两个不同穗型小麦品种生育后期碳水化合物代谢的比较研究  

Comparison between Two Wheat Varieties with Different Spike Type in Carbohydrate Metabolism during Late Growth Period

作　　者：赵会杰[1] 邹琦[2] 张秀英 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]山东农业大学生命科学学院,山东泰安271018 [3]河南省郑州市邙山区农技站,河南郑州450053

出　　处：《作物学报》2003年第5期676-681,共6页Acta Agronomica Sinica

基　　金：国家重点基础研究发展规划项目 (G19980 10 10 0 );河南省自然科学基础研究项目资助 (0 1110 10 80 0 )

摘　　要：比较研究表明 ,两个不同穗型小麦品种在产量形成期的碳水化合物代谢存在明显差异。大穗型品种 (豫麦 6 6 )在灌浆中后期旗叶可维持较高的净光合速率 (Pn)、蔗糖磷酸合成酶 (SPS)活性与可溶性碳水化合物 (WSC)含量 ;籽粒则具有较高的蔗糖合成酶 (SS)活性和淀粉积累速率。因此 ,其产量水平和反映源库关系协调程度的粒叶比均高于多穗型品种 (豫麦 4 9)。Two wheat varieties with different spike type were used to study carbohydrate metabolism during the stage for yield formation and obvious differences were found. Compared with small-spike variety (Yumai 49), large-spike variety (Yumai 66) maintained higher net photosynthetic rate, activity of sucrose phosphate synthase and content of water soluble carbohydrate in flag leaf during mid to late grain-filling stage. At the same time, the activity of sucrose synthase and the rate of starch accumulation in the grains of Yumai 66 were also higher than those of Yumai 49. Consequently, the yield and the grain-leaf ratio (an index for measuring source-sink relationship) of the large-spike variety were higher than those of the small-spike variety.

关 键 词：穗型 小麦 品种 生育后期 碳水化合物 代谢 产量形成期 灌浆 净光合速率 蔗糖磷酸合成酶 

分 类 号：S512.1[农业科学—作物学]