Article
Plant Sciences
YanLing Yin, TianHui Yang, Shuang Li, Xiaoning Li, Wei Wang, ShuGao Fan
Summary: In this study, the researchers investigated the effect of methyl jasmonate (MeJA) on salt tolerance in alfalfa plants. The results showed that exogenous MeJA could enhance salt tolerance by regulating seed germination, root growth, and antioxidant capacity. Transcriptomic analysis revealed changes in gene expression related to secondary metabolism, redox regulation, cell cycle, transcription factors, and other signal transductions. Additionally, the researchers identified hub genes that were highly correlated with antioxidant enzymes activity and ion content.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Hang Yin, Zhaoyu Wang, Han Li, Yu Zhang, Mei Yang, Guowen Cui, Pan Zhang
Summary: In recent years, drought stress caused by global warming has become a major constraint on agriculture. This study extracted MsTHI1 from alfalfa and demonstrated its beneficial impact on improving the resistance of plants to stress conditions. MsTHI1 enhances drought tolerance by strengthening photosynthesis, regulating the antioxidant defense system, maintaining osmotic homeostasis, and mediating plant signal transduction.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Jiali Li, Maosen Ma, Yanmei Sun, Ping Lu, Haifan Shi, Zhenfei Guo, Haifeng Zhu
Summary: This study investigated the physiological and transcriptomic responses of two alfalfa cultivars to salinity stress. The results showed that Magnum Salt exhibited higher salt tolerance than Adrenalin, and this difference in tolerance could be attributed to the regulation of ionic homeostasis, antioxidative enzymes, and fatty acid metabolism.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Mengtong Dai, Risheng Huang, Yiyang Han, Ziyi Zhang, Yiyi Chen, Haifan Shi, Zhenfei Guo
Summary: PvHAK16 plays a role in Na+ uptake and K+ efflux under salt stress, leading to a higher Na+/K+ ratio and altered expression levels of ion homeostasis genes in transgenic plants. The transgenic plants showed reduced stress responsive gene expression and increased oxidative damage due to decreased SOD activity and proline accumulation in response to salt stress.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Plant Sciences
Yanmei Sun, Jie Li, Jincheng Xing, Xiao Yu, Yiwen Lu, Wenkai Xu, Na Zhao, Zhipeng Liu, Zhenfei Guo
Summary: This study evaluated salt tolerance in common vetch collections and investigated the underlying physiological mechanisms. The results showed that salt-tolerant collections of common vetch maintained lower levels of Na+ and higher levels of K+ and K+/Na+ ratio under salt stress compared to salt-sensitive ones. The expression of genes involved in Na+ and K+ transportation and redistribution was responsible for salt stress. Transcript levels of NHX7, HKT1, AKT2, and HAK17 were induced after salt stress, with higher levels in salt-tolerant collections. Proline accumulation and antioxidant defense system were also promoted in salt-tolerant collection. These findings suggest that salt tolerance in common vetch is associated with the maintenance of ion homeostasis, gene expression, proline accumulation, and antioxidant defense system.
JOURNAL OF PLANT PHYSIOLOGY
(2022)
Article
Plant Sciences
Mingyuan Zhu, Qiuxia Li, Yushi Zhang, Mingcai Zhang, Zhaohu Li
Summary: Improving crop salt tolerance is crucial for meeting future food demands in the face of climate change. This study reveals that glycine betaine (GB) plays a critical role in enhancing maize salt tolerance by regulating plant Na+ homeostasis. Treatment with GB significantly improved the growth of maize plants under non-stressed and salinity-stressed conditions, maintained chlorophyll fluorescence properties, and increased antioxidant enzyme activity. GB reduced Na+ accumulation in plants primarily through increasing Na+ efflux and decreasing Na+/K+ ratio. The study also found that GB enhances PM H+-ATPases gene transcription and protein activities, contributing to improved maize salt tolerance.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Mohamed S. Sheteiwy, Farwa Basit, Ali El-Keblawy, Izabela Josko, Saghir Abbas, Haishui Yang, Shereen Magdy Korany, Emad A. Alsherif, Mona F. A. Dawood, Hamada AbdElgawad
Summary: This study explored the mechanisms by which elevated CO2 (eCO2) alleviates the harmful effects of beryllium (Be) stress on plants. It was found that eCO2 mitigated the growth inhibition and oxidative stress induced by Be stress. The mitigating impact of eCO2 was more pronounced in alfalfa than in oats.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Biochemistry & Molecular Biology
Shichao Gu, Muhammad Abid, Danfeng Bai, Chen Chen, Leiming Sun, Xiujuan Qi, Yunpeng Zhong, Jinbao Fang
Summary: In this study, 42 CIPK genes were identified from Actinidia.valvata, and AvCIPK11 was highly expressed under salt stress. Overexpression of AvCIPK11 in 'Hongyang' kiwifruit enhanced salt tolerance by maintaining K+/Na+ homeostasis in the leaf and improving POD activity. This study suggests that AvCIPK11 plays a positive regulatory role in salt tolerance in kiwifruit.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Plant Sciences
Huan Guo, Yannong Cui, Zhen Li, Chunya Nie, Yuefei Xu, Tianming Hu
Summary: This study investigated the effects of NaCl treatments on buffalograss and found that it can maintain high photosynthetic capacity, water balance, and K+/Na+ homeostasis under salt stress. The plant retained a large amount of Na+ in roots and increased leaf K+ concentration to restrict Na+ overaccumulation in shoots. Key genes related to chlorophyll synthesis, photosynthetic electron transport, and K+ uptake were upregulated under NaCl treatments.
