Transcriptomic Analysis Reveals Calcium and Ethylene Signaling Pathway Genes in Response to Cold Stress in <i>Cinnamomum camphora</i>
2024
Bo Bi | Lingmei Shao | Tong Xu | Hao Du | Danqing Li
<i>Cinnamomum camphora</i> is one of the most dominant broad-leaved evergreen trees in tropical and subtropical regions. Understanding its response to cold stress is crucial for enhancing its resilience to climate changes and expanding the cultivation range. Cold stress response is a vital strategy for plants to withstand cold stress, typically involving transcriptional changes across various pathways. In this study, RNA-Sequencing (RNA-Seq) was conducted on the leaves of <i>C. camphora</i> subjected to different cold stress treatments (0 h, 2 h, and 12 h). Transcriptome analyses revealed that short-term cold stress treatment rapidly induced the upregulation of genes associated with calcium and ethylene signaling pathways, including <i>GLR2.7</i>, <i>CaM</i>, <i>CPK7</i>, and <i>ERF1/3/4/5/7</i>. Subsequently, 12 h cold response treatment further activated genes related to the cold response, jasmonic acid signaling pathways, and the negative regulation of cellular biosynthetic processes, such as <i>CBF2</i> and <i>CBF4</i>. Notably, ERFs emerged as the most differentially expressed transcription factors in this study. A total of 133 ERF family members from <i>C. camphora</i> were identified through phylogenetic analysis, and these ERFs were classified into 12 clusters. Many of these ERFs are likely to play pivotal roles in the cold response of <i>C. camphora</i>, especially <i>ERF1/3/4/5/7</i>. These findings offer novel insights into the mechanisms underlying the cold response and present valuable candidates for further research, advancing our understanding of plant responses to cold stress.
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