hyssop (hyssopus officinalis l.), belongs to the family of lamiaceae which its origin is asia minor, and is considered as one of the most important medicinal plant. this experiment was done to study the effects of population and bap concentrations on hyssop plant regeneration under in vitro culture conditions. this research were performed in factorial experiment with three populations (hamadan,...

Transgenic plants harboring the left transfer DNA (T(L)-DNA) of the root inducing plasmid of Agrobacterium rhizogenes show many developmental abnormalities. We observed frequent appearance of normal looking lateral (revertant) shoots from such aberrant plants. Unlike aberrant shoots of the plant, revertant shoots exhibited a very high growth rate and set viable seeds. Sexual and vegetative repr...

Callitriche cophocarpa Sendtner is a heterophyllous amphibious macrophyte that produces apical rosettes of floating leaves. The importance of air contact for inorganic carbon and N uptake and for growth was investigated. Plants were grown with the floating rosette in contact with air of various humidities (10, 50, and >90% relative humidity) and with the submerged parts in N-free water at 350 [...

Shoots and roots are autotrophic and heterotrophic organs of plants with different physiological functions. Do they have different metabolomes? Do their metabolisms respond differently to environmental changes such as drought? We used metabolomics and elemental analyses to answer these questions. First, we show that shoots and roots have different metabolomes and nutrient and elemental stoichio...

Tissue culture techniques can be beneficial for quick clonal propagation and production of disease-free plants of purple passion fruit as one of the most important medicinal and ornamental plants. These techniques are essential tools for the production of transgenic plants and high-value phytochemicals. The present study was planned to introduce an efficient in vitro propagation for pu...

2Botany Department, San Diego State University, San Diego, California 92182 Abstract: Purpose of this study was to determine the balance between root and shoot growth in chaparral shrubs. Under controlled conditions with ample water and nutrient supplies, growth of roots and shoots continued exponentially for 5 months. In contrast, in the field shoots had flushing periods in the spring, lasting...

lisiantus is introduced among the 10 top cutting flowers in the world. micropropagation can be used in this plant because of some problems in traditional propagation. in this research, the effects of the growth regulators on the in vitro shoot regeneration and rooting of the shoots obtained from nodal explants were investigated. the effects of the different concentrations of bap and kin on shoo...

There are evidences showing that adverse impacts of aluminum (Al) on plants growth and development are associated with its effect on plasma membrane and cell wall. Influence of Al on peroxidation of membrane lipids, wall-bound phenolics, lignin, soluble phenolics and the activity of certain enzymes involved in metabolism of phenols, i.e., phenylalanine ammonia lyase (PAL) and polyphenol oxidase...