Pollen-wall proteins: quantitative cytochemistry of the origins of intine and exine enzymes in Brassica oleracea.
نویسندگان
چکیده
Simultaneous coupling methods for detection of acid phosphatase and non-specific esterase produce a coloured reaction product that is quantitatively related to enzyme content in freeze-sectioned Brassica pollen and tapetal cells. The intine-located acid phosphatase has 2 periods of synthesis: the first in late vacuolate period, associated with the completion of deposition of the intine polysaccharides; the second during pollen maturation, apparently reflecting cytoplasmic synthesis, Esterase activity accumulates in the tapetal cells until dissolution at early maturation period, when there is a dramatic rise in pollen-wall esterase activity, reflecting the transfer from tapetum to exine cavities. These quantitative studies confirm the gametophytic and sporophytic origins of the intine and exine proteins.
منابع مشابه
Pollen-wall proteins: release of the allergen Antigen E from intine and exine sites in pollen grains of ragweed and Cosmos.
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ورودعنوان ژورنال:
- Journal of cell science
دوره 21 2 شماره
صفحات -
تاریخ انتشار 1976