草地学报2026，Vol.34Issue(5)：1701-1716,16.DOI:10.11733/j.issn.1007-0435.2026.05.013
不同燕麦品种苗期形态、生理对低磷胁迫的响应及耐低磷评价
Low Phosphorus Stress Responses of Seedling Morphology and Physiology to and Evaluation of Low Phosphorus Tolerance of Different Oat Cultivars
摘要
Abstract
The aim of this study was to screen low phosphorus-tolerant oat(Avena sativa L.)varieties and to investigate their morphophysiological response mechanisms.Thirty oat varieties were used as materials,and two treatments of normal phosphorus(1000 μmol·L-1 KH2PO4,CK)and low phosphorus(10 μmol·L-1 KH2PO4,LP)were set up by hydroponics.Morphological and physiological indexes were measured after 21 days,and principal components,subordinate functions,and cluster analyses were used for the comprehensive evaluation.The results showed that low phosphorus stress significantly inhibited the aboveground growth of most oat seedlings,but promoted root development.Physiologically,low phosphorus treatment led to a decrease in phosphorus uptake and a significant increase in phosphorus utilization efficiency in most seedlings;soluble sugar content,acid phosphatase and nitrate reductase activities generally increased.Through systematic evaluation,'Weidu You No.5'(D=0.818)and'Jin Yan No.17'(D=0.643)were identified as the most low-phosphorus-tolerant varieties,whereas'Ba You No.18'(D=0.341)and'Jun Ma'(D=0.366)were the most sensitive ones.The results of this study provide a theoretical basis and material foundation for the selection and breeding of low phosphorus tolerant oat varieties.关键词
燕麦/低磷胁迫/形态指标/生理响应/耐低磷评价Key words
Avena sativa/Low phosphorus stress/Morphological index/Physiological response/Low-phospho-rus tolerance evaluation分类
农业科技引用本文复制引用
廖万奇,汪辉,王沛,陈有军,周青平,雷映霞..不同燕麦品种苗期形态、生理对低磷胁迫的响应及耐低磷评价[J].草地学报,2026,34(5):1701-1716,16.基金项目
农业科技重大项目(NK20220402) （NK20220402）
四川省科技计划面上项目(2024NSFSC0310) （2024NSFSC0310）
中央高校项目(ZYN2025029) （ZYN2025029）
西藏自治区科技计划项目(XZ202501ZY0086)资助 （XZ202501ZY0086）
