NaCl胁迫对嫁接茄子幼苗光合作用和离子含量的影响

摘要

Laboratory of Protected Horticultural Technology , Shanghai 201403 , China)rnThe greenhouse culture of grafted and self-root eggplant seedlings was carried out under 100 mmol/L NaCl stress. The results showed that the chlorophyll contents, net photosynthetic rates (Pn) ,stomatal conductances(Gs),intercellular CO2 concentrations(Ci)and transpiration rates(Tr) ,K + contents and K+ /Na+ ratios of all the seedlings were significantly decreased under NaCl stress,and all the above indices of the grafted seedlings were higher than those of the self-root seedlings;The Na + and Cl- contents of all the seedlings were significantly increased, but those of the grafted seedlings were lower than those of the self-root seedlings. The above results indicated that NaCl stress inhibited the photosynthesis of the seedlings but the salt tolerance of the grafted seedlings was higher than that of the self-root seedlings.%研究了100 mmol/L NaCl胁迫对茄子嫁接苗和自根苗的光合作用和离子含量的影响.结果表明:NaCl胁迫下,茄子嫁接苗和自根苗的叶绿素含量、净光合速率(Pn)、气孔导度(Gs)、胞间CO2浓度(Ci)和蒸腾速率(Tr)、K+含量、K+/Na+值均显著降低,嫁接苗以上指标均高于自根苗；Na+、Cl-含量均显著升高,嫁接苗的Na+、Cl-含量低于自根苗.以上结果表明:NaCl胁迫抑制了茄子幼苗光合作用,嫁接苗耐盐性优于自根苗.