|Table of Contents|

Effects of Putrescine on Growth,Antioxidant System and Photosynthesis of Cucumber Seedling Under Calcium Nitrate Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年03
Page:
5-10
Research Field:
Publishing date:

Info

Title:
Effects of Putrescine on Growth,Antioxidant System and Photosynthesis of Cucumber Seedling Under Calcium Nitrate Stress
Author(s):
LI YajieLU Xiaomin
(College of Life Science,Anhui Science and Technology University,Fengyang,Anhui 233100)
Keywords:
cucumbercalcium nitrate stressputrescineantioxidant systemphotosynthesis
PACS:
-
DOI:
10.11937/bfyy.201703002
Abstract:
The effects of putrescine (Put) on growth,antioxidant system and photosynthesis of cucumber seedling ‘Jinchun No.2’ were studied under calcium nitrate stress.The results showed that,as compared with the control,calcium nitrate stress significantly increased the leaf H2O2 contents,lipid peroxidation and cell membrane permeability while decreased the leaf net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr) and intercellular CO2 concentration(Ci) by 33.39%,55.18%,30.23%,34.56%,respectively,and dry matter accumulation reduced by 44.17%.Applying Put could increase the activities of SOD,POD and CAT,decrease the superoxide anion production rate,hydrogen peroxide contents,malondialdehyde contents and membrane permeability,alleviate the drop range of Pn,speed up the growth of seedlings and increase the dry matter accumulation by 21.59%.Therefore,Put treatment could keep a higher photosynthetic performance and effectively promote cucumber seedlings growth by adjusting the protective enzyme activity and reduce membrane lipid peroxide level under calcium nitrate stress.

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Last Update: 2017-03-22