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

作　　者：王紫阳[1] 杨颖 华建峰[1] 施钦[1] 殷云龙[1] 於朝广[1] WANG Ziyang;YANG Ying;HUA Jianfeng;SHI Qin;YIN Yunlong;YU Chaoguang(Jiangsu Engineering Research Center for Taxodium Rich. Germplasm Innovation and Propagation, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China)

机构地区：[1]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

出　　处：《植物资源与环境学报》2020年第4期72-74,共3页Journal of Plant Resources and Environment

基　　金：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)。

摘　　要：中国东部沿海滩涂资源丰富,长江中下游地区有大量的碱性低洼湖滩地,这些地区土壤理化性状较差、植被覆盖率低、生态系统脆弱、生态和环境问题严峻[1-2],因此,选育耐碱树种具有重要意义。碱胁迫不仅对植物造成生长抑制[3]、离子毒害[4]、渗透胁迫[5]和活性氧伤害[4],还会产生高pH值胁迫[6]。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 

分 类 号：Q945.78[生物学—植物学] S791.01[农业科学—林木遗传育种]