Data/hora: 17/06/2024 03:23:54

Biblioteca(s): | Embrapa Gado de Corte.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Internacional - A
Data corrente: | 17/03/2008
Data da última atualização: | 29/01/2018
Autoria: | FUZINATTO, V. A.; PAGLIARINI, M. S.; VALLE, C. B. do.
Afiliação: | Veridiana Aparecida Fuzinatto, UEM; Maria Suely Pagliarini, UEM; CACILDA BORGES DO VALLE, CNPGC.
Título: | Evidence of programmed cell death during microsporogenesis in an interspecific Brachiaria (Poaceae: Panicoideae: Paniceae) hybrid.
Ano de publicação: | 2007
Fonte/Imprenta: | Genetics and Molecular Research, Ribeirão Preto, v. 6, n. 2, p. 308-315, 2007.
Idioma: | Inglês
Conteúdo: | Morphological changes have been investigated during plant programmed cell death (PCD) in the last few years due to the new interest in a possible apoptotic-like phenomenon existing in plants. Although PCD has been reported in several tissues and specialized cells in plants, there have been few reports of its occurrence during microsporogenesis. The present study reports a typical process of PCD during meiosis in an interspecific Brachiaria hybrid leading to male sterility. In this hybrid, some inflorescences initiated meiosis but it was arrested in zygotene/pachytene. From this stage, meiocytes underwent a severe alteration in shape showing substantial membrane blebbing; the cytoplasm became denser at the periphery; the cell nucleus entered a progressive stage of chromatin disintegration, and then the nucleolus disintegrated, and the cytoplasm condensed and shrunk. The oldest flowers of the raceme showed only the callose wall in the anthers showing obvious signs of complete sterility.
Palavras-Chave: | Braquiária; Brasil; Campo Grande; Feed crops; Feed grasses; Mato Grosso do Sul; PCD.
Thesagro: | Citogenética vegetal; Gramínea forrageira; Hibrido; Meiose; Melhoramento genético vegetal; Planta Forrageira.
Thesaurus Nal: | Brazil; Cytogenetics; Hybrids; Meiosis; Plant breeding.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/171766/1/Evidence-of-programmed-cell.pdf
Registro original: | Embrapa Gado de Corte (CNPGC)
Exemplares: | CNPGC - (11814-1) - UPC - AP - DD - 458/19 -  - SP 458/19 - DIS