Karyological Anatomy of Fibre Development in the Leaves of Agave americana L. var. marginata alba Trel.

Tipo de material: Texto

TextoSeries ; Ann. Bot., 35, p.421-427, 1971Trabajos contenidos:

Datta, P.C

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Resumen: From a study of 100 metaphase plates in root-tip squashes and 75 fibre-cells in leaf-base squashes, it is found that the chromosome number, although having an irregular type of variation, commonly tend to occur as multiples of 15, the haploid number. In developing fibre-cells the tendency of complete endomitosis (resulting in 2«, 4*1, and 8ra numbers)is stronger than the partial endomitosis (resulting in sn, 6n, jn, etc.). Nuclear volumes of fibrecells also roughly correspond to 2K, 4K, and K. Significant linear correlations between chromosome number and nuclear volume and between nuclear volume and fibre-cell volume has been obtained. Thus the development and differentiation of fibres involve complete and partial endomitoses, accompanied by somatic non-disjunction phenomena.

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Documentos solicitados	CICY Documento préstamo interbibliotecario	Ref1	B-14666 (Browse shelf(Opens below))	Available

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From a study of 100 metaphase plates in root-tip squashes and 75 fibre-cells in leaf-base squashes, it is found that the chromosome number, although having an irregular type of variation, commonly tend to occur as multiples of 15, the haploid number. In developing fibre-cells the tendency of complete endomitosis (resulting in 2«, 4*1, and 8ra numbers)is stronger than the partial endomitosis (resulting in sn, 6n, jn, etc.). Nuclear volumes of fibrecells also roughly correspond to 2K, 4K, and K. Significant linear correlations between chromosome number and nuclear volume and between nuclear volume and fibre-cell volume has been obtained. Thus the development and differentiation of fibres involve complete and partial endomitoses, accompanied by somatic non-disjunction phenomena.

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