作物学报 ›› 2013, Vol. 39 ›› Issue (06): 1111-1118.doi: 10.3724/SP.J.1006.2013.01111
陈晓璐1,李耕1,刘鹏1,*,高辉远2,董树亭1,王振林1,张吉旺1,赵斌1
CHEN Xiao-Lu1,LI Geng1,LIU Peng1,*,GAO Hui-Yuan2,DONG Shu-Ting1,WANG Zhen-Lin1,ZHANG Ji-Wang1,ZHAO Bin1
摘要:
以玉米自交系齐319 (Qi 319)为试材,利用叶绿素荧光快速诱导动力学曲线,研究了喷施外源激素6-苄氨基嘌呤(6-BA)对不同氮素水平下玉米花后叶片光系统II (PSII)性能的调控效应。两年研究结果表明,花后穗位叶叶绿素含量和净光合速率(Pn)均呈降低的趋势。在不施氮条件下,外源喷施6-BA,可提高叶绿素含量及后期Pn,但对PSII反应中心的活性无显著改善。施氮可显著提高Pn和PS II的性能,6-BA可显著增强其效果。二者互作条件下,叶绿素含量显著提高,Pn显著增加(P<0.05),PSII供体侧和受体侧的活性得到有效改善,其中对PSII供体侧性能的改善幅度大于对受体侧,PSII反应中心的活性提高以花后10 d最显著。光合性能的提高使单株生物量和籽粒产量显著增加(P<0.05)。因此,在适量施用氮肥的条件下结合喷施6-BA可以显著改善叶片光合性能。
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