叔胺类活物质对玉米叶片光合特性与叶绿素荧光特性的调控效应  

Regulation of Tertiary Amine Bioregulator on Photosynthesis and Chlorophyll Fluorescence Parameters of Corn Leaves

作　　者：顾万荣[1] 李召虎[1] 翟志席[1] 段留生[1] 张明才[1] 

机构地区：[1]中国农业大学农学与生物技术学院农学系,农业部作物栽培与耕作学重点开放实验室,北京100094

出　　处：《华北农学报》2008年第3期85-89,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家自然科学基金(30500306);国家“863”计划项目(2006AA10A213)

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CO2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20 mg/L。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.

关 键 词：植物生长调节剂DCPTA和DTA-6 玉米 光合作用 叶绿素荧光 

分 类 号：S513.01[农业科学—作物学]