Premium
DISTRIBUTION OF KRANZ SYNDROME AMONG ASTERACEAE
Author(s) -
Smith Bruce N.,
Turner B. L.
Publication year - 1975
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1975.tb14082.x
Subject(s) - biology , asteraceae , heliantheae , phyletic gradualism , botany , genus , taxon , phylogenetics , genetics , gene
A broad survey of the Asteraceae, involving visual characters, was undertaken to ascertain the occurrence of possible Kranz‐type (C 4 ) plants. One hundred and seven taxa representing 51 genera were examined by mass spectrometry for their 13 C/ 12 C ratios in dried leaf tissue. Species possessing the high 13 C/ 12 C ratio typical of the Kranz syndrome were found in genera belonging to the following tribes: Heliantheae (subtribe Coreopsideae)— Chrysanthellum (4 spp.), Eryngiophyllum (1 sp.), Glossocardia (1 sp.), Glossogyne (1 sp.), Isostigma (5 spp.); Tageteae— Pectis (21 spp.); and Helenieae— Flaveria (4 spp.). The only genus to possess both C 3 and C 4 species was Flaveria in which all but four species appear to possess a C 3 ‐type metabolism. When appropriate, the phyletic input of these data is discussed.