منابع مشابه
Morphogenesis in Micrasterias. II. Patterns of morphogenesis.
The final form of the polar lobe and lateral wings of developing semicells of M. rotata results from combined action of three growth processes: tip growth, branching and lobe broadening. Tip growth unaccompanied by branching or broadening occurs during normal development in M. radiata, but is observed only under abnormal conditions (e.g. raised temperature) in M. rotata. When branching and broa...
متن کاملSplitting of Micrasterias fimbriata (Desmidiales, Viridiplantae) into two monophyletic species and description of Micrasterias compereana sp. nov
The freshwater microalgal genus Micrasterias C.Agardh ex Ralfs represents a monophyletic lineage of the Desmidiaceae (Škaloud et al. 2011). Besides the species traditionally included in this genus on the basis of the morphological data (see e.g. Prescott et al. 1977, Růžička 1981, Coesel & Meesters 2007), the Micrasterias lineage also includes several morphologically dissimilar taxa, such as Mi...
متن کاملCytoplasmic organization during pattern formation in the alga Micrasterias.
Using an improved fixation for electron microscopy, we have observed an ordered cytoplasmic organization during pattern formation in the alga Micrasterias. At the earliest stages of morphogenesis (the bulge to 3-lobe stage), as observed previously, electron-dense vesicles and endoplasmic reticulum were found towards the cell periphery, while mitochondria and Golgi material were located internal...
متن کاملMicrasterias as a Model System in Plant Cell Biology
The unicellular freshwater alga Micrasterias denticulata is an exceptional organism due to its complex star-shaped, highly symmetric morphology and has thus attracted the interest of researchers for many decades. As a member of the Streptophyta, Micrasterias is not only genetically closely related to higher land plants but shares common features with them in many physiological and cell biologic...
متن کاملA Chick Embryo in-Vitro Model of Knee Morphogenesis
Background: In this feasibility study, a mechanically loaded in-vitro tissue culture model of joint morphogenesis using the isolated lower extremity of the 8 day old chick embryo was developed to assess the effects of mechanical loading on joint morphogenesis. Methods: The developed in-vitro system allows controlled flexion and extension of the chick embryonic knee with a range of motion of ...
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ژورنال
عنوان ژورنال: Development
سال: 1975
ISSN: 1477-9129,0950-1991
DOI: 10.1242/dev.33.1.117