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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (12): 2886-2894.doi: 10.16420/j.issn.0513-353x.2023-0955

• Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Study on the Regulation of Lactate Dehydrogenase on Mycelia Growth of Pleurotus ostreatus Under Low Temperature and Light

WU Baizeng1,2, JIANG Yuqing1, HE Qi1,3, HUANG Chenyang1, ZHANG Lijiao1, ZHAO Mengran1()   

  1. 1National Key Laboratory for Efficient Utilization of Arid and Semi-Arid Cultivated Land in North China,Key Laboratory of Microbial Resources Collection and Preservation,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China
    2College of Horticulture,Jilin Agriculture University,Changchun 130118,China
    3Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi,Jilin Agricultural University,Changchun 130118,China
  • Received:2024-09-10 Revised:2024-11-04 Online:2024-12-25 Published:2024-12-13
  • Contact: ZHAO Mengran

Abstract:

In order to study the effect of lactate dehydrogenase on mycelial growth of Pleurotus ostreatus under the environmental stimulation of low temperature and light,the expression profiles of lactate dehydrogenase were analyzed,and the influences of exogenous lactate dehydrogenase inhibitor,lactic acid,and pyruvic acid on the mycelial growth were observed. The results showed that lactate dehydrogenase could accelerate mycelial growth in 12 h of light alternated with 12 h of darkness at 15 ℃. Inhibition of lactate dehydrogenase enzyme activity would cause the activity of pyruvate dehydrogenase (PDH)to be decreased by 15.02%,which giving rise to the decreasing flux of pyruvic acid into the tricarboxylic acid cycle,the production of ATP reduced by 14.78%,and the intracellular contents of lactic acid and pyruvic acid increased by 18.97% and 12.57%,respectively. The accumulation of lactic acid and pyruvic acid could induce increased activities of alcohol dehydrogenase,which leading to the increase of NAD+ content and the imbalance of NADH/ NAD+ ratio,and therefore the inhibition of mycelial growth.

Key words: Pleurotus ostreatus, lactate dehydrogenase, lactate, glycometabolism, low temperature, light