Acta Botanica Croatica, Vol. 33 No. 1, 1974.
Original scientific paper
Crown-Gall Tumors on Bean Leaves Induced by Agrobacterium tumefaciens (I 1-4 i B6)
Marijana Krsnik Rasol
; Hrvatska
Abstract
Agrobacterium tumefaciens, strains B6 and I1-4 and crown-gall tumors, which they induced on bean leaves, were investigated by means of light and electron microscopy. The results show:
1) When the bacteria of the strain I1-4 are reisolated from primary tumors their colonies show the S-forms as a rule. The view, that at low temperatures the R-form changes to the S-form, cannot be confirmed.
2) In the cells of both strains of Agrobacterium tumefaciens it has never been possible to prove any signs of the presence of a bacteriophage.
3) In living tumor cells the only cell organelles, which showed considerable ultrastructural changes, were the plastids. In other cell organelles no ultrastructural changes could be stated with certainty.
Keywords
Hrčak ID:
157912
URI
Publication date:
31.12.1974.
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