| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Chromosome stickiness during meiotic behavior analysis of Passiflora serrato-digitata L. (PassifloraCEAE)
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| Autores: |
Kiihl,Paulo Roberto Peres
Pereira,Andréia Rodrigues Alonso
Godoy,Sara Mataroli de
Stenzel,Neusa Maria Colauto
Risso-Pascotto,Claudicéia
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| Data: |
2011-06-01
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| Ano: |
2011
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| Palavras-chave: |
Microsporogenesis
Meiosis
2n gametes
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| Resumo: |
Almost 90% of species of the genus Passiflora are native to the American continent, with high commercial value due to the fact that some species are used for human food while others have ornamental and medical qualities. Passiflora serrato-digitata is one of the species that integrates the Paraná Agronomic Institute germoplasm bank at its experimental base in Londrina, PR, Brazil. Collected flower buds were fixed in ethanol/acetic acid (3:1 v/v) for 24h, transferred to 70% alcohol and stored under refrigeration. Slides were prepared by the squashing technique and stained with 1.0% propionic carmine; they were analyzed under an optic microscope. Irregularities in the chromosome segregation process of P. serrato-digitata have been verified by meiotic behavior analysis. These comprised precocious migration to poles in metaphase I and II, non-oriented chromosomes in metaphase plate in metaphase I and II, laggard chromosomes in anaphase I and II towards the formation of micronucleus in telophase I and II, and microspores in tetrads. Chromosome stickiness was another irregularity reported in the Passiflora genus for the first time. These irregularities which also contributed to the formation of monads, dyads and triads, resulted in normal imbalanced 2n and 4n microspores. According to the observed Meiotic Index of 71.83%, this species is not meiotically stable.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000600016
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/S0103-84782011005000076
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.41 n.6 2011
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| Direitos: |
info:eu-repo/semantics/openAccess
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