土壤质地对不同面筋含量冬小麦品种籽粒淀粉合成关键酶活性的影响

 在池栽条件下，研究了粘土、壤土、沙土对3个不同面筋含量冬小麦品种籽粒灌浆过程中腺苷二磷酸葡萄糖焦磷酸化酶（AGPP）、可溶性淀粉合成酶（SSS）和淀粉分支酶（SBE）活性的影响。结果表明，高面筋含量的藁麦8901在沙土上种植3个酶活性都较高，AGPP活性变化呈双峰曲线，在花后10 d和20 d分别有两个峰值，且第二个峰值显著高于第一个峰值；SSS和SBE变化趋势均呈单峰曲线，花后20 d达到峰值，表明沙土可能有助于藁麦8901籽粒淀粉的合成。豫麦49 AGPP和SSS活性表现为沙土＞壤土＞粘土；而SBE活性粘土和壤土较高，沙土较低，表明3种土壤质地对该品种籽粒淀粉合成可能都是有利的。低面筋含量的洛麦1号在粘土上种植3个酶活性都较高，其变化均呈单峰曲线，峰值出现在花后20 d，表明粘土可能有助于洛麦1号籽粒淀粉的合成。

Effects of Soil Texture on Activities of Key Enzymes of Starch Synthesis in Kernel of Winter Wheat Cultivars with Different Gluten Content

Three key enzymes AGPP, SSS and SBE associated with starch synthesis were studied during grain filling of three winter wheat cultivars with high，medium and low gluten content in the clay，loam and sandy soil texture in the condition of pond culture. The results indicated that three enzymes activities of high gluten content cultivars were higher in the sandy soil，AGPP activity came to be a double-peak curve，its peaks appeared at 10 d and 20 d after anthesis，respectively. SSS and SBE activities had a single-peak curve，its peak appeared at 20 d after anthesis. It showed that sandy soil could be helpeful to high gluten content cultivars in synthetise starch. AGPP and SSS activities of medium gluten content cultivars showed "sand＞loam＞clay"，but SBE activities of clay and loam soil were higher than that of sandy soil. It showed that three kinds of soil texture could be helpeful medium gluten content cultivars to synthesize starch. Three enzymes activities of low gluten content cultivars were higher in the clay soil，its changing trend came to be a single-peak curve，the peak appeared in 20 d after anthesis. It showed that clay soil could be helpeful low to gluten content cultivars to synthesize starch.