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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (5): 1033-1046.doi: 10.16420/j.issn.0513-353x.2023-0200

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Identification,Expression and Function Analysis of ALDH Gene Family in Lentinula edodes

CHEN Jiayue1, DUAN Yingming1, ZHOU Yan1, XIAO Yang1,3, BIAN Yinbing1,2,3, GONG Yuhua1,*()   

  1. 1 Institute of Applied Mycology,College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China
    2 Hubei Hongshan Laboratory,Wuhan 430070,China
    3 National Key Laboratory of Agricultural Microbiology,Wuhan 430070,China
  • Received:2024-01-19 Revised:2024-03-11 Online:2024-05-25 Published:2024-05-29

Abstract:

In this study,17,20,19,and 18 ALDH family members were identified in the four published genomes W1-26,NBRC111202,Bin0899,and B17 of Lentinula edodes,respectively. ALDH encoded proteins belong to 11 families,among which family 1 has the largest number of genes. These ALDH genes were distributed in 17,16,16,and 10 scaffolds of four genomes,respectively,and one or two pairs of tandem duplication ALDH genes were found except W1-26 genome. Only four pairs collinear ALDH genes existed between L. edodes and the model fungus Schizophyllum commune. The promoter regions of 17 ALDH genes in the W1-26 genome of L. edodes contained ten kinds of response elements such as light,hormone,oxygen and drought,among which the number of light response elements was significantly more than other elements. The transcriptome and proteome data showed that LeW1-26ALDH1N1,LeW1-26ALDH3L1 and LeW1-26ALDH6C1 had significant responses to different time periods of heat stress. Compared with wild-type S606 strain,LeW1-26ALDH3L1 gene RNAi transformant had 55% decrease of IAA content of mycelia after heat stress at 40 ℃ for 24 h,and had 71% and 45% decrease of mycelial regrowth rate and biomass separately at 25 ℃. These phenotypes of LeW1-26ALDH1N1 and LeW1-26ALDH6C1 gene RNAi transformants did not change compared with wild-type S606 strain. Above all,it is indicated that the decreased gene expression level of LeW1-26ALDH3L1 may lead to mycelia’s lower IAA content under heat stress,and then reduced the thermotolerance of mycelia.

Key words: Lentinula edodes, aldehyde dehydrogenase gene family, IAA biosynthesis, thermotolerance, genome-wide identification