Article
Plant Sciences
Yakun Liu, Guifen Wu, Xingxing Ke, Zhifu Zheng, Yueping Zheng
Summary: This study reveals that the ATS1 gene negatively regulates salt resistance in Arabidopsis. Overexpression of ATS1 leads to decreased salt tolerance in terms of seed germination, biomass, chlorophyll content, pod development, and increased root/shoot ratio and anthocyanidin content. Mutations in the ATS1 gene result in higher levels of unsaturated fatty acids, which stabilize the plasma membrane under salt stress. The ats1 mutants also regulate ion homeostasis by upregulating K+ uptake and downregulating Na+ uptake genes.
Article
Plant Sciences
Xiang-yun Zhang, Ling-hui Tang, Jia-wei Nie, Chun-rui Zhang, Xiaonan Han, Qi-yu Li, Li Qin, Mei-hua Wang, Xiahe Huang, Feifei Yu, Min Su, Yingchun Wang, Rui-ming Xu, Yan Guo, Qi Xie, Yu-hang Chen
Summary: This study reveals the activation mechanism of SOS1 under salt stress by determining the different conformations of SOS1 in its auto-inhibited and active states using cryo-electron microscopy. The study proposes an inhibition-release mechanism for SOS1 activation and elucidates how SOS1 controls Na+ homeostasis in response to salt stress.
Article
Biochemistry & Molecular Biology
Feng Kong, Katrina M. Ramonell
Summary: The gene ATL12 plays an important role in the response to salt stress and abscisic acid (ABA) in Arabidopsis thaliana. Overexpression of ATL12 increases the expression of salt stress-associated genes and ABA-responsive genes, and leads to higher levels of reactive oxygen species. Mutants of atl12 are sensitive to salt stress and ABA, and have shorter root length. The findings suggest that ATL12 modulates the response to salt stress and is involved in the ABA signaling pathway.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Xinxin Tang, Lan Wu, Fanlong Wang, Wengang Tian, Xiaoming Hu, Shuangxia Jin, Huaguo Zhu
Summary: In this study, 14 putative S-adenosylmethionine decarboxylase genes were identified in upland cotton, and the ectopic expression of one of these genes in Arabidopsis thaliana resulted in enhanced salinity tolerance through increased spermidine accumulation and activation of salinity resistance-related genes.
DNA AND CELL BIOLOGY
(2021)
Article
Plant Sciences
Xu Chang, Guoqing Zhu, Shiya Chen, Dan Sun, Hao He, Guoliang Li, Yang Xu, Ziqi Ren, Chang Xu, Shumei Jin
Summary: AtPHB2 gene was cloned from Arabidopsis thaliana and localized in mitochondria, which was found to promote seed germination and plant growth under different stresses, and enhance resistance to saline-alkali and oxidative stresses. Transgenic plants overexpressing AtPHB2 showed higher K+/Na+ ratio and lower H2O2 content after 24 h of salt treatment, indicating its involvement in reducing reactive oxygen species (ROS) levels and improving plant tolerance to salt stresses.
PLANT GROWTH REGULATION
(2021)
Article
Plant Sciences
Lei Feng, Yan Li, Yu-Ling Zhou, Guang-Hua Meng, Zhao-Lin Ji, Wen-Hui Lin, Jun-Xian He
Summary: This study investigates the molecular mechanisms of plant responses to salt stress in salt cress. Phenotypic analysis, transcriptomic and proteomic profiling, and other assays were conducted to validate the role of BRs in regulating plant responses to salt stress. The results indicate that BES1 plays a positive role in plant salt tolerance.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Xin-Pei Lue, Kun-Zhong Shao, Jia-Yi Xu, Jia-Lue Li, Wei Ren, Jia Chen, Ling-Yu Zhao, Qi Zhao, Jin-Lin Zhang
Summary: In this study, a heat shock transcription factor gene, HaHSFA1, was cloned from Haloxylon ammodendron and overexpressed in Arabidopsis thaliana to investigate its effects on salt tolerance. The results showed that overexpression of HaHSFA1 increased chlorophyll content, promoted plant growth, increased soluble sugar and proline contents, enhanced antioxidant activity, improved root activity, and increased selective absorption and transport capacity for K+ over Na+. These findings suggest that HaHSFA1 has potential application in improving crop abiotic stress tolerance through genetic engineering.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Pramod Pantha, Dong-Ha Oh, David Longstreth, Maheshi Dassanayake
Summary: Research found that high potassium concentration in the growth medium leads to salinity stress in plants. Comparing Arabidopsis and its extremophyte relative Schrenkiella parvula, it was discovered that S. parvula can limit excess potassium accumulation while sustaining growth, by promoting nitrogen uptake and assimilation. On the other hand, Arabidopsis showed growth limitations due to poor balance between stress signaling, increased reactive oxygen species levels, and reduced photosynthesis. The ability to regulate nutrient uptake and coordinate transcriptomic responses are crucial for plants to survive high potassium-induced salinity stress.
