Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae)
To reveal the causes for absence of fruits and seeds in Jasminum nudiflorum Lindl. (Oleaceae) in the Southern Coast of the Crimea, the male generative sphere genesis has been studied and the male gametophyte state during the period of mass blossoming has been determined. The analysis of the permanen...
| Autor principal: | |
|---|---|
| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
Kazan Federal University
2018-09-01
|
| coleção: | Учёные записки Казанского университета: Серия Естественные науки |
| Assuntos: | |
| Acesso em linha: | https://kpfu.ru/development-of-the-male-generative-sphere-in_382403.html |
| _version_ | 1826908631689330688 |
|---|---|
| author | T.N. Kuzmina |
| author_facet | T.N. Kuzmina |
| author_sort | T.N. Kuzmina |
| collection | DOAJ |
| description | To reveal the causes for absence of fruits and seeds in Jasminum nudiflorum Lindl. (Oleaceae) in the Southern Coast of the Crimea, the male generative sphere genesis has been studied and the male gametophyte state during the period of mass blossoming has been determined. The analysis of the permanent preparations of flower buds of J. nudiflorum at different stages of development has demonstrated that the anther wall develops by the centrifugal type. The developed anther wall is formed by epidermis, endothecium, two or three middle layers, and multi-layer tapetum of the secretory type. The sporogenous tissue is represented by two layers of cells. Microsporogenesis is simultaneous. Obliteration of middle layers and tapetum begins at the stage of microsporogenesis. The mature anther of J. nudiflorum contains a three-celled pollen grain and its wall is composed of epidermis covered with cuticle, an irregular two-layered endothecium with fibrous bands.
The cytomorphological analysis of the average samples of J. nudiflorum pollen has shown that the proportion of morphologically normal pollen grains makes about 85% during the period of mass blossoming, thereby indicating the genetic stability of this type and the potential ability of the male gametophyte to fertilize efficiently. At the same time, freezing temperatures during the blossoming period of J. nudiflorum affect severely the state of the male gametophyte. The high proportion of morphologically normal pollen grains in J. nudiflorum excludes in the fertility of a male gametophyte a whole number of potential factors influencing the development of seeds in this sort of flowers and provides the grounds for analysis of its generative sphere peculiarities. |
| first_indexed | 2024-03-13T07:14:09Z |
| format | Article |
| id | doaj.art-add1976dc5f047b19c0adb259c275a5a |
| institution | Directory Open Access Journal |
| issn | 2542-064X 2500-218X |
| language | English |
| last_indexed | 2025-02-17T09:26:49Z |
| publishDate | 2018-09-01 |
| publisher | Kazan Federal University |
| record_format | Article |
| series | Учёные записки Казанского университета: Серия Естественные науки |
| spelling | doaj.art-add1976dc5f047b19c0adb259c275a5a2025-01-02T11:37:32ZengKazan Federal UniversityУчёные записки Казанского университета: Серия Естественные науки2542-064X2500-218X2018-09-011603436444Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae)T.N. Kuzmina0Nikitsky Botanical Garden – National Scientific Center of Russian Academy of Sciences, Yalta, 298648 RussiaTo reveal the causes for absence of fruits and seeds in Jasminum nudiflorum Lindl. (Oleaceae) in the Southern Coast of the Crimea, the male generative sphere genesis has been studied and the male gametophyte state during the period of mass blossoming has been determined. The analysis of the permanent preparations of flower buds of J. nudiflorum at different stages of development has demonstrated that the anther wall develops by the centrifugal type. The developed anther wall is formed by epidermis, endothecium, two or three middle layers, and multi-layer tapetum of the secretory type. The sporogenous tissue is represented by two layers of cells. Microsporogenesis is simultaneous. Obliteration of middle layers and tapetum begins at the stage of microsporogenesis. The mature anther of J. nudiflorum contains a three-celled pollen grain and its wall is composed of epidermis covered with cuticle, an irregular two-layered endothecium with fibrous bands. The cytomorphological analysis of the average samples of J. nudiflorum pollen has shown that the proportion of morphologically normal pollen grains makes about 85% during the period of mass blossoming, thereby indicating the genetic stability of this type and the potential ability of the male gametophyte to fertilize efficiently. At the same time, freezing temperatures during the blossoming period of J. nudiflorum affect severely the state of the male gametophyte. The high proportion of morphologically normal pollen grains in J. nudiflorum excludes in the fertility of a male gametophyte a whole number of potential factors influencing the development of seeds in this sort of flowers and provides the grounds for analysis of its generative sphere peculiarities.https://kpfu.ru/development-of-the-male-generative-sphere-in_382403.htmljasminum nudiflorumoleaceaeanthermicrosporangiumtapetumendotheciumpollen grain |
| spellingShingle | T.N. Kuzmina Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) Учёные записки Казанского университета: Серия Естественные науки jasminum nudiflorum oleaceae anther microsporangium tapetum endothecium pollen grain |
| title | Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) |
| title_full | Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) |
| title_fullStr | Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) |
| title_full_unstemmed | Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) |
| title_short | Development of the male generative sphere in Jasminum nudiflorum Lindl. (Oleaceae) |
| title_sort | development of the male generative sphere in jasminum nudiflorum lindl oleaceae |
| topic | jasminum nudiflorum oleaceae anther microsporangium tapetum endothecium pollen grain |
| url | https://kpfu.ru/development-of-the-male-generative-sphere-in_382403.html |
| work_keys_str_mv | AT tnkuzmina developmentofthemalegenerativesphereinjasminumnudiflorumlindloleaceae |