生态环境学报Issue(11)：1752-1758,7.
盐雾胁迫对榄仁幼苗生长及体内矿质元素分布的影响
Effects of Salt Spray on Growth and Compartmental Allocation of Mineral Element of Terminalia catappa Seedlings
摘要
Abstract
In order to understanding the mechanism of salt damage on halophyte Terminalia catappa seedlings, the seedlings were treated with NaCl in greenhouse by leaf spray, then their growth rate, and the allocation of mineral elements and ash in the different age and parts of the leaf were measured, which may guide the salt damage diagnosis and prevention measures in practical work, provide a basis for screening the salt tolerance species and constructing the coastal shelter forest. The results showed that the growth rate of leaf, stem and root of Terminalia catappa seedling treated by salt spray was slower than that of control group. There was no significant difference on the distribution of K+in the different parts of the leaf. Ca2+and Mg2+, and Na+and Cl-mostly distributed in the center part of leaves and at the edge of leaf, respectively. Moreover, the mass fraction of Na+and Cl-was significantly increased (P<0.05). Therefore, the salinity mainly distributed on the leaf tip and leaf edge after salt spray, which coincided with the symptom of lesions distributed mostly on the leaf tip and leaf edge of Terminalia catappa seedling. The mass fraction of ash of Terminalia catappa seedling mainly distributed in the center part of leaves after salt spray and increased with salt spray time. The order of mass fraction of ash was old leaves>mature leaves>new leaves. Furthermore, the mass fraction of ash in the different age and parts of the leaf treated by salt spray was significantly higher than that of control group (P<0.05). So the accumulation of ash in the plant increased with the treatment of salt spray. K+, Na+and Cl-, Ca2+, and Mg2+on Terminalia catappa seedling mainly distributed on the new leaves, the old leaves, and the mature leaves, separately showing that the new leaves were the most sensitive to salt. A significantly positive correlation between Na+ and Cl- was found in the plant with the treatment of salt spray in spite of the distribution of mineral elements in the different age and parts of the leaf, and the alteration of mass fraction of mineral elements (P<0.01).关键词
盐雾胁迫/盐生植物/榄仁/离子分布Key words
salt spray/halophyte/Terminalia catappa/ion distribution分类
农业科技引用本文复制引用
卞阿娜,林鸣,王文卿..盐雾胁迫对榄仁幼苗生长及体内矿质元素分布的影响[J].生态环境学报,2014,(11):1752-1758,7.基金项目
林业科技支撑计划资助项目（(2009BADA2B0605)；福建省科技重点项目（2013N01010365）；闽南师范大学创新团队 （2009BADA2B0605）
