Morphogenesis in a green alga, Micrasterias
نویسندگان
چکیده
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 کاملSalt stress-induced cell death in the unicellular green alga Micrasterias denticulata
Programmed cell death (PCD) is a key element in normal plant growth and development which may also be induced by various abiotic and biotic stress factors including salt stress. In the present study, morphological, biochemical, and physiological responses of the theoretically immortal unicellular freshwater green alga Micrasterias denticulata were examined after salt (200 mM NaCl or 200 mM KCl)...
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 کاملPhosphorus-limited growth of a green alga and a blue-green alga.
The phosphorus-limited growth kinetics of the chlorophyte Scenedesmus quadricauda and the cyanophyte Synechococcus Nägeli were studied by using batch and continuous culturing techniques. The steady-state phosphate transport capability and the phosphorus storage capacity is higher in S. Nägeli than in S. quadricauda. Synechococcus Nägeli can also deplete phosphate to much lower levels than can S...
متن کاملEvolutionary rescue of a green alga kept in the dark.
Chlamydomonas (Chlorophyta) can grow as a heterotroph on medium supplemented with acetate in the dark. A long-term experiment to investigate adaptation to dark conditions was set up with hundreds of replicate lines. Growth was initially slow, and most lines became extinct when transferred every few weeks. Some lines survived through the expansion of lineages derived from cells with extreme phen...
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: PLANT MORPHOLOGY
سال: 2000
ISSN: 1884-4154,0918-9726
DOI: 10.5685/plmorphol.12.32