Effects of Desiccation, NaCl and Polyethylen Glycol Induced Water Potentials on the Sprouting of Glycyrrhiza glabra Rhizome Buds

Document Type : Research Paper

Authors

Abstract

The effects of desiccation and NaCl and Polyethylen Glycol (PEG) induced water potentials on rhizome bud sprouting of the perennial weed, Glycyrrhiza glabra were investigated in separate laboratory experiments laid out in completely randomized designs. Each treatment was replicated four times. The water potentials of NaCl and PEG used were 0, -0.4, -0.8, -1.2 and -1.6 MPa. Desiccation experiments were conducted in factorial arrangements of treatments. Factors included two classes of rhizome diameter, thin (rhizome specific weight 0.05-0.4 g cm-1) and thick (rhizome specific weight of 0.4-1.6 g cm-1) and desiccation duration (exposing rhizome fragments to sunlight) of six levels (0, 6, 8, 12, 24 and 48 h). There were no significant differences between 0 and -0.4 MPa of PEG solutions. NaCl treatments from -0.4 to -1.2 and PEG treatments from -0.8 to -1.6 MPa drastically reduced rhizome bud sprouting and its rate. No bud sprouting was observed in –1.2 and –1.6 MPa of NaCl solution. For all treatments, NaCl was found to be more inhibitory than corresponding potentials of PEG solution. This Correspondence to: N. Nezamabadi; Nooshin327@yahoo.com N.Nezamabadi et al. 42 can be attributed to the toxicity of NaCl ions. No bud survived after 48 and 36 hours desiccation in thick and thin rhizomes, respectively. Complete inhibition of sprouting occurred when rhizomes were desiccated to 42% and 70% of their original weight for thick and thin rhizomes, respectively.

Keywords

References

Aldrich, R. J. 1984. Reproduction from vegetative parts. In: Weed-crop Ecology (Aldrich, R. J. , ed.), 90-110, Breton publisher. Almansouri, M. & Kinet, J. 2001. Effect of salt and osmotic stress on germination in durum wheat. Plant soil 23: 243-245. Aparecida Delachiave, M. & Zambello Depinho, S. 2003. Germination of senna occidentalis link: Seed at different osmotic potential levels. Brazilian Archives of Botany and Technology 163-166. Anderson, L. 1977. Characteristics of Johnson grass rhizomes. Weed science 8: 402-406. Azarnivand, H. & Jafarian Jolodar, Z. 2003. The effect of salinity stress on two species of Agropyron . Journal of Biaban 4: 51-62. Bajji, M. & Kinet, J. 2002. Osmotic and inionic effects of NaCl on germination, early seedling growth, and ion content of Atriplex halimus. Cannadian Journal of Botany 80: 297-304. Berkat, O. & Briske, D. D. 1982. Water potential evaluation of three germination substrates utilizing PEG. Agronomy Journal 74: 518-521. Kafi, M. & Goldani, M. 2001. Effect of water potential on wheat, sugar beet and chickpea germination. Journal of agricultural science and technology 15: 121-132. Katembe, W. J. Ungar, I. A. & Mitchell, J. P. 1998. Effect of salinity on germination and seedling growth of two Atriplex species. Annals of Botany 82: 167-175. Koocheki, A. R. & Shahroudi, H. 1996. The effect of water potential and seed size on seed germination characteristics of chickpea. Journal of Biaban 1: 53-66. King, A. C. & Oliver, L. R. 1994. A model for predicting large crabgrass (Digitaria sanuinalis) emergence as influenced by temperature and water potential. Weed Science 42: 561-567. Livington, N. J. & De Jong, E. 1990. Matric and osmotic potential effects on seedling emergence at different temperature. Agronomy Journal 82: 995-998. Rahimian mashhadi, H. Baghery kazemabad, A. and Paryab, A. 1991. Effects of PEG and NaCl water potential and different temperatures on dry land wheat ecotype. Journal of agricultural science and technology 5: 37-46. SAS Institute Inc. 1989. SAS/STATS® User’s guide, Version 6, Fourth Edition, Volume 1. 943pp. Soteres, J. K. & Murray, D. S. 1982. Root distribution and reproductive biology of Honeyvine milkweed (Cynanchum laeve). Weed Science 30: 158-163. Sullivan, P. 2002. Alternative control of johnsongrass.{on line:[http//.. www.atrra.ncat.org]. Thomas, P. E. L. 1969. Effects of desiccation and temperature on survival of Cyperus esculentus tubers and Cynodon dactylon rhizomes. Weed Research 9:1-8 Tu, M. Hurd, C. & Randall, J. M. 2001. Weed control methods handbook. The nature conservancy. {on line :[ http// tncweeds. Ucdavis.edu].
Iranian Journal of Weed Science
Volume 1, Issue 1 - Serial Number 1
No 1 & 2
September 2005
Pages 41-50

Files

Share

How to cite

Statistics