Synergy of arbuscular mycorrhizal symbiosis and exogenous Ca2+ benefits peanut (Arachis hypogaea L.) growth through the shared hormone and flavonoid pathway
文献类型： 外文期刊
作者： Cui, Li 1 ; Guo, Feng 1 ; Zhang, Jialei 1 ; Yang, Sha 1 ; Meng, JingJing 1 ; Geng, Yun 1 ; Li, Xinguo 1 ; Wan, Shubo 2 ;
作者机构： 1.Shandong Acad Agr Sci, Biotechnol Res Ctr, Jinan 250100, Shandong, Peoples R China
2.Minist Agr, Sci Observing & Expt Stn Crop Cultivat East China, Jinan 250100, Shandong, Peoples R China
3.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Shandong, Peoples R China
4.Shandong Acad Agr Sci, Jinan 250100, Shandong, Peoples R China
5.Key Lab Crop Genet Improvement & Ecol Physiol Sha, Jinan 250100, Shandong, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： Peanut yield is severely affected by exchangeable calcium ion (Ca2+) deficiency in the soil. Arbuscular mycorrhizal (AM) symbiosis increases the absorption of Ca2+ for host plants. Here, we analyzed the physiological and transcriptional changes in the roots of Arachis hypogaea L. colonized by Funneliformis mosseae under Ca-2+-deficient and-sufficient conditions. The results showed that exogenous Ca2+ application increased arbuscular mycorrhizal fungi (AMF) colonization, plant dry weight, and Ca content of AM plants. Simultaneously, transcriptome analysis showed that Ca2+ application further induced 74.5% of differentially expressed gene transcripts in roots of AM peanut seedlings. These genes are involved in AM symbiosis development, hormone biosynthesis and signal transduction, and carotenoid and flavonoid biosynthesis. The transcripts of AM-specific marker genes in AM plants with Ca2+ deprivation were further up-regulated by Ca2+ application. Gibberellic acid (GA3) and flavonoid contents were higher in roots of AM- and Ca2+-treated plants, but salicylic acid (SA) and carotenoid contents specifically increased in roots of the AM plants. Thus, these results suggest that the synergy of AM symbiosis and Ca2+ improves plant growth due to the shared GA- and flavonoid-mediated pathway, whereas SA and carotenoid biosynthesis in peanut roots are specific to AM symbiosis.
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