Grafting alleviates potassium stress and improves growth in tobacco

• DOI: 10.1186/s12870-019-1706-1
• Publication Date: 2019-04-08T13:03:47Z
• Authors: Wei Hu; Qing Di; Zhijin Wang; Yimo Zhang; Jie Zhang; Jia Liu; Xiaojun Shi
• Keywords: Nicotiana; 0106 biological sciences; 2. Zero hunger; Grafting; Botany; Biological Transport; 01 natural sciences; Up-Regulation; Plant Leaves; Genes; Root; Stress, Physiological; Xylem; QK1-989; Tobacco; Potassium; X-ray microanalysis; Research Article

Potassium is a nutrient element necessary for tobacco growth. Tobacco leaves with high potassium content are elastic and tough, rich in oil. And the same time, can also improve scent aromatic value of flue-cured by regulating synthesis hydrocarbons leaves.. It an important quality indicator tobacco. However, concentration most areas China generally lower than global standard Two genotypes were grafted to each other under different levels test whether plant growth be improved grafting The all treatments was inhibited starvation, significantly alleviated this stress 'Yunyan 87'. trends whole K+ uptake transfer efficiency corresponded results grafts. depletion showed that roots 'Wufeng No.2' had higher absorption potential, affinity, inward flow rate. enrichment circles appeared at endoderm root section energy dispersive X-ray figure, indicating formation Casparian strips may partly responsible rate lateral movement Gene expression analysis suggested redistribution level might constitute one strategy coping starvation. feedback regulation effects between scion rootstock 87' indicated transmission certain signaling substances occurred during grafting. increase transport enhance stress. physiological mechanism performance related utilization ability, xylem loading capacity, up-regulated genes supply systems.