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dc.contributor.author
Singh, Sweety
dc.contributor.author
Chauhan, Seema
dc.contributor.author
Galetto, Leonardo
dc.date.available
2017-07-24T20:06:25Z
dc.date.issued
2009-01
dc.identifier.citation
Singh, Sweety; Chauhan, Seema; Galetto, Leonardo; Reproductive biology of Pyrostegia venusta (Ker-Gawl.) Miers (Bignoniaceae) with special reference to seedlessness; The Society of Plant Reproductive Biology; The Journal of Plant Reproductive Biology; 1; 1; 1-2009; 87-92
dc.identifier.issn
0975-4296
dc.identifier.uri
http://hdl.handle.net/11336/21218
dc.description.abstract
Pyrostegia venusta (Ker-Gawl.) Miers syn. Bignonia venusta (Bignoniaceae), commonly known as “orange trumpet creeper”, “flame vine” or “golden shower” bears large number of orange tubular flowers arranged in dichasial cyme. There are four didynamous stamens and the gynoecium is bicarpillary, syncarpous with bilocular ovary, long style and bilabiate stigma. Various floral-polymorphic features e.g. increased number of stamens and stigmatic lobes and heterostyly are recorded. Flowers open in the morning between 6.00–7.30 and remain open throughout the day and corolla abscises 12-14 h after anthesis. The flowers are protandrous as the stamens dehisce 1-2 h after their opening. A circular nectariferous tissue is present at the base of the ovary, secreting copious nectar throughout the life of flower. The stigma becomes receptive in the afternoon between 3.00 – 4.30 pm. However, the stigmatic lobes close down by various kinds of stimuli including self pollen, but reopens after some time. Only the honeybees, small bees and black ants visit the flowers, but are not effective pollinators as pollen grains on the stigmatic surface are either absent or only a few of them are present. Various hand pollination experiments conducted failed to produce fruits indicating that the plant is self-incompatible. The hand pollinated stigmatic surface shows only 2-3% pollen germination with small pollen tubes which fail to reach the ovules may be due to low temperature during the flowering period. Pollen-ovule ratio indicates that its facultative xenogamous nature.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
The Society of Plant Reproductive Biology
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Biologia Reproductiva
dc.subject.classification
Ciencias de las Plantas, Botánica
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Reproductive biology of Pyrostegia venusta (Ker-Gawl.) Miers (Bignoniaceae) with special reference to seedlessness
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-13T18:26:22Z
dc.identifier.eissn
2249-7390
dc.journal.volume
1
dc.journal.number
1
dc.journal.pagination
87-92
dc.journal.pais
India
dc.journal.ciudad
Agra
dc.description.fil
Fil: Singh, Sweety. Dr. B.R. Ambedkar University. School of Life Sciences. Department of Botany; India
dc.description.fil
Fil: Chauhan, Seema. Dr. B.R. Ambedkar University. School of Life Sciences. Department of Botany; India
dc.description.fil
Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina
dc.journal.title
The Journal of Plant Reproductive Biology
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