盐胁迫对果树光合生理的影响

结合我们相关的研究结果综述了盐胁迫对果树光合作用的影响。总体来说盐胁迫导致果树净光合速率下降,且这种作用受树种、品种、砧木以及盐的种类、浓度和处理时期的影响;盐胁迫还使叶片干物质积累下降并影响碳水化合物的组成。盐逆境所产生的渗透胁迫和离子毒害而引起的气孔性限制和非气孔性限制则是果树叶片净光合速率下降的原因。此外,盐胁迫使果树叶片的叶绿素荧光效率下降。文章最后还提了出今后研究果树盐胁迫与光合作用的关系应与实际的生产环境相结合。

A Review of Studies on Effect of Salt Stress on Photosynthesis in Fruit Crops

This review summarizes the effect of salt stress on photosynthesis of fruit crops.Generally speaking,the net photo-synthetic ratio under salt stress is declined,and affected by species,varieties,rootstocks of fruit crops and salt kinds,con-centration and suffered period.The dry mater accumulation is declining and carbohydrates component is changing under salt stress also.The reasons of net photosynthetic ratio decline were stomatal limit and non-stomatal limit resulting from osmotic stress and ionic poison under salt stress.The efficiency of chlorophyll fluorescence of fruit leaves was reduced under salinity.It is indicated that the study of photosynthesis of fruit crops under salt stress should be combined with the practical environ-ment.