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

doi:10.11733/j.issn.1007-0435.2026.02.004

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (2): 415-423.DOI: 10.11733/j.issn.1007-0435.2026.02.004

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. Bijie City Control Rocky Desertification Management Center, Bijie City Forestry Bureau, Bijie, Guizhou Province 551799, China;
2. College of Pharmacy, Southwest Minzu University, Chengdu, Sichuan Province 610041, China;
3. College of Grassland Resources, Southwest Minzu University, Chengdu, Sichuan Province 610041, China

Received:2025-06-09 Revised:2025-08-21 Published:2026-01-22

花后干旱胁迫对燕麦穗部器官光合生理及糖代谢的影响

詹圆¹, 崔琪², 虞应乾¹, 方嘉琪³, 汪辉³

1. 毕节市林业局毕节市防治石漠化管理中心, 贵州毕节 551799;
2. 西南民族大学药学院, 四川成都 610066;
3. 西南民族大学草地资源学院, 四川成都 610066

通讯作者: 汪辉，E-mail:zzbjwh@163.com
作者简介:詹圆（1996-），男，汉族，贵州晴隆人，硕士，主要从事草地管理建设及牧草育种研究，E-mail:18224908391@163.com；
基金资助:
国家自然科学基金项目（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

Abstract

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 activities， 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 stability.

Key words: Oat, Ear Organs, Drought stress, Photosynthetic physiology, Sugar content

摘要： 为了探索干旱胁迫下燕麦（Avena sativa L.）穗部器官和旗叶的光合生理差异。本研究以‘科纳’燕麦（Avena sativa L. ‘Kona’）为试验材料开展盆栽试验。在燕麦第1朵小花开花后进行干旱胁迫处理，在干旱胁迫0 d、7 d和14 d后测定了旗叶和穗部器官的叶绿素含量、光合酶活性、可溶性糖含量、淀粉含量等光合生理和糖含量指标。结果表明，颖片叶绿素含量高于旗叶，稃片叶绿素含量较低。干旱胁迫显著降低了旗叶中Rubisco、PEPC、PEPCK活性，但未显著影响颖片中Rubisco活性及颖片和稃片中PEPCK、NADP-ME、NAD-ME活性；同时，干旱胁迫下，颖片中Rubisco、PEPC和PEPCK酶活性显著高于旗叶。干旱胁迫显著增加了旗叶中淀粉含量和可溶性糖含量，而未显著影响颖片和稃片中糖含量。综上所述，‘科纳’燕麦旗叶的光合生理和糖含量对干旱胁迫响应敏感，而穗部器官特别是颖片保持了更好的稳定性。

关键词: 燕麦, 穗部器官, 干旱胁迫, 光合生理, 糖含量

ZHAN Yuan, CUI Qi, YU Ying-qian, FANG Jia-qi, WANG Hui. Effects of Drought Stress on the Photosynthetic Physiology and Sugar Metabolism in Oat Ear Organs after Flowering[J]. Acta Agrestia Sinica, 2026, 34(2): 415-423.

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.

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

花后干旱胁迫对燕麦穗部器官光合生理及糖代谢的影响

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