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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (6): 1243-1254.doi: 10.16420/j.issn.0513-353x.2022-0546

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

Preliminary Study on the Mechanism of Signal Molecule H2O2 Regulating the Formation of Pleurotus ostreatus Cap Color

HOU Ludan1,3, YAN Kexing1, DONG Shuai1, LIU Xingyu1, CHANG Mingchang1,2, MENG Junlong1,2,*()   

  1. 1College of Food Science and Engineering,Shanxi Agricultural University,Taigu,Shanxi 030801,China
    2Shanxi Engineering Research Center of Edible Fungi,Taigu,Shanxi 030801,China
    3Shanxi Key Laboratory of Edible Fungi for Loess Plateau,Taigu,Shanxi 030801,China
  • Received:2022-12-15 Revised:2023-04-21 Online:2023-06-25 Published:2023-06-27
  • Contact: * (E-mail:mengjunlongseth@hotmail.com

Abstract:

By spraying H2O2 and its scavenger N,N'-dimethylthiourea(DMTU)externally,it was clarified that H2O2 can participate in regulating the formation of Pleurotus ostreatus cap color. Using the reported Agaricus bisporus as a reference,28 genes involved in the melanin synthesis pathways were identified through sequence alignment,and the effect of exogenous H2O2 on the relative expression of key enzyme genes in different pathways was analyzed by qPCR. The results showed that H2O2 signaling molecule can change the proportion of different types of melanin in P. ostreatus and affecting the color of the cap by regulating the expression of key enzyme genes in different melanin synthesis pathways. On the other hand,it can promote the high expression of copper transcription factor genes mac,copper transporter genes ctr and polyphenol oxidase gene ppo1,and finally affect the formation of cap color.

Key words: Pleurotus ostreatus, cap color, hydrogen peroxide, polyphenol oxidase, copper ion transport

CLC Number: