广西植物2016，Vol.36Issue(3)：308-314,260,8.DOI:10.11931/guihaia.gxzw201404037
木麻黄浸提液对榄仁树幼苗生长及生理生化的影响
Effects of leachates from Casuarina equisetifolia on growth and physiological and biochemical characteristics of Terminalia catappa seedlings
摘要
Abstract
In this study, we tried to introduce Terminalia catappa into coastal Casuarina equisetifolia windbreak to form mixed forest as windbreak, so as to improve efficiency of wind sheltering and sand fixation and the regional ecological envi-ronment. We selected Terminalia catappa of seedling age of 15 d as experimental and irrigate allelochemicals of leachates of Casuarina equisetifolia of concentration of 125 g•L-1 from roots, rhizosphere soil and litter, and studied the effects of allel-opathy of C. equisetifolia on growth, photosynthesis, the damage of membrance system, antioxidant enzyme activity system and proline content of T. catappa seedlings in growing period of 60 d. The results showed that the leachates of roots, litter and rhizosphere soil reduced the survival rates and damaged seedlings of the beginning of the treatment, and significantly af-fected the plant height, leaves, roots biomass of Terminalia catappa seedlings. Therefore, we could deduce that influence plant growth by the composition of different leachates of Casuarina equisetifolia. All the three leachates significantly reduced the net photosynthesis(Pn), stomatal conductance(Ccond), inter cellular CO2 concentration(Ci),transpiration rate(Tr), but significantly increased the water use efficiency(WUE) of the seedlings after 15-45 d since the treatment beginning. No significant effect of leachates from C. equisetifolia on the leaf chlorophyll contents of Terminalia catappa seedling of treat-ment beginning, with the prolong of growth period, but the roots leachates of C. equisetifolia significantly reduced chloro-phyll content of seedling. The seedlings growth period of 60 d, all the three leachates significantly increased the cell mem-brane penetrability and proline content (Pro), but the roots leachate significantly increased the stomatal conductance, inter cellular CO2 concentration, superoxide dismutase in leaves and catalase in roots of T. catappa. The litter leachates increased the stomatal conductance and transpiration rate, and they also reduced peroxidase content. Therefore, seedlings by adjusting its physiological and biochemical designed to the allelopathy stress of leachates of Casuarina equisetifolia, which could be used as one of tree species of the construction of the coastal shelter forest.关键词
木麻黄浸提液/榄仁树幼苗/生长/生理生化特征Key words
leachates from Casuarina equisetifolia/Terminalia catappa seedling/growth/biochemical characteristics分类
农业科技引用本文复制引用
冯剑,刘强,王瑾,罗炘武,阮长林,张晓楠..木麻黄浸提液对榄仁树幼苗生长及生理生化的影响[J].广西植物,2016,36(3):308-314,260,8.基金项目
国家科技支撑计划项目(2012BAC18B04)@@@@[Supported by National Key Technology Research and Development Program of China (2012BAC18B04)]。 （2012BAC18B04）
