Overexpression of PtrPYL11 enhance drought tolerance in Populus: evidence from genome-wide identification and
Shuang-Lian Deng1, Shu-Ying Wei1, Rui-Quan Wang1
1Forest Ecology and Conservation in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, Sichuan Mt. Emei Forest Ecosystem National Observation and Research Station, College of Forestry, Sichuan Agricultural University, Chengdu, 611130, China.
Abstract:
PYL receptor proteins are essential for enhancing plant resilience to extreme environments; however, their functions in woody plants-particularly in response to osmotic stress-remain poorly understood. In this study, we identified and comprehensively characterized 14 PYL genes in Populus trichocarpa. PtrPYL11, a core member, showed up-regulation following both ABA and dehydration treatments, suggesting that it may act as a positive regulator of osmotic stress responses by mediating the expression of ABA-related genes. Specifically, PtrPYL11-overexpressing poplar lines exhibited stronger osmotic stress tolerance than the wild type. Transcriptome analysis revealed that PtrPYL11 may indirectly regulate the expression of core transcription factors such as DOF1 and TCP9, mediating the ABA-signaling pathway in poplar. This study systematically characterizes the molecular features of the PtrPYL gene family and clarifies the role of PtrPYL11 in poplar osmotic stress responses. These findings not only lay a foundation for further exploration of its biological functions but also provide valuable genetic resources for breeding drought-tolerant forest tree varieties through genetic engineering.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
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