Integrating Transcriptome and Metabolome Analysis Unveils the Browning Mechanism of Leaf Response to High Temperature Stress in Nicotiana tabacum
文献类型： 外文期刊
作者： Wang, Chunkai 1 ; Ding, Yongliang 2 ; He, Bing 3 ; Qiu, Mingsheng 1 ; Shen, Dongmei 1 ; Chen, Shuaiwei 1 ; Song, Wenjing 1 ; Qi, Weicong 3 ; Lv, Yuanda 3 ; Meng, Lin 1 ;
作者机构： 1.Chinese Acad Agr Sci CAAS, Tobacco Res Inst, Key Lab Tobacco Biol & Proc, Minist Agr, Qingdao 266101, Peoples R China
2.Tobacco Sci Inst Jiangxi Prov, Nanchang 330025, Peoples R China
3.Jiangsu Acad Agr Sci JAAS, Inst Germplasm Resources & Biotechnol, Nanjing 210014, Peoples R China
关键词： browning; flue-curing; transcriptome; metabolome; crop leaves
期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）
ISSN：
年卷期： 2024 年 14 卷 8 期
页码：
收录情况： SCI
摘要： During the process of flue-curing and processing, leaves from cash crops such as tea and tobacco frequently undergo a phenomenon of browning, leading to reduced quality and significant economic losses. Despite a variety of approaches developed to suppress browning, little is known about the role that flue-curing of postharvest leaves with stems plays in delaying browning. This study investigated the impact of leaf-with-stem (LWS) flue-curing on the browning of tobacco and its underlying mechanisms. Physiological results indicated that LWS flue-curing effectively delayed browning by enhancing antioxidant capacity and maintaining reactive oxygen species (ROS) levels during the yellowing stage. Comprehensive transcriptome and metabolome analyses showed that LWS flue-curing significantly influenced various metabolic pathways. Specifically, 196, 218, and 402 metabolites, and 65, 131, and 718 genes exhibited significant changes at the 38 degrees C, 40 degrees C, and 42 degrees C stages, respectively, inhibiting membrane lipid degradation and enhancing the supply of reducing hydrogen through the oxidative pentose-phosphate pathway. Additionally, hormone signaling pathways were found to be associated with LWS flue-curing. These findings highlight the complex interplay of metabolic pathways and signaling networks in attenuating browning, providing valuable insights for minimizing postharvest leaf browning during flue-curing and processing.
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