Document Type : Articles
Author
Horticulture and Landscape department, collage of Agriculture, Tikrit University, Iraq
Abstract
Salinity affects plant growth by causing physiological and morphological changes, which reduces its vegetative system. This appears through decreases in stem length, number of leaves, as well as lateral branches and diameter of plant organs.There are two types of salinity: soil salinity and water salinity. Soil salinity means soil characterized by a high percentage of dissolved salts, mostly of which are chlorides, sulfates and carbonates, to a degree harmful to plant growth. If the soil contains dissolved salts in high quantities, water potential can be reduced to negative level. A distinction between salt stress and ionic stress must be noticed. The first term is used when salt concentration is so high that water potential of growing substrate drops to a significant level (05.0 - 1.0 MPa). If the decrease in water potential was slight and undetectable, the effect here is in the form of ionic stress. A simplified definition of salt stress can be given as an increase in the concentration of salt in plant cells to the degree that affects the physiological properties. This is due to a decrease in the water potential of growing substrate which negatively affects the morphological characteristics of plant. Water potential determines the water movement from the soil to the root or from one cell to another.
Keywords
- Alori ET, Glick BR, Babalola OO (2017) .Microbial phosphorus solubilization and its potential for use in sustainable agriculture. Front Microbiol 8:971.
- Begum M. K., M. O. Islam, M. A. S. Miah , M. A. Hossain and N. Islam (2011). Production of Somaclone In vitro for Drought Stress Tolerant Plantlet Selection in Sugarcane (Saccharum officinarum L.), Agriculturists 9(1&2): 18-28.
- Elsahookie , M . ( 2013) . Some Environmental . Data Concerns Crop Productivity in Baghdad Dept. of Field Crop, Coll. of Agric., Univ. of Baghdad. pp. 13.
- Fatma, M.; Asgher, M.; Masood, A. and Khan, A. (2014). Excess sulfur supplementation improves photosynthesis and growth in mustard under salt stress through increased production of glutathione Environ. Exp. Bot., 107: 55-63 .
- Flowers, T. J., and Colmer, T. D. (2008). Salinity tolerance in halophytes. New Phytologist, 179(4), 945-963.
- Flowers, T.J. (2004). Improving crop salt tolerance .Journal of Experimental Botany ,55(396):307-319.
- Grattan,S.T.and Grieve ,C.M.(1991).Salinity mineral relations in hoertticltural Crops.Sci.Hortic .,78(1-4):127-157.
- Heuvelink ,E.,Bakker,M.and Sthange llini,C.(2003).Salinity effects on fruit Xield invegetable Crop :asimulation Study ActaHort.,609 :133- 140.
- Hillel , D . ( 2000) . Salinity Management of Sustainable Irrigation. The World Bank Washington, D. C., USA.
- Jenks, M. A., P. M. Hasegawa, and S. M. Jain (edrs). (2007). Advances in Molecular Breeding toward Drought and Salt Tolerant Crops. Springer Publ., Netherland. 817.
- Jury, W., and H.Vaux. (2007). The emerging global water crisis: Managing scarcity and conflict between water users. Adv. In Agronomy. 95: 1-76.
- Kaya, C. : Tuna, A.L. and Yokaş, I. ( 2009). The role ofplantHormones in plants under salinity Stress. In : M. Ashraf : M. Ozturk And H.R. Athar (Eds.) Salinity And Water Stress : Improving Crop Efficiency .springer sciency &Business Media B.v.chapter,5:45-50.
- Koca , H., M. O. Bor. F. Zdemir and I. Turkan (2007). The effect of salt stress on lipid peroxidation , antioxidative enzymes and proline content of sesame cultivars. Environ Exp. Bot . 60, 344-351.
- Ksouri, R.; Megdiche, W.; Debez, A.; Falleh, H.; Grignon, C.; Abdelly, C. Salinity (2007). effects on polyphenol content and antioxidant activities in leaves of the halophyte Cakile maritime . Plant Physiol . Biochem ., 45 244 –249. [CrossRef].
- Lauchli, A., and U. Luttge (edrs.).( 2004). Salinity: Environment – Plants – Molecules Kluwer Academic Publ. pp. 552.
- Lewit,J.(1980).Responses of plants to Environment al Stresses .Vol.:II.Academic Pres,New York,PP.607. .
- Manik ,P,N,R., Zhou-Yan ,D and Wen-Jun,L .(2019),effect of salt stress on plants and Role of Microbes in Promoting Plant Growth Under salt stress. Microorganisms in saline Environments : Strategies and Function . pp423-435.
- Mishra, A., and Choudhuri, M. A. (1999). Effects of salicylic acid on heavy metalinduced membrane deterioration mediated by lipoxygenase in rice. Biologia Plantarum, 42(3), 409-415.
- Muhsen ,N , H.(2021). Review of Reclamation of salinity affected soils by leaching and their effect on soil properties and plant growth.J:Tikrit Agri Scie . ISSN:1646-1813.
- Munns, R. (1993). Physiological processes limiting plant growth in saline soils: some dogmas and hypotheses. Plant, Cell & Environment, 16(1), 15-24.
- Munns, R. (2002). Comparative Physiology of salt and water stress Plant Cell Environ.,25:239-245.
- Munns, R. and Tester, M. (2008). Mechanisms of salinity tolerance. Annual Review of Plant Biology, 59: 651-681.
- Oztekin,G.B.and Tuzel ,Y.(2011).Comparative Salinity responses among tomato genotype and root stocks ,Pak.J.Bot.,43(6):2665- 2672.
- Parida, A.K. and Dass, A.B. (2005). Salt tolerance and salinity effects on plants. a review. J. Ecotoxicology and Environmental safety, 60 (3): 324-349.
- Ramakrishna,A.and Ravishankar,G.A.(2011).In fluence of abiotic stress Signals on Secondary metabolites in plants .Plants signaling &Behavior 6(11),1720-1731.
- Siddiky ,M.A.,Khan M.S.,Rahman M.M.,Uddin M.K.(2014).performance of tomato (lysopersicon esulentum ) germplasms growin in Bangladesh for Salinity tolerance ,Agri Vita ,36،128-133.
- Smith, M.A.L.; Spomer, L.A.; Shibli, R.A. and Knight, S.L. (1992).Effect of NaCl salinity on miniature dwarf tomato, shoot and root growth responses, fruit production and osmotic adjusment. J. Plant Nutrition., 15 : 2329- 2341.
- Starck . Z., and M.Kozinska (1980). Effect of phytochