Microsporogenesis, Megasporogensis and Male and Female Gametophyte Development in Feijoa sellowiana (Myrtaceae)
نویسندگان
چکیده
منابع مشابه
Male and female gametophyte development in Achillea tenuifolia (Asteraceae)
The anther, pollen and ovule development in Achillea tenuifolia were studied with a bright field microscopy. Results showed that the anther is of tetrasporangiate type and the anther wall is composed by four layers: an epidermis, an endothecium, one middle layer and a tapetum layer. Tapetum is of secretory type and its cells showed polyploidy. Pollen tetrads were tetrahedral, microspores were v...
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چکیده هدف اصلی تحقیق حاضر مطالعه و بررسی رابطه بین خودکارامدی شنیداری با درک شنیداری بود.همچنین رابطه درک شنیداری وخودکارآمدی شنیداری با جنسیت و رابطه خودکارامدی شنیداری با سن نیز مورد بررسی قرار گرفت.تعداد شصت زبان اموز-سی دختر و سی پسر- کانون زبان ایران در مرکز خرم آباد به صورت تصادفی انتخاب شدند. روشهای به کار رفته در جمع اوری داده ها عبارت بودند ازبرسشنامه خودکارآمدی و تست درک شنیداری لانگ...
15 صفحه اولMale Gametophyte Development and Function
Male gametophyte development in higher plants is a complex process that requires the coordinated participation of various cell and tissue types and their associated specific gene expression patterns. The male gametophytic life cycle can be divided into a developmental phase leading to the formation of mature pollen grains, and a functional or progamic phase, beginning with the impact of the gra...
متن کاملIdenti®cation of Feijoa sellowiana Berg accessions by RAPD markers
Random ampli®ed polymorphic DNAs (RAPDs) were used to discriminate among 25 Feijoa sellowiana cultivars and accessions. Fifty ten-mer oligonucleotide primers were tested on ®ve accessions. Twenty-two primers, showing clear polymorphic patterns, were chosen to amplify the DNAs of all 25 genotypes; each ampli®cation was repeated three times separately. Only 11 primers were ®nally analysed, yieldi...
متن کاملDetermination of promising native Feijoa (Feijoa sellowiana Berg.) genotypes from Sakarya Region in Turkey
This study was conducted to determine Feijoa genotypes grown within seedling population in Sakarya region. In the study, approximately 300 Feijoa plants were surveyed. In these plants, 28 genotypes were labelled and evaluated. Phenological and pomological researches on these genotypes were made for two years. As a result of this study, 16 Feijoa genotypes were selected according to the weighted...
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ژورنال
عنوان ژورنال: International Journal of Agriculture and Biology
سال: 2016
ISSN: 1560-8530,1814-9596
DOI: 10.17957/ijab/15.0140