Morph-specific correlations between floral traits in a distylous Ophiorrhiza napoensis (Rubiaceae) population in southern China

Citation
H. Kudoh et al., Morph-specific correlations between floral traits in a distylous Ophiorrhiza napoensis (Rubiaceae) population in southern China, J TROP ECOL, 17, 2001, pp. 719-728
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF TROPICAL ECOLOGY
ISSN journal
0266-4674 → ACNP
Volume
17
Year of publication
2001
Part
5
Pages
719 - 728
Database
ISI
SICI code
0266-4674(200109)17:<719:MCBFTI>2.0.ZU;2-3
Abstract
Floral trait correlations were compared between the two flower morphs of a distylous Ophiorrhiza napoensis population in a subtropical evergreen fores t at the Defu Natural Animal Preserve, Guangxi, China. Common principal com ponent analyses indicated that overall patterns in correlations among flora l traits were morph specific in the study population. Strong positive corre lations (r > 0.9) between anther height and corolla-tube length were found in both morphs. Stigma height correlated positively with corolla-tube lengt h in the long-styled morph (r = 0.843), but not in the short-styled morph ( r = -0.018). Flower-morph-specific correlation suggests that natural select ion by pollinators has moulded trait covariance among floral traits. Becaus e morph-specific correlations are expressed as the patterns of within-morph variation among multiple traits, putative genes responsible for the stigma -corolla tube correlation should not link to the supergene for sex-organ re ciprocity between the morphs, but their expression is limited in the long-s tyled morph.