|Table of Contents|

Physiological Mechanism of Exogenous Betaine and Calcium Chloride on Improving Cold Tolerance in Duranta repens(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年08
Page:
154-159
Research Field:
Publishing date:

Info

Title:
Physiological Mechanism of Exogenous Betaine and Calcium Chloride on Improving Cold Tolerance in Duranta repens
Author(s):
ZHANG Yongfu1; MO Liling1; NIU Yanfen1; PENG Shengjing1; WANG Dingkang2; GENG Kaiyou2
（1.School of Agriculture，Kunming University，Kunming,Yunnan 650214；2.Office of Science Research，Kunming University，Kunming,Yunnan 650214)
Keywords:
Duranta repens; betaine; calcium chloride; low temperature stress; cold resistance; physiological index
PACS:
-
DOI:
10.11937/bfyy.201608042
Abstract:
Taking the garden greening tree species Duranta repens as experimental material.Through different concentrations of betaine and calcium chloride treatment，relative conductance，the contents of soluble sugar and proline，the activities of superoxide dismutase (SOD) and peroxidase (POD)，oxygen free radical generation rate and hydrogen peroxide (H2O2) content were investigated on four different temperature conditions from -3℃ to 6℃.The results showed that the relative conductance，proline content，POD activity of eight treatments increased to varying degrees with the lowering of the temperature.Overall change trend of the soluble sugar content also increased.The SOD of all treatments activity increased first and then declined.In addition to -3℃，the oxygen free radical production rate and hydrogen peroxide content of each treatment also showed a trend of first increasing and then decreasing.The physiological indexes with close relation to the cold resistance of the eight treatments were relative conductance，proline content and oxygen free radical production rate.By the comprehensive evaluation with subordinate function，20 mmol/L calcium chloride and 20 mmol/L betaine+10 mmol/L calcium chloride treatments had the better effect on cold resistance of Duranta repens and the study for garden plant conservation could provide a theoretical guidance.

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Last Update: 2016-06-30