Sex-related differences in morphological, physiological, and ultrastructural responses of Populus cathayana to chilling

	Sex-related differences in morphological, physiological, and ultrastructural responses of Populus cathayana to chilling
	Zhang, Sheng ; Jiang, Hao ; Peng, Shuming ; Korpelainen, Helena ; Li, Chunyang
刊名	JOURNAL OF EXPERIMENTAL BOTANY
	2011
卷号	62 期号:2 页码:675-686
关键词	Antioxidant enzymes chlorophyll low temperature photosynthesis sexual difference ultrastructure
ISSN号	0022-0957
通讯作者	Li, CY (reprint author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	Low temperature is one of the abiotic factors limiting plant growth and productivity. Yet, knowledge about sex-related responses to low temperature is very limited. In our study, the effects of low, non-freezing temperature on morphological, physiological, and ultrastructural traits of leaves in Populus cathayana Rehd. males and females were investigated. The results showed that 4 degrees C temperature caused a chilling stress, and females suffered from greater negative effects than did males. At the early growth stage of development, chilling (4 degrees C) significantly inhibited plant growth, decreased net photosynthesis rate (P(n)), stomatal conductance (g(s)), transpiration (E), and chlorophyll pigments (Chl), and increased intercellular CO(2) concentration (C(i)), chlorophyll a/b (Chl a/b), proline, soluble sugar and H(2)O(2) contents, and ascorbate peroxidase (APX) activity in both sexes, whereas peroxidase (POD) and glutathione reductase (GR) activities decreased and thiobarbituric acid reactive substance (TBARS) content increased only in females. Chilling stress also caused chloroplast changes and an accumulation of numerous plastoglobules and small vesicles in both sexes. However, disintegrated chloroplasts and numerous tilted grana stacks were only found in chilling-stressed females. Under chilling stress, males showed higher Chl and soluble sugar contents, and higher superoxide dismutase (SOD), POD, and GR activities than did females. In addition, males exhibited a better chloroplast structure and more intact plasma membranes than did females under chilling stress. These results suggest that sexually different responses to chilling are significant and males possess a better self-protection mechanism than do females in P. cathayana.
学科主题	Plant Sciences
收录类别	SCI
资助信息	National Natural Science Foundation of China[30930075]; Chinese Academy of Sciences[KSCX2-YW-Z-1019]; West Light Foundation of the Chinese Academy of Sciences
语种	英语
WOS记录号	WOS:000285625500022
公开日期	2012-11-09
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23463]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Zhang, Sheng,Jiang, Hao,Peng, Shuming,et al. Sex-related differences in morphological, physiological, and ultrastructural responses of Populus cathayana to chilling[J]. JOURNAL OF EXPERIMENTAL BOTANY,2011,62(2):675-686.
APA	Zhang, Sheng,Jiang, Hao,Peng, Shuming,Korpelainen, Helena,&Li, Chunyang.(2011).Sex-related differences in morphological, physiological, and ultrastructural responses of Populus cathayana to chilling.JOURNAL OF EXPERIMENTAL BOTANY,62(2),675-686.
MLA	Zhang, Sheng,et al."Sex-related differences in morphological, physiological, and ultrastructural responses of Populus cathayana to chilling".JOURNAL OF EXPERIMENTAL BOTANY 62.2(2011):675-686.