Combined use of arbuscular mycorrhizal fungus and selenium fertilizer shapes microbial community structure and enhances organic selenium accumulation in rice grain
Combined use of arbuscular mycorrhizal fungus and selenium fertilizer shapes microbial community structure and enhances organic selenium accumulation in rice grain
复制标题
DOI：
10.1016/j.scitotenv.2020.141166
复制
发表时间：
2020-12-15
影响因子：
9.8
通讯作者：
Wei, Yanyan
中科院分区：
文献类型：
--
作者：
Chen, Xue;Zhang, Zengyu;Wei, Yanyan
硒(Se)缺乏是一个公共卫生问题，其主要原因是从主要农作物中摄取的Se不足。本研究旨在研究接种不同丛枝菌根真菌(AMF)菌株(Funneliformis Mosseae(FM)和Giomus versiforme(GV))以及亚硒酸盐或亚硒酸盐施肥对水稻体内Se积累和形态的影响。结果表明，接种AM菌剂和施Se肥比单独施Se肥更能促进水稻籽粒有机Se的积累。此外，接种FM的水稻籽粒中硒的积累量最高，其中硒蛋氨酸是优势硒形态。接种丛枝菌根真菌还可提高土壤中有效硒的含量，提高土壤中微生物的相对丰度。土壤中有效态Se含量较高，说明接种AMF可能改变了微生物群落，进而导致水稻对Se的吸收增加，进而导致水稻体内有机Se积累量的增加。基于这些结果，接种AM真菌结合施Se肥是一种很有前途的水稻生物强化策略。(C)2020爱思唯尔B.V.保留所有权利。
Selenium (Se) deficiency is a public health concern that is mainly caused by inadequate intake of Se from staple crops. The purpose of this study is to investigate the effects of inoculation with different arbuscular mycorrhizal fungus (AMF) strains, including Funneliformis mosseae (Fm) and Giomus versiforme (Gv), and fertilization with selenite or selenate on the accumulation and speciation of Se in rice. The results showed that using both AMF inoculation and Se fertilization could promote organic Se accumulation in rice grain than using only Se fertilization. Moreover, grain of rice inoculated with Fm and grown in soil fertilized with selenate had the highest accumulation of Se, of which selenomethionine was the dominant Se species. The AMF inoculation also led to high content of available Se and high relative abundance of Firmicutes in soil. The high concentration of available Se in soil suggests that the AMF inoculation may modify the microbial community, which then causes the Se uptake of rice to increase, in turn causing the amount of organic Se accumulated in rice to increase. Based on these results, using AMF inoculation combined with Se fertilization can be a promising strategy for Se biofortification in rice. (C) 2020 Elsevier B.V. All rights reserved.