Pepper SBP-box Transcription Factor, , Plays a Negatively Role in Drought Response

Overview

Journal Front Plant Sci

Date 2024 Jul 29

PMID 39070917

Authors

Huai-Xia Zhang

Yuan Zhang

Bo-Wen Zhang

Affiliations

Soon will be listed here.

Abstract

The SBP-box gene significantly influences plant growth, development, and stress responses, yet its function in pepper plants during drought stress remains unexplored. Using virus-induced gene silencing and overexpression strategies, we examined the role of during drought stress in plants. The results revealed that the expression of can be induced by drought stress. Silencing of in pepper notably boosted drought resistance, as evident by decreased active oxygen levels. Furthermore, the water loss rate, relative electrical conductivity, malondialdehyde content, and stomatal density were reduced in CaSBP13-silenced plants compared to controls. In contrast, overexpression in decreased drought tolerance with elevated reactive oxygen levels and stomatal density. Additionally, ABA signaling pathway genes (, ) exhibited reduced expression levels in CaSBP13-silenced plants post drought stress, as compared to control plants. On the contrary, and showed heightened expression in CaSBP13-sienced plants under the same conditions. However, a converse trend for , , and was observed post-four day drought in CaSBP13-overexpression plants. These findings suggest that negatively regulates drought tolerance in pepper, potentially via ROS and ABA signaling pathways.

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