山东农业科学Issue(1)：74-82,9.DOI:10.14083/j.issn.1001-4942.2016.01.018
水磷耦合对高淀粉玉米自交系根系形态和磷素吸收分配的影响
Coupling Effects of Moisture and Phosphorus on Root Morphology and Phosphorus Cycling of High-Starch Maize Inbred Line
摘要
Abstract
Using maize inbred lines 12SG188 (high starch content) and 99038 (low starch content) as study materials, the influences of phosphorus and water on the morphology of root system and phosphorus ab-sorption and distribution inside plants of maize inbred lines were studied with quartz sand potting method.The results showed that, within the growth period, the plant root system number, total leaf area, dry matter accu-mulation and phosphorus absorption efficiency of high-starch maize inbred line 12 SG188 were all higher than those of low-starch maize inbred line 99038.Regardless of being under water stress or not, with the increase of the amount of phosphorus supply, the total plant leaf area and the amount of dry matter accumulation in the two maize inbred lines both significantly increased, whereas water stress had greater influence on dry matter accumulation in 99038 than that in 12SG188.In 12SG188, the increase of the total amount of phosphorus ac-cumulation under low-phosphorus water stress treatment was higher than that under low-phosphorus normal water treatment, and was higher than that in 99038 under low-phosphorus water stress treatment.In 99038, the increase of the total amount of phosphorus accumulation under high-phosphorus normal water treatment was higher than that under high-phosphorus water stress treatment, and was higher than that in 12SG188 un-der high-phosphorus normal water treatment.Thus, 12SG188 maize inbred line had higher phosphorus ab-sorption efficiency than 99038, and was more resistant to low phosphorus and draught than 99038.12SG188 had the highest amounts of total phosphorus transport in xylem sap and phosphorus recirculation in phloem un-der high-phosphorus normal water condition, while 99038 had the lowest amounts of total phosphorus trans-port in xylem and phloem under low-phosphorus water stress condition.关键词
玉米自交系/水磷交互/磷素营养/木质部汁液/体内循环Key words
Maize inbred line/Interaction of moisture and phosphorus/P nutrition/Xylem sap/Body circulation分类
农业科技引用本文复制引用
张慧,穆春华,孙验玲,徐立华,陈宇,翟学旭,李宗新,王庆成,刘霞..水磷耦合对高淀粉玉米自交系根系形态和磷素吸收分配的影响[J].山东农业科学,2016,(1):74-82,9.基金项目
国家自然科学基金项目（31301271）；公益性行业（农业）科研专项 （）
