Effects of salt stress on eco-physiological characteristics in Robinia pseudoacacia based on salt-soil rhizosphere

文献类型： 外文期刊

第一作者： Mao, Peili

作者： Mao, Peili;Zhang, Yujuan;Cao, Banghua;Guo, Longmei;Cao, Zhenyu;Jiang, Qiankun;Wang, Xuan;Shao, Hongbo;Shao, Hongbo

作者机构：

关键词： Salt tolerance;Biomass;Root morphology;Root physiology;Maximum net photosynthetic rate;Salt-soil

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

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收录情况： SCI

摘要： Robinia pseudoacacia is the main arbor species in the coastal saline-alkali area of the Yellow River Delta. Because most studies focus on the aboveground parts, detailed information regarding root functioning under salinity is scare. Root traits of seedlings of R. pseudoacacia including morphological, physiological and growth properties under four salinity levels (CK, 1 parts per thousand, 3 parts per thousand and 5 parts per thousand NaCl) were studied by the pot experiments to better understand their functions and relationships with the shoots. The results showed that seedling biomass decreased by the reduction of root, stem and leaf biomass with the increase of salinity levels. With increasing salinity levels, total root length (TRL) and total root surface area (TRSA) decreased, whereas specific root length (SRL) and specific root area (SRA) increased. Salt stress decreased root activity (RA) and the maximum net photosynthetic rate (Amax) and increased the water saturation deficit (WSD) significantly in the body. Correlation analyses showed significantly correlations between root morphological and physiologic-al parameters and seedling biomass and shoot physiological indexes. R. pseudoacacia seedlings could adapt to 1% salinity by regulating the root morphology and physiology, but failed in 5%. salinity. How to adjust the water status in the body with decreasing water uptake by roots was an important way for R. pseudoacctcict seedlings to adapt to the salt stress. (C) 2016 Published by Elsevier B.V.

分类号： X1

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