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Periodicity of Pollen Development and Quantitative Cytochemistry of Exine and Intine Enzymes in the Grasses Lolium perenne L. and Phalaris tuberosa L.
, Knox R.B.
Annals of Botany
, 1980. V. 45. No. 2. P. 131–141
Журнал с антэкологическими публикациями.
Oxford University Press · email@example.com
Daily analysis of anther samples during flower development has enabled an estimation of the duration of defined developmental periods in pollen of the grass Phalaris tuberosa. A similar sequence of pollen development has been established for ryegrass, Lolium perenne, where changes in activity of wall enzymes have been followed using quantitative cytochemical methods. Acid phosphatase, an intine enzyme, showed two periods of activity: during the vacuolate period corresponding to deposition of the intine polysaccharides; and in the maturation period corresponding to cytoplasmic activity. Non-specific esterase showed greatest activity in the parietal tapetal cells until their dissolution early in the vacuolate period when an increase in pollen-associated activity occurred. These changes provide additional evidence for the transfer of tapetal proteins to exine sites.