نتایج جستجو برای: number of shoots
تعداد نتایج: 21178113 فیلتر نتایج به سال:
Background: Rosa centifoliais commercially propagated by asexual means but in vitro propagation ensure the production of disease free and healthy plants and browning of explants creates hurdle in their multiplication. Objectives: The aim was to reduce oxidative browning of shoots of R. centifolia in MS medium during in vitro propagation. Materials and Methods: Axillary buds of R. centifolia we...
Stem length and leaf area of current-year shoots were measured in saplings of eight broad-leaved evergreen tree species growing under a forest canopy. Stem length varied over a range of one to two orders of magnitude within each species. In all species, both the number of leaves and the mean stem length between successive leaves were greater in longer shoots. Mean leaf size and stem length were...
Background & Aim: Effects of ultra violet spectrum on plants due to their obligatory requirement for sunlight for survival are unavoidable. Direct effects of UV on plant growth and development are generally negative and usually they use many different defense mechanisms to acclimate and protect themselves. Material & Methods: The present research for the first time was conducted to investigate...
with the introduction of communicative language teaching, a large number of studies have concerned with students’ oral participation in language classrooms. although the importance of classroom participation is evident, some language learners are unwilling to engage in oral activities. this passivity and unwillingness to participate in language classroom discussions is known as “reticence”. rev...
An in vitro plant regeneration protocol was successfully established in Aphyllorchis Montana , a saprophytic achlorophyllous orchid by culturing immature seeds. Among the six basal media evaluated for seed germination, BM-TM medium was found to be the best followed by KC medium. After 40 days, all the media turned brown and the growths of the protocorms were arrested. Activated charcoal, 1 g/l ...
common yew (taxus baccata) is one of the native and extinguishing speices at northern forests of iran that is very important as a genetic reserve and, therefore, more studies are necessary for preservation and restoration of this rare forest speices. for having high value and complete preservation of gene structure, vegetative propagation is one of the suitable in use methods in this field. thi...
in fact, this study focused on the following questions: 1. is there any difference between the effect of functional/notional approach and the structural approaches to language teaching on the proficiency test of efl learners? 2. can a rather innovative language test referred to as "functional test" ge devised so so to measure the proficiency test of efl learners, and thus be as much reliable an...
a reliable method is described for rapid proliferation of axillary shoots from nodal segment of mature field-grown aromatic and medicinal plant vitex negundo through in vitro culture. of different concentrations of n6-benzyladenine (ba) evaluated as supplements to murahige and skoog (ms) medium, ba at 1mg/l was effective in enhancing bud break and shoot regeneration. response of explants was al...
interactive effect of plant growth regulators6-benzylaminopurine (bap) (0, 2, 4 and 8 µm) and1-naphtalene acetic acid (naa) (0, 0.05, 0.25 and 0.5µm) in van der salm (vs) medium was used to optimize in vitro propagation of rosa hybrida cv. iceberg.shoot proliferation and number of new leaves weremeasured as growth indicators. as the concentrationof bap was raised, growth rate increased with all...
Dendrocalamus hamiltonii, a large, clump-forming bamboo, has great potential to contribute towards poverty alleviation efforts across its distributional range. Harvesting methods that maximize yield while they fulfill local objectives and ensure sustainability are a research priority. Documenting local ecological knowledge on the species and identifying local users' goals for its production, we...
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