Root Remodeling Mechanisms and Salt Tolerance Trade-Offs: The Roles of HKT1, TMAC2, and TIP2;2 in Arabidopsis DOI Creative Commons
Nouf Owdah Alshareef, Vanessa Melino, Noha Saber

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Abstract Plant responses to salt stress involve complex processes integrating short- and long-term adaptations, including changes in ion transport, systemic signaling, root architecture, biomass distribution. A key adaptive mechanism involves the regulation of sodium (Na + ) potassium (K transport via Class 1 HKT1 transporters, which reduce Na accumulation shoots, thereby enhancing salinity tolerance but at expense lateral development. In this study, we identified differential roles TMAC2 modulating ABA development under two distinct Arabidopsis genotypes, Col-0 C24. Overexpression background increased accumulation, resulting reduced development, suggesting a positive feedback loop involving HKT1, TMAC2, signaling. contrast, overexpression C24 lines overexpressing indicating genotype-specific differences TMAC2-HKT1 interaction. Additionally, observed that co-expression induced ABI4 ABI5 transcription factors, are known mediate sensitivity. These findings reveal regulatory network where modulate through genotype-dependent mechanisms. Our results highlight complexity remodeling crucial role genetic shaping these responses.

Language: Английский

Emerging roles of auxin in plant abiotic stress tolerance DOI
Mohammad Salehin

Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(6)

Published: Nov. 1, 2024

Abstract Plants are continuously attacked by several biotic and abiotic factors. Among factors, heat, cold, drought, salinity common stresses. produce hormones as their main weapon in fightback against these hormones, the role of auxin is well established regulating plant growth development at various scales. However, recent literature, important stress tolerance has emerged. Several signalling transport mutants exhibit salinity‐related phenotypes. them, auxin‐mediated hypocotyl elongation root response to increased heat importance due continuous rise global temperature. Auxin also involved recruiting specialized metabolites like aliphatic glucosinolate defend themselves from drought stress. Aliphatic (A‐GLS) regulates guard cell closure using auxin, which independent major hormone abscisic acid. This regulatory mechanism serves an additional layer movement protect plants drought. Transferring pathway into non‐brassica such rice soybean holds promise improve tolerance. In addition these, post‐translational modification components redistribution efflux transporters playing roles salt and, hence, may be exploited breed drought‐tolerant crops. Also, reactive oxygen species, along with peptide signalling, under conclusion, we summarize discoveries that suggest

Language: Английский

Citations

2
Root Remodeling Mechanisms and Salt Tolerance Trade-Offs: The Roles of HKT1, TMAC2, and TIP2;2 in Arabidopsis DOI Creative Commons
Nouf Owdah Alshareef, Vanessa Melino, Noha Saber

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

Abstract Plant responses to salt stress involve complex processes integrating short- and long-term adaptations, including changes in ion transport, systemic signaling, root architecture, biomass distribution. A key adaptive mechanism involves the regulation of sodium (Na + ) potassium (K transport via Class 1 HKT1 transporters, which reduce Na accumulation shoots, thereby enhancing salinity tolerance but at expense lateral development. In this study, we identified differential roles TMAC2 modulating ABA development under two distinct Arabidopsis genotypes, Col-0 C24. Overexpression background increased accumulation, resulting reduced development, suggesting a positive feedback loop involving HKT1, TMAC2, signaling. contrast, overexpression C24 lines overexpressing indicating genotype-specific differences TMAC2-HKT1 interaction. Additionally, observed that co-expression induced ABI4 ABI5 transcription factors, are known mediate sensitivity. These findings reveal regulatory network where modulate through genotype-dependent mechanisms. Our results highlight complexity remodeling crucial role genetic shaping these responses.

Language: Английский

Citations

0