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Updated: Jan 17, 2026

Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Dual regulation of thermotolerance and drought tolerance by LrWRKY16 through LrHSP17.2-mediated homeostasis and ROS
Peng Mei1, Shaokang Tang1, Qin Ling1
1College of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, China.
Abstract:
Lily is a famous ornamental flower all over the world. In the process of cultivation and production, it usually faces a variety of stresses that influence its growth. While small heat shock proteins (sHSPs) enhance stress tolerance in Lilium regale, their regulatory mechanisms remain poorly defined. Here, we identified LrWRKY16 as a novel transcriptional activator of LrHSP17.2 that conferred dual thermotolerance and drought tolerance, a functionally distinct role not previously characterized in lily. LrWRKY16 directly bound the LrHSP17.2 promoter, activating its expression to maintain cellular homeostasis and enhance ROS scavenging under stress. Overexpression of LrWRKY16 in Arabidopsis significantly elevated both heat and drought tolerance and upregulated stress-responsive genes. Critically, LrWRKY16 orchestrated a unique regulatory module with LrHSP17.2 to co-optimize protein protection and oxidative stress mitigation. Taken together, this study revealed the evidence of a WRKY-sHSP axis mediating dual abiotic stress adaptation in Lilium regale, providing a strategic target for molecular breeding of lily.
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