agrobacterium rhizogenes (pri), a causative agent of hairy root disease, effectively induces hairy root formation in a variety of plant species. in our study four bacterial strains ar15834, a4, 9435 and c318 and three explants types leaf, stems and roots, were examined. hairy roots were induced from roots, stems and leaf explants. the highest transformation efficiency of 77% was achieved by usi...

four separate experiments were conducted to study the effects of factors controlling the establishment of explants from two walnut genotypes z60 and z63 (damavand). factors were explant type, sampling time, explant orientation on the growth medium and antioxidants type. the explants were collected from the collection garden of tooyserkan walnuts research station. four explant types (apical meri...

the present investigation was conducted to study the effects of type and concentration of auxin and cytokinin on callus induction of three strawberry (kurdistan, parose and camarosa) cultivars. for this purpose, leaf blade, nodal, petiole, receptacle, stamen and flower bud explants were cultured on murashige and skoog (ms) medium at three separate experiments included 2, 4 dichlorophenoxyacetic...

Endothelin (ET) peptides stimulate AVP secretion via ETB receptors at hypothalamic loci. Nitric oxide modulates the actions of ET in the cardiovascular system and also influences neurotransmission and specifically suppresses firing of magnocellular neurons. The purpose of these studies was to ascertain whether nitric oxide, generated in response to ETB receptor stimulation, buffers the stimulat...

An efficient protocol for callus induction and somatic embryogenesis of Cyclamen premium Mill. Was developed. In this study we investigate difference between response of two explants type leaf and petiole and two medium salt concentrations MS and 1⁄2 MS on callus percentage and somatic embryo number. Media was non-significant on callus production but leaf explants was better than petiole and in...

Regeneration of explants plays a significant role in plant transformation. Explant type, hormonal concentration, and pre-culturing period are important in transformation efficiency. To get an efficient transformation of canola and optimize regeneration conditions, different explants along with different culture media were studied. Four canola varieties were used to evaluate regeneration ability...

Rumex thyrsiflorus Fingerh. is one of the few dioecious plant species, which have sex chromosomes. We conducted the preliminary experiments to determine the type of morphogenesis of R. thyrsiflorus explants cultured in vitro and to verify, using PCR-based methods, if there is the relationship between sex and morphogenetic response of explants micropropagated under in vitro conditions. The resul...

Rossi, Noreen F., and William H. Beierwaltes. Nitric oxide modulation of ETB receptor-induced vasopressin release by rat and mouse hypothalamo-neurohypophyseal explants. Am J Physiol Regul Integr Comp Physiol 290: R1208–R1215, 2006. First published December 15, 2005; doi:10.1152/ajpregu.00701.2005.—Endothelin (ET) peptides stimulate vasopressin (AVP) secretion via ETB receptors at hypothalamic ...

Endothelin (ET) peptides stimulate vasopressin (AVP) secretion via ET(B) receptors at hypothalamic loci. Nitric oxide modulates the actions of ET in the cardiovascular system and also influences neurotransmission and specifically suppresses firing of magnocellular neurons. The purpose of these studies was to ascertain whether nitric oxide, generated in response to ET(B) receptor stimulation, bu...