Abstract:
Water contents of soil, fine and tuberous roots of Asphodelus microcarps "Sulzm" in addition to the root osmotic potentials (O.P), metabolites and nutrients were studied during the dormant period. The study revealed that fine and tuberous roots water contents depends on soil moisture at the root horizon in the beginning of the dormant period. Fine roots showed lower O.P. than tuberous roots which indicated the dependance of translocation on water potential rather than solute potential. Gradients in O.P. between fine and tuberous roots occurred only at the end of the dormant period and starts of the new vegetative season. The decrease in O.P. in tuberous roots depends mainly on the hydrolysis of polysaccharides and accumulation of Proline and glycine betaine. Nutrients decreased the O.P. in fine roots at the beginning of the dormant period but their role in osmoregulation was not clear during this period.
Page(s):
409-414
DOI:
DOI not available
Published:
Journal: Science International, Volume: 4, Issue: 4, Year: 1992