Periodicity of Pollen Development and Quantitative Cytochemistry of Exine and Intine Enzymes in the Grasses Lolium perenne L. and Phalaris tuberosa L

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 wal...

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Bibliographic Details
Published in:Annals of botany 1980-02, Vol.45 (2), p.131-141
Main Authors: VITHANAGE, H. I. M. V., KNOX, R. B.
Format: Article
Language:English
Subjects:
acid phosphatase
Allergens
Anthers
canary grass
enzyme activities
Enzymes
esterase
Grains
Histocytochemistry
Lolium perenne L
Phalaris tuberosa L
Phosphatases
Plants
Pollen
pollen development
quantitative cytochemistry
ryegrass
Spores
Vacuoles
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Summary: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.
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a085804