Genetic modification of Gγ subunit AT1 enhances salt-alkali tolerance in main graminaceous crops

Sun, Wei; Zhang, Huili; Yang, Sen; Liu, Lijing; Xie, Peng; Li, Jian; Zhu, Yu; Ouyang, Yidan; Xie, Qi; Zhang, Huawei; Yu, Feifei

doi:10.1093/nsr/nwad075

Cited by 15 publications

(12 citation statements)

References 12 publications

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“…qAT11 is a QTL associated with rice alkaline stress tolerance; however, the candidate gene for qAT11 has yet to be genetically validated (Li et al, 2020b). A recent study identified Alkaline tolerance 1 (SbAT1) as a QTL regulating sorghum (Sorghum bicolor L. Moench) alkaline tolerance through GWAS, showing that orthologous genes of SbAT1 in rice, maize, millet, and wheat also negatively regulate alkaline tolerance (Sun et al, 2023;Zhang et al, 2023a). OsAT1 has been identified as a high-yield gene (known as Grain Size 3, OsGS3) encoding an atypical G protein γ subunit (Mao et al, 2010).…”

Section: Natural Variations Associated With Rice Salt Tolerancementioning

confidence: 99%

Designing salt stress‐resilient crops: Current progress and future challenges

Liang,

Li,

Yang

et al. 2024

JIPB

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Excess soil salinity affects large regions of land and is a major hindrance to crop production worldwide. Therefore, understanding the molecular mechanisms of plant salt tolerance has scientific importance and practical significance. In recent decades, studies have characterized hundreds of genes associated with plant responses to salt stress in different plant species. These studies have substantially advanced our molecular and genetic understanding of salt tolerance in plants and have introduced an era of molecular design breeding of salt‐tolerant crops. This review summarizes our current knowledge of plant salt tolerance, emphasizing advances in elucidating the molecular mechanisms of osmotic stress tolerance, salt ion transport and compartmentalization, oxidative stress tolerance, alkaline stress tolerance, and the trade‐off between growth and salt tolerance. We also examine recent advances in understanding natural variation in the salt tolerance of crops and discuss possible strategies and challenges for designing salt stress–resilient crops. We focus on the model plant Arabidopsis (Arabidopsis thaliana) and the four most‐studied crops: rice (Oryza sativa), wheat (Triticum aestivum), maize (Zea mays), and soybean (Glycine max).This article is protected by copyright. All rights reserved.

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Section: Natural Variations Associated With Rice Salt Tolerancementioning

confidence: 99%

Designing salt stress‐resilient crops: Current progress and future challenges

Liang,

Li,

Yang

et al. 2024

JIPB

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“…Although research on plant salt tolerance has achieved fruitful results (Van Zelm et al, 2020; Zhao et al, 2020; Wang et al, 2022), the mechanism of plant alkali tolerance is still poorly understood. For instance, there are more than 22,600 research papers on salt tolerance in crops, but only 400 papers are on alkali tolerance (Wenjing et al, 2023). So why is there such a large study gap between “salt tolerance” and “alkali resistance”?…”

Section: Figurementioning

confidence: 99%

A genetic solution for the global food security crisis

Sahu¹,

Liu

2023

JIPB

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“…Under saline–alkaline conditions, Ca 2+ binding ZmNSA1 (Na + content under saline–alkaline condition) increases the transcription of plasma memrane-H + -ATPases ( MHA s) and promotes Na + efflux mediated by the Na + /H + antiporter SOS1 in maize [ 8 ]. The Gγ subunit AT1 (Alkaline Tolerance 1) negatively modulates the phosphorylation of PIP2 aquaporins and reduces the H 2 O 2 export activity of PIP2s, leading to the over-accumulation of H 2 O 2 and resulting in alkaline stress sensitivity in sorghum, millet, rice, maize, and wheat [ 9 , 10 ]. SCaBP3/CBL7 decodes alkaline-mediated Ca 2+ signaling and releases SCaBP3 inhibition on activities of PM-H + -ATPase AHA2 against alkali stress in Arabidopsis [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

A natural variation in SlSCaBP8 promoter contributes to the loss of saline–alkaline tolerance during tomato improvement

Liu,

Zhang,

Sun

et al. 2024

Horticulture Research

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Saline-alkaline stress is a worldwide problem that threatens the growth and yield of crops. However, how crops adapt to saline-alkaline stress remains less studied. Here we show that the saline-alkaline tolerance was compromised during tomato domestication and improvement, and a natural variation in promoter of SlSCaBP8, an EF-hand Ca2+ binding protein, contributes to the loss of saline-alkaline tolerance during tomato improvement. The biochemical and genetic data showed that SlSCaBP8 is a positive regulator of saline-alkaline tolerance in tomato. The introgression-line Pi-75, derived from a cross between wild Solanum pimpinellifolium LA1589 and cultivar E6203, containing the SlSCaBP8LA1589 locus, showed stronger saline-alkaline tolerance than E6203. Pi-75 and LA1589 also showed enhanced saline-alkaline-induced SlSCaBP8 expression than that of E6203. By sequence analysis, a natural variation was found in promoter of SlSCaBP8 and the accessions with the wild haplotype showed enhanced saline-alkaline tolerance, compared with the cultivar haplotype. Our studies clarify the mechanism of saline-alkaline tolerance conferred by SlSCaBP8 and provide an important natural variation in promoter of SlSCaBP8 for tomato breeding.

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Genetic modification of Gγ subunit AT1 enhances salt-alkali tolerance in main graminaceous crops

Cited by 15 publications

References 12 publications

Designing salt stress‐resilient crops: Current progress and future challenges

Designing salt stress‐resilient crops: Current progress and future challenges

A genetic solution for the global food security crisis

A natural variation in SlSCaBP8 promoter contributes to the loss of saline–alkaline tolerance during tomato improvement

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