Fungal symbiont Mycena complements impaired nitrogen utilization in Gastrodia elata and supplies indole-3-acetic acid to facilitate its seed germination.

ABSTRACT: Nitrogen and auxin uptake play pivotal roles in seed germination and development. Gastrodia elata, a fully mycoheterotrophic plant, depends entirely on its symbiotic association with Mycena for early growth and seed germination. The process by which Mycena supplies nitrogen nutrients and auxin, which are deficient in G. elata, remains poorly understood. In this study, genome-scale analysis of G. elata revealed the loss of genes associated with nitrogen utilization and indole-3-acetic acid (IAA) biosynthesis, which are retained in Mycena. Further analysis of the dynamic transcriptomic interactions between G. elata seeds and Mycena across different symbiotic stages revealed that genes involved in nitrogen- and tryptophan-dependent IAA biosynthesis were significantly upregulated in Mycena dur

SUBMITTER: Yuan QS 

PROVIDER: S-EPMC12546762 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature