Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato

Wang, Ying; Gai, Wen-Xian; Yuan, Liangdan; Shang, Lele; Li, Fangman; Gong, Zhong‐Liang; Ge, Pingfei; Wang, Yaru; Tao, Jinbao; Zhang, Xingyu; Dong, Haiqiang; Zhang, Yuyang

doi:10.1016/j.hpj.2022.12.006

Cited by 14 publications

(4 citation statements)

References 73 publications

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“…In pepper, CaWRKY40 has been associated with HS tolerance and its expression is regulated by SA, JA and ethylene ( Yang et al., 2022 ). In tomato, another member of the WRKY family, SlWRKY3 has been demonstrated to be a positive regulator of thermotolerance that activates the expression of a range of HS responsive genes involved in ROS scavenging ( Wang et al., 2023 ). The WRKY genes identified as up-regulated under HS in our analysis could contribute to HS tolerance and are good candidates for future functional validation studies.…”

Section: Discussionmentioning

confidence: 99%

Various tomato cultivars display contrasting morphological and molecular responses to a chronic heat stress

Bollier,

Micol-Ponce,

Dakdaki

et al. 2023

Front. Plant Sci.

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Climate change is one of the biggest threats that human society currently needs to face. Heat waves associated with global warming negatively affect plant growth and development and will increase in intensity and frequency in the coming years. Tomato is one of the most produced and consumed fruit in the world but remarkable yield losses occur every year due to the sensitivity of many cultivars to heat stress (HS). New insights into how tomato plants are responding to HS will contribute to the development of cultivars with high yields under harsh temperature conditions. In this study, the analysis of microsporogenesis and pollen germination rate of eleven tomato cultivars after exposure to a chronic HS revealed differences between genotypes. Pollen development was either delayed and/or desynchronized by HS depending on the cultivar considered. In addition, except for two, pollen germination was abolished by HS in all cultivars. The transcriptome of floral buds at two developmental stages (tetrad and pollen floral buds) of five cultivars revealed common and specific molecular responses implemented by tomato cultivars to cope with chronic HS. These data provide valuable insights into the diversity of the genetic response of floral buds from different cultivars to HS and may contribute to the development of future climate resilient tomato varieties.

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Section: Discussionmentioning

confidence: 99%

Various tomato cultivars display contrasting morphological and molecular responses to a chronic heat stress

Bollier,

Micol-Ponce,

Dakdaki

et al. 2023

Front. Plant Sci.

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“…Indeed, its downexpression comported a reduced accumulation and activity of Hsps and plant antioxidant enzymes, respectively, thus resulting in the high accumulation of ROS. Among the WRKY TFs, Wang et al (2022) identified the SlWRKY3 as positive regulator of HS response in tomato. Its over-expression led to an increased thermotolerance and decreased ROS accumulation.…”

Section: Other Classes Of Transcriptional Factorsmentioning

confidence: 99%

Tomato plant response to heat stress: a focus on candidate genes for yield-related traits

Graci,

Barone

2024

Front. Plant Sci.

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Climate change and global warming represent the main threats for many agricultural crops. Tomato is one of the most extensively grown and consumed horticultural products and can survive in a wide range of climatic conditions. However, high temperatures negatively affect both vegetative growth and reproductive processes, resulting in losses of yield and fruit quality traits. Researchers have employed different parameters to evaluate the heat stress tolerance, including evaluation of leaf- (stomatal conductance, net photosynthetic rate, Fv/Fm), flower- (inflorescence number, flower number, stigma exertion), pollen-related traits (pollen germination and viability, pollen tube growth) and fruit yield per plant. Moreover, several authors have gone even further, trying to understand the plants molecular response mechanisms to this stress. The present review focused on the tomato molecular response to heat stress during the reproductive stage, since the increase of temperatures above the optimum usually occurs late in the growing tomato season. Reproductive-related traits directly affects the final yield and are regulated by several genes such as transcriptional factors, heat shock proteins, genes related to flower, flowering, pollen and fruit set, and epigenetic mechanisms involving DNA methylation, histone modification, chromatin remodelling and non-coding RNAs. We provided a detailed list of these genes and their function under high temperature conditions in defining the final yield with the aim to summarize the recent findings and pose the attention on candidate genes that could prompt on the selection and constitution of new thermotolerant tomato plant genotypes able to face this abiotic challenge.

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“…Overexpression of SlWRKY3 accumulated less ROS, whereas wrky3 knockout lines accumulated more ROS under heat stress. They concluded that SlWRKY3 activated the expression of a range of abiotic stress-responsive genes involved in ROS scavenging [64]. Wu et al performed transcriptome analysis of lily (Lilium longiflorum) and identified the a WRKY family transcription factor gene LlWRKY22, which was activated for expression at high temperatures, and overexpression of LlWRKY22 in Lilium longiflorum increased heat tolerance and activated the expression of heat-related LlDREB2B genes, which play a positive role in the regulation of heat tolerance [65].…”

Section: Wrky Transcription Factors and High Temperature Stressmentioning

confidence: 99%

WRKY Transcription Factor Responses and Tolerance to Abiotic Stresses in Plants

Ma,

2024

Preprint

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Plants are subjected to abiotic stresses throughout their developmental period. Abiotic stresses include drought, salt, heat, cold, heavy metals, nutritional element and oxidative stresses. Improving plant response to various environmental stresses is critical for plant survival and perpetuation. The WRKY transcription factors have special structure (WRKY structural domains), which enable WRKY transcription factors to have different transcriptional regulatory functions. The WRKY transcription factors can not only regulate abiotic stresses response and plant growth and development by regulating phytohormone signalling pathways, but also promote or suppress the expression of downstream genes by binding to the W-box [TGACCA/TGACCT] in the promoters of their target genes. In addition, WRKY transcription factors not only interact with other families of transcription factors to regulate plant defence responses in abiotic stresses, but also self-regulate by recognizing and binding to W-boxes in their own target genes to regulate their defence responses to abiotic stresses. However, in recent years, research reviews on the regulatory roles of WRKY transcription factors in higher plants are scarce and shallow. In this review, we focus on the structure and classification of WRKY transcription factors, as well as the identification of their downstream target genes and molecular mechanisms involved in the response to abiotic stresses, which can improve the tolerance ability of plants in abiotic stress and we also look forward to their future research directions, with a view to providing theoretical support for the genetic improvement of crop abiotic stresses tolerance.

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Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato

Cited by 14 publications

References 73 publications

Various tomato cultivars display contrasting morphological and molecular responses to a chronic heat stress

Various tomato cultivars display contrasting morphological and molecular responses to a chronic heat stress

Tomato plant response to heat stress: a focus on candidate genes for yield-related traits

WRKY Transcription Factor Responses and Tolerance to Abiotic Stresses in Plants

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