Effects of cinnamic acid on physiological characteristics of Cucumis sativus seedling

Abstract

Abstract: With substrate culture,this paper studied the effects of different concentrations of cinnamic acid on the physiological characteristics of Cucumis sativus seedling.The results showed that 25 μmol·L^-1 of cinnamic acid had an inhibition effect on carotenoids,but a promotion effect on chlorophyll a and b.50 μmol·L^-1 of this compound could significantly inhibit the photosynthetic rate,transpiration rate and root activity (P<0.05),and this effect was getting stronger when the concentration was higher.150 μmol cinnamic acid·L^-1 had a significant inhibition effect on chlorophyll a and b (P<0.05).Cinnamic acid had a weak inhibition effect on root activity when its concentration was low(25～50 μmol ·L^-1),but the effect was significant when the concentration was high (100～150 μmol·L^-1),which became stronger with the longer handling time (P<0.05).

Key words: Cinnamic acids, Allelopathy, Photosynthetic rate, Cucumis sativus, Transpiration rate, Root activity

CLC Number:

Q945

WU Fengzhi, PAN Kai, ZHOU Xiuyan . Effects of cinnamic acid on physiological characteristics of Cucumis sativus seedling[J]. Chinese Journal of Applied Ecology, 2005, 16(5): 915-918.

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