Related Experiment Video
Updated: May 12, 2025

Use of Arabidopsis eceriferum Mutants to Explore Plant Cuticle Biosynthesis
Published on: May 31, 2008
CsRAP2-7 negatively regulates cuticular wax biosynthesis and drought resistance in citrus by directly activating
Xinyue Zhao1, Jingheng Xie1, Li Yang1
1Department of Pomology, College of Agronomy, Jiangxi Agricultural University, Nanchang, Jiangxi, 330045, China.
Abstract:
Cuticular wax plays an important role in enhancing plant stress tolerance. While positive regulators of cuticular wax biosynthesis are well-studied, negative regulators remain largely unexplored in citrus. In the present paper, we screened and cloned an AP2/ERF family gene, CsRAP2-7, from navel orange. This gene is localized to the nucleus and induced by drought and ABA treatments. Overexpression of CsRAP2-7 in lemon upregulates ethylene biosynthesis while concurrently inhibiting cuticular wax accumulation and reducing cuticular permeability, collectively leading to a marked decline in drought tolerance. CsRAP2-7 mediates its regulatory role by directly binding to the promoter of CsACO1, an ethylene biosynthetic gene, thereby activating its transcription. These results suggest that CsRAP2-7 play a negative role in regulating cuticular wax biosynthesis and drought resistance by directly mediating CsACO1 expression.
Related Concept Videos
Adaptations that Reduce Water Loss
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...
Introduction to Plant Diversity
Cell Signaling in Plants
Role of Microtubules in Cell Wall Deposition
Regulation of Transpiration by Stomata

