Embryo sac and microsporangium development in Pandanus (pandanaceae)
Mega- and micro-sporogenesis in Pandanus parvus is described, with some ancillary observations from other species. The conclusions of Fagerlind (1940) are corroborated. The ovule is in contact with the atmosphere by means of the hair-lined stigmatic channel; it is anatropous and crassinucellate. The...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Scientific Publishers
1975
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/39014/ http://psasir.upm.edu.my/id/eprint/39014/1/aar%20159%20Embryo%20Sac%20And%20Microsporangium%20Development%20In.pdf |
| _version_ | 1848849030752239616 |
|---|---|
| author | Cheah, C. H. Stone, B. C. |
| author_facet | Cheah, C. H. Stone, B. C. |
| author_sort | Cheah, C. H. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Mega- and micro-sporogenesis in Pandanus parvus is described, with some ancillary observations from other species. The conclusions of Fagerlind (1940) are corroborated. The ovule is in contact with the atmosphere by means of the hair-lined stigmatic channel; it is anatropous and crassinucellate. The embryo sac is of monosporic origin and at maturity contains the usual 8 nuclei supplemented by supernumsrary and presumably diploid nucellar nuclei which 'migrate' into the sac from the nucellar tissue of the chalazal region. It is possible that
they may contribute to the occurrence of parthenocarpy, and the vpossible occurrence of agamospermy. A hypostase is present. The development of the microsporangium is normal for angiosperms. The pollen grains are binucleate.
|
| first_indexed | 2025-11-15T09:43:55Z |
| format | Article |
| id | upm-39014 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:43:55Z |
| publishDate | 1975 |
| publisher | Scientific Publishers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-390142015-07-09T02:43:23Z http://psasir.upm.edu.my/id/eprint/39014/ Embryo sac and microsporangium development in Pandanus (pandanaceae) Cheah, C. H. Stone, B. C. Mega- and micro-sporogenesis in Pandanus parvus is described, with some ancillary observations from other species. The conclusions of Fagerlind (1940) are corroborated. The ovule is in contact with the atmosphere by means of the hair-lined stigmatic channel; it is anatropous and crassinucellate. The embryo sac is of monosporic origin and at maturity contains the usual 8 nuclei supplemented by supernumsrary and presumably diploid nucellar nuclei which 'migrate' into the sac from the nucellar tissue of the chalazal region. It is possible that they may contribute to the occurrence of parthenocarpy, and the vpossible occurrence of agamospermy. A hypostase is present. The development of the microsporangium is normal for angiosperms. The pollen grains are binucleate. Scientific Publishers 1975-06 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/39014/1/aar%20159%20Embryo%20Sac%20And%20Microsporangium%20Development%20In.pdf Cheah, C. H. and Stone, B. C. (1975) Embryo sac and microsporangium development in Pandanus (pandanaceae). Phytomorphology, 25 (2). pp. 228-238. ISSN 0031-9449 |
| spellingShingle | Cheah, C. H. Stone, B. C. Embryo sac and microsporangium development in Pandanus (pandanaceae) |
| title | Embryo sac and microsporangium development in Pandanus (pandanaceae)
|
| title_full | Embryo sac and microsporangium development in Pandanus (pandanaceae)
|
| title_fullStr | Embryo sac and microsporangium development in Pandanus (pandanaceae)
|
| title_full_unstemmed | Embryo sac and microsporangium development in Pandanus (pandanaceae)
|
| title_short | Embryo sac and microsporangium development in Pandanus (pandanaceae)
|
| title_sort | embryo sac and microsporangium development in pandanus (pandanaceae) |
| url | http://psasir.upm.edu.my/id/eprint/39014/ http://psasir.upm.edu.my/id/eprint/39014/1/aar%20159%20Embryo%20Sac%20And%20Microsporangium%20Development%20In.pdf |