Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae)
This paper presents a comparative description of the starch distribution in the anthers, microspores and pollen grains of Aechmea recurvata, Dyckia racinae and Tillandsia aeranthos. Flowers at different stages of development were processed according to plant microtechniques for observation by light...
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2015-03-01
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doaj-013f45ca33d3415e94d98436b4c85cef2020-11-24T23:48:38ZengSociedade Botânica do BrasilActa Botânica Brasílica1677-941X2015-03-0129110311210.1590/0102-33062014abb3698S0102-33062015000100103Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae)João Marcelo Santos de OliveiraMerielem Saldanha MartinsMariane Paludette DornelesCesar Carvalho de FreitasThis paper presents a comparative description of the starch distribution in the anthers, microspores and pollen grains of Aechmea recurvata, Dyckia racinae and Tillandsia aeranthos. Flowers at different stages of development were processed according to plant microtechniques for observation by light microscope. Ten stages of embryological development were used as references for the comparative analysis of starch distribution and dynamics. The structural data showed a greater starch accumulation in the parietal layers and connective of D. racinae. It was observed that in the species studied, starch began to accumulate in microspore mother cell stage. The pollen grains in D. racinae and in T. aeranthos present two amylogenesis-amylolysis cycles, while A. recurvata presents only one. One amylogenesis-amylolysis cycle occurs in the parietal layers and/or connective tissue in all three species. The pollen grains in the three species are dispersed without starch and are characterized as the starchless type. Starch dynamics presents a close relation to the development of sporangia, microspores and pollen grains. It is believed that differences in the starch distribution and accumulation are related to the abiotic factors where the species are found.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100103&lng=en&tlng=encarbohydratesdevelopmentmicrogametogenesismicrosporogenesissporangium |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
João Marcelo Santos de Oliveira Merielem Saldanha Martins Mariane Paludette Dorneles Cesar Carvalho de Freitas |
spellingShingle |
João Marcelo Santos de Oliveira Merielem Saldanha Martins Mariane Paludette Dorneles Cesar Carvalho de Freitas Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) Acta Botânica Brasílica carbohydrates development microgametogenesis microsporogenesis sporangium |
author_facet |
João Marcelo Santos de Oliveira Merielem Saldanha Martins Mariane Paludette Dorneles Cesar Carvalho de Freitas |
author_sort |
João Marcelo Santos de Oliveira |
title |
Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) |
title_short |
Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) |
title_full |
Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) |
title_fullStr |
Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) |
title_full_unstemmed |
Starch distribution in anthers, microspores and pollen grains in Aechmea recurvata (Klotzsch.) L.B.Sm., Dyckia racinae L.B.Sm. and Tillandsia aeranthos (Loisel.) L.B.Sm. (Bromeliaceae) |
title_sort |
starch distribution in anthers, microspores and pollen grains in aechmea recurvata (klotzsch.) l.b.sm., dyckia racinae l.b.sm. and tillandsia aeranthos (loisel.) l.b.sm. (bromeliaceae) |
publisher |
Sociedade Botânica do Brasil |
series |
Acta Botânica Brasílica |
issn |
1677-941X |
publishDate |
2015-03-01 |
description |
This paper presents a comparative description of the starch distribution in the anthers, microspores and pollen grains of Aechmea recurvata, Dyckia racinae and Tillandsia aeranthos. Flowers at different stages of development were processed according to plant microtechniques for observation by light microscope. Ten stages of embryological development were used as references for the comparative analysis of starch distribution and dynamics. The structural data showed a greater starch accumulation in the parietal layers and connective of D. racinae. It was observed that in the species studied, starch began to accumulate in microspore mother cell stage. The pollen grains in D. racinae and in T. aeranthos present two amylogenesis-amylolysis cycles, while A. recurvata presents only one. One amylogenesis-amylolysis cycle occurs in the parietal layers and/or connective tissue in all three species. The pollen grains in the three species are dispersed without starch and are characterized as the starchless type. Starch dynamics presents a close relation to the development of sporangia, microspores and pollen grains. It is believed that differences in the starch distribution and accumulation are related to the abiotic factors where the species are found. |
topic |
carbohydrates development microgametogenesis microsporogenesis sporangium |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000100103&lng=en&tlng=en |
work_keys_str_mv |
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