Ultrastructural, autoradiographic and electrophoretic examinations of Chara tomentosa spermiogenesis
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چکیده
منابع مشابه
GA3 content in young and mature antheridia of Chara tomentosa estimated by capillary electrophoresis.
The content of gibberellic acid (GA3) in male sex organs of Chara tomentosa L. was estimated using capillary electrophoresis. Young antheridia contained 0.25 microg GA3 while mature ones 0.48 microg per antheridium. Although there are significant differences in GA3 content in antheridia between C. vulgaris and C. tomentosa, these values calculated per one spermatid are 2.4 and 3.3 pg, respectiv...
متن کاملCytochemical and immunocytochemical studies of the localization of histones and protamine-type proteins in spermatids of Chara vulgaris and Chara tomentosa.
Spermiogenesis in Chara algae, which has been divided into 10 phases (sp I-X), is similar to spermiogenesis in animals. The most important process during spermiogenesis in animals is remodeling of chromatin leading to "sleeping genome", being the result the exchange of histone proteins into protamine-like proteins. Cytochemical studies showed in both Chara species (C. vulgaris, C. tomentosa) th...
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We used [3H]-N-succinimidylpropionate ([3H]-N-SP) to covalently label endogenous intra-axonal proteins within the nerve in order to study their bidirectional transport. At the time of injection virtually all of the labeled proteins are found at the injection site. At later times specific patterns of labeled proteins are found within the nerve both proximal to and distal from the injection site,...
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Ultrastructural and autoradiographic studies of nucleoli in soybean root meristematic cells in seedlings: (1) grown for 3 days at 25 degrees C (control), (2) grown for three days at 25 degrees C and for 4 days at 10 degrees C, and (3) grown as in (2) and recovered for 1 day at 25 degrees C were carried out. Control nucleoli had dense structure and a few small nucleolar vacuoles. Chilled plant n...
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Root meristem nucleoli from soybean (Glycine max. cv. Aldana) seedlings germinated for 3 days at 25 ̊C and then for 4 days at 10 ̊C or still at 25 ̊C (control) were examined. Chill was observed to reduce root meristematic zone growth 15-fold. Nucleoli doubled their volume at 10 ̊C. Autoradiographic studies showed that after 20 min H-uridine incubation at 10 ̊C, incorporation of this precursor (posti...
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ژورنال
عنوان ژورنال: Acta Societatis Botanicorum Poloniae
سال: 2014
ISSN: 2083-9480
DOI: 10.5586/asbp.2002.024