Characteristics and Functions of Volatile Organic Compounds in the Tripartite Symbiotic System of HPDA25

Overview

Journal Plant Signal Behav

Specialty Biology

Date 2024 Sep 4

PMID 39231270

Authors

Ying Zhang

Tianrui Liu

Tiegui Nan

Zhongyi Hua

Yuyang Zhao

Yuan Yuan

Affiliations

Soon will be listed here.

Abstract

Tripartite interactions among plants, fungi, and bacteria are critical for maintaining plant growth and fitness, and volatile organic compounds (VOCs) play a significant role in these interactions. However, the functions of VOCs within the niche of mycoheterotrophic plants, which represent unique types of interactions, remain poorly understood. , a mycoheterotrophic orchid species, forms a symbiotic relationship with specific species, serving as a model system to investigate this intriguing issue. HPDA25 is a plant growth-promoting bacteria isolated from , which has been found to facilitate the establishment of symbiosis. In this study, using the tripartite symbiotic system of HPDA25, we investigate the role of VOCs in the interaction among mycoheterotrophic plants, fungi, and bacteria. Our results showed that 33 VOCs of HPDA25-inducible symbiotic elevated compared to non-symbiotic , indicating that VOCs indeed play a role in the symbiotic process. Among these, 21 VOCs were accessible, and six active VOCs showed complete growth inhibition activities against , while HPDA25 had no significant effect. In addition, three key genes of have been identified that may contribute to the increased concentration of six active VOCs. These results revealed for the first time the VOCs profile of and demonstrated its regulatory role in the tripartite symbiotic system involving , , and bacteria.

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