Physiological Characteristics of Arbuscular Mycorrhizal Fungi in Alleviating Saline Alkali Stress in Rice
#Co-first author
Received date: 2022-10-27
Online published: 2023-05-23
To explore the effects of arbuscular mycorrhizal fungi (AMF) inoculation on the growth of different rice varieties under saline alkali stress, the pot culture was conducted in greenhouse to study the root mycorrhizal infection rate, growth characteristics, antioxidant system and osmoregulation responses between saline alkali tolerant rice variety Jinyuan 85 and sensitive rice variety Liaojing 763 under saline alkali and non saline alkali conditions with or without inoculating Rhizophagus intraradices. The results showed that salt alkali stress could significantly inhibit the growth of rice, and AMF inoculation could increase the plant height and dry weight, especially in Jinyuan 85. Moreover, the content of MDA and H2O2 in rice plants increased under saline alkali stress. After inoculation with AMF, the activities of SOD, POD, CAT and APX were significantly increased, while the content of H2O2 and MDA were significantly decreased. In addition, AMF could also alleviate osmotic stress by increasing proline, soluble sugar and soluble protein content of plants under stress. It can be seen that AMF can alleviate the inhibition of physiological growth activity caused by saline alkali stress to a certain extent, and improve the adaptability of rice to saline alkali stress by regulating antioxidant enzyme system and osmoregulation substances, and the effect of AMF on different varieties is not the same.
ZHANG Sihua, MI Chunxia, YU Yijun, LIU Guoqun, ZHU Chunquan, TIAN Wenhao, ZHU Lianfeng, CAO Xiaochuang, ZHANG Junhua, KONG Yali . Physiological Characteristics of Arbuscular Mycorrhizal Fungi in Alleviating Saline Alkali Stress in Rice[J]. China Rice, 2023 , 29(3) : 56 -61 . DOI: 10.3969/j.issn.1006-8082.2023.03.010
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