Pollen and translators were obtained from flowers rehydrated
in 3% phosphate-buffered glutaraldehyde. For light microscopy
the pollen was acetolysed according to the method of Erdtman
(1960), mounted in glycerine jelly and sealed with paraffin wax.
A minimum of 15 pollen tetrads were examined for every
specimen. Measurements were made with a light microscope.
For scanning electron microscopy (SEM), pollen was acetolysed,
air-dried on stubs, coated with gold and examined with a
Jeol Winsem 6400 microscope at 5 kV (Centre for Microscopy,
University of the Free State). The translators were mounted on
stubs with double-sided tape, coated with gold and examined
Pollen and translators were obtained from flowers rehydratedin 3% phosphate-buffered glutaraldehyde. For light microscopythe pollen was acetolysed according to the method of Erdtman(1960), mounted in glycerine jelly and sealed with paraffin wax.A minimum of 15 pollen tetrads were examined for everyspecimen. Measurements were made with a light microscope.For scanning electron microscopy (SEM), pollen was acetolysed,air-dried on stubs, coated with gold and examined with aJeol Winsem 6400 microscope at 5 kV (Centre for Microscopy,University of the Free State). The translators were mounted onstubs with double-sided tape, coated with gold and examined
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