2021年4月23日 星期五
碱处理对‘中山杉406’幼苗叶片光合特性和生理的影响
Effect of alkali treatment on photosynthetic characteristics and physiology of leaves of Taxodium ‘Zhongshanshan 406’ seedlings
2020年 第29卷 第4期 页码[72-74]
Abstract

The effects of alkali solution 〔n(Na2CO3)∶n(NaHCO3)=1∶1〕 treatments with different concentrations of 0 (CK), 20, 60, 100, 140, and 180 mmol·L-1 on photosynthetic characteristics and physiology of leaves of Taxodium ‘Zhongshanshan 406’ seedlings were studied by pot method. The results show that with enhancing of alkali concentration, chlorophyll content and stomatal conductance of leaves of T. ‘Zhongshanshan 406’ seedlings first decrease and then tend to be stable, net photosynthetic rate, transpiration rate, and intercellular CO2 concentration generally decrease gradually, water use efficiency increases gradually, soluble sugar and soluble protein contents increase in fluctuation, and superoxide dismutase activity first increases and then decreases. In general, compared with CK group, chlorophyll content, net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO2 concentration decrease significantly, and water use efficiency, soluble sugar and soluble protein contents, and superoxide dismutase activity increase significantly. In summary, alkali treatment can inhibit the photosynthesis of leaves of T. ‘Zhongshanshan 406’ seedlings to a certain extent, and under 20-100 mmol·L-1 alkali treatment, T. ‘Zhongshanshan 406’ can accumulate soluble sugar and soluble protein and improve superoxide dismutase activity to adapt to alkali stress environment.

关键词中山杉406’; 碱胁迫; 光合特性; 生理
Key wordsTaxodium ‘Zhongshanshan 406’; alkali stress; photosynthetic characteristics; physiology
作者王紫阳, 杨颖, 华建峰, 施钦, 殷云龙, 於朝广
所在单位江苏省中国科学院植物研究所(南京中山植物园) 江苏省落羽杉属树木种质创新与繁育工程研究中心, 江苏 南京210014
点击量383
基金项目江苏省现代农业重点研发计划(BE2018390); 中国科学院战略生物资源服务网络项目(kfj-brsn-2018-6-003)