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International Journal of Biological Macromolecules

International Journal of Biological Macromolecules

IF: 7.7
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Association of haloacid dehydrogenase and alcohol dehydrogenase with vegetative growth, virulence and stress tolerance during tea plant infection by Didymella?…

Published:4 December 2024 DOI: 10.1016/j.ijbiomac.2024.138388 PMID: 39643170
Dongxue Li,?Di Guo,?Fenghua Liu,?Yafeng Ren,?Delu Wang,?Jing-Jiang Zhou,?Baoan Song,?Zhuo Chen

Abstract

Tea leaf spot, caused by the fungus Didymella segeticola, occurs in the high-mountain tea plantations of Southwest China. Due to a limited understanding of the disease's epidemiology and the lack of comprehensive control measures, it has a significant negative impact on tea yield and quality. In this study, we revealed that D. segeticola infection begins when conidia germinate to form a germ tube on the leaf surface. The fungus then grows in the intercellular spaces of the leaf epidermal cells, invading tea tissue and causing necrotic lesions. This infection leads to significant alterations in the cell walls of spongy and palisade mesophyll cells, severely damaging chloroplasts. We employed transcriptomic and metabolomic analyses based on an in vitro infection model using matcha powder to uncover two key genes of D. segeticola: DsHAD (encoding holoacid dehydrogenase) and DsADH (encoding alcohol dehydrogenase). These genes are associated with conidiation, virulence, and sensitivity to oxidative stress. DsHAD regulates the virulence of D. segeticola by modulating glutamate homeostasis. Our results elucidate the infection strategy of D. segeticola on tea leaves and provide valuable data for future research on control measures for tea leaf spot.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium dodecyl sulfate 151-21-3 C12H25NaO4S 1118 suppliers $6.00-$3140.00
Sorbitol 50-70-4 C6H14O6 830 suppliers $5.00-$2150.00
Congo Red 573-58-0 C32H22N6Na2O6S2 452 suppliers $6.00-$700.00

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