中文摘要：

以玉米农大108为试验材料，在温室和盆栽条件下，研究叶面喷施叔胺类活物质DCPTA和DTA．6对玉米苗期叶片光合特性、光合关键酶以及叶绿素荧光特性的调控机制。结果表明，DCPTA和DTA．6处理显著提高了玉米株高和生物量；显著提高了玉米叶片光合速率、蒸腾速率、气孔导度和叶绿素含量，降低了细胞间隙CO：浓度，但不改变叶绿素a／b值；显著提高了PEPC羧化酶和RuBP羧化酶活性；显著提高了玉米叶片PSⅡ最大光化学效率（Fv／Fm）、PSⅡ有效电子产量（φPSⅡ）和光化学淬灭（qP），降低了非光化学淬灭系数qN；DCPTA和DTA-6处理的适宜浓度分别为50和20mg／L。

英文摘要：

The effect of tertiary amine bioregnlator（ DCPTA and DTA-6）on photosynthesis, photosynthetic key enzyme and chlorophyll fluorescence parameters of corn（ cv. Nongda 108）leaves, was studied in pots under greenhouse. DCPTA and DTA-6 were sprayed on leaves at seedling about four explanted leaves, and with water spraying as control. The results indicated the height and biomass were significantly increased by DCPTA and DTA-6. The photosynthetic rate, transpiration rate, stomatal conductance and chlorophyll content were increased, and the intercellular CO2 concentration was decreased, the chlorophyll a/b was indifference by DCPTA and DTA-6. The activities PEPCase and RuBPcase, maximal photochemical efficiency of PS Ⅱ （Fv/Fm）, effective quantum yield of PS Ⅱ （φPS Ⅱ）, photochemical quenching coefficient（qP）were significantly promoted by DCPTA and DTA-6, but non-photochemical quenching coefficient was declined. The treatment was best at the DCPTA with 50 mg/L and DTA-6 with 20 mg/L.