Cold stress in the harvest period: effects on tobacco leaf quality and curing characteristics

BMC Plant Biology

Folin Li¹  Wenyou Gao²  Daosheng Yang²  Ke Ren³  Binbin Hu³  Jiaen Su³  Xian He³  Yan Jin³  Kaiyuan Gu³  Yan Li³  Mengyang Hu³  Congming Zou³ 

[1] College of Tobacco Science, Yunnan Agricultural University, Kunming, Yunnan, People’s Republic of China;Dali Tobacco Monopoly Bureau of Yunnan Province, Dali, Yunnan, People’s Republic of China;Yunnan Academy of Tobacco Agricultural Sciences, Kunming, Yunnan, People’s Republic of China;

关键词: Flue-cured tobacco;    Abiotic stress;    Nitrogen metabolites;    Carbon metabolites;    Physiology and biochemistry;    Enzyme activity;   

DOI  :  10.1186/s12870-021-02895-w

来源: Springer

【 摘 要 】

BackgroundWeather change in high-altitude areas subjects mature tobacco (Nicotiana tabacum L.) to cold stress, which damages tobacco leaf yield and quality. A brupt diurnal temperature differences (the daily temperature dropping more than 20 °C) along with rainfall in tobacco-growing areas at an altitude above 2450 m, caused cold stress to field-grown tobacco.ResultsAfter the flue-cured tobacco suffered cold stress in the field, the surface color of tobacco leaves changed and obvious large browning areas were appeared, and the curing availability was extremely poor. Further research found the quality of fresh tobacco leaves, the content of key chemical components, and the production quality were greatly reduced by cold stress. We hypothesize that cold stress in high altitude environments destroyed the antioxidant enzyme system of mature flue-cured tobacco. Therefore, the quality of fresh tobacco leaves, the content of key chemical components, and the production quality were greatly reduced by cold stress.ConclusionThis study confirmed that cold stress in high-altitude tobacco areas was the main reason for the browning of tobacco leaves during the tobacco curing process. This adverse environment seriously damaged the quality of tobacco leaves, but can be mitigated by pay attention to the weather forecast and pick tobacco leaves in advance.

【 授权许可】

CC BY