Effect of Spraying Algal Oligosaccharide on Drought Resistance of Tea Plant
Wang Heng
Cao Jiayin
Hou Jian
Zhao Li
Han Xiaoyang
Abstract：The aim of this study was to investigate the effects of spraying algae oligosaccharide on leaf histomorphology,physiological and biochemical indicators and related genes expression of tea plants under drought stress,so as to improve the drought resistance of tea.The potted one-year'Fuding Dabai Cha'plants were used as experimental material.The results showed that spraying algae oligosaccharide could make the pal-isade tissue of the tea leaves more tightly arranged and increase the number of spongy tissue cells under drought stress.Compared with the control,the algae oligosaccharide treatment increased the chlorophyll con-tent and water content of the leaves by 36.36%and 15.29%respectively,reduced the relative conductivity by 36.00%,significantly alleviated the degradation of chlorophyll and loss of water,and reduced the electrolyte leakage.After spraying algae oligosaccharide,the activities of antioxidant enzymes such as SOD,CAT and POD and the contents of soluble sugars,proline and abscisic acid in tea leaves increased significantly.In addi-tion,spraying algae oligosaccharide under drought stress significantly enhanced the relative expression levels of genes such as CsCAT,CsABA1,CsPRX3,CsPYL4,CsSUS4,CsSnRK2.8,CsLEA1,CsNCED1,CsP5CS and CsCu/Zn-SOD in the leaves.In conclusion,spraying algae oligosaccharide could induce tea plants to produce stress-resistant substances and improve their drought resistance,so soalgae oligosaccharide could be used as an effec-tive plant growth-stimulating substance in tea plant management.
Keywords：Tea treeAlgal oligosaccharideDrought resistanceLeaf histomorphologyPhysiological and biochemical indicatorsGene expression
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 63-70 )