镉胁迫对水稻生长发育的影响及伤流液与稻米镉含量的相关性研究

doi:10.19741/j.issn.1673-4831.2018.0104

Abstract

Abstract:

The effects of cadmium (Cd) stress on growth of rice and the correlation between the Cd in bleeding sap and rice were studied by considering the actual situation of Cd pollution in rice in China, which will provide data support and scientific guidance for the safety of rice production in Cd-contaminated areas. Effects of different Cd concentrations (0, 10, 50, 200, 500 and 1 000 μg·L^-1) on the growth of two rice varieties (Zhongjiazao No. 17 and Taiyou No. 390) and correlation between Cd content in different parts of rice and the brown rice were studied under nutrient solution culture condition. Results show that positive effect of Cd on rice growth was detected at the treatment with a Cd concentration of ≤ 10 μg·L^-1 and no significant difference (P>0.05) was found between the Cd-treated smples and the control. The growth of rice was inhibited at Cd concentration of >10 μg·L^-1 and the inhibitory effect was increased with the increase in Cd concentration. The Cd content in each part of rice was also increased with the increase in Cd concentration, and the change of Cd content in bleeding sap was consistent with that in each part of rice plant. Significant correlation (P<0.01) was detected between Cd content in the bleeding sap and brown rice. And the Cd content in the bleeding sap at tillering stage could be used to predict the degree of Cd contamination of rice.

Key words: Cd, rice, growth stage, hydroponics, bleeding sap

CLC Number:

PENG Ou, LI Dan-yang, LIU Shou-tao, LUO Hai-yan, WEI Xiang-dong, YE Chang-cheng, LIU Xiao-li, TIE Bai-qing, CHEN Wen-yan. Effects of Cadmium Stress on Rice Growth and Correlation Between Bleeding Sap and Cadmium Content in Rice[J]. Journal of Ecology and Rural Environment, 2019, 35(1): 76-82.

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Effects of Cadmium Stress on Rice Growth and Correlation Between Bleeding Sap and Cadmium Content in Rice

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