植物学报2013，Vol.48Issue(3)：313-319,7.DOI:10.3724/SP.J.1259.2013.00313
锶对油菜幼苗叶片光合作用的影响
Effect of Strontium on Photosynthesis of Leaves in Rape Seedlings
摘要
Abstract
Brassica napus (rape) seedlings were treated with different concentrations of strontium (1,5,10,20mmol·L-1SrCl2) for 21 days,and the effect of strontium on the photosynthesis of rape leaves was investigated by chlorophyll fluorescence induction dynamics and photosynthetic gas exchange parameters.Photosystem Ⅱ potential activity,actual photochemical efficiency,apparent photosynthetic electronic transfer rate,and photochemical quenching increased with low strontium concentration (1,5 mmol·L-1) but decreased with high concentration (10,20 mmol·L-1).Minimum fluorescence and non-photochemical quenching did not change significantly with low strontium concentration but significantly increased with high concentration.Net photosynthetic rate and transpiration rate of leaves significantly increased with low strontium concentration but decreased with high concentration; stomatal conductance significantly decreased with increasing strontium concentration; intercellular CO2 concentration increased with high concentration.Chlorophyll content significantly increased with low strontium concentration and decreased with high concentration.Thus,low strontium concentration could improve photosynthetic function of rape seedlings and increase photosynthetic efficiency,but a high concentration can harm the photosynthetic apparatus and significantly inhibit photosynthetic efficiency.关键词
叶绿素荧光/光合气体交换参数/油菜/锶Key words
chlorophyll fluorescence/ photosynthetic gas exchange parameters/ rape/ strontium引用本文复制引用
周璐璐,唐运来,陈霞,陈梅,王丹..锶对油菜幼苗叶片光合作用的影响[J].植物学报,2013,48(3):313-319,7.基金项目
四川省科技厅应用基础研究(No.2009JY0144)和国防重点基础研究(No.B3120110001) （No.2009JY0144）
