MORPHOLOGICAL AND ANATOMICAL EFFECTS OF SEVERE DROUGHT ON THE ROOTS OF LOLIUM PERENNE L.
Article first published online: 28 APR 2006
Volume 105, Issue 3, pages 393–402, March 1987
How to Cite
JUPP, A. P. and NEWMAN, E. I. (1987), MORPHOLOGICAL AND ANATOMICAL EFFECTS OF SEVERE DROUGHT ON THE ROOTS OF LOLIUM PERENNE L. New Phytologist, 105: 393–402. doi: 10.1111/j.1469-8137.1987.tb00876.x
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- (Accepted 14 October 1986)
- Lolium perenne;
- lateral roots;
- root cortex;
- root hairs
Three experiments using soil-grown Lolium perenne plants were performed in order to investigate the effects of a gradually increasing drought stress on the death of root cells and the growth of lateral roots. Water potentials of -2 to -10 MPa caused death of the root cortex, but death of root tips occurred only at soil water potentials below -10 MPa. Low soil water potentials promoted lateral root initiation and elongation, the total length of lateral roots being between three and five times that of control plants. On rewetting severely droughted plants, root growth continued by elongation of existing, previously initiated, lateral roots.