Growth status of tea plants under drought stress with and without the exogenous application of tea polyphenols. (IMAGE)
Caption
Growth status of tea plants under drought stress with and without the exogenous application of tea polyphenols. The proposed model illustrates the role of CsMYB77 in directly targeting CsPOD44 to enhance drought tolerance in tea plants. Tea polyphenols, secondary metabolites in the flavonoid pathway, can activate the phenylpropanoid biosynthetic signaling pathway, thereby increasing peroxidase (POD) activity within this pathway. This elevation in POD activity facilitates the scavenging of excessive reactive oxygen species (ROS), ultimately improving drought tolerance in tea plant roots. Additionally, this process may promote the accumulation of downstream phenylpropanoid products, contributing to ROS elimination. Further experimental verification is required to confirm this mechanism.
Credit
Horticulture Research
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CC BY