Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.

<p>In this study, the development of male reproductive organ was analysed in <em>Crataegus tanacetifolia</em> (Lam.) Pers., endemic to Turkey. Androecium is composed of 20 stamens which are attached at the base of the filaments. The anther wall formation follows the dicotyledonous...

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Main Authors: Aslıhan ÇETİNBAŞ, Meral ÜNAL
Format: Article
Language:English
Published: AcademicPres 2015-12-01
Series:Notulae Botanicae Horti Agrobotanici Cluj-Napoca
Online Access:http://www.notulaebotanicae.ro/index.php/nbha/article/view/9880
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spelling doaj-2689c95ca0db4dc49d5bc4b3d5d0e37e2021-05-02T03:00:32ZengAcademicPresNotulae Botanicae Horti Agrobotanici Cluj-Napoca0255-965X1842-43092015-12-0143250751410.15835/nbha.43.2.98808079Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.Aslıhan ÇETİNBAŞ0Meral ÜNAL1Marmara University, Department of Biology, 34722, IstanbulMarmara University, Department of Biology, 34722, Istanbul<p>In this study, the development of male reproductive organ was analysed in <em>Crataegus tanacetifolia</em> (Lam.) Pers., endemic to Turkey. Androecium is composed of 20 stamens which are attached at the base of the filaments. The anther wall formation follows the dicotyledonous type. The undifferentiated anther is ovoid-shaped, and the differentiation starts with the appearance of archesporial cells. Mature anthers are dorsifix and tetrasporangiate. The anther wall is composed of an epidermis, endothecium, two or three rows of middle layers and secretory tapetum. Endothecial cells show fibrous thickening. Tapetum is characterized by enlarged secretory types with binucleate cells, which presented an intense reaction with regard to proteins, insoluble polysaccharides and lipids. Features of chromatin condensation and nucleus disorders identified with the application of DAPI (4´,6-diaminido-2-phenylindole) point out programmed cell death. Epidermal and endothecial layers remain intact until anther dehiscence; however, middle layer and tapetum disappear during development. At the end of regular meiotic division, tetrahedral microspore tetrads are formed. Pollen grains are tricolparatae, tectate and sphaeroidea. Exine is made up of lipoidal substances and proteins, but the intine includes insoluble polysaccharides. Further, cytoplasm of pollen grains are rich in proteins, lipids and insoluble polysaccharides.</p>http://www.notulaebotanicae.ro/index.php/nbha/article/view/9880
collection DOAJ
language English
format Article
sources DOAJ
author Aslıhan ÇETİNBAŞ
Meral ÜNAL
spellingShingle Aslıhan ÇETİNBAŞ
Meral ÜNAL
Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
Notulae Botanicae Horti Agrobotanici Cluj-Napoca
author_facet Aslıhan ÇETİNBAŞ
Meral ÜNAL
author_sort Aslıhan ÇETİNBAŞ
title Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
title_short Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
title_full Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
title_fullStr Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
title_full_unstemmed Developmental and Cytochemical Features of Male Reproductive Organ in <i>Crataegus tanacetifolia</i> (Lam.) Pers.
title_sort developmental and cytochemical features of male reproductive organ in <i>crataegus tanacetifolia</i> (lam.) pers.
publisher AcademicPres
series Notulae Botanicae Horti Agrobotanici Cluj-Napoca
issn 0255-965X
1842-4309
publishDate 2015-12-01
description <p>In this study, the development of male reproductive organ was analysed in <em>Crataegus tanacetifolia</em> (Lam.) Pers., endemic to Turkey. Androecium is composed of 20 stamens which are attached at the base of the filaments. The anther wall formation follows the dicotyledonous type. The undifferentiated anther is ovoid-shaped, and the differentiation starts with the appearance of archesporial cells. Mature anthers are dorsifix and tetrasporangiate. The anther wall is composed of an epidermis, endothecium, two or three rows of middle layers and secretory tapetum. Endothecial cells show fibrous thickening. Tapetum is characterized by enlarged secretory types with binucleate cells, which presented an intense reaction with regard to proteins, insoluble polysaccharides and lipids. Features of chromatin condensation and nucleus disorders identified with the application of DAPI (4´,6-diaminido-2-phenylindole) point out programmed cell death. Epidermal and endothecial layers remain intact until anther dehiscence; however, middle layer and tapetum disappear during development. At the end of regular meiotic division, tetrahedral microspore tetrads are formed. Pollen grains are tricolparatae, tectate and sphaeroidea. Exine is made up of lipoidal substances and proteins, but the intine includes insoluble polysaccharides. Further, cytoplasm of pollen grains are rich in proteins, lipids and insoluble polysaccharides.</p>
url http://www.notulaebotanicae.ro/index.php/nbha/article/view/9880
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