|Table of Contents|

Comprehensive Evaluation of Cold Resistance of Twenty Rhododendron Cultivars Under Cold Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年05
Page:
60-66
Research Field:
Publishing date:

Info

Title:
Comprehensive Evaluation of Cold Resistance of Twenty Rhododendron Cultivars Under Cold Stress
Author(s):
LIU Xumei; ZHAO Bing; SHEN Huifei; XU Jingjing; GAO Xiaoning
(College of Landscape Architecture and Arts，Northwest A&F University，Yangling，Shaanxi 712100)
Keywords:
Rhododendron; morphology characteristics; cold resistance; subordinate function
PACS:
-
DOI:
10.11937/bfyy.201705015
Abstract:
In order to understand the adaptation mechanism of Rhododendron to cold stress，under natural cold treatment for 20 days,20 Rhododendron cultivars were used as the test materials，which cold resistance was evaluated by measuring relative electrical conductivity，soluble sugar content，soluble protein content，MDA content of leaves，H2O2 content，POD activity，and SOD activity，and the growth morphology.By the method of subordinate function，comprehensive evaluation on the cold resistance of different Rhododendron cultivars was made.The results showed that the growth change of R.‘Hong Yue’ under cold stress was not obvious，and cold resistance was the best.Using the method of subordinate function weights coefficient of standard deviation，the cold resistence capacity of 20 Rhododendron cultivars was comprehensively evaluated，the cold resistance ability of R.‘Hong Yue’ was the best among 20 Rhododendron cultivars.Correlation analysis demonstrated that integrated assessment value of cold resistance had significant positive correlation with the content of soluble sugar (P<0.01) and superoxide dismutase (SOD) activity，had positive correlation with the contents of peroxidase (POD) activity，while had significant negative correlation with malondialdehyde (MDA) content（P<0.05)，and had negative correlation with the contents of soluble protein,and hydrogen peroxide (H2O2)content.The results indicated that，the comprehensive evaluation results was similar to results observed in morphological characteristics of leaves.The research provided important theoretical basis for the choice of Rhododendron species，which was used in different regions in landscape application.

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Last Update: 2017-03-24