نتایج جستجو برای: a single reciprocal crossed clone p euphratica x alba and 2 other p alba clones were planted
تعداد نتایج: 20903995 فیلتر نتایج به سال:
The commercial potato is an autotetraploid species. Certain allotetraploid species such as S. acaule despite theire identical ploidy level are not crossable with commercial potato due to their different endosperm balance numbers. The aim of this experiment was to investigate the possibility of germplasm transferring from allotetraploid species to cultivated potato by the use of diploid species ...
Carbon sequestration into plants biomass, especially in fast growing trees is an easier and economically way for dropping off CO2 from atmosphere. This study was carried out in order to investigate above-ground biomass of white poplar (populous alba, L.) plantations that was planted in fourdifferent plant spacing (0.5 × 0.5, 1×1, 2×2 and 4×4 m.) in Chaharmahal and Bakhtiari province in west of ...
این پژوهش به منظور بررسی امکان دورگگیری بین جنسی در خانواده بید از طریق بکارگیری روشهای نوین بیوتکنولوژی انجام گرفت. بدین منظور تلاقی بین دو جنس صنوبر و بید با استفاده از گونههایsalix alba و populus caspica بر روی تخمدانهای ایزوله از گردههای بیگانه انجام گرفت. تکنیک نجات جنین (کشت تخمدان)، جهت جوانهزنی رویانها بکار گرفته شد و تخمدانها به محیط کشت ms جامد در فواصل 10، 14 و 21 روز انتق...
Stress response capacity (Fv/Fm at 690 nm and F690/F735 at Fmax) of untransformed hybrid poplar, Populus x canescens (P tremula x P alba), and two transgenic lines overexpressing gamma-ECS (gamma-glutamylcysteine synthetase) either in the cytosol (cyt-ECS) or in the chloroplast (chl-ECS) was studied in response to the herbicide paraquat (4.0 x 10(-9) to 4.0 x 10(-6) M) for 21 days. Significant ...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
1 Bach JR. Alba AS, Bohatiuk G, Saporito L, Lee M. Mouth intermittent positive pressure ventilation in the management of post-polio respiratory insufficiency. Chest 1987; 91:859-64 2 Bach JR. O’Brien J, Krotenberg R, Alba A. Management of end stage respiratory failure in Duchenne muscular dystrophy. Muscle Nerve 1987; 10:177-82 3 Bach JR. Alba AS, Mosher R, Delaubier A. Intermittent positive pr...
the main purpose of the present study was to investigate the relationship between listening proficiency and metacognitive listening strategies awareness among low, mid, and highly self-regulated students. three hundred and seventy one efl students participated in this study (all grade 3 and 4 high-school students who were studying in khansar in academic year 1391-92). to gather the data, three ...
increasing of wood demand is currently one of the most important problems in our society. different clones of populus nigra from salicacea as a native fast-growing species have a good potential for planting in wide scale. but because of the ecological differences in the field, especially. temperature alterations, segregation of the cold resistant clones in relation to in seedling stage establis...
Genetic modifications of trees may provide many benefits, e.g. increase production, and mitigate climate change and herbivore impacts on forests. However, genetic modifications sometimes result in unintended effects on innate traits involved in plant-herbivore interactions. The importance of intentional changes in plant defence relative to unintentional changes and the natural variation among c...
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
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