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Start Over Author "Galati BG" Journal new zealand journal of botany
3 results on '"Galati BG"'

2. Comparative study of anther development, microsporogenesis and microgametogenesis in species of Corchorus , Heliocarpus , Luehea and Triumfetta Malvaceae: Grewioideae) from South America.

Author

Lattar, E, Galati, BG, and Ferrucci, MS

Subjects
*COMPARATIVE studies, *GAMETOGENESIS, *PLANT species, *POLLEN, *CELL differentiation, *PLANTS
Abstract

Anther development, microsporogenesis and microgametogenesis of six species of the generaCorchorus, Heliocarpus,LueheaandTriumfettawere analysed. The genera were found to share the following characters: ontogeny of anther wall of basic type; simultaneous microsporogenesis, resulting mainly in tetrahedral tetrads; secretory tapetum and pollen grains shed at the bicellular stage. Moreover, the characters that differentiate them are: presence of uninucleate tapetal cells inHeliocarpusandTriumfetta; binucleate cells inCorchorusand multinucleate cells inLuehea; differentiation of the thickenings of the endothecium at free microspores stage inCorchorus,HeliocarpusandTriumfetta, whereas inLueheadifferentiation occurs at the mature pollen grains stage; late disintegration of sporogenous tissue cell walls inLuehea; and the presence of orbicules, absent only inCorchorus. This is the first embryological report of the Grewioideae subfamily, contributing to the characterization of the genera studied. The results are discussed in relation to the known data for the family. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
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3. Comparative study of anther development, microsporogenesis and microgametogenesis in species of Corchorus, Heliocarpus, Lueheaand TriumfettaMalvaceae: Grewioideae) from South America

Author

Lattar, E, Galati, BG, and Ferrucci, MS

Abstract

Anther development, microsporogenesis and microgametogenesis of six species of the genera Corchorus, Heliocarpus, Lueheaand Triumfettawere analysed. The genera were found to share the following characters: ontogeny of anther wall of basic type; simultaneous microsporogenesis, resulting mainly in tetrahedral tetrads; secretory tapetum and pollen grains shed at the bicellular stage. Moreover, the characters that differentiate them are: presence of uninucleate tapetal cells in Heliocarpusand Triumfetta; binucleate cells in Corchorusand multinucleate cells in Luehea; differentiation of the thickenings of the endothecium at free microspores stage in Corchorus, Heliocarpusand Triumfetta, whereas in Lueheadifferentiation occurs at the mature pollen grains stage; late disintegration of sporogenous tissue cell walls in Luehea; and the presence of orbicules, absent only in Corchorus. This is the first embryological report of the Grewioideae subfamily, contributing to the characterization of the genera studied. The results are discussed in relation to the known data for the family.

Published
2014
Full Text
View/download PDF

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