摘要
以2个耐盐性不同的番茄品种为材料,研究了外源NO供体硝普钠(SNP)处理对100mmol·L-1NaCl胁迫下番茄幼苗生长和光合作用的影响。结果表明:外源NO能使盐胁迫下的番茄幼苗叶片叶绿素含量、净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)升高,胞间CO2浓度(Ci)下降,叶绿素荧光参数Fv/Fm、Fv/Fo和T1/2增高,脯氨酸和可溶性糖含量升高。可见,外源NO有利于番茄幼苗对光能的捕获和转换,促进番茄的生长,降低盐胁迫对番茄的抑制作用。
Two tomato varieties with different salt tolerances were employed to study the effect of exogenous sodium nitroprusside as nitric oxide donor on tomato seedlings in photosynthesis and growth under the stress resulting from 100 mmol· L^-1 NaCl. The results showed that exogenous nitric oxide could cause the tomato-seedling leaves to increase their chlorophyll content,net photosynthetic rate,stomatal conductance and transpiration rate ,reduce their intercellular carbon dioxide concentration, raise their chlorophyll Fv/Fm,Fv/Fo and T1/2,and proline and soluble sugar contents under NaCl stress. Obviously,exogenous nitric oxide was favorable for the seedlings to capture and converse solar energy thus improving tomato growth and abating the inhibitory effects of salt stress on tomato.
出处
《西北植物学报》
CAS
CSCD
北大核心
2006年第6期1206-1211,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
教育部高校博士点基金资助项目(20030307020)
江苏省科技厅资助项目(BC2003306
BE2002304)
教育部留学回国人员科研启动基金资助项目([2001]498)
