DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA
W iggins , I ra L. (Stanford U., Stanford, Calif.) Development of the ovule and megagametophyte in Saxifraga hieracifolia. Amer. Jour. Bot. 46(10): 692–697. Illus. 1059.—Buds of Saxifraga hieracifolia collected in the vicinity of Point Barrow, Alaska, fixed, sectioned, and stained by standard method...
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Online Access: | http://dx.doi.org/10.1002/j.1537-2197.1959.tb07072.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1959.tb07072.x https://onlinelibrary.wiley.com/doi/full/10.1002/j.1537-2197.1959.tb07072.x |
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crwiley:10.1002/j.1537-2197.1959.tb07072.x 2024-06-02T08:04:12+00:00 DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA Wiggins, Ira L. 1959 http://dx.doi.org/10.1002/j.1537-2197.1959.tb07072.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1959.tb07072.x https://onlinelibrary.wiley.com/doi/full/10.1002/j.1537-2197.1959.tb07072.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 46, issue 10, page 692-697 ISSN 0002-9122 1537-2197 journal-article 1959 crwiley https://doi.org/10.1002/j.1537-2197.1959.tb07072.x 2024-05-03T11:13:48Z W iggins , I ra L. (Stanford U., Stanford, Calif.) Development of the ovule and megagametophyte in Saxifraga hieracifolia. Amer. Jour. Bot. 46(10): 692–697. Illus. 1059.—Buds of Saxifraga hieracifolia collected in the vicinity of Point Barrow, Alaska, fixed, sectioned, and stained by standard methods, revealed that the archesporial cell in the ovule of this species is hypodermal and gives rise to the megaspore mother cell and a small number of parietal cells. Occasionally 2 megaspore mother cells occur within an ovule. Meiosis in the megaspore mother cell produces a linear tetrad of megaspores, the chalazal one of which normally gives rise to a monosporic, Polygonum‐ type megagametophyte. The polar nuclei fuse near the chalazal end of the megagametophyte and the antipodal cells disintegrate prior to fertilization. A distinct filiform apparatus and a marked lateral “spur” develop on each synergid. Vacuolation in the egg cell and in the synergids follows the usual pattern. Only a single integument surrounds the nucellus. Article in Journal/Newspaper Barrow Point Barrow Saxifraga hieracifolia Alaska Wiley Online Library American Journal of Botany 46 10 692 697 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
W iggins , I ra L. (Stanford U., Stanford, Calif.) Development of the ovule and megagametophyte in Saxifraga hieracifolia. Amer. Jour. Bot. 46(10): 692–697. Illus. 1059.—Buds of Saxifraga hieracifolia collected in the vicinity of Point Barrow, Alaska, fixed, sectioned, and stained by standard methods, revealed that the archesporial cell in the ovule of this species is hypodermal and gives rise to the megaspore mother cell and a small number of parietal cells. Occasionally 2 megaspore mother cells occur within an ovule. Meiosis in the megaspore mother cell produces a linear tetrad of megaspores, the chalazal one of which normally gives rise to a monosporic, Polygonum‐ type megagametophyte. The polar nuclei fuse near the chalazal end of the megagametophyte and the antipodal cells disintegrate prior to fertilization. A distinct filiform apparatus and a marked lateral “spur” develop on each synergid. Vacuolation in the egg cell and in the synergids follows the usual pattern. Only a single integument surrounds the nucellus. |
format |
Article in Journal/Newspaper |
author |
Wiggins, Ira L. |
spellingShingle |
Wiggins, Ira L. DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
author_facet |
Wiggins, Ira L. |
author_sort |
Wiggins, Ira L. |
title |
DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
title_short |
DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
title_full |
DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
title_fullStr |
DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
title_full_unstemmed |
DEVELOPMENT OF THE OVULE AND MEGAGAMETOPHYTE IN SAXIFRAGA HIERACIFOLIA |
title_sort |
development of the ovule and megagametophyte in saxifraga hieracifolia |
publisher |
Wiley |
publishDate |
1959 |
url |
http://dx.doi.org/10.1002/j.1537-2197.1959.tb07072.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1959.tb07072.x https://onlinelibrary.wiley.com/doi/full/10.1002/j.1537-2197.1959.tb07072.x |
genre |
Barrow Point Barrow Saxifraga hieracifolia Alaska |
genre_facet |
Barrow Point Barrow Saxifraga hieracifolia Alaska |
op_source |
American Journal of Botany volume 46, issue 10, page 692-697 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/j.1537-2197.1959.tb07072.x |
container_title |
American Journal of Botany |
container_volume |
46 |
container_issue |
10 |
container_start_page |
692 |
op_container_end_page |
697 |
_version_ |
1800748837233491968 |