The value of chemosystematics in clarifying relationships in the genistoid tribes of papilionoid legumes
نویسنده
چکیده
Taxonomic patterns in the distribution of alkaloids, phenolic compounds and cyanogenic glycosides in the genistoid group, which includes the tribes Brongniartieae, Genisteae, Thermopsideae, Crotalarieae, Podalyrieae, Euchresteae and part of the Sophoreae, are reviewed. Discontinuities in the distribution of secondary metabolites agree well with recent modifications to generic and tribal delimitations, and also with new phylogenetic hypotheses based on DNA sequence data. Examples of potential synapomorphies include the presence of quinolizidine alkaloids (genistoid group), Ormosia-type alkaloids (Ormosia group of Sophoreae, the Brongniartieae and Thermopsideae), absence of a-pyridone alkaloids (Podalyrieae, Crotalarieae and some Sophoreae), carboxylic acid esters of alkaloids (Cadia purpurea, Sophora inhambanensis and the Podalyrieae), quinolizidines of the matrine type (Euchresteae and Sophora species), 5-O-methylgenistein (Genisteae), vicenin-2 (Crotalarieae, Podalyrieae and some Sophoreae) and esters of cyanidin (purple-flowered Podalyrieae, excluding Hypocalyptus). Despite incomplete data and extensive homoplasy, secondary metabolites provide phylogenetic clues at all taxonomic levels. 2003 Elsevier Science Ltd. All rights reserved.
منابع مشابه
A phylogeny of legumes (Leguminosae) based on analysis of the plastid matK gene resolves many well-supported subclades within the family.
Phylogenetic analysis of 330 plastid matK gene sequences, representing 235 genera from 37 of 39 tribes, and four outgroup taxa from eurosids I supports many well-resolved subclades within the Leguminosae. These results are generally consistent with those derived from other plastid sequence data (rbcL and trnL), but show greater resolution and clade support overall. In particular, the monophyly ...
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Phylogenetic analysis of 330 plastid matK gene sequences, representing 235 genera from 37 of 39 tribes, and four outgroup taxa from eurosids I supports many well-resolved subclades within the Leguminosae. These results are generally consistent with those derived from other plastid sequence data (rbcL and trnL), but show greater resolution and clade support overall. In particular, the monophyly ...
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