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M. Vijayaraghavan, A. Shukla (1977)
Absence of Callose Around the Microspore Tetrad and Poorly Developed Exine in Pergularia daemiaAnnals of Botany, 41
S. Rhee, C. Somerville (1998)
Tetrad pollen formation in quartet mutants of Arabidopsis thaliana is associated with persistence of pectic polysaccharides of the pollen mother cell wall.The Plant journal : for cell and molecular biology, 15 1
M. Grayum (1991)
Systematic embryology of the AraceaeThe Botanical Review, 57
M. Smith, M. Mccully (1978)
A critical evaluation of the specificity of aniline blue induced fluorescenceProtoplasma, 95
E. Pacini, G. Franchi, M. Hesse (1985)
The tapetum: Its form, function, and possible phylogeny inEmbryophytaPlant Systematics and Evolution, 149
H. Halbritter (1998)
Preparing living pollen material for scanning electron microscopy using 2,2-dimethoxypropane (DMP) and critical-point drying.Biotechnic & histochemistry : official publication of the Biological Stain Commission, 73 3
K. Periasamy, J. Amalathas (1991)
Absence of Callose and Tetrad in the Microsporogenesis of Pandanus odoratissimus with Well-formed Pollen ExineAnnals of Botany, 67
(1988)
The systematic implications of pollen and spore ontogeny
J. Thiery (1967)
Mise en evidence des polysaccharides sur coupes fines en microscopie electroniqueJournal of Microscopy, 6
E. Reynolds (1963)
THE USE OF LEAD CITRATE AT HIGH pH AS AN ELECTRON-OPAQUE STAIN IN ELECTRON MICROSCOPYThe Journal of Cell Biology, 17
A. Spurr (1969)
A low-viscosity epoxy resin embedding medium for electron microscopy.Journal of ultrastructure research, 26 1
Martina Weber, H. Halbritter, M. Hesse (1999)
The Basic Pollen Wall Types in AraceaeInternational Journal of Plant Sciences, 160
N. Prakash, A. Lim, F. Sampson (1992)
Anther and Ovule Development in Tasmannia (Winteraceae)Australian Journal of Botany, 40
C. Mcconchie, R. Knox, S. Ducker, J. Pettitt (1982)
Pollen Wall Structure and Cytochemistry in the Seagrass Amphibolis griffithii (Cymodoceaceae)Annals of Botany, 50
Martina Weber, H. Halbritter, M. Hesse (1998)
The Spiny Pollen Wall in Sauromatum (Araceae)-with Special Reference to the EndexineInternational Journal of Plant Sciences, 159
Rowley, D. Ao (1977)
POLLEN DEVELOPMENT IN ARTEMISIA VULGARIS WITH SPECIAL REFERENCE TO GLYCOCALYX MATERIAL.
J. Pettitt, C. Mcconchie, S. Ducker, R. Knox (1984)
Reproduction in seagrasses: pollen wall morphogenesis in Amphibolis antarctica and wall structure in filiform grainsNordic Journal of Botany, 4
S. Mayo, J. Bogner, P. Boyce (1997)
The Genera of AraceaeWilldenowia, 1
E. Pacini, B. Juniper (1983)
The ultrastructure of the formation and development of the amoeboid tapetum inArum italicum millerProtoplasma, 117
• Background and Aims Arum alpinum has a quite uncommon pollen wall. A sporopolleninous ektexine is missing. The outermost pollen wall layer is formed by the endexine which is covered by polysaccharidic ornamentation elements. An ontogenetical investigation was accomplished to clarify pollen-wall development, with special reference to callose and pollen-wall development.• Methods Plants of Arum alpinum grown in their natural habitat were collected once a week within the vegetative period and processed for semi- and ultra-thin sectioning.• Key Results At any stage of pollen-wall formation callose is missing. Microspores are released from the tetrad by invagination of the amoeboid tapetum. The polysaccharidic wall ornamentations are formed by the tapetum.• Conclusions There appears to be no truth in the dogma that callose is essential for microspore separation and release from the tetrad. The lack of callose does not influence fertility but could be the reason for the uncommon pollen wall, where a sporopolleninous ektexine is missing.
Annals of Botany – Oxford University Press
Published: Feb 18, 2006
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