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Origin of the Cones of the Multipolar Spindle in Gladiolus

Anstruther A. Lawson
Botanical Gazette
Vol. 30, No. 3 (Sep., 1900), pp. 145-153
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The above observations may be summarized as follows: As nuclear division approaches, a granular zone accumulates about the nucleus. This zone in every respect resembles the perikaryoplasm so characteristic of the pollen mother cells of Cobaea. A close network or felted zone of kinoplasmic fibers is formed immediately outside of and completely surrounding the nuclear wall. This is probably developed from the perikaryoplasm. This network grows out into several projections which become the cones of the multipolar figure. The nuclear membrane persists until the cones are almost fully developed. The spindle fibers are formed by the elongation of the meshes of the network composing the cones. Neither the nuclear wall, nucleolus, nor linin take any essential part in the formation of the achromatic figure. The cones of the multipolar figure fuse and arrange themselves in two groups and form a bipolar spindle.

Notes and References

This item contains 22 references.

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