Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)

Unreduced gametes are the key source for the natural polyploidization in plants, but process of its formation is very low in nature. Meiotic mutants are second source for the formation of 2n pollen. In this cytological investigation, the meiotic aberrations and its impact on post-meiotic products w...

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Autor principal:	harshita dwivedi
Formato:	article
Lenguaje:	EN
Publicado:	Firenze University Press 2021
Materias:	Unreduced gametes, 2n pollen, polyploidy, colchicine, meiotic aberrations, Trachyspermum ammi (L.) Sprague Biology (General) QH301-705.5 Cytology QH573-671
Acceso en línea:	https://doaj.org/article/1538ca236be94f68b14a528530acd6af
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spelling	oai:doaj.org-article:1538ca236be94f68b14a528530acd6af2021-11-28T20:31:41ZColchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)0008-71142165-5391https://doaj.org/article/1538ca236be94f68b14a528530acd6af2021-11-01T00:00:00Zhttps://riviste.fupress.net/index.php/caryologia/article/view/1113https://doaj.org/toc/0008-7114https://doaj.org/toc/2165-5391 Unreduced gametes are the key source for the natural polyploidization in plants, but process of its formation is very low in nature. Meiotic mutants are second source for the formation of 2n pollen. In this cytological investigation, the meiotic aberrations and its impact on post-meiotic products were analysed in autotetraploid Trachyspermum ammi (L.) Sprague (4n=36). The seedlings of T. ammi (L.) Sprague were treated with 3 different concentrations of colchicine (0.2, 0.4 and 0.5%, w/v) for 3 different durations. Six polyploid plants were induced which was confirmed on the basis of cytological analysis. Colchicine, an anti-microtubular drug induced different meiotic and post-meiotic abnormalities such as chromosomal bridges, lagging chromosomes, scattering, precocious, fragments, dyads, triads, and polyads. The formation of several abnormal sporads clearly signifies the meiotic restitution. The tendency of univalents to scattered in the cytoplasm at metaphase was identified as a peculiar aberration asynapsis. Pollen variability and fusion of pollen walls was reported and pollen fertility was calculated. The morphological analysis of the pollen allowed us to confirm the occurrence of 2n pollen. harshita dwivediFirenze University PressarticleUnreduced gametes, 2n pollen, polyploidy, colchicine, meiotic aberrations, Trachyspermum ammi (L.) SpragueBiology (General)QH301-705.5CytologyQH573-671ENCaryologia (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Unreduced gametes, 2n pollen, polyploidy, colchicine, meiotic aberrations, Trachyspermum ammi (L.) Sprague Biology (General) QH301-705.5 Cytology QH573-671
spellingShingle	Unreduced gametes, 2n pollen, polyploidy, colchicine, meiotic aberrations, Trachyspermum ammi (L.) Sprague Biology (General) QH301-705.5 Cytology QH573-671 harshita dwivedi Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
description	Unreduced gametes are the key source for the natural polyploidization in plants, but process of its formation is very low in nature. Meiotic mutants are second source for the formation of 2n pollen. In this cytological investigation, the meiotic aberrations and its impact on post-meiotic products were analysed in autotetraploid Trachyspermum ammi (L.) Sprague (4n=36). The seedlings of T. ammi (L.) Sprague were treated with 3 different concentrations of colchicine (0.2, 0.4 and 0.5%, w/v) for 3 different durations. Six polyploid plants were induced which was confirmed on the basis of cytological analysis. Colchicine, an anti-microtubular drug induced different meiotic and post-meiotic abnormalities such as chromosomal bridges, lagging chromosomes, scattering, precocious, fragments, dyads, triads, and polyads. The formation of several abnormal sporads clearly signifies the meiotic restitution. The tendency of univalents to scattered in the cytoplasm at metaphase was identified as a peculiar aberration asynapsis. Pollen variability and fusion of pollen walls was reported and pollen fertility was calculated. The morphological analysis of the pollen allowed us to confirm the occurrence of 2n pollen.
format	article
author	harshita dwivedi
author_facet	harshita dwivedi
author_sort	harshita dwivedi
title	Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
title_short	Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
title_full	Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
title_fullStr	Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
title_full_unstemmed	Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)
title_sort	colchicine induced manifestation of abnormal male meiosis and 2n pollen in trachyspermum ammi (l.) sprague (apiaceae)
publisher	Firenze University Press
publishDate	2021
url	https://doaj.org/article/1538ca236be94f68b14a528530acd6af
work_keys_str_mv	AT harshitadwivedi colchicineinducedmanifestationofabnormalmalemeiosisand2npollenintrachyspermumammilspragueapiaceae
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Colchicine induced manifestation of abnormal male meiosis and 2n pollen in Trachyspermum ammi (L.) Sprague (Apiaceae)

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