Ultrastructural features of embryogenic pollen in Datura innoxia are described, just prior to, during, and after completion of the first division of the presumptive vegetative cell. In anther cultures initiated towards the end of the microspore phase and incubated at 28 degrees C in darkness, the spores divide within 24 h and show features consistent with those of dividing spores in vivo. Cytok...

The generative cell wall in the pollen grain of Endymion non-scriptus is formed, as in somatic cells, from a cell plate between the vegetative and generative nuclei. This wall curves around the generative nucleus, and fuses with the intine to enclose the generative cell. The generative cell is subsequently freed from the intine by the constriction of the generative cell wall between the generat...

Continued DNA synthesis in the generative cell nucleus, followed by mitosis and cytokinesis, results in the formation of pollen embryoids in cultured anthers of H. niger. In contrast, the nucleus of the vegetative cell undergoes no DNA synthesis after it is cut off, or synthesizes DNA only during a limited number of cell cycles. DNA synthetic patterns in the generative and vegetative cell nucle...

in order to study the effect of compost and salinity stress on seedling growth and generative traits of wheat (sivand cultivar) a pot experiment was conducted based on complete randomized design arranged in factorial with six replications at the research greenhouse, faculty of agriculture, mashhad branch, islamic azad university, mashhad, iran, during in cropping season 2013-2014. factors were ...

Anti-insect photoselective nets present a new technology that combines light manipulation and pest protection in orchards. In this study, the effect of anti-insect red net on generative vegetative traits was studied an apple orchard near city Zadar, Croatia. 'Granny Smith' apples were grown M9 rootstock raised as slender spindles. The experiment consisted two treatments: trees covered with (AGR...

Redox activity was measured in vegetative and generative apical parts (5 mm of the stem) and youngest leaves of winter (cv. "G6rczański") and spring (cv. "Młochowski") rape. Both genotypes were cultured under the same growth conditions (17/15 degrees C day/night, 16 h photo-period), but winter rape was additionally vernalized (5/2 degrees C day/night, 56 days) in order to induce the generative ...

Origanum onites and Origanum vulgare ssp. hirtum were collected from Balikesir, on the north west of Turkey. The nitrogen contents in organs such as root, stem, leaf and flower of Origanum onites and Origanum vulgare ssp. hirtum taxa in vegetative and generative growth stages were investigated. Nitrogen analyses of soil and plant samples were carried out according to the Kjeldahl method. It was...

In the last five decades, use of rootstocks and scions has changed, along with their systems cultivation. Associated climate change, fruit trees face new ecological phytopathological challenges. Rootstocks affect generative vegetative performance a scion, such as productivity, span nonbearing period, growth vigor, shelf-life quality fruits. According to recent study, they also frost tolerance f...