Document Type: Original Article

Authors

Department of Agriculture, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran

Abstract

Objective: In order to investigate effects of different concentration of gibberlic acid and poly amines on germination and early growth of Pishtaz cultivar under salinity stress. Methods: The experiment was carried out as factorial based on completely randomized design with four replicates in laboratory of agronomy and plant breeding of agricultural department, Islamic Azad University, Varamin-Pishva Branch in 2014. The first factor was salinity with four levels (S1:3.78, S2: 5.95, S3: 10.25 and S4: 12.87 ds/m) and the second factor was six level of hormones including H0: control, H1:GA3 (100mg/litr)، H2:GA3 (150mg/litr)، H3:GA3 (200mg/litr)، H4: Putrescine (2.5m/mol)، H5: Spermidine (5m/mol) and H6: GA3(100mg/litr) + Spermidine (5m/mol). coleoptile and cleorhiza length, cleorhiza number, coleoptile and cleorhiza dry weight, germination percent and number of damaged seeds were measured. Results: Analysis of variance showed significant difference among salinity and hormone levels for coleoptile and cleorhiza length, cleorhiza number at 1% of probability level and no difference for the rest properties. It was concluded that following increasing salinity, application of different levels of GA3 had no significant effect on germination process of Pishtaz cultivar.

Keywords

Achard P, Cheng H, Grauwe LD, Decat J, Schoutteten H, Moritz T, Dominique VDS, Peng J, Harberd NP, 2006. Integration of plant responses to environmentally activated phytohormonal signals. Science 311: 91-94
Aziz, A., J. Martin-Tanguy and F. Larher, 1997. Plasticity of polyamine metabolism associated with high osmotic stress in rape leaf discs and with ethylene treatment. Plant Growth Regul., 21: 153-163.
Basalah MO, Mohammad S . 1999. Effect of salinity and plant growth regulators on seed germination of Medicagosativa L. Pakistan J Biol Sci 2: 651-653
Desingh, R, G. Kanagaraj, 2007. Influence of salinity stress on photosynthesis and antioxidative systems two cotton varieties. Gen. Appl. Plant Physiol., 33: 221-234.
Francois L. E., Grieve C. M. Maas E. V. Donovan T. J. and Lesch S. M. ,2000. Time of salt stress affects growth yield components of irrigated wheat. Agronomy Journal, 86, 100ñ107.
Galston, a. w. 1983. Plyamines as dulaors of plant development. Biscience 33:382-388.
Galston, a. w. and r. kaur-sawhney. 1987. Plyamines as endogenous growth regulators. In: davies, p. j., ed. Plant hormones and heir role in plant growh and development. Martinus nijhoff publishers, drdrecht,t he netherlands.
Pp.280-295.
Gomma, A.S.A., 1999. Wheat improvement in Egypt: History and future prospects. Egypt. J. Plant Breeding.3: 1-14.
Majid Ghorbani Javid1, Ali Sorooshzadeh, Foad Moradi, Seyed Ali Mohammad Modarres Sanavy1, Iraj Allahdadi,2011. The role of phytohormones in alleviating salt stress in crop plants. Australian Journal of crop
science: AJCS:726-734
Hisamatsu, T.,2000. The role of gibberelllin in biosynthesis in the control of growth and flowering in Mathiola incana. Physiol. Plant., 109, 97-105.
Iqbal M, Ashraf M ,2010.Gibberellic acid mediated induction of salt tolerance in wheat plants: Growth, ionic partitioning, photosynthesis, yield and hormonal homeostasis. Environ Exp Bot doi:10.1016/j.envexpbot.
2010.06.002
Iqpal, M., M. Ashraf; A. Jamil U.R and Shafiq, 2006. Does seed priming induce changes in the levels of some endogenous plant hormones in hexaploid wheat plant under salt stress. J. of Integrative Plant Biology,48(2): 181-189.
Kumar B, Singh B ,1996. Effect of plant hormones on growth and yield of wheat irrigated with saline water. Annu Agr Res 17: 209-212
Munns, R., R. A. James and A. Lauchli. 2006. Approaches to increasing the salt tolerance of wheat and other cereals. J. Exp. Bot. 57: 1025-1043.
Nayyar H, Walia DP, Kaistha BL ,1995. Performance of bread wheat (Triticum aestivum L.) seed primed with growth regulators and inorganic salts. Indian J Agr Sci 65:116-122
Prakash L, Prathapasenan G ,1990. NaCl and gibberellic acid induced changes in the content of auxin, the activity of cellulose and pectin lyase during leaf growth in rice (Oryza sativa). Ann Bot 365: 251-257.
Rawson, H. M., Richards, R. A. & Munns, R. ,2002. An examination of selection criteria for salt tolerance in wheat, barley and triticale. Australian Journal of Agricultural Research, 39(5), 759ñ772.
Shakirova, F.M., A.R. Sakhabutdinova, M.V. Bezrukova, R.A. Fathkutdinov and D.R. Fatkhutdinova, 2003.Changes in the hormonal status of wheat seedlings induced by salicylic acid and salinity.Plant Sci., 164:317.
Trewavas, A.1981. How Do Plant Growth Substances Work? Plant, Cell Environ. 4: 203-228.