Aberrant microsporogenesis in Impatiens L. (Balsaminaceae) and its bearing on the taxonomy of the genus.

Pollen ontogeny linked to tapetal cell maturation inImpatiens parviflora(Balsaminaceae)

“…With respect to palynological research in the family Balsaminaceae or the balsaminoid clade (sensu Anderberg et al, 2002;Bremer et al, 2002), former studies have mainly focussed on aberrant microsporogenesis in cultivated Impatiens species (Tara & Namboodiri, 1976;Zinov'eva-Stahevitch & Grant, 1985) or on pollen morphological diversity within Balsaminaceae (Huynh, 1968a(Huynh, , 1968bBhaskar & Razi, 1973;Grey-Wilson, 1980;Lu, 1991;Janssens et al, 2005) or within other families of the balsaminoid clade (Erdtman, 1952;Barth, 1963;Wijmstra, 1968;Punt, 1971;Maguire et al, 1972;Graham, 1977;Alvaredo & Palacios-Chavez, 1987;Roubik & Moreno, 1991;Da Silva Correa & Esteves, 1997;Colinvaux et al, 1999;Lens et al, 2005;Janssens et al, 2005). …”

“…In Balsaminaceae, only scarce information is available on pollen development. Former studies mainly focussed on aberrant microsporogenesis in Impatiens species (Tara & Namboodiri, 1976;Zinov'eva-Stahevitch & Grant, 1985). In cultivated Impatiens species, like I. walleriana Hook.…”

“…In cultivated Impatiens species, like I. walleriana Hook. f., meiotic aberrations are reported to occur during microsporogenesis, including precocious separation of the chromosomes and irregular divisions of the pollen nucleus, leading to sterile or semi-sterile plants (Zinov'eva-Stahevitch & Grant, 1985). Since no meiotic aberrations are recorded in the literature for I. parviflora DC., we have chosen to study microsporogenesis in a wild population of this species.…”