Leaf senescence in field-grown soybean (Merrill) as defined by the period after full expansion, was studied by measuring abscisic acid (ABA), total soluble protein, and chlorophyll in leaves through the later part of the growing season. ABA concentrations increased significantly at the end of the season when leaves had started to turn yellow, well after total soluble protein and chlorophyll had...

Goal. To establish the influence of quantitative biometric parameters black nut fruit on dormancy its seeds. Methods. The results research were processed according to generally accepted methods in agriculture, plant growing, statistics. Field — collect fruits, measuring weight determine parameters, spectrometric, mathematical-statistical carry out analysis variance and statistical processing as...

We previously reported that an apparent water potential disequilibrium is maintained late in muskmelon (Cucumis melo L.) seed development between the embryo and the surrounding fruit tissue (mesocarp). To further investigate the basis of this phenomenon, the permeability characteristics of the tissues surrounding muskmelon embryos (the mucilaginous endocarp, the testa, a 2- to 4-cell-layered pe...

Autumnal tints are one of the most fascinating natural phenomena, but the molecular mechanism of chlorophyll (Chl-)degradation in deciduous trees has not been fully understood. In this study, from the leaves of Ginkgo biloba, chlorophyllase-homologous GbCLH was cloned by RT-PCR with degenerated primers. The expression of GbCLH in different yellowing stages was analyzed by Northern hybridization...

Considering that cultivars of peach rootstocks selected to be propagated by seeds show variation in the degree physiological dormancy and peculiarities regarding limitation imposed endocarp, it is essential define cold stratification period ideal temperature used during pre-germination treatment. Isolated for each cultivar, knowledge these variables which will provide viability production via s...

The terms senescence and programmed cell death (PCD) have led to some confusion. Senescence as visibly observed in, for example, leaf yellowing and petal wilting, has often been taken to be synonymous with the programmed death of the constituent cells. PCD also obviously refers to cells, which show a programme leading to their death. Some scientists noted that leaf yellowing, if it has not gone...

Propagation of hawthorns (Crataegusspp.) is difficult, and vegetative methods are not responsive in a sufficient manner. So, seed propagation prevalently used to propagate hawthorns. However, hard endocarp embryo dormancy restrict the germination To overcome these restrictions, many treatments have been tested researches. Some them were magnificent others ineffective. It has resolved that warm ...