摘要
通过夏季高温环境下彩叶北美海棠‘紫宝石’、‘王族’和绿叶北美海棠‘亚当’的生长情况、生理生化、光合气体交换参数及光响应曲线的研究,探索3种北美海棠对高温环境的响应策略并初步探讨其与绿叶北美海棠对夏季高温环境的适应性差异。结果表明,彩叶北美海棠与绿叶北美海棠在夏季高温环境下均能通过维持细胞膜的热稳定性、降低活性氧积累、增加渗透调节物质含量、提高光合速率与叶片内部水分利用效率的方式来适应高温环境,耐热性由高到低表现为‘紫宝石’、‘亚当’和‘王族’。该研究结果可为南方高温地区彩叶北美海棠的引种驯化、栽培育种以及耐热机理的研究提供依据。
By studying the growth,physiological and biochemical characteristics,photosynthetic gas exchange parameters and light response curves of colored-leaved north American Begonia‘Purple Gems’,‘Royal’and green-leaved north American Begonia‘Adam’under high temperature environment,the response strategies of colored-leaved north American Begonia to high temperature environment were explored,and the differences between colored-leaf north American Begonia and green-leaved north American Begonia in adaptability to high temperature environment were discussed.The results showed that both colored-leaved and green-leaved north American Begonia could adapt to high temperature environment by maintaining the thermal stability of cell membranes,reducing the accumulation of reactive oxygen species,increasing the content of osmotic regulators,increasing photosynthetic rate and water use efficiency of leaves.Their heat tolerance was in the order of‘Purple Gems’>‘Adam’>‘"Royal’.The results of this study can provide a basis for the introduction,domestication,cultivation and breeding,and the study of heat tolerance mechanism of north American Begonia in high temperature areas.
作者
何梅
胡玉安
王涛
许军
曾文昌
赵安
HE Mei;HU Yu-an;WANG Tao;XU Jun;ZENG Wen-chang;ZHAO An(Key Laboratory of Poyang Lake Wetland and Watershed Research,Ministry of Education,School of Geography and Environmental Sciences,Jiangxi Normal University,Nanchang 330022,China;Jiangxi Academy of Forestry,Nanchang 330022,China;Institute of Botany,Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen),Nanjing 210014,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2019年第4期664-672,共9页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(31300572)
江西省科技厅重点研发项目(20161BBF60116)
江西省林业科学院重点项目(2016511402)~~
关键词
彩叶北美海棠
高温环境
生理响应
colored-leaved north American Begonia
high temperature
physiological response
