LEAF PHYSIOLOGICAL AND ANATOMICAL CHARACTERISTICS OF TWO INDICATOR SPECIES IN THE LIMESTONE REGION OF SOUTHERN CHINA UNDER DROUGHT STRESS

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 生物多样性与生态系统服务领域 > 中国科学院环境与应用微生物重点实验室

	LEAF PHYSIOLOGICAL AND ANATOMICAL CHARACTERISTICS OF TWO INDICATOR SPECIES IN THE LIMESTONE REGION OF SOUTHERN CHINA UNDER DROUGHT STRESS
	Wu, Yongbin 1; Hong, Wenjun 2; Chen, Youhua 3
刊名	PAKISTAN JOURNAL OF BOTANY
	2018-08-01
卷号	50 期号:4 页码:1335-1342
关键词	Limestone region Drought stress Stress-resistance physiology Leaf anatomy
ISSN号	0556-3321
产权排序	3
文献子类	Article
英文摘要	Drought is a critical limiting factor of plant growth, and plants living in arid areas must develop adaptation mechanisms to resist drought stress. In this study, we studied the drought resistance mechanisms of two tree species, Triadica rotundifolia and Cinnamomum burmannii, based on their foliar physiological and anatomical characteristics. These trees are indicator plants in the limestone region of southern China. We evaluated and compared the changes in the contents of chlorophyll, soluble protein, soluble sugars, proline, malondialdehyde (MDA), proline, activity of superoxide dismutase (SOD) and peroxidase (POD), chlorophyll fluorescence parameters, and leaf anatomical structure between these two species. The results showed the following. (1) The content of Chl(a+b), soluble protein, soluble sugar and SOD activity of the two species' seedlings had an increasing trend at first and then a decrease over the entire drought experiment. The change in MDA content was more sensitive in T. rotundifolia, and the peak (33.05 mmol.ml(-1)) appeared on the 28th day of the drought experiment. Comparatively, the proline content and POD activity were more sensitive in C. burmannii, and the proline peak (217.11 mu g.g(-1)) appeared on the 24th day. (2) Under the continuous drought stress, the electron transport rate of the seedlings decreased, whereas the non-photochemical quenching showed different trends for the different species. Severe drought stress in T. rotundifolia caused an increasing trend in the light energy capture efficiency (F-v/F-m), while it declined continuously in C. burmannii. (3) Under the drought stress, the leaves of T. rotundifolia became thicker. The arrangement of spongy tissues became loose, and the ratio of palisade to spongy tissue decreased. However, the leaves of C. burmannii showed a few different features, such as inconspicuous differentiation between palisade and spongy tissues, a high loose degree of leaves, and low packing. (4) The leaf physiological indices had a strong relationship with the anatomy characteristics, as revealed by principal component analysis (PCA); the adaptability to drought tolerance of T rotundifolia was stronger than C. burmannii. In conclusion, T rotundifolia is better able to adapt to drought conditions due to its physiological and anatomical characteristics, which allow the species to better buffer drought-induced physiological responses and variability in leaf structure.
学科主题	Plant Sciences
URL标识	查看原文
WOS关键词	CHLOROPHYLL FLUORESCENCE ; OSMOTIC ADJUSTMENT ; GAS-EXCHANGE ; PLANTS ; PHOTOSYNTHESIS ; TOLERANCE ; TRAITS ; LEAVES ; LIGHT
WOS研究方向	Plant Sciences
语种	英语
出版者	PAKISTAN BOTANICAL SOC
WOS记录号	WOS:000433390500011
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30199]
专题	食品安全与环境治理领域_中国科学院环境与应用微生物重点实验室
作者单位	1.South China Agr Univ, Coll Forestry & Landscape Architecture, South China Limestone Plants Res Ctr, Guangzhou, Guangdong, Peoples R China; 2.Sanya Acad Forestry, Sanya 572000, Hainan, Peoples R China; 3.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yongbin,Hong, Wenjun,Chen, Youhua. LEAF PHYSIOLOGICAL AND ANATOMICAL CHARACTERISTICS OF TWO INDICATOR SPECIES IN THE LIMESTONE REGION OF SOUTHERN CHINA UNDER DROUGHT STRESS[J]. PAKISTAN JOURNAL OF BOTANY,2018,50(4):1335-1342.
APA	Wu, Yongbin,Hong, Wenjun,&Chen, Youhua.(2018).LEAF PHYSIOLOGICAL AND ANATOMICAL CHARACTERISTICS OF TWO INDICATOR SPECIES IN THE LIMESTONE REGION OF SOUTHERN CHINA UNDER DROUGHT STRESS.PAKISTAN JOURNAL OF BOTANY,50(4),1335-1342.
MLA	Wu, Yongbin,et al."LEAF PHYSIOLOGICAL AND ANATOMICAL CHARACTERISTICS OF TWO INDICATOR SPECIES IN THE LIMESTONE REGION OF SOUTHERN CHINA UNDER DROUGHT STRESS".PAKISTAN JOURNAL OF BOTANY 50.4(2018):1335-1342.