Emerging Roles of Salicylic Acid in Plant Saline Stress Tolerance

Yang, Wei; Zhou, Zhou; Zhang, Chu

doi:10.3390/ijms24043388

Cited by 33 publications

(21 citation statements)

References 127 publications

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“…8a and b ), is responsible for producing the majority of SA in Arabidopsis (Wildermuth et al, 2001). As SA plays a pivotal role in orchestrating the plant’s response to biotic and abiotic stress (Yang et al, 2023), it can affect PCD responses. For instance, elevated levels of SA were observed in lesion-mimic mutants and can trigger hypersensitive response (HR) and PCD (Radojičić et al, 2018), potentially serving as a strategy to restrict the proliferation of pathogens during infection (Brodersen et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Transcript profiling ofplastid ferrochelatase twomutants reveals that chloroplast singlet oxygen signals lead to global changes in RNA profiles and are mediated by Plant U-Box 4

Rai,

Lemke,

Arias

et al. 2024

Preprint

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In response to environmental stress, chloroplasts generate reactive oxygen species, including singlet oxygen (1O2), which regulates nuclear gene expression (retrograde signaling), chloroplast turnover, and programmed cell death (PCD). Yet, the central signaling mechanisms and downstream responses remain poorly understood. The Arabidopsis thaliana plastid ferrochelatase two (fc2) mutant conditionally accumulates 1O2 and involves Plant U-Box 4 (PUB4), a cytoplasmic E3 ubiquitin ligase, in propagating these signals. To gain insights into 1O2 signaling pathways, we compared transcriptomes of fc2 and fc2 pub4 mutants. The accumulation of 1O2 in fc2 plants broadly repressed genes involved in chloroplast function and photosynthesis, while 1O2 induced genes and transcription factors involved in abiotic and biotic stress, the biosynthesis of jasmonic acid (JA), and Salicylic acid (SA). Elevated JA and SA levels were observed in stressed fc2 plants, but were not responsible for PCD. pub4 reversed the majority of 1O2-induced gene expression in fc2 and reduced the JA content, but maintained elevated levels of SA even in the absence of 1O2 stress. Reducing SA levels in fc2 pub4 restored 1O2 signaling and light sensitivity. Together, this work demonstrates that SA plays a protective role during photo-oxidative stress and that PUB4 mediates 1O2 signaling by modulating its levels.

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Section: Discussionmentioning

confidence: 99%

Transcript profiling ofplastid ferrochelatase twomutants reveals that chloroplast singlet oxygen signals lead to global changes in RNA profiles and are mediated by Plant U-Box 4

Rai,

Lemke,

Arias

et al. 2024

Preprint

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“…SA promotes plant stress resistance by regulating photosynthesis and proline and nitrogen metabolism and stimulating the oxidation resistance system [ 95 ]. SA has been proven to decrease K outflow and Na afflux, thereby maintain ion balance and saline–alkaline resistance [ 95 ].…”

Section: Discussionmentioning

confidence: 99%

High Concentrations of Se Inhibited the Growth of Rice Seedlings

Liu,

Ma,

et al. 2024

Plants

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Selenium (Se) is crucial for both plants and humans, with plants acting as the main source for human Se intake. In plants, moderate Se enhances growth and increases stress resistance, whereas excessive Se leads to toxicity. The physiological mechanisms by which Se influences rice seedlings’ growth are poorly understood and require additional research. In order to study the effects of selenium stress on rice seedlings, plant phenotype analysis, root scanning, metal ion content determination, physiological response index determination, hormone level determination, quantitative PCR (qPCR), and other methods were used. Our findings indicated that sodium selenite had dual effects on rice seedling growth under hydroponic conditions. At low concentrations, Se treatment promotes rice seedling growth by enhancing biomass, root length, and antioxidant capacity. Conversely, high concentrations of sodium selenite impair and damage rice, as evidenced by leaf yellowing, reduced chlorophyll content, decreased biomass, and stunted growth. Elevated Se levels also significantly affect antioxidase activities and the levels of proline, malondialdehyde, metal ions, and various phytohormones and selenium metabolism, ion transport, and antioxidant genes in rice. The adverse effects of high Se concentrations may directly disrupt protein synthesis or indirectly induce oxidative stress by altering the absorption and synthesis of other compounds. This study aims to elucidate the physiological responses of rice to Se toxicity stress and lay the groundwork for the development of Se-enriched rice varieties.

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“…cytoplasmic membrane and electrolyte extravasation, which in turn affects the photosynthesis, physiological metabolism, and other growth and development processes of plants and eventually causes different degrees of salt damage to the plants (Zhao et al, 2021). GABA, SA, and BR are important plant life activity regulators as they can resist the accumulation of toxic substances by regulating the antioxidant enzyme activity in plants (Li et al, 2021;Zhao et al, 2021;Yang et al, 2023). In this experiment, the effects of exogenous regulators GABA, SA, and BR on the antioxidant activity of grape leaves under saline stress were also investigated.…”

Section: Discussionmentioning

confidence: 99%

Effects of exogenous plant regulators on growth and development of “Kyoho” grape under salt alkali stress

Zhao,

Li,

Shi

et al. 2023

Front. Plant Sci.

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Salinity is one of the major abiotic stresses besides drought and cold stress. The application of plant growth regulators (PGRs) is an effective method to mitigate yield losses caused by salinity. However, we investigated the effects of exogenous regulatory substances (γ-aminobutyric acid (GABA), salicylic acid (SA), and brassinolide (BR) on the growth and development of “Kyoho” grapevine under salt stress. The results showed that exogenous regulators GABA, SA, and BR alleviated the inhibition of grape growth by saline stress and regulated the effects of salinity stress on grape fruit development and quality. All three regulators significantly increased fruit set, cross-sectional diameter, weight per unit, and anthocyanin content. In conclusion, this study provides a theoretical basis for grape production practices by using exogenous aminobutyric acid (GABA), salicylic acid (SA), and brassinolide (BR) to mitigate the hazards of salinity stress.

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Emerging Roles of Salicylic Acid in Plant Saline Stress Tolerance

Cited by 33 publications

References 127 publications

Transcript profiling ofplastid ferrochelatase twomutants reveals that chloroplast singlet oxygen signals lead to global changes in RNA profiles and are mediated by Plant U-Box 4

Transcript profiling ofplastid ferrochelatase twomutants reveals that chloroplast singlet oxygen signals lead to global changes in RNA profiles and are mediated by Plant U-Box 4

High Concentrations of Se Inhibited the Growth of Rice Seedlings

Effects of exogenous plant regulators on growth and development of “Kyoho” grape under salt alkali stress

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