Plant growth-promoting endophytic fungi of the wild halophytic rice Oryza coarctata

作者：Arifa Akhter Airin, Md Iyasir Arafat, Rifat Ara Begum, Md. Rakibul Islam, Zeba I. Seraj · 发表于：Annals of Microbiology · 年份：2023 · DOI：10.1186/s13213-023-01738-3 · 被引用次数：36 · 研究领域：Plant-Microbe Interactions and Immunity、Plant Pathogens and Fungal Diseases、Fungal Biology and Applications

Abstract Background Plant growth-promoting endophytic fungi (PGPEF) that are associated with halophytes have the potential to boost crop salinity tolerance and productivity. This in turn has the potential of enabling and improving cultivation practices in coastal lands affected by salt stress. Methods Endophytic fungi from the wild halophytic rice Oryza coarctata were isolated, characterized, identified, and studied for their effects on all developing stages of rice plant growth and their yields both with and without salt stress. Key results In this study, three different fungal endophytes were isolated from the halophytic wild rice Oryza coarctata . Two isolates were identified as Talaromyces adpressus (OPCRE2) and Talaromyces argentinensis (OPCRh1) by ITS region sequencing. The remaining isolate NPCRE2 was confirmed as a novel strain named Aspergillus welwitschiae Oc streb1 ( AwOc streb1) by whole genome sequencing. These endophytes showed various plant growth-promoting (PGP) abilities in vitro (e.g., IAA, ACC-deaminase and siderophore production, phosphate, and zinc solubilization as well as nitrogen fixation), where AwOc streb1 was significantly more efficient compared to the other two isolates at high salinity (900 mm). Independent application of these fungi in commercial rice ( Oryza sativa ) showed significant elevation in plant growth, especially in the case of the AwOc streb1 inoculants, which had enhanced metabolite and chlorophyll content at the seedling stage in b...