this research was aimed to investgate the effect of light quality on micropropagation of pear rootstock oh×f333. first, single nodes explants were cultured in modified ql medium containing ba at four levels (0, 0.5, 1, and 2 mg/l-1) and iaa at three levels (0, 0.1, and 1 mg/l-1) and were evaluated for shoot proliferation. then, plantlets subcultured in modified ql medium containing 1 mg/l-1 ba ...

The present study is the first to examine the effect of high-altitude acclimatization and reexposure on the responses of cerebral blood flow and ventilation to CO2. We also compared the steady-state estimates of these parameters during acclimatization with the modified rebreathing method. We assessed changes in steady-state responses of middle cerebral artery velocity (MCAv), cerebrovascular co...

Light-emitting diodes (LEDs) are currently being used as a light source for in vitro regeneration or the growth of plants controlled environment. However, it is crucial to define target system’s sensitivity quality before LEDs may be employed exclusive light. The objective present work was investigate influence red (R), blue (B), white (W), and combination plus (1:1) red, blue, green (1:1:1) on...

Progress and problems in vegetative propagation of important North American hardwoods are reviewed with emphasis on rooting cuttings and the application of propagatIOn t~'hniqucs in breeding research. Some problems in rooting physiology are diS('u,;",>.

Rooting phylogenies is critical for understanding evolution, yet the importance, intricacies and difficulties of rooting are often overlooked. For rooting, polymorphic characters among the group of interest (ingroup) must be compared to those of a relative (outgroup) that diverged before the last common ancestor (LCA) of the ingroup. Problems arise if an outgroup does not exist, is unknown, or ...

Parthenocissus plant is one of the most attractive outdoor deciduous vines; provides deep green cover to most any object, rapidly climbing by means of tendrils and adhesive disks, can be espaliered against a wall and provides great visual appeal during winter when the leaves have fallen. Rooting the cutting of this plant is difficult without using a rooting hormone, so the present research proj...

Peppers (Capsicum spp.) are recalcitrant to in vitro culture regeneration, making the application of vitro-based breeding strategies difficult. We evaluated impact different combinations auxins, cytokinins and micronutrients on induction direct organogenesis cotyledon hypocotyl explants C. annuum, baccatum chinense. found variation regeneration response among species type explant. In this way, ...

BACKGROUND The physiological challenges posed by hypobaric hypoxia warrant exploration of pharmacological entities to improve acclimatization to hypoxia. The present study investigates the preclinical efficacy of sphingosine-1-phosphate (S1P) to improve acclimatization to simulated hypobaric hypoxia. EXPERIMENTAL APPROACH Efficacy of intravenously administered S1P in improving haematological ...