摘要
以6年生"绿宝"苹果为试材,用CI-340光合仪(美国)测定其光合指标,以了解"绿宝"苹果的光合特性。结果表明:净光合速率(Pn)季节变化呈双峰曲线,9月为最高峰,6月为次高峰;Pn日变化呈单峰曲线,10:00—11:00的Pn最高为24μmol·m-2·s-1;光补偿点和饱和点分别为44.363、1 978.074μmol·m-2·s-1,表观量子效率(AQY)为0.038 7;CO2补偿点和饱和点分别为184.58、1 528.58μmol/mol,羧化效率(CE)为0.093 6。影响"绿宝"苹果净光合速率的主成分有3个,分别为气孔导度(C)因子、有效光合辐射(PAR)因子和叶绿素(Chl)含量因子。试验表明,"绿宝"苹果具有较高的光合能力。
With 6-year-old‘Bramley＇apple as research material,CI-340 photosynthesis equipment was used to measure photosynthetic characters in order to understand the photosynthetic characters of‘Bramley＇apple.The results showed that two peaks appeared in the curve of seasonal variation of Pn of‘Bramely＇,the highest peak occurred in September,and the second peak occurred in the June.The diurnal variation curve of Pn appeared to be a single-peaked curve and kept the highest level at 10：00—11：00 Am（Pn 24μmol·m^-2·s^-1）.Some other important photosynthetic indicators including light compensation point（LCP）and saturation point（LSP）,CO2 compensation point（CCP）and saturation point（CSP）,apparent quantum yield（AQY）and carboxylation efficiency（CE）,which were 44.363μmol· m^-2·s^-1,1 978.074μmol·m^-2·s^-1,184.58μmol/mol,1 528.58μmol/mol,0.038 7and 0.093 6respectively.The Pn of‘Bramley＇apple was mainly influenced by 3principal factors which were stomatal conductance（C）,photosynthetic active radiation（PAR）and chlorophyll content（Chl）.It concluded that‘Bramley＇apple;had high photosynthetic characters.
出处
《北方园艺》
CAS
北大核心
2015年第18期17-21,共5页
Northern Horticulture
基金
天津市科委2014年基础与前沿技术研究计划资助项目(14JCYBJC30200)
天津市农委资助项目(201101120)
关键词
“绿宝”苹果
光合特性
季节
日变化
生理生态因子
主成分
‘Bramley＇apple
photosynthetic characters
season
diurnal variation
eco-physiological factor
principal component
