Document Type : Original Article
Authors
1 Department of Natural Resources, Institute of Applied Scientific Higher Education of Jahad-e Agriculture, Iran
2 Department of Medicinal Plants, Applied Scientific University of Jahad-e Agriculture, Hamedan, Iran
Abstract
Objective: Germination is one of the most important stages of plants growth that affected by environmental stresses, especially drought and salinity. Methods: In order to study of Artichoke germination under different levels of salinity and drought, two separate experiments were performed. The four levels of salinity by NaCl (0, 50, 100, 150 mM) with three replications and five levels of drought by PEG (0, 10%, 15%, 20% and 25%) with three replications were used based on completely randomized design. Results: Results showed that drought and salinity stresses reduced significantly germination rate, shoot length, root dry Weight and shoot dry Weight. In salinity condition, there was insignificant difference between treatments for germination percent, but in drought condition, there was significant difference. Moisture range optimum for germination was determined non-stress to 20% PEG concentration. It seemed that among traits, shoot length was more sensitive than others to salinity and drought stresses. It can be concluded that Artichoke can tolerate salinity up to 150 Mm, but in drought conditions it cannot germinate in 25% PEG.
Keywords
developmental stages. African Journal of Biotechnoly. 10:5121-5136.
Almodares, A., Hadi, M.R. and Dosti, B. (2007). Effects of salt stress on germination percentage and seedling growth in sweet sorghum cultivars. J. Biolog. Sci. 7(8):1492- 1495.
Asghari, M. (2002). Ethylene effect on osmotic adjustment and growth of axial and cotyledon tissues of sunflower seeds under drought stress. Industry Journal of Agricultural Science. 7: 137-145. (In Persian).
Bannayan M, Nadjafi F, Tabrizi L. and Rastgoo M (2006). Seed germination and dormancy breaking techniques for Ferula gummosa and Teucrium polium. J Arid Environments. 64(3): 542-547.
Barzegar, A. and Rahmani, M. (2004). The effects of environmental stresses on germination stimulation of Hyssopus officinalis. The proceedings of the second conference on herbal plants, Shahed University, P. 67.
Davatgar, N., Neishabouri, M.R., Sepaskhah, A.R. and Soltan, A. (2009). Physiological and morphological responses of rice (Oryza sativa L.) to varying water stress management strategies. Int. J. Plant Prod. 3: 19-32.
El-Keblawy, A. and Al-Rawai, A. (2006). Effects of seed maturation time and dry storage on light and temperature requirements during germination in
invasive Prosopis juliflora. Flora - Morphology, Distribution. Functional Ecology of Plants. 201: 135–143.
F.A.O. Production year book. 2005. Food and Agricultural Organization of United Nation, Rome, Italy, 51:209P.
Farsiani, A. and Ghobadi, M.E. (2009). Effects of PEG and NaCl stress on two cultivars of corn (Zea mays L.) at germination and early seedling stages. World Acad. Sci. Eng. Tech. 57: 382-385.
Figueiredo, E., Albuquerque, M.C. and De Carvalho, N.M. (2003). Effect of type of environmental stress on the emergence of sunflower (Helianthus annuus L.), Soybean (Glycine max (L.) Merril) and maize (Zea mays L.) seeds
with different levels of vigor. Seed Sci. Tech. 31, 465-469.
Ghanbari, A., Najafi, M.A., Al-Athar, M. and Mohajeri, F. (2013). Effect of priming on morphological characteristics, proline, carbohydrate and essential oil contents of basil seed (Ocimum basilicum) under salt stress. International Journal of AgriScience. 3(4), 308- 315.
Gholamin, R. and Khayatnezhad, M. (2010). Effects of polyethylene glycol and NaCl stress on two cultivars of wheat (Triticum durum) at germination and early seeding stages. American – Eurasian J. Agric. Environ. Sci. 9(1): 86-90.
Hadi, M., Taheri, R. and Sharif, M. (2007). Evaluation of salinity effect on seed germination of Seidlitzia Rosmarinus. Journal of Research and Productivity. 76:151-157.
He, L., Jia, X. and Gao Li, Z.R. (2011). Genotype-dependent responses of wheat (Triticum aestivum L.) seedlings to drought, UV-B radiation and their combined stresses. African Journal of Biotechnoly. 10: 4046-4056.
Jajarmi, V. (2009). Effect of water stress on germination indices in seven wheat cultivar. Acad Sci Eng Technol. 49: 105-106.
Janmohammadi, M., Moradi Dezfuli, P. and Sharifzadeh, F. (2008). Seed invigoration techniques to improve germination and early growth of inbred line of maize under salinity and drought stress. Gen. Appl. Plant Physiol.
34(3-4): 215-226.
Khammari, I., Sarani, S.A. and Dahmardeh, M., (2007). The effect of salinity on seed germination and growth in six medicinal plants. Iranian Journal of Medicinal and Aromatic Plants. 23(3): 331-339. (In Persian).
Khayatnezhad, M., Gholamin, R., Jamaati – e – Somarin, S.H., and Zabihi – Mahmoodabad, R. (2010). Effects of peg stress on corn cultivars (Zea mays L.) at germination stage. World Appl. Sci. J. 11(5), 504-506.
Kulkarni, M., and Deshpande, U. (2007). In vitro screening of tomato genotypes for drought resistance using polyethylene glycol. Afr. J. Biotech. 6(6): 691-696.
Li, Z., Bian, M., Wu, Z., Zhang, X., Yang, Q. and Huang, C. (2011). Isolation and drought-tolerant function analysis of ZmPti1-1, a homologue to Pti1, from maize (Zea mays L.). African Journal of Biotechnoly. 10: 5327-5336.
Misra, N. and Dwivedi, U.N. (2004). Genotypic differences in salinity tolerance of green gram cultivars. Plant Sci. 166: 1135-1142.
Mohammadkhani, N. and Heidari, R. (2008). Water stress induced by polyethylene glycol 6000 and sodium chloride in two maize cultivars. Pak. J. Biol. Sci. 11(1): 92-97.
Mostafavi, K.H. (2011). An evaluation of safflower genotypes (Carthamus tinctorius L.), seed germination and seedling characters in salt stress conditions. Afr. J. Agric. Res. 6(7): 1667-1672.
SAS Institute Inc (2003). SAS Online Doc, Version 9.2. SAS Institute Inc., Cary, NC.
Seyyed Sharifi, R. (2007). The study of the effect of salinity on germination variables of MS indices. The third conference on herbal plants, Shahed University, Tehran, p.207.
Soltani, A., Gholopoor, M. and Zeinali, E. (2006). Seed reserve utilization and seedling growth of wheat as affected by drought and salinity. Environ. Exp. Bot. 55:195-200.
Takel, A. (2000). Seedling emergence and growth of sorghum genotypes under variable soil moisture deficit Agronomy Journal. 48, 95-102.
Zahtabian, G.h., Azarnivand, H., Javadi, M. and Shahriari, A. (2005). Evaluation of salinity stresses effect on germination of two range species of Agropyron, Journal of Desert. 10 (2): 301-310.
Zia, S. and Khan, M.A. (2004). Effect of light, salinity, and temperature on seed germination of Limonium stocksii. Canadian Journal of Botany. 82, 151–157.
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