FLORAL SEX ALLOCATION IN SEQUENTIALLY BLOOMING PLANTS
نویسندگان
چکیده
منابع مشابه
Floral Sex Allocation in Sequentially Blooming Plants.
In plants whose flowers develop in a sequence, different flowers may exhibit temporal variation in pollen donation and receipt such that the fitness contributions through male and female functions can vary among flowers. Dichogamy, or directional pollinator movements within inflorescences, can create situations where flowers in different stages in the sequence may differ in the numbers of flowe...
متن کاملVariation in floral sex allocation and reproductive success in sequentially flowering inflorescence of Corydalis remota var. lineariloba (Fumariaceae).
In hermaphroditic plants, female reproductive success often varies among different positions within an inflorescence. However, few studies have evaluated the relative importance of underlying causes such as pollen limitation, resource limitation or architectural effect, and few have compared male allocation. During a 2-year investigation, we found that female reproductive success of an acropeta...
متن کاملVariation in floral sex allocation in Polygonatum odoratum (Liliaceae).
BACKGROUND AND AIMS It is well known that resource allocation to male and female functions can be highly variable in hermaphroditic plants. The purpose of this study was to investigate variations in sexual investment at different levels (flower, plant and population) in Polygonatum odoratum, a plant with sequentially opening flowers. METHODS Pollen and ovule production in base, middle and top...
متن کاملSkewed paternity and sex allocation in hermaphroditic plants and animals.
Models predict a reduced allocation to sperm when females preferentially use one of two males' sperm and the males do not know who is favoured. An analogous discounting occurs in plants when their paternity success is skewed by random, non-heritable factors such as location in the population and pollinator behaviour. We present a model that shows that skewed paternity can affect the sex allocat...
متن کاملPlasticity of floral sex allocation within inflorescences of hermaphrodite Aconitum gymnandrum
Aims sex allocation in plants is often plastic, enabling individuals to adjust to variable environments. However, the predicted malebiased sex allocation in response to low resource conditions has rarely been experimentally tested in hermaphroditic plants. in particular, it is unknown whether distal flowers in linear inflorescences show a larger shift to male allocation relative to basal flower...
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ژورنال
عنوان ژورنال: Evolution
سال: 1995
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1995.tb05959.x