • cytokinins
  • ethylene
  • gibberellins
  • jasmonates
  • salicylic acid
  • strigolactones

Published Papers (2 papers)

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Research

15 pages, 3192 KiB  
Article
Cytokinin and Metabolites Affect Rhizome Growth and Development in Kentucky Bluegrass (Poa pratensis)
by Fu Ran, Xiaoming Bai, Juanxia Li, Yajuan Yuan, Changning Li, Ping Li and Hui Chen
Biology 2023, 12(8), 1120; https://doi.org/10.3390/biology12081120 - 11 Aug 2023
Viewed by 1029
Abstract
Rhizome growth and development is regulated by phytohormone. However, endogenous phytohormones affect rhizome initiation, and sustained growth in perennial grass species remains elusive. In this study, we investigated the morphological characteristics and the content of indole-3-acetic acid (IAA), zeatin (ZT), gibberellic acid (GA3), [...] Read more.
Rhizome growth and development is regulated by phytohormone. However, endogenous phytohormones affect rhizome initiation, and sustained growth in perennial grass species remains elusive. In this study, we investigated the morphological characteristics and the content of indole-3-acetic acid (IAA), zeatin (ZT), gibberellic acid (GA3), and abscisic acid (ABA) in the rhizomes of two different Kentucky bluegrass. Using ultra-performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS), we performed metabolite analysis of two different rhizomes. In our study, the multi-rhizome Kentucky bluegrass material ‘Yuzhong’ had an average of 1113 rhizomes, while the few-rhizome material ‘Anding’ had an average of 347 rhizomes. The diameter of rhizome and length of rhizome internode in ‘Yuzhong’ were 1.68-fold and 1.33-fold higher than that of the ‘Anding’, respectively. The rhizome dry weight of ‘Yuzhong’ was 75.06 g, while the ‘Anding’ was 20.79 g. ‘Yuzhong’ had a higher ZT content (5.50 μg·g−1), which is 2.4-fold that of ‘Anding’ (2.27 μg·g−1). In contrast, the IAA, ABA, and GA3 content of rhizome were markedly higher in ‘Anding’ than ‘Yuzhong’. Correlation analysis revealed significant correlations between ZT and ZT/ABA with the number of rhizomes, diameter of rhizome, and length of rhizome internode, whereas IAA, ABA, GA3, and IAA/ZT were opposite. In the metabolic profiles, we identified 163 differentially expressed metabolites (DEMs) (60 upregulated and 103 downregulated) in positive ion mode and 75 DEMs (36 upregulated and 39 downregulated) in negative ion mode. Histidine metabolism and ABC transporters pathways were the most significantly enriched in the positive and negative ion mode, respectively, both of which are involved in the synthesis and transport of cytokinin. These results indicate that cytokinin is crucial for rhizome development and promotes rhizome germination and growth of Kentucky bluegrass. Full article
(This article belongs to the Special Issue Advances in Research on Phytohormone Regulation and Disease Resistance)
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12 pages, 2037 KiB  
Article
Barnyard Grass Stress Triggers Changes in Root Traits and Phytohormone Levels in Allelopathic and Non-Allelopathic Rice
by Qiling Yan, Jianhua Tong, Shuyan Li and Qiong Peng
Biology 2023, 12(8), 1074; https://doi.org/10.3390/biology12081074 - 01 Aug 2023
Cited by 1 | Viewed by 776
Abstract
Despite the growing knowledge concerning allelopathic interference with barnyard grass, little is understood regarding the competitive physiological mechanisms of the interaction between allelopathic rice and herbicide-resistant barnyard grass. A hydroponic system was employed to investigate the root morphological traits and different phytohormonal changes [...] Read more.
Despite the growing knowledge concerning allelopathic interference with barnyard grass, little is understood regarding the competitive physiological mechanisms of the interaction between allelopathic rice and herbicide-resistant barnyard grass. A hydroponic system was employed to investigate the root morphological traits and different phytohormonal changes in allelopathic and non-allelopathic rice cultivars when co-planted with quinclorac-resistant and -susceptible barnyard grass, respectively. The results show that shoot and root biomass were greater in PI. Barnyard grass stress induced an increase in shoot and root biomass in PI at 7 and 14 days of co-culturing rice and barnyard grass. Especially under the stress of quinclorac-resistant barnyard grass, the shoot biomass of PI increased by 23% and 68%, respectively, and the root biomass increased by 37% and 34%, respectively. In terms of root morphology, PI exhibited a significantly higher fine-root length, in root diameters of <0.5 mm, a greater number of root tips, and longer root tips compared to LE. The response to quinclorac-resistant barnyard grass stress was consistent in terms of the SA and JA content. The obvious accumulation of SA and JA was observed in two rice cultivars under quinclorac-resistant barnyard grass stress, with greater amounts of SA and JA in PI. The significant decrease in auxin (IAA) and abscisic acid (ABA) content in rice was detected from 7 to 14 days under co-culture stress. Additionally, highly significant and positive correlations were found between SA and JA content, and the number of root tips and root tip length at root diameters of 0–0.5 mm in rice. Full article
(This article belongs to the Special Issue Advances in Research on Phytohormone Regulation and Disease Resistance)
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