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Anatomia vegetal aplicada ao estudo de sistemas androgênicos in vitro

2004; UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; Volume: 2; Issue: 3 Linguagem: Inglês

1679-2343

Lia Rosane Rodrigues, João Marcelo Santos de Oliveira, Jorge Ernesto de Araújo Mariath,

Soil Management and Crop Yield

Palavras-chave: anatomia vegetal, histologia, androgenese, embriogenese, embriologia. Abstract: (Applied Plant Anatomy to Study In Vitro Androgenic Systems) - By means of anther culture or isolated gametophyte culture, it is possible to control the microgametophytic develop- ment and to trigger atypical cell divisions that could originate sporophytes. These new sporophytes have the same genetic constitution of the gametophyte, with different ploidy levels, characterizing the occurrence of androgenesis. In this direct gametophyte-sporophyte transition, histological studies contribute to understanding morphogenic events, which frequently occur by embryo- genesis. Moreover, since anther walls and connective tissue could proliferate in vitro, cultured anthers must always undergo histological studies for a precise description of embryogenic sites. In this text, recent histological observations in both androgenic systems are presented and discus- sed. Observations confirm that compared with techniques, anatomical techniques enable highly reliable inferences.