Developmental evidence for stamen number reductionin populations of Hibbertia fasciculata (Dilleniaceae)

Autor:	S. C. Tucker, Peter Bernhardt
Rok vydání:	2003
Předmět:	Hibbertia fasciculata education.field_of_study biology Population Stamen Plant Science Dilleniaceae biology.organism_classification Hibbertia Plant ecology Botany Primordium education Ecology Evolution Behavior and Systematics Pollination ecology
Zdroj:	Plant Systematics and Evolution. 240:107-114
ISSN:	1615-6110 0378-2697
DOI:	10.1007/s00606-003-0010-5
Popis:	Discrete Australian populations of Hibbertia fasciculata R. Br. ex DC. differ in stamen number per flower: three to four in isolated, northeastern coastal populations in New South Wales vs. 10–12 in southeastern Australian populations. In all populations, the stamen bases are attached to three broad flat pedestals regardless of number of stamens present. In certain other Hibbertia species, each pedestal results from initiation via a common stamen primordium that usually produces at least 3–4 stamens per common primordium. In H. fasciculata, each of the three pedestals is associated with three to four stamens in flowers of southeastern populations, but with only one stamen per pedestal in the coastal populations of New South Wales. Because the pedestals (remnants of common primordia) have persisted, the evolutionary trend probably has been one of reduction in stamen number. General observations and comparative studies suggest that this population-based reduction series in stamen number (as well as reduced plant size and flower size) reflects a locally successful trend towards smaller organs throughout the plant body together with a shift in pollination ecology.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e9ecd0af73ca4e6ca0aa624f3df41e09 https://doi.org/10.1007/s00606-003-0010-5 Zobrazit plný text záznamu Plný text ve formátu PDF