Título:	Evidence of programmed cell death during microsporogenesis in an interspecific Brachiaria (Poaceae: Panicoideae: Paniceae) hybrid.
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.
Ano de publicação:	2007
Referência:	Genetics and Molecular Research, Ribeirão Preto, v. 6, n. 2, p. 308-315, 2007.
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.
Thesagro:	Melhoramento genético vegetal Citogenética vegetal Planta Forrageira Gramínea forrageira Hibrido Meiose
NAL Thesaurus:	Cytogenetics Plant breeding Hybrids Meiosis Brazil
Palavras-chave:	Braquiária PCD Campo Grande Mato Grosso do Sul Brasil Feed crops Feed grasses
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPGC)