Plant Stress Responses: Host–Microbe Interactions, Reactive Oxygen Species Signaling, the Role of Phytohormones, and Disease Control

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Pest and Disease Management".

Deadline for manuscript submissions: closed (29 March 2023) | Viewed by 4111

Special Issue Editor

College of Horticulture, Northwest A&F University, Yangling 712100, China
Interests: stress; resistance; ROS; phytohormone; host-pathogen interactions; disease control; molecular breeding
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Plants are constantly challenged by various abiotic and biotic stresses in their natural environment, which reduces and limits the productivity of agricultural crops. Abiotic stress causes the loss of major crop plants worldwide and includes radiation, salinity, floods, drought, extremes in temperature, heavy metals, etc. On the other hand, attacks by various pathogens such as fungi, bacteria, oomycetes, nematodes, and herbivores are included in biotic stresses. Plants do not have the ability to escape from these environmental cues, so they have evolved sophisticated defense mechanisms to recognize and fight these biotic and abiotic stresses instead. A crucial step in plant defense is the timely perception of stress in order to respond in a rapid and efficient manner. After recognition, plants’ constitutive basal defense mechanisms lead to an activation of complex signaling cascades of defense, varying from one stress to another. Following exposure to abiotic and/or biotic stress, specific ion channels and kinase cascades are activated, reactive oxygen species (ROS), phytohormones such as abscisic acid (ABA), salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) accumulate, and a reprogramming of the genetic machinery results in adequate defense reactions and an increase in plant tolerance to minimize the biological damage caused by stress.

In this exciting context, Agronomy is launching a Special Issue devoted to ‘Plant Stress Responses: Host–Microbe Interactions, Reactive Oxygen Species Signaling, the Role of Phytohormones, and Disease Control’. Both original research and review articles are welcome. Potential topics include but are not limited to the following:

  • Physiological, metabolic, and molecular responses of plants to abiotic and biotic stresses;
  • Identification of novel players involved in plant responses to stress conditions;
  • Identification of biotechnological strategies to increase plant tolerance to abiotic and biotic stresses;
  • Understanding molecular interactions and crosstalk among different stress conditions.

Dr. Min Gao
Guest Editor

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Keywords

  • abiotic stresses
  • biotic stresses
  • resistance
  • ROS
  • phytohormone
  • host–pathogen interactions
  • molecular breeding

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Published Papers (2 papers)

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Research

11 pages, 2373 KiB  
Article
Pb4CL2 Inducing Lignin Accumulation in Superficial Scald ‘Chili’ (Pyrus bretschneideri) Pear Fruit
by Qian Li, Chenxia Cheng, Chunjian Zhang, Junxiu Xue, Yong Zhang, Caihong Wang, Ruihong Dang and Shaolan Yang
Agronomy 2022, 12(11), 2650; https://doi.org/10.3390/agronomy12112650 - 27 Oct 2022
Cited by 4 | Viewed by 1561
Abstract
Superficial scald of pear fruit is a physiological disorder that easily occurs during cold storage and seriously affects pear eating quality and commodity value. It is important to study the mechanism of superficial scald disorder. Our previous study reported that the incidence of [...] Read more.
Superficial scald of pear fruit is a physiological disorder that easily occurs during cold storage and seriously affects pear eating quality and commodity value. It is important to study the mechanism of superficial scald disorder. Our previous study reported that the incidence of superficial scald of calcium chloride (CaCl2)-treated pear fruit during storage was significantly lower than that of untreated fruit. In this study, we found that the accumulation of lignin in CaCl2-treated fruit was significantly lower than that of untreated fruit. The expression of the Pb4CL2 gene in the lignin synthesis pathway was downregulated in the CaCl2-treated fruit. The lignification level of the fruit overexpressing Pb4CL2 was significantly higher than that of the empty vector fruit. Therefore, we speculate that downregulation of Pb4CL2 after CaCl2 treatment plays an important role in CaCl2 inhibiting superficial scald disorder by affecting lignin accumulation in pear fruit. Full article
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21 pages, 3373 KiB  
Article
Transcriptome Analysis of ‘Kyoho’ Grapevine Leaves Identifies Heat Response Genes Involved in the Transcriptional Regulation of Photosynthesis and Abscisic Acid
by Rongrong Guo, Ling Lin, Guiyuan Huang, Xiaofang Shi, Rongfu Wei, Jiayu Han, Sihong Zhou, Ying Zhang, Taili Xie, Xianjin Bai and Xiongjun Cao
Agronomy 2022, 12(10), 2591; https://doi.org/10.3390/agronomy12102591 - 21 Oct 2022
Cited by 2 | Viewed by 2130
Abstract
Grapevine is a popular cultivated fruit throughout the world and heat stress is one of the most serious threats to viticulture. However, transcriptional responses, such as molecular properties of photosynthesis and abscisic acid biosynthesis, metabolism and signal transduction pathway of grapevine to heat [...] Read more.
Grapevine is a popular cultivated fruit throughout the world and heat stress is one of the most serious threats to viticulture. However, transcriptional responses, such as molecular properties of photosynthesis and abscisic acid biosynthesis, metabolism and signal transduction pathway of grapevine to heat stress, are still poorly understood. In this study, RNA-seq was carried out for thermostabilized grapevine ‘Kyoho’ leaves. Results showed that 685 and 469 genes were commonly down-regulated and up-regulated at three sampling time-points. The light-dependent reactions of photosynthesis was significantly enriched in up-regulated DEGs at 1 hpt and down-regulated DEGs at R24 hpt. Heat stress impaired the photosynthetic capacity of grapevine leaves, and there was a significant positive relationship between photosynthesis and stomatal conductance at short-term post-heat stress treatment, but the inhibition of HS on Pn was non-stomata limitation for a longer period. Photosystem (PS)Ⅱ was more sensitive to heat stress than PSⅠ, and PsbP, as well as Psb28, played important roles in response to heat stress. The abscisic acid (ABA) content in heat-stress-treated Kyoho plants was higher than that in the control at 1 hpt, but less in heat-stress-treated plants at 4 and R24 hpt, which was regulated by numerous genes involved in the ABA biosynthesis and catabolism pathways. These results help to understand the influence of heat stress on photosynthesis and ABA biosynthesis, metabolism and signal transduction pathway. Full article
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