铝胁迫下茶多酚和咖啡因对葡萄生长生理的影响

Effects of Tea Polyphenols and Caffeine on the Growth Physiology of Grape Seedlings under Aluminum Stress

分别用0.25,0.50,0.75,1.00 mg/L的茶多酚和咖啡因处理10 mmol/L Al3+胁迫下的葡萄苗,60 d后测定其生长及生理指标.结果发现,铝胁迫下,葡萄苗叶片宽度和厚度增大,节间距、根长和株高变小,茎粗增大,生长受抑;叶片和根系的可溶性糖、氮、钾含量下降,铝含量大幅度上升.茶多酚和咖啡因处理可使铝胁迫下的葡萄叶片长、宽、厚增大,节间距和根长增长,株高增高;且叶片和根系的可溶性糖、氮、磷、钾的含量总体上升,铝含量下降.总体看来,0.50~0.75 mg/L茶多酚和咖啡因处理对铝胁迫下葡萄苗的生长和树体营养的积累有促进作用.

The grape seedlings with 10 mmol/L potassium aluminum sulfate stress were treated with 0. 25 ,0 . 5 0 ,0 . 7 5 ,1 .0 0 mg/L, tea polyphenols and caffeine respectively for 60 days to determine their growth and physical sings. The results showed that under the alumi-num stress, the width and thickness of leaf increased; pitch distance, root length and plant height became smaller; stem diameter in-creased ,and the grape seedlings growth inhibited ; the contents of soluble sugar, nitrogen and potassium in leaves and roots decreased, and aluminum content increased greatly. Tea polyphenols and caffeine make leaf length, width, thickness, internode length, root length and the plant height of grape with the aluminum stress increased; and the contents of soluble sugar, nitrogen, phosphorus and potassium in leaves and roots increased, and aluminum content decreased. In general, the treatments of tea polyphenols and caffeine from 0. 50 to 0.75 mg/L could promote the growth and the accumulation of tree nutrition of grape seedlings under the aluminum stress.