Embryogenesis of angiosperms: ultrastructural transformations of plastids
نویسندگان
چکیده
منابع مشابه
Embryogenesis in Angiosperms: Development of the Suspensor.
The zygote in flowering plants usually divides transversely to form a terminal cell, which gives rise to the embryo proper, and a vacuolated basal cell, which often divides rapidly to form a structure known as the suspensor. Angiosperm suspensors vary widely in size and morphology from a single cell to a massive column of several hundred cells (Maheshwari, 1950; Wardlaw, 1955; Lersten, 1983). I...
متن کاملIndispensable Roles of Plastids in Arabidopsis thaliana Embryogenesis
The plastid is an organelle vital to all photosynthetic and some non-photosynthetic eukaryotes. In the model plant Arabidopsis thaliana, a number of nuclear genes encoding plastid proteins have been found to be necessary for embryo development. However, the exact roles of plastids in this process remain largely unknown. Here we use publicly available datasets to obtain insights into the relevan...
متن کاملUltrastructural organization of two tapetal types in angiosperms.
The development of preparation techniques that include freeze fracturing provide an ideal method for studying the differentiation of plant tissues in the scanning electron microscope. This is illustrated with reference to tapetal development in Catananche caerulea, which has a plasmodial tapetum, and in Lolium perenne, which has a secretory tapetum.
متن کاملLipid Transformations in Plastids of Bean Leaves and Pepper Fruits.
A few reports have appeared concerning the synthesis of plastid lipids. Stumpf and James (17) and Stumpf et al. (18) found that both saturated and unsaturated fatty acids may be formed from acetate by chloroplast preparations. However, in some bluegreen algae, Bloch et al. (4) found that long-chain monounsaturates are synthesized by oxidative desaturation of corresponding saturates. Kates (9) s...
متن کاملThe expression and roles of parent-of-origin genes in early embryogenesis of angiosperms
Uniparental transcripts during embryogenesis may arise due to gamete delivery during fertilization or genomic imprinting. Such transcripts have been found in a number of plant species and appear critical for the early development of embryo or endosperm in seeds. Although the regulatory expression mechanism and function of these genes in embryogenesis require further elucidation, recent studies ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Societatis Botanicorum Poloniae
سال: 2014
ISSN: 2083-9480
DOI: 10.5586/asbp.1981.049