CAJ | 학술논문

为探讨低磷胁迫下玉米叶片抗氧化系统及可溶性糖含量的阶段变化特性与玉米耐低磷能力之间的关系，以2份高耐低磷（511、178）和2份对低磷胁迫高度敏感（492、9782）的玉米自交系为材料，采用河沙盆栽的方法，研究低磷胁迫对玉米叶片抗氧化系统及可溶糖含量阶段性变化的影响。结果表明：自交系的总体耐低磷能力为178＞511＞492＞9782。低磷胁迫下，玉米叶片的SOD活性、POD活性和可溶性糖含量先高于对照后低于对照，而M DA含量始终高于对照。4个自交系出苗期、拔节期、吐丝期和灌浆期相对SOD活性平均值分别为1．90、0．93、0．76、0．61，相对POD活性平均值分别为1．33、1．02、0．66、0．62，相对MDA含量平均值分别为1．18、1．77、1．52、1．60，相对可溶糖含量平均值分别为1．24、1．85、1．10、0．77。与敏感型自交系相比，耐低磷自交系的SOD和POD活性因低磷胁迫变化较小，MDA含量增加幅度也较小，而可溶糖含量在低磷胁迫早期增加幅度较大。
위탐토저린협박하옥미협편항양화계통급가용성당함량적계단변화특성여옥미내저린능력지간적관계，이2빈고내저린（511、178）화2빈대저린협박고도민감（492、9782）적옥미자교계위재료，채용하사분재적방법，연구저린협박대옥미협편항양화계통급가용당함량계단성변화적영향。결과표명：자교계적총체내저린능력위178＞511＞492＞9782。저린협박하，옥미협편적SOD활성、POD활성화가용성당함량선고우대조후저우대조，이M DA함량시종고우대조。4개자교계출묘기、발절기、토사기화관장기상대SOD활성평균치분별위1．90、0．93、0．76、0．61，상대POD활성평균치분별위1．33、1．02、0．66、0．62，상대MDA함량평균치분별위1．18、1．77、1．52、1．60，상대가용당함량평균치분별위1．24、1．85、1．10、0．77。여민감형자교계상비，내저린자교계적SOD화POD활성인저린협박변화교소，MDA함량증가폭도야교소，이가용당함량재저린협박조기증가폭도교대。
In order to explore the antioxidant system of maize under low‐P stress and the relationship between of the soluble sugar content change and resistant ability against low‐P ,maize inbred lines 511(HT) ,178(HT) , 492(HS) and 9782(HS) were potted in sand to study the low‐P stress effect on the changes of maize antioxi‐dant system and soluble sugar content .The results showed that the tolerance to low‐P stress was 178>511>492>9782 .Under low‐P stress ,SOD activity ,POD activity and soluble sugar content were firstly higher than control and then lower ,but the MDA content was higher than control all the time .The relative SOD activity at seedling ,elongation ,silking and filling stage averaged at 1 .90 ,0 .93 ,0 .76 and 0 .61 respectively .The average relative POD activity at the four stages were 1 .33 ,1 .02 ,0 .66 and 0 .62 ,average relative MDA content were 1 .18 ,1 .77 ,1 .52 and 1 .60 ,average relative soluble sugar content was 1 .24 ,1 .85 ,1 .10 and 0 .77 ,respectively . Compared with the HS lines ,the SOD and POD activity of the HT lines was influenced less by low‐P stress , MDA content increased less ,but there was a larger increase of soluble sugar content at early stage .