Screening of Salt Tolerant Indexes for Rice Seedlings under Salinity Conditions of the Yellow River Delta
Xin Caiyun
Zhou Xuebiao
Liu Qihua
Xie Xianzhi
Zhao Qinglei
Wang Yu
Zhu Qisong
Chen Bocong
Wang Jia
Ma Jiaqing
Abstract：The saline alkali soil was collected from the Yellow River Delta.On the basis of analyzing the salt content of the above soils,the artificial soils were prepared by mixing high-and low-salt soils at different ratios.Nine morphological and physiological indexes related to saline-alkali tolerance were determined in 12 rice materials at the stage with two leaves and one shoot.The results showed that the plant height and dry matter accumulation of seedlings were inhibited at the salt concentration of 0.34％,and there were obvious differences in chlorophyll content,malondialdehyde content and antioxidant enzyme activities between different rice materials.The principal component analysis was carried out on the salt tolerance indexes,and two comprehensive indexes were extracted with the contribution rate as 55.588％ and 24.054％ respectively;their cumulative contribution rate was 79.642％.Haidao 86 had the greatest tolerance to salt,followed by Yanjing 218 and Nipponbare.The optimal regression equation was established through step regression analysis,and it showed that fresh weight,chlorophyll b content,superoxide dismutase activity,malondialdehyde content and plant height significantly influenced the saline tolerance of rice seedlings,so they could be as the indexes to identify the salt tolerance of rice seedlings.
Keywords：Saline soilRiceSaline tolerant indexesScreening
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 23-28 )