Transcript profiling provides insights into molecular processes during shoot elongation in temperature-sensitive...

Area of Science:

• Plant Biology
• Genomics
• Molecular Biology

Background:

• Plant growth, especially shoot internode elongation, is influenced by ambient temperature.
• A complex transcriptional network is believed to regulate temperature-dependent plant growth.

Purpose of the Study:

• To investigate the molecular mechanisms of shoot internode elongation in temperature-sensitive peach (Prunus persica) at elevated temperatures.
• To identify genes and pathways involved in temperature-mediated plant growth.

Main Methods:

• Comparative RNA-sequencing (RNA-seq) analysis of peach tissues at different growth stages and temperatures.
• Analysis of differentially expressed genes (DEGs) related to temperature response and growth.

Main Results:

• A positive correlation was found between terminal internode length (TIL) and maximum temperature.
• Heat shock factors (HSFs) and heat shock proteins (HSPs) were differentially expressed, potentially influencing hormone signaling.
• Genes related to auxin, abscisic acid, jasmonic acid, ethylene, and salicylic acid pathways showed altered expression.
• Upregulation of aquaporins, expansins, pectinesterases, and endoglucanase genes suggests promotion of cell elongation.

Conclusions:

• Elevated temperatures significantly impact peach shoot elongation through complex transcriptional regulation.
• Specific hormone signaling pathways and cell wall-modifying enzymes are key players in temperature-induced growth.
• This study provides a foundation for understanding and potentially manipulating plant growth under changing thermal conditions.