|Table of Contents|

Effect of Exogenous Phenolic Acids on Biomass Accumulation and Antioxidant System of Greenhouse Cucumber Seedlings(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年20
Page:
44-49
Research Field:
Publishing date:

Info

Title:
Effect of Exogenous Phenolic Acids on Biomass Accumulation and Antioxidant System of Greenhouse Cucumber Seedlings
Author(s):
CHEN Tianxiang; GU Xin; SUN Quan
（College of Agriculture，Ningxia University，Yinchuan，Ningxia 750021)
Keywords:
autotoxicity; cinnamic acid; p-hydroxybenzoic acid; antioxidant system; growth of seedling
PACS:
-
DOI:
10.11937/bfyy.201620012
Abstract:
For the autotoxicity of greenhouse cucumber under continuous cropping，taking ‘Jinchun 5’ cucumber seedlings as test materials to do experiment of sand culture with exogenous phenolic acids of different concentration，the impact on biomass accumulation of cucumber seedlings，growth of root and antioxidant system of leaf were discussed.The results showed that chlorophyll content and stem diameter were promoted significantly by cinnamic acid of 50 mg?kg-1,chlorophyll content was promoted by the p-hydroxybenzoic acid of 100-150 mg?kg-1 significantly，this function was suppressed with high concentration.The aboveground fresh weight was enhanced by phenolic acids of 30-50 mg?kg-1 obviously，but no significant diversity.The concentration of 50 mg?kg-1 cinnamic acid had a promoting significant role for the root/shoot ratio and was favorable to growth of root，this function was suppressed with high concentration.However，p-hydroxybenzoic acid of 50 mg?kg-1 had significant inhibition on root fresh weight，root length and root volume.The concentration of 50-150 mg?kg-1 had no obvious stimulation for the superoxide dismutase (SOD).Two kinds of phenolic acids 30-150 mg?kg-1 had similar effect on the peroxidase (POD) activity.When the concentration of phenolic acids was 200 mg?kg-1 and more，enhanced POD activity significantly，membrane permeability and malondialdehyde (MDA) content also increased significantly under the high concentration.Therefore，cucumber seedlings had a certain tolerance to low concentration (30-50 mg?kg-1) phenolic acids，and high concentration (200 mg?kg-1) inhibit the growth and development of cucumber seedlings，the adaptability concentration ranges of physiological effects was various.

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Last Update: 2016-11-22