短期高温对香蕉幼苗光合作用及相关生理指标的影响

本试验以巴西蕉幼苗为试材，研究经短期高温处理后叶片光合作用和几种生理指标的变化。结果表明，短期高温处理后，巴西蕉叶片净光合速率（Pn）、气孔导度（Gs）和蒸腾速率（Tr）相比对照有所下降，而细胞间隙CO2浓度（Ci）持续升高。高温处理24 h后，巴西蕉幼苗叶片叶绿素总量相比对照降低9.62%，而可溶性蛋白含量、游离脯氨酸含量（Pro）、MDA含量相比对照均有极显著的提高，可见短期高温胁迫对巴西蕉幼苗的生长产生了不利的影响。

Effects of Short-Term High Temperature on Photosynthesis and Related Physiological Indices in Brazil Banana Plantlets

The effects of short-term high temperature on the Brazil banana plantlets were used as material to study the changes of photosynthesis and physiological indices of the leaves.The results showed thatP n,G s and T r decreased than those of CK,whileC i increased all the time. The leaf of Brazil banana total chlorophyll content were lower than 9.62% of CK,while the soluble protein,free proline,MDA content were increased significantly than those of CK after 24 h. The results suggested that short-term high temperature might result in the bad effects on the growth of the brazil banana plantlets.