Article
Plant Sciences
Ayesha Liaqat, Alamin Alfatih, Sami Ullah Jan, Liangqi Sun, Pingxia Zhao, Chengbin Xiang
Summary: The transcription elongation factor SPT4-2 positively regulates salt tolerance in Arabidopsis thaliana by maintaining ion homeostasis and regulating the expression of stress-responsive genes.
Article
Plant Sciences
Qiping Song, Min Zhou, Xipan Wang, Marian Brestic, Yang Liu, Xinghong Yang
Summary: In this study, a transcription factor called RAP2.6 was found to play an important role in the growth and response to salt stress in Arabidopsis. The mutant seedlings of RAP2.6 showed lower sensitivity to salt stress, with higher germination rate and longer root length. Moreover, the mutant plants exhibited higher accumulation of Na+ and lower expression of salt-related genes compared to the wild type.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Plant Sciences
Liangbo Fu, Dezhi Wu, Xincheng Zhang, Yunfeng Xu, Liuhui Kuang, Shengguan Cai, Guoping Zhang, Qiufang Shen
Summary: A barley vacuolar H+-pyrophosphatase (VP10) plays a critical role in developing salt tolerance by modulating Na+ sequestration into root vacuoles through synergistic action with Na+/H+ antiporters to enhance H+ efflux and K+ maintenance in roots.
Article
Plant Sciences
Xiangmei Jiao, Boqing Zhao, Baoshan Wang, Fang Yuan
Summary: In this study, an unknown gene, Lb1G04794, was identified, which showed increased expression after NaCl treatment and during salt gland development in Limonium bicolor. Overexpression of Lb1G04794 promoted salt gland development and improved salt tolerance in Arabidopsis.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Cheng Zhang, Chenchen Tong, Lei Cao, Pengpeng Zheng, Xiaofeng Tang, Lihuan Wang, Min Miao, Yongsheng Liu, Shuqing Cao
Summary: This research uncovered a novel regulatory cascade that significantly influences Cd tolerance in Arabidopsis. The WRKY33-ATL31-IRT1 module plays a crucial role in blocking Cd absorption and preventing metal toxicity. WRKY33 activates the transcription of ATL31, which in turn targets IRT1 for degradation in response to Cd stress.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Li Jiao Sun, Xiao Yu Zhao, Jing Ren, Shao Peng Yan, Xi Yang Zhao, Xing Shun Song
Summary: ChAOX2, isolated from Cerasus humilis, plays a crucial role in salt tolerance in plants. Its transcripts are abundant in old leaves, significantly up-regulated under salt stress, and localized in mitochondria. Overexpression of ChAOX2 increases proline content, peroxidase and superoxide dismutase activities, while reducing relative conductivity and reactive oxygen species levels, suggesting its importance in stress response.
Article
Plant Sciences
Hui Ma, Lingling Cai, Juncheng Lin, Kaiyue Zhou, Qingshun Q. Li
Summary: Salt tolerance is an important mechanism for plants to adapt to a saline environment. Through global analyses of mRNA alternative polyadenylation (APA), researchers found that Arabidopsis thaliana and its halophytic relative Eutrema salsugineum have different responses to salt stress. Arabidopsis is more sensitive to salt stress, while Eutrema exhibits an innate response to such conditions. The number of APA genes and the enriched pathways in response to salt stress also differ between the two species.
FRONTIERS IN PLANT SCIENCE
(2022)