This invention discloses the application of the RlETC2
gene of
Rosa laevigata in inhibiting the formation of epidermal hairs in plants. Addressing the technical challenge of harvesting and
processing Rosa laevigata due to the presence of thorns and bristles on the stems, leaves, and fruits, this invention constructs the coding sequence of the RlETC2
gene into the vector pBI121, transforming it into
Arabidopsis thaliana to obtain overexpressing plants. Phenotypic
verification shows that the transgenic plants have significantly fewer above-ground epidermal hairs on leaves and stems than the
wild type, and significantly reduced
root hair length. Furthermore, the expression of endogenous epidermal hair negative regulators AtCPC, AtTRY, and AtETC1 is upregulated, while the expression of positive regulators AtGL1, AtGL3, and AtTTG1 is downregulated. In addition, this
gene can enhance the
scavenging capacity of
reactive oxygen species in
plant cells under drought and / or salt
stress conditions while inhibiting epidermal hair formation, significantly improving the seed
germination rate,
taproot length, and
plant survival rate of transgenic plants under
adverse conditions.