the response of anther and pollen development, pollen cellular material release and pollen proteins to air pollution in petunia hybrida juss. (solanaceae)

Pollen tube development in Petunia hybrida following compatible and incompatible intraspecific matings.

Pollen tubes formed following compatible and incompatible intraspecific matings in Petunia have been examined with light and electron microscopes. Compatible and incompatible tubes develop in an identical fashion on the stigma but, on entry into the top 1 mm of the stylar transmitting tissue changes occur both to the cytology of the tubes and their rates of growth. The early cytological changes...

The Coloration of Anther and Corbicular Pollen

Anther and pollen development in some species of Poaceae (Poales).

Anther and pollen development were studied in Olyra humilis Nees, Sucrea monophylla Soderstr, (Bambusoideae), Axonopus aureus P. Beauv., Paspalum polyphyllum Nees ex Trin. (Panicoideae), Eragrostis solida Nees, and Chloris elata Desv. (Chloridoideae). The objective of this study was to characterise, embryologically, these species of subfamilies which are considered basal, intermediate and deriv...

Anther and pollen development: A conserved developmental pathway

Pollen development is a critical step in plant development that is needed for successful breeding and seed formation. Manipulation of male fertility has proved a useful trait for hybrid breeding and increased crop yield. However, although there is a good understanding developing of the molecular mechanisms of anther and pollen anther development in model species, such as Arabidopsis and rice, l...

Effects of Previous Pollination and Stylar Ethylene on Pollen Tube Growth in Petunia hybrida Styles.

The effect of ethylene on the growth rate of pollen tubes in styles of Petunia hybrida was examined. Apart from its strong inhibition of pollination-induced ethylene synthesis, aminoethoxyvinylglycine, placed on the stigma, did not impede tube growth. The inhibitors of the action of ethylene, silver thiosulfate and 2,5-norbornadiene, were similarly ineffective. Application of the ethylene precu...

Pollen- and anther-specific chi promoters from petunia: tandem promoter regulation of the chiA gene.

We have analyzed the spatial and temporal activities of chalcone flavanone isomerase (chi) A and B gene promoters from petunia. To study the tandem promoter regulation of chiA, various chiA promoter fragments were fused with the beta-glucuronidase (GUS) reporter gene. Analysis of transgenic plants containing these chimeric genes provided definitive proof that the chiA coding region is regulated...