Article
Plant Sciences
Hongsheng Gao, Lunzeng Huang, Zijian Gong, Xueting Wang, Xuqiang Qiao, Fang Xiao, Yuting Yang, Bohui Yu, Xiaotong Guo, Chunyan Yu, Hongxia Zhang
Summary: Exogenous application of melatonin improves tobacco plant tolerance to high manganese stress by scavenging reactive oxygen species and regulating ion homeostasis.
PLANT GROWTH REGULATION
(2022)
Article
Plant Sciences
Lidia Lopez-Serrano, Angeles Calatayud, Salvador Lopez-Galarza, Ramon Serrano, Eduardo Bueso
Summary: In this study, tolerant and sensitive pepper accessions were subjected to salt stress, and transcriptomic analysis revealed differential genetic changes and physiological responses. The tolerant accession A25 showed improved growth, ion homeostasis, photosynthetic protection, and increased antioxidant activity under salt stress, primarily regulated by ABA signaling. The decrease in osmotic potential and misregulation of stress signaling genes also played important roles in the defense response to salinity in pepper A25 plants.
Article
Multidisciplinary Sciences
Tengzhao Song, Yiyuan Shi, Like Shen, Chengjuan Cao, Yue Shen, Wen Jing, Quanxiang Tian, Feng Lin, Wenyu Li, Wenhua Zhang
Summary: The study identified a cytochrome b(5) located in the endoplasmic reticulum that interacted with a high-affinity K+ transporter on the plasma membrane in rice, enhancing K+ uptake and improving salt tolerance. This posttranslational regulatory mechanism highlighted the coordinated action of two proteins in response to salt stress.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Plant Sciences
Cui Li, Luis A. J. Mur, Qinghai Wang, Xincun Hou, Chunqiao Zhao, Zhimin Chen, Juying Wu, Qiang Guo
Summary: The halophyte Karelinia caspia has not only fodder and medical value but also can remediate saline-alkali soils. Our study revealed that K. caspia utilizes salt-secreting by salt glands as its main adaptive strategy under high salinity. We further investigated the physio-biochemical responses and gene expression associated with ROS scavenging and ions transport in K. caspia under high salinity. The results showed enhanced antioxidant activity and nonenzymatic antioxidants content, as well as up-regulated expression of related genes, indicating that ROS scavenging and ion homeostasis are important for the high salt tolerance in K. caspia.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Jun Wang, Chenxu Cai, Puze Geng, Feng Tan, Qing Yang, Ren Wang, Wenbiao Shen
Summary: The study provides the first evidence that argon gas can help plants cope with salinity toxicity by reestablishing ion and redox homeostasis.
Article
Plant Sciences
Lei Liu, Pengfei Zhang, Guozhong Feng, Wenfeng Hou, Tianhao Liu, Zhijia Gai, Yanhui Shen, Xin Qiu, Xiangnan Li
Summary: The physiological mechanisms involved in xanthine metabolism during salt priming for improving low-temperature tolerance were studied. Salt priming promoted the growth of sugar beet leaves and increased the maximum quantum efficiency of PS II. However, the treatment with either xanthine dehydrogenase inhibitor (XOI) or exogenous allantoin (EA) alone increased the content of reactive oxygen species (ROS) in the leaves under low-temperature stress. Xanthine metabolism modulated ROS metabolism, photosynthetic carbon assimilation, and carbohydrate metabolism, thus enhancing low-temperature tolerance in sugar beet.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)