In micropropagation and in vitro conservation various nutrient media have been used for regeneration of citrus rootstocks. this respect, the present study was conducted to define, among three culture media, one common use (MS) two developed arboreal species (RMAN WPM), best formulation establishment, propagation vitro. Plantlets from 10 rootstocks grown were micropropagated conserved 18 months,...

David J. Bordua, Ph.D., Ann Arbor, Michigan, is Assistant Professor in the Department of Sociology at the University of Michigan. He received his doctorate from Harvard in 1957 and has published on theories of delinquency, authoritarianism, college aspirations of high school youth, and the use of formal selection instruments to detect delinquents at an early age. ABSTRACT: Group delinquency has...

Youth subcultures, characterized by a distinctive lifestyle, music preference, shared values and behaviors, are associated with substance use. The aim of this study was to explore whether protective factors such as parental monitoring, parental bonding and parental substance abstinence affect the association between subculture affiliation and adolescents' substance use. We used data from 15-yea...

Differentiation and morphogenetic potential of Allium commutatum Guss. callus tissue was investigated in five subcultures. Callus tissue was derived from root tips of in vitro grown seedlings and maintained on MS medium supplemented with 3% sucrose, 0.8% agar, 4.5 pM 2,4-D and 4.6 pM kinetin. Pieces of calli were subcultured on media with different concentrations and combinations of 2,4-D (1.0,...

The aim of the work was to study features clonal micropropagation essential oil rose interspecific hybrids obtained in embryo culture vitro. Analysis 12 crossing combinations demonstrated that frequency hybrid seedling formation varied from 0 71.4%. For vitro seedlings were divided into stem segments with a node and cultivated on MS medium supplemented 0.5 mg/l BAP 0.1 GA 3 . During multiplicat...