草地学报2026，Vol.34Issue(2)：415-423,9.DOI:10.11733/j.issn.1007-0435.2026.02.004
花后干旱胁迫对燕麦穗部器官光合生理及糖代谢的影响
Effects of Drought Stress on the Photosynthetic Physiology and Sugar Metabolism in Oat Ear Organs after Flowering
摘要
Abstract
In order to explore the photosynthetic physiological differences of oat ear organs and flag leaves under drought stress,a pot experiment was conducted using Avena sativa L.'Kona'as the experimental material.Drought stress was initiated after the first flower bloomed.Chlorophyll contents,photosynthetic enzyme activi-ties,soluble sugar and starch contents in flag leaves and ear organs were measured at 0,7 and 14 days after drought stress treatment.The results showed that the chlorophyll content in the glumes was higher than that of the flag leaves,while the chlorophyll content of the lemmas was lower.Drought stress significantly reduced the enzyme activities of Rubisco,PEPC,and PEPCK in the flag leaves,while it had no significant influence on the activities of Rubisco in glumes and PEPCK,NADP-ME,NAD-ME activities in both ear organs.In addition,the activities of Rubisco,PEPC and PEPCK in the glumes were significantly higher than those in the flag leaves.Drought stress significantly increased the soluble sugar and starch contents in the flag leaves,while had no significant influence on sugar contents in both ear organs.To sum up,the flag leaves of'Kona'oats responded more sensitively to drought stress,while the ear organs,especially the glumes,maintained better sta-bility.关键词
燕麦/穗部器官/干旱胁迫/光合生理/糖含量Key words
Oat/Ear Organs/Drought stress/Photosynthetic physiology/Sugar content分类
农业科技引用本文复制引用
詹圆,崔琪,虞应乾,方嘉琪,汪辉..花后干旱胁迫对燕麦穗部器官光合生理及糖代谢的影响[J].草地学报,2026,34(2):415-423,9.基金项目
国家自然科学基金项目(32001392) （32001392）
西藏牧草种质创制与人工草地提质增效关键技术研究与示范(XZ202501ZY0086)共同资助 （XZ202501ZY0086）
