干旱区生态环境知识资源中心(Arid): Ecophysiological aspects and photosynthetic pathways in 105 plants species in saline and arid environments of Tunisia

Arid

	Ecophysiological aspects and photosynthetic pathways in 105 plants species in saline and arid environments of Tunisia
	Atia Abdallah; Rabhi Mokded; Debez Ahmed; Abdelly Chedly; Gouia Houda; Haouari Chiraz Chaffei; Smaoui Abderrazak
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:6 页码:762-770
英文摘要	In Tunisian arid regions, plant life forms, ecotypes, physiological types and photosynthetic pathways(C_3, C_4 or CAM) remain unclear. Understanding the characters of these plant species could be important for land restoration. A literature survey was conducted for 105 plants species in arid regions of Tunisia. These plant species belong to several ecotypes: halophytes, xerophytes, gypsophytes, psamophytes, xero-halophytes, gypso-halophytes, psamo-halophytes, psamo-xerophytes, xero-gypsophytes and hygro-halophytes. The variation of photosynthetic pathway types in the 105 studied species shows that 56.2% were C_3, 41.0% were C_4, 1.9% were CAM and 1.0% were C_3-CAM. The C_3 pathway was more abundant in the halophytes, whereas the C_4 one was more common in the xerophytes, gypsophytes, gypso-halophytes and psamo-halophytes. The ratio of C_3 to C_4 species(C_3/C_4 ratio) was 0.2 in the psamo-halophytes, 0.8 in the gypso-halophytes, 1.1 in the xerophytes, 1.6 in the xero-halophytes, 1.8 in the hygrohalophytes, 2.0 in the psamophytes and 3.8 in the halophytes. The annuals were mainly C_3 plants whereas most of perennials were C_4 ones. The C_3/C_4ratio was 1.3 in succulent species and 1.4 in non-succulent species. Thus, succulence seems not to affect the distribution of C_3 and C_4 pathways within the studied plants. This investigation shows high percentages of C_4 plants occurred in Tunisian arid regions. However, there were significant differences in their abundance among ecotypes. Basing on C_3/C_4 ratio, we can find that the abundance of the C_4 pathway was in the following order: psamo-halophytes, gypso-halophytes, xerophytes, xero-halophytes, hygro-halophytes, psamophytes and halophytes. In Tunisian arid regions, C_4 species were most abundant in xerophytes and less abundant in halophytes. In the Chenopodiaceae the number of C_3 plants was 13 and the number of C_4 species was 20 and in the Poaceae the number of C_3 was 23 and the number of C_4 was 19 species. Thus, the most C_4 proportion was in the Chenopodiaceae and Poaceae species. This confirms the fact that the Chenopodiaceae and the Poaceae were the leading families that tolerate salinity and aridity.
英文关键词	C_3 C_4 CAM life form ecotype physiological type Tunisian arid regions
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5264388
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335415
作者单位	Atia Abdallah, Research Unit, Nutrition and Nitrogen Metabolism and Stress Protein, Department of Biology, Faculty of Sciences of Tunis, Campus Universitaire El Manar I, Tunis, 1060, Tunisia.; Gouia Houda, Research Unit, Nutrition and Nitrogen Metabolism and Stress Protein, Department of Biology, Faculty of Sciences of Tunis, Campus Universitaire El Manar I, Tunis, 1060, Tunisia.; Haouari Chiraz Chaffei, Research Unit, Nutrition and Nitrogen Metabolism and Stress Protein, Department of Biology, Faculty of Sciences of Tunis, Campus Universitaire El Manar I, Tunis, 1060, Tunisia.; Rabhi Mokded, Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria, Hammam-Lif, 2050, Tunisia.; Debez Ahmed, Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria, Hammam-Lif, 2050, Tunisia.; Abdelly Chedly, Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cedria, Hammam-Lif, 2050, Tunisia.; Smaoui Abderrazak, Laboratory of Extremophile Plants, Centre of Biotechnology of B...
推荐引用方式 GB/T 7714	Atia Abdallah,Rabhi Mokded,Debez Ahmed,et al. Ecophysiological aspects and photosynthetic pathways in 105 plants species in saline and arid environments of Tunisia[J],2014,6(6):762-770.
APA	Atia Abdallah.,Rabhi Mokded.,Debez Ahmed.,Abdelly Chedly.,Gouia Houda.,...&Smaoui Abderrazak.(2014).Ecophysiological aspects and photosynthetic pathways in 105 plants species in saline and arid environments of Tunisia.Journal of Arid Land,6(6),762-770.
MLA	Atia Abdallah,et al."Ecophysiological aspects and photosynthetic pathways in 105 plants species in saline and arid environments of Tunisia".Journal of Arid Land 6.6(2014):762-770.