摘要
以1年生红皮花桑为材料,采用盆栽的方法,研究了不同水分条件下条墩桑幼苗的生物量、荧光参数、净光合速率、气孔导度、蒸腾速率及水分利用效率的变化.结果表明:随着干旱胁迫程度的增加,植株地上部分的生物量和总生物量逐渐降低,但光合产物向根部的分配比例逐渐增大,根冠比逐渐增加;叶片的荧光参数Fo、Fv和Fv/Fm逐渐降低;气孔导度、蒸腾速率、净光合速率和水分利用效率逐渐下降.
One-year-old Morus alba seedlings were cultivated in pots containing soil with different water contents to study the biomass,chlorophyll fluorescence parameters,net photosynthesis rate,stomatal conductance,transpiration rate and water use efficiency of the seedlings in response to diverse water stress.The results showed that the aboveground biomass and total biomass decreased with increasing water stress.However,more photosynthetic products were transferred to the roots in relation to the aboveground parts to make the root-shoot ratio increase.The fluorescence parameters,such as Fo,Fv and Fv/Fm,and stomatal conductance,transpiration rate and water use efficiency decreased with increasing water stress.
出处
《应用生态学报》
CAS
CSCD
北大核心
2011年第12期3365-3370,共6页
Chinese Journal of Applied Ecology
基金
河北省林木种质资源与森林保护重点实验室项目(2009008)
河北省自然科学基金项目(2007204041)
河北省林业局项目(200806072)资助
关键词
条墩桑
干旱胁迫
生物量分配
光合特性
Morus alba
drought stress
biomass distribution
photosynthetic characteristics.
