Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Anais da Academia Brasileira de Ciências (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000600806 |
Resumo: | Abstract we conducted anatomical analysis of anthers with the aim to establish the differences in the development pattern of microsporophytes and microgametophytes between perfect and imperfect flowers in the tribe Gardenieae (Rubiaceae). The species studied were: Tocoyena formosa (monoecious with perfect flowers), Cordiera concolor, Genipa americana, Randia calycina, and Randia heteromera (dioecious with imperfect flowers). Flowers in successive stages of development were collected and fixed. The material was processed and examined using light microscopy and scanning electron microscopy. The present study revealed the stage when pollen is arrested in the functionally pistillate flowers of the dioecious taxa. Based on these observations an evolutionary sequence of changes towards the reduction of non-functional anthers in Rubiaceae is proposed. In addition, we describe and discuss characters that might be of importance in future phylogenetic studies in Rubiaceae (e.g., pollen morphology and its dispersal unit, the presence of orbicules, and a new type of placentoid). |
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Anais da Academia Brasileira de Ciências (Online) |
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Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecyArrested developmentpermanent tetradsplacentoidRubiaceaesecondary pollen presentationAbstract we conducted anatomical analysis of anthers with the aim to establish the differences in the development pattern of microsporophytes and microgametophytes between perfect and imperfect flowers in the tribe Gardenieae (Rubiaceae). The species studied were: Tocoyena formosa (monoecious with perfect flowers), Cordiera concolor, Genipa americana, Randia calycina, and Randia heteromera (dioecious with imperfect flowers). Flowers in successive stages of development were collected and fixed. The material was processed and examined using light microscopy and scanning electron microscopy. The present study revealed the stage when pollen is arrested in the functionally pistillate flowers of the dioecious taxa. Based on these observations an evolutionary sequence of changes towards the reduction of non-functional anthers in Rubiaceae is proposed. In addition, we describe and discuss characters that might be of importance in future phylogenetic studies in Rubiaceae (e.g., pollen morphology and its dispersal unit, the presence of orbicules, and a new type of placentoid).Academia Brasileira de Ciências2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000600806Anais da Academia Brasileira de Ciências v.94 n.4 2022reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-3765202220191362info:eu-repo/semantics/openAccessJUDKEVICH,MARINA D.SALAS,ROBERTO M.GONZALEZ,ANA M.eng2022-11-22T00:00:00Zoai:scielo:S0001-37652022000600806Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2022-11-22T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false |
dc.title.none.fl_str_mv |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
title |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
spellingShingle |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy JUDKEVICH,MARINA D. Arrested development permanent tetrads placentoid Rubiaceae secondary pollen presentation |
title_short |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
title_full |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
title_fullStr |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
title_full_unstemmed |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
title_sort |
Anther structure and pollen development in species of Rubiaceae and anatomical evidence of pathway to morphological dioecy |
author |
JUDKEVICH,MARINA D. |
author_facet |
JUDKEVICH,MARINA D. SALAS,ROBERTO M. GONZALEZ,ANA M. |
author_role |
author |
author2 |
SALAS,ROBERTO M. GONZALEZ,ANA M. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
JUDKEVICH,MARINA D. SALAS,ROBERTO M. GONZALEZ,ANA M. |
dc.subject.por.fl_str_mv |
Arrested development permanent tetrads placentoid Rubiaceae secondary pollen presentation |
topic |
Arrested development permanent tetrads placentoid Rubiaceae secondary pollen presentation |
description |
Abstract we conducted anatomical analysis of anthers with the aim to establish the differences in the development pattern of microsporophytes and microgametophytes between perfect and imperfect flowers in the tribe Gardenieae (Rubiaceae). The species studied were: Tocoyena formosa (monoecious with perfect flowers), Cordiera concolor, Genipa americana, Randia calycina, and Randia heteromera (dioecious with imperfect flowers). Flowers in successive stages of development were collected and fixed. The material was processed and examined using light microscopy and scanning electron microscopy. The present study revealed the stage when pollen is arrested in the functionally pistillate flowers of the dioecious taxa. Based on these observations an evolutionary sequence of changes towards the reduction of non-functional anthers in Rubiaceae is proposed. In addition, we describe and discuss characters that might be of importance in future phylogenetic studies in Rubiaceae (e.g., pollen morphology and its dispersal unit, the presence of orbicules, and a new type of placentoid). |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000600806 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000600806 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0001-3765202220191362 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
Anais da Academia Brasileira de Ciências v.94 n.4 2022 reponame:Anais da Academia Brasileira de Ciências (Online) instname:Academia Brasileira de Ciências (ABC) instacron:ABC |
instname_str |
Academia Brasileira de Ciências (ABC) |
instacron_str |
ABC |
institution |
ABC |
reponame_str |
Anais da Academia Brasileira de Ciências (Online) |
collection |
Anais da Academia Brasileira de Ciências (Online) |
repository.name.fl_str_mv |
Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC) |
repository.mail.fl_str_mv |
||aabc@abc.org.br |
_version_ |
1754302872487460864 |