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© 1979 Oxford University Press

RESEARCH-ARTICLE

Polyribosome Content in Young and Aged Wheat Leaves Subjected to Drought

N. STEELE SCOTT1,2, RANA MUNNS3,4 and E. W. R. BARLOW3

1Plant Physiology Unit, CSIRO Division of Food Research, Macquarie University North Ryde, N.S.W., 2113
2CSIRO Division of Horticultural Research Glen Osmond, S.A., 5064
3School of Biological Sciences, Macquarie University North Ryde, N.S.W., 2113
4Department of Agronomy, The University of Western Australia Nedlands, W.A., 6009

The effect of a droughting treatment on the polyribosome content of wheat leaves was markedly different on leaves of different ages. Growing leaves showed a large decrease in their polyribosome population, while fully expanded leaves showed no loss of polyribosomes compared with controls. These results suggest that the large reductions in polyribosome population observed in growing tissues are due to reductions in growth, rather than a direct effect of water stress.


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