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Magnesium application improves the morphology, nutrients uptake, photosynthetic traits, and quality of tobacco (Nicotiana tabacum L.) under cold stress

文献类型： 外文期刊

作者： Li, Jian 1 ; Muneer, Muhammad Atif 1 ; Sun, Aihua 1 ; Guo, Qinyu 1 ; Wang, Yuemin 2 ; Huang, Zhenrui 3 ; Li, Wenqing 2 ; Zheng, Chaoyuan 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Int Magnesium Inst, Coll Resources & Environm, Fuzhou, Peoples R China

2.Fujian Prov Tobacco Monopoly Bur, Inst Tobacco Sci, Fuzhou, Peoples R China

3.Guangdong Acad Agr Sci, Crops Res Inst, Guangdong Prov Key Lab Crop Genet & Improvement, Guangzhou, Peoples R China

关键词： low temperature; magnesium; growth; nutrients uptake; quality; photosynthesis; tobacco

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Cold stress is one of the major constraints limiting the productivity of many important crops, including tobacco (Nicotiana tabacum L.) production and quality worldwide. However, the role of magnesium (Mg) nutrition in plants has been frequently overlooked, especially under cold stress, and Mg deficiency adversely affects plant growth and development. Here, we evaluated the influence of Mg under cold stress on tobacco morphology, nutrient uptake, photosynthetic and quality attributes. The tobacco plants were grown under different levels of cold stress, i.e., 8 degrees C, 12 degrees C, 16 degrees C, including with a controlled temperature of 25 degrees C, and evaluated their effects with Mg (+Mg) and without Mg (-Mg) application. Cold stress resulted in reduced plant growth. However, the +Mg alleviated the cold stress and significantly increased the plant biomass on an average of 17.8% for shoot fresh weight, 20.9% for root fresh weight, 15.7% for shoot dry weight, and 15.5% for root dry weight. Similarly, the nutrients uptake also increased on average for shoot-N (28.7%), root-N (22.4%), shoot-P (46.9%), root-P (7.2%), shoot-K (5.4%), root-K (28.9%), shoot-Mg (191.4%), root-Mg (187.2%) under cold stress with +Mg compared to -Mg. Mg application significantly boosted the photosynthetic activity (Pn 24.6%) and increased the chlorophyll contents (Chl-a (18.8%), Chl-b (25%), carotenoids (22.2%)) in the leaves under cold stress in comparison with -Mg treatment. Meanwhile, Mg application also improved the quality of tobacco, including starch and sucrose contents, on an average of 18.3% and 20.8%, respectively, compared to -Mg. The principal component analysis revealed that tobacco performance was optimum under +Mg treatment at 16 degrees C. This study confirms that Mg application alleviates cold stress and substantially improves tobacco morphological indices, nutrient absorption, photosynthetic traits, and quality attributes. In short, the current findings suggest that Mg application may alleviate cold stress and improve tobacco growth and quality.

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