Photosynthetic pathways in Chenopodiaceae from Africa, Asia and Europe with their ecological, phytogeographical and taxonomical importance
Photosynthetic pathways in Chenopodiaceae from Africa, Asia and Europe with their ecological, phytogeographical and taxonomical importance
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DOI：
10.1007/bf00987948
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发表时间：
1997-01-01
影响因子：
1.9
通讯作者：
Ziegler, H
中科院分区：
文献类型：
--
作者：
Akhani, H;Trimborn, P;Ziegler, H
报道了来自非洲、亚洲和欧洲的305种藜科植物的光合作用途径。给出了所有物种的生态特征、植物地理特征和生活方式，并讨论了它们与相关co2固定类型的相关性。205种（67.2%）和100种（32.8%）采用c -4途径固定co2。大多数C-4种是伊朗-图兰起源。伊朗-图兰植物群落C-4种的多样性与夏季藜足类的活跃期有关。一些特殊的形态与各自的光合类型有密切的关系。具有关节茎的盐生植物和旱生植物以及重根型的茎多肉植物都是C-4，叶多肉盐生植物和干盐生植物主要是C-4。具有叶或茎多肉质的湿盐植物通常是C-3。在中新世气候变化之后，可能有许多C-4 salsolae在亚细亚干旱区进化。其中有很高比例的一年生植物具有较年轻的起源。研究结果表明，“Salsoboideae”亚科现今的藜足类可能在非洲北部有其古老的种群。我们发现C-3和C-4两种类型（如Atriplex和Suaeda）的光合途径与属内分类密切相关。
Photosynthetic pathways are reported for 305 species of Chenopodiaceae from Africa, Asia and Europe. Ecological characteristics, phytogeography and life forms of all species are given, and their correlation with relevant CO2-fixation types are discussed. 205 species (67.2%) exhibit the C-4-pathway and 100 species (32.8%) the C-3-pathway of CO2-fixation. Most of the C-4 species are of Irano-Turanian origin. The diversity of C-4 species of the Irano-Turanian phytochoria, with very harsh winters, are interpreted by the active period of Chenopods in summer. There is a close relationship between some special morphotypes and respective photosynthetic type. Halophytes and xerophytes with articulated stems and stem succulents of Anabasis-type are exclusively C-4 Leaf succulent halophytes and xerohalophytes are predominantly C-4. Hygrohalophytes with leaf or stem succulence are often C-3. Probably many C-4 Salsoleae have been evolved in the Afroasiatic arid zone after the climatic changes of the Miocene. Among them there is a high proportion of annuals that have a younger origin. There is some evidence that the present Chenopods of the subfamily ''Salsoboideae'' may have their ancient stock in NW Africa, We found close taxonomic relationships between photosynthetic pathways and infrageneric classification in genera with both types of C-3 and C-4, like Atriplex and Suaeda.