作物学报 ›› 2015, Vol. 41 ›› Issue (10): 1557-1563.doi: 10.3724/SP.J.1006.2015.01564
王庆燕1,管大海1,2,潘海波1,李建民1,段留生1,张明才1,*,李召虎1
WANG Qing-Yan1, GUAN Da-Hai1,2,PAN Hai-Bo1,LI Jian-Min1,DUAN Liu-Sheng1,ZHANG Ming-Cai1,*,LI Zhao-Hu1
摘要:
以玉米品种“郑单”为材料,在大田条件下,采用植物生长调节物质油菜素内酯,对苞叶和穗位叶喷施处理,研究了对玉米穗位叶功能、籽粒灌浆及产量的调控作用。结果表明,灌浆期随生育进程,玉米穗位叶叶绿素含量、光合速率、磷酸烯醇式丙酮酸羧化酶、二磷酸核酮糖羧化酶以及蔗糖磷酸合酶和蔗糖合酶的活性均显著下降。同时,籽粒蔗糖含量显著降低,但淀粉含量和粒重均显著增加。与对照相比,处理显著增加玉米穗位叶叶绿素含量,提高光合速率,增强、、蔗糖磷酸合酶和蔗糖合酶的活性。处理显著增加籽粒蔗糖和淀粉积累,提高玉米籽粒干物质积累。在产量构成上,显著缩短秃尖长度,增加穗粒数和千粒重,显著提高产量。本研究说明,灌浆期喷施可提高玉米叶源的活性,延长叶片光合功能持续期,促进籽粒灌浆和物质积累,从而实现增产。
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