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Mechanism of salt tolerance in the endangered semi-mangrove plant Barringtonia racemosa: anatomical structure and photosynthetic and fluorescence characteristics

文献类型： 外文期刊

作者： Hu, Ju 1 ; Deng, Xu 1 ; Bai, Caihong 1 ; Li, Lin 1 ; Yang, Xiuling 1 ; Lan, Chunxiao 1 ; Zhong, Haiyan 1 ; Tan, Xiaohui 3 ; Liang, Fang 1 ;

作者机构： 1.Yulin Normal Univ, Coll Intelligent Agr, Yulin 537000, Peoples R China

2.Yulin Normal Univ, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Mt Biodivers Conservat, Yulin 537000, Peoples R China

3.Guangxi Acad Agr Sci, Guangxi Subtrop Crops Res Inst, Nanning 530001, Peoples R China

4.Guangxi Acad Agr Sci, Guangxi Subtrop Crops Res Inst, Key Lab Qual & Safety Control Subtrop Fruit & Vege, Minist Agr & Rural Affairs, Nanning 530001, Peoples R China

关键词： Photosynthesis; Fluorescence; Anatomical structure; Barringtonia racemosa; Salt stress

期刊名称：3 BIOTECH （ 影响因子：2.8； 五年影响因子：3.1 ）

ISSN： 2190-572X

年卷期： 2024 年 14 卷 4 期

页码：

收录情况： SCI

摘要： To elucidate the mechanisms governing the salt tolerance of the endangered semi-mangrove plant Barringtonia racemosa, the biomass, photosynthetic and fluorescent characteristics, and anatomical structure of B. racemosa were studied under low, medium and high salt stress. The results showed that the stem dry weight, net photosynthetic rate, intercellular CO2 concentration, Fv/Fm, and Phi PSI of B. racemosa decreased under high salt stress, which led to a significant reduction in total dry weight. Stem dry weight was significantly positively correlated with the thickness of palisade tissue and significantly negatively correlated with the thickness of the epidermis of roots and xylem of stems. Therefore, a stable net photosynthetic rate and intercellular CO2 concentration, an increase in Fv/Fm and Phi PSI, an increase in or stable palisade tissue and spongy mesophyll of leaves and an increase in xylem thickness of the stem and epidermis, outer cortex, and stele diameter of roots could contribute to the salt tolerance of B. racemosa.

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