中外葡萄与葡萄酒Issue(4)：31-38,8.DOI:10.13414/j.cnki.zwpp.2025.04.005
高温胁迫下不同摘心处理对葡萄叶片叶绿素荧光特性影响
Effects of Different Shoot-pinching Methods on Chlorophyll Fluorescence Characteristics of Leaves of Grape under High Temperature Stress
摘要
Abstract
To investigate how the leaf canopy layer mitigates extreme heat-induced scorching during summer high-temperature stress,we systematically compared the effects of different shoot-tip removal treatments on chlorophyll fluorescence characteristics in grape leaves.10-year-old'Red Balado'grapevines grown in a solar greenhouse were used as the materials,with 2,4,8,or 6 leaves retained above the clusters after shoot-pinching removal(designated as A1,A2,A3,and CK,respectively).During high-temperature periods,daily variations in chlorophyll fluorescence parameters were measured for three consecutive days using a plant efficiency analyzer.As temperature increased,leaves under the A2 treatment showed significantly higher values of Fv/Fm,Fv/Fo,φPo and φEo,while the relative fluorescence intensities at the L,K and J points on the OJIP curves and their variable fluorescence values were lower compared to other treatments.Additionally,the A2 treatment exhibited a higher density of photosynthetic reaction centers per unit leaf cross-sectional area and a lower DIo/CSm value.The results showed that retaining 4 leaves above the clusters during shoot-pinching removal effectively alleviated heat-induced leaf damage,providing both a theoretical foundation and practical strategies for protecting grapevines against extreme summer temperatures.关键词
'红巴拉多'葡萄/高温胁迫/叶绿素荧光/光系统ⅡKey words
'Red Balado'grape/high temperature stress/chlorophyll fluorescence/PSⅡ分类
农业科技引用本文复制引用
齐育恒,姜建福,田淑芬,王超霞,王荣,马闯..高温胁迫下不同摘心处理对葡萄叶片叶绿素荧光特性影响[J].中外葡萄与葡萄酒,2025,(4):31-38,8.基金项目
财政部和农业农村部:国家现代农业产业技术体系(CARS-29-zp-1) （CARS-29-zp-1）
