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

doi:10.7668/hbnxb.2008.03.022

Abstract

Abstract: The effect of tertiary amine bioregulator(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 PSⅡ(Fv/Fm),effective quantum yield of PSⅡ(ΦPSⅡ),photochemical quenching coefficient(qP)were significantly promoted by DCPTA and DTA-6,but nonphotochemical quenching coefficient was declined.The treatment was best at the DCPTA with 50 mg/L and DTA-6 with 20 mg/L.

Key words: Plant growth regulator DCPTA and DTA-6, Corn, Photosynthesis, ChlorophyII fluorence

CLC Number:

S13.01

GU Wan-rong, LI Zhao-hu, ZHAI Zhi-xi, DUAN Liu-sheng, ZHANG Ming-cai. Regulation of Tertiary Amine Bioregulator on Photosynthesis and Chlorophyll Fluorescence Parameters of Corn Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(3): 85-89. doi: 10.7668/hbnxb.2008.03.022.

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