Hu Ju, Deng Xu, Bai Caihong, Li Lin, Yang Xiuling, Lan Chunxiao, Zhong Haiyan, Tan Xiaohui, Liang Fang
College of Intelligent Agriculture, Yulin Normal University, Yulin, 537000 China.
Key Laboratory of Mountain Biodiversity Conservation, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin, 537000 China.
3 Biotech. 2024 Apr;14(4):103. doi: 10.1007/s13205-024-03943-6. Epub 2024 Mar 8.
To elucidate the mechanisms governing the salt tolerance of the endangered semi-mangrove plant , the biomass, photosynthetic and fluorescent characteristics, and anatomical structure of were studied under low, medium and high salt stress. The results showed that the stem dry weight, net photosynthetic rate, intercellular CO concentration, Fv/Fm, and ΦPSI of 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 CO concentration, an increase in Fv/Fm and ΦPSI, 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 .
为阐明濒危半红树植物耐盐性的调控机制，研究了其在低、中、高盐胁迫下的生物量、光合与荧光特性及解剖结构。结果表明，在高盐胁迫下，该植物的茎干重、净光合速率、胞间CO₂浓度、Fv/Fm和ΦPSI均降低，导致总干重显著减少。茎干重与栅栏组织厚度显著正相关，与根表皮厚度和茎木质部厚度显著负相关。因此，稳定的净光合速率和胞间CO₂浓度、Fv/Fm和ΦPSI的增加、叶片栅栏组织和海绵组织的增加或稳定以及茎木质部厚度和根表皮、外皮层及中柱直径的增加，有助于该植物的耐盐性。
