Ultrastructure study of Vanda Kasem's Delight orchid's protocorm-like body
نویسندگان
چکیده
منابع مشابه
Physical wounding and ethylene stimulated embryogenic stem cell proliferation and plantlet regeneration in protocorm-like bodies of Phalaenopsis orchids.
Phalaenopsis orchids have been regenerated by inducing protocorm-like bodies (PLBs) from etiolated leaf sections. However, the physiological and molecular mechanisms of secondary PLB development and subsequent proliferation have not been explored. Bisectionally cutting primary PLBs resulted in more secondary PLBs at 5 weeks, suggesting an embryogenic stem cell property imposed by wounding of pr...
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The presented study established Agrobacterium-mediated genetic transformation using protocorm-like bodies (PLBs) for the production of transgenic Vanda Kasem's Delight Tom Boykin (VKD) orchid. Several parameters such as PLB size, immersion period, level of wounding, Agrobacterium density, cocultivation period, and concentration of acetosyringone were tested and quantified using gusA gene expres...
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Surgically excised human carotid bodies have been analyzed by electron microscopy. Several ultrastructural features suggest that they are closely related to sympathetic neuroendocrine glands and autonomic ganglia: the chief cells synthesize intensely osmiophilic cytoplasmic granules, occasionally develop neuroid processes, and are intimately associated with neurilemmal sustentacular cells. Othe...
متن کاملUltrastructure of the Carotid Body
An electron microscope investigation was made of the carotid body in the cat and the rabbit. In thin-walled blood vessels the endothelium was fenestrated. Larger vessels were surrounded by a layer of smooth muscle fibers. Among the numerous blood vessels lay groups of cells of two types covered by basement membranes. Aggregates of Type I cells were invested by Type II cells, though occasionally...
متن کاملTransports of delight
pictures above are of purified intracellular transport vesicles. Each has a 'COP II' membrane coat made up of Sec proteins (first identified for their function in secretion from yeast cells). The vesicles transport secretory and membrane proteins from the endoplasmic reticulum to the Golgi complex in yeast, and homologous COP II components have been identified in plants and in mammalian cells. ...
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ژورنال
عنوان ژورنال: Horticultura Brasileira
سال: 2016
ISSN: 0102-0536
DOI: 10.1590/s0102-05362016003005