盐胁迫下青钱柳叶片发育特征和保水能力的变化

以青钱柳3个种源为研究对象，在智能人工气候生长室内采用水培法探讨了不同盐浓度(NaCl质量分数分别为0.1%、0.3%和0.5%)处理对青钱柳幼苗叶气孔形态、发育特征和保水能力的影响。结果表明：NaCl胁迫引起细胞失水，导致叶片肉质化程度降低，贮水能力下降。同时，由于叶片失水，引起气孔开度变小；供试3个种源幼苗叶片保水能力强弱依次为安徽黄山、云南昆明、江西九江。综合分析表明，3个种源青钱柳幼苗的耐盐能力强弱依次为安徽黄山、云南昆明、江西九江。

Variation in leaf development characteristics and leaf water-holding ability of young Cylocarya paliurus seedlings under NaCI stress

The stoma morphology, leaf development characteristics and leaf water-holding ability of Cylocarya paliurus seedlings from three provenances were investigated after salt treatments. C. paliurus seedlings were treated with four lev-els (control, 0.1% NaCl, 0.3% NaCl and 0.5% NaCl ) in a hydroponic system in a phytotron. Results showed that under NaCl stress, water losing of mesophyll cells resulted in leaf carnification degree reduced and the ability of leaf sto-ring water declined. Furthermore, because of leaf losing water, stoma opening degree became small. The leaf water-holding ability of the three provenances of C. paliurus seedlings was in the order of Huangshan of Anhui Province, Kun-ming of Yunnan Province, Jiujiang of Jiangxi Province. Overall, the salt-tolerance of the three provenances was also the order of Huangshan of Anhui Province, Kunming of Yunnan Province, Jiujiang of Jiangxi Province, which could provide some references for the silviculture of C. paliurus plantations.