|Table of Contents|

Effects of Heat Stress on Several Physiological Traits in Heat-yolerant and Heat-Sensitive Genotypes of Flowering Chinese Cabbage(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年01期
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Effects of Heat Stress on Several Physiological Traits in Heat-yolerant and Heat-Sensitive Genotypes of Flowering Chinese Cabbage
Author(s):
LI Rong-hua1;  GUO Pei-guo1;  ZHANG Hua2;  HUANG Hong-di2;  ZHENG Yan-song2;  XIA Yan-shi1
1.College of Life Sciences,Guangzhou University,Guangzhou,Guangdong 510006;?
2.Guangzhou Academy of Agricultural Sciences,Guangzhou,Guangdong 510308
Keywords:
flowering Chinese cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee);  heat stress;  osmolyte;  active oxygen;  scavenging
PACS:
S 634.5
DOI:
-
Abstract:
Four flowering chinese cabbage were selected as material, electrolytic leakage rate and the production and scavenging of active oxygen in the leaves of heat-tolerant and heat-sensitive genotypes of flowering Chinese cabbage under heat stress were studied. The results showed that most of traits including the contents of proline and betaine, electrolytic leakage rate, malondialdehyde (MDA) content, O-?2producing rate, H2O2 content, activities of superoxide dismutase (SOD) and peroxidase (POD) increased slightly and were not significant differences under the short (1 d) period of heat stress in four genotypes of flowering Chinese cabbage, except catalase (CAT) which its activity rapidly increased and reached the peak in two heat-sensitive genotypes under 1 d of heat stress. The values of these physiological traits continuously increased with different degree in four genotypes with stress time (3～7 d.), and showed that the betaine content, the activities of SOD, POD and CAT in heat-tolerant genotypes were significant higher than that in heat-sensitive genotypes, electrolytic leakage rate, MDA content, O-?2 producing rate and H2O2 content were significant lower than that in sensitive genotypes, while proline accumulation was not related to heat tolerance or heat sensitive in flowering Chinese cabbage under heat stress condition.

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Last Update: 2014-08-22