The distribution of plastids in mitosis of guard cell mother cells of haploid trifolium hybridum L

Butterfass, T.

Planta 84(3): 230-234

1969


ISSN/ISBN: 0032-0935
PMID: 24515426
DOI: 10.1007/bf00388108
Accession: 017343920

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Abstract
In order to investigate whether during mitosis of guard cell mother cells the plastids are distributed to the daughter cells at random, a haploid of Trifolium hybridum, a species with only three to four chloroplasts in one diploid guard cell, was searched for and found. As expected, the guard cell mother cells in this plant contained only about two plastids. If distribution to the daughter cells would occur strictly at random, among the guard cell pairs with two chloroplasts the pairs with 1/1 and those with 2/0 chloroplasts should appear in equal amounts. However, 159 pairs of type 1/1 and only 35 pairs of type 2/0 were found, i.e., 18% of type 2/0 (upper limit of 99% confidence interval: 25%), indicating that the plastids have been apportioned to a fairly great degree. The result may be understood by considering that the plastids in guard cell mother cells are not scattered at random throughout the cell space, but are more regularly spread as are the chloroplasts in adult cells.