Li Haibo, Chen Wenfu, Li Quanying
College of Agronomy, Shenyang Agricultural University, China.
Ying Yong Sheng Tai Xue Bao. 2006 Sep;17(9):1588-92.
With rice varieties salt-tolerant Liaoyan 2 and salt-sensitive Akihikari as test materials, this paper determined their leaf net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductivity (Gs), and intercellular CO2 concentration (Ci) at different light intensities under long-term NaCl stress. The results showed that under NaCl stress, the Pn and Gs of the two varieties had an increase tendency with increasing light intensity, but in comparing with no NaCl stress, the Pn of Liaoyan 2 increased by 14.87%, while that of Akihikari decreased by 17.91%. The dynamic changes of Ci, Ls and Pn/Gs indicated that stomatal and non-stamatal factors played a positive role in the changes of Liaoyan 2 photosynthesis, while stomatal factor was the main reason inducing the changes of Akihikari photosynthesis.
以耐盐水稻品种辽盐2号和盐敏感水稻品种秋光为试验材料，测定了长期NaCl胁迫下不同光强下它们的叶片净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）和胞间CO₂浓度（Ci）。结果表明，在NaCl胁迫下，两个品种的Pn和Gs均随光强增加呈上升趋势，但与无NaCl胁迫相比，辽盐2号的Pn增加了14.87%，而秋光的Pn下降了17.91%。Ci、Ls和Pn/Gs的动态变化表明，气孔和非气孔因素对辽盐2号光合作用变化起积极作用，而气孔因素是诱导秋光光合作用变化的主要原因。
