|Table of Contents|

Regulation of DCPTA and DTA-6 on Photosynthesis and Chlorophyll Fluorescence Parameters of Soybean Leaves(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年05期
Page:
777-782
Research Field:
Publishing date:

Info

Title:
Regulation of DCPTA and DTA-6 on Photosynthesis and Chlorophyll Fluorescence Parameters of Soybean Leaves
Author(s):
GU Wan-rong;  LI Zhao-hu;  ZHAI Zhi-xi;  DUAN Liu-sheng;  ZHANG Ming-cai
Key Laboratory of Crop Cultivation and Farming System，Ministry of Agriculture，College of Agronomy and Biotechnology，China Agricultural University，Beijing 100094，China
Keywords:
Plant growth regulator; DCPTA; DTA-6;  Soybean;  Photosynthesis;  Chlorophyll fluorescence
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2008.05.0777
Abstract:
Tertiary Amines substance is a kind of high bioactive regulators with low molecular weight. DTA-6 and DCPTA are the two representative tertiary compounds，which has various influences on physiological process in plants. Up to now, most work were focused the physiological effect and little has been known about the mechanism of the promotive effect of DTA-6 on plant photosynthesis, which prevent them into practical application.The objective of this work was to find the photosynthetic responses of corn and soybean to foliar application of DTA-6.The effect of DCPTA and DTA-6 on photosynthesis, photosynthetic key enzyme and chlorophyll fluorescence parameters of soybean (cv. Zhonghuang 13) leaves, was studied in pots under greenhouse. DCPTA and DTA-6 were sprayed on leaves at seedling about the first fully 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 CO2concentration and chlorophyll a/b were decreased by the application of DCPTA and DTA-6. The activities of PEPCase and RuBPcase, maximal photochemical efficiency of PSⅡ (Fv/Fm), effective quantum yield of PSⅡ (ΦPSⅡ), photochemical quenching coefficient (qP) were significantly promoted by the application of DCPTA and DTA-6, but non-photochemical quenching coefficient(qN)was declined. The optimun concentration for soybean was 20 mg.L-1DCPTA and 10 mg.L-1DTA-6.

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Last Update: 2014-10-06