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Front Plant Sci


Title:Enhanced Iron Uptake in Plants by Volatile Emissions of Rahnella aquatilis JZ-GX1
Author(s):Kong WL; Wang YH; Wu XQ;
Address:"Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, China. Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing, China"
Journal Title:Front Plant Sci
Year:2021
Volume:20210730
Issue:
Page Number:704000 -
DOI: 10.3389/fpls.2021.704000
ISSN/ISBN:1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking)
Abstract:"Iron deficiency in soil has crucially restricted agricultural and forestry production. Volatile organic compounds (VOCs) produced by beneficial microorganisms have been proven to play an important role in inducing abiotic stress tolerance in plants. We investigated the effects of VOCs released by the rhizobacterium Rahnella aquatilis JZ-GX1 on the growth and root parameters of Arabidopsis thaliana under iron deficiency. The effect of the rhizobacterial VOCs on the gene expression in iron uptake and hormone signaling pathways were detected by RT-qPCR. Finally, the VOCs of the JZ-GX1 strain that could promote plant growth under iron deficiency stress were screened. The results showed that the JZ-GX1 strain could induce A. thaliana tolerance to iron deficiency stress by promoting the development of lateral roots and root hairs and increasing the activities of H(+) ATPase and Fe(3+) reductase. In addition, the AHA2, FRO2, and IRT1 genes of A. thaliana exposed to JZ-GX1-emitted VOCs were upregulated 25-, 1. 81-, and 1.35-fold, respectively, and expression of the abscisic acid (ABA) synthesis gene NCED3 was upregulated on both the 3rd and 5th days. Organic compounds were analyzed in the headspace of JZ-GX1 cultures, 2-undecanone and 3-methyl-1-butanol were found to promote Medicago sativa and A. thaliana growth under iron-limited conditions. These results demonstrated that the VOCs of R. aquatilis JZ-GX1 have good potential in promoting iron absorption in plants"
Keywords:Aba Arabidopsis thaliana Medicago sativa Rahnella aquatilis iron deficiency volatile organic compounds;
Notes:"PubMed-not-MEDLINEKong, Wei-Liang Wang, Ya-Hui Wu, Xiao-Qin eng Switzerland 2021/08/17 Front Plant Sci. 2021 Jul 30; 12:704000. doi: 10.3389/fpls.2021.704000. eCollection 2021"

 
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