| 张英华，苏 达，张胜全，周顺利，王志敏，张永平，方保停.不同水分条件下冬小麦旗叶和穗器官的PEPC活性及其与粒重和蛋白质含量的关系[J].麦类作物学报,2009,29(6):997 |
| 不同水分条件下冬小麦旗叶和穗器官的PEPC活性及其与粒重和蛋白质含量的关系 |
| Phosphoenolpyruvate Carboxylase Activity of Flag Leaf and Ear Organs and Its Relationship with Grain Weight and Protein Concentin Winter Wheat under Different Water Treatments |
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| DOI：10.7606/j.issn.1009-1041.2009.06.011 |
| 中文关键词: 冬小麦 水分胁迫 PEPC活性 籽粒重 蛋白质含量 |
| 英文关键词:Winter wheat Water stress PEPC activity Grain weight Protein concentration |
| 基金项目:“973”“课题主要粮食作物高产栽培与资源高效利用基础研究”(2009CB118605); 农业部现代农业产业技术体系建设及公益性行业科研专项(nyhyzx07 002)。 |
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| 中文摘要: |
| 为了明确小麦叶与非叶器官磷酸烯醇式丙酮酸羧化酶 （PEPC） 活性对水分胁迫的反应，在春不浇水和春浇2水两种水分条件下，对11个冬小麦品种旗叶、穗、颖片及籽粒的PEPC活性进行了测定，并分析了该酶活性与粒重和蛋白质含量的关系。结果表明，小麦不同品种和不同器官间PEPC活性存在明显差异，且受水分条件的影响。与正常供水处理(春浇2水)相比，水分胁迫处理(春不浇水)灌浆期旗叶PEPC活性下降，而颖片PEPC活性相对稳定，籽粒PEPC活性上升。水分胁迫使最终粒重降低、蛋白质含量增加。相关分析表明，灌浆期旗叶PEPC活性与粒重呈显著正相关（r＝0.504*），颖片PEPC活性与籽粒蛋白质含量呈弱的正相关，籽粒PEPC活性与籽粒蛋白质含量呈极显著正相关（r＝0.692**）。 |
| 英文摘要: |
| Phosphoenolpyruvate carboxylase (PEPC) is a key enzyme involving in carbon and nitrogen metabolism. PEPC activity can be manipulated by Environment. In this study, 11 winter wheat cultivars were selected to study the effects of no irrigation and 2 times irrigation in spring on PEPC activities of flag leaf， glume and grain， grain weight and protein concentration and the correlations between them. The results showed that there were significant differences in PEPC activity among cultivars and among organs, and PEPC activity can be regulated by water supply. Compared to normal water supply (2 times irrigation in spring), PEPC activity of flag leaf blade in no irrigation treatment reduced, PEPC activity of glume was relatively constant， PEPC activity of grain increased during grain filling, while the final grain weight decreased and grain protein concentration increased. Correlation analysis showed that PEPC activity of flag leaf was significantly and positively correlated with grain weight (r＝0.504, P<0.05), that of glume was positively correlated with grain protein concentration weakly， and that of grain was significantly and positively correlated with grain protein concentration (r＝0.692, P<0.01). According to relative studies， we proposed that PEPC can regulate carbon and nitrogen metabolism in plant, and the increase of PEPC activity in leaf and non leaf organs may be benefit to improve grain yield and protein concentration simultaneously. |
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