花后干旱胁迫对燕麦穗部器官光合生理及糖代谢的影响

打开文本图片集

中图分类号：S544+.9；S519；S548 文献标识码：A 文章编号：1007-0435（2026）02-0415-09

Effects of Drought Stress on the Photosynthetic Physiology and Sugar Metabolism in Oat Ear Organs after Flowering

ZHAN Yuan¹， CUI Qi2 ， YU Ying-qian1， FANG Jia-qi³，WANG Hui³* （1.BijieCityontrolockyDeseificatioMagemntCenterieCityorestryureau，ijiezouProvine599in; 2.ColegeofPacyouthestinuUiversityguanPriceohi；.Colgeoasandsout westMinzu University，Chengdu，Sichuan Province 6lOO41，China）

Abstract：In orderto explore the photosynthetic physiological diferences of oat ear organs and flag leaves under drought stress，a pot experiment was conducted using Auena satiua L.‘Kona’as the experimental material. Drought stress was initiated after the first flower bloomed.Chlorophyll contents，photosynthetic enzyme activities，soluble sugar and starch contents in flag leaves and ear organs were measured at O，7and l4 days after drought stress treatment. The results showed that the chlorophyll content in the glumes was higher than that of theflag 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 stability. Key words：Oat; Ear Organs;Drought stress ; Photosynthetic physiology; Sugar content

燕麦（AvenasatiuaL.）是禾本科小麦族燕麦属一年生粮饲兼用作物，根据燕麦种子成熟期稃片与籽实分离与否分为裸燕麦和皮燕麦，常分别作为粮食和饲草用[1]。（剩余18487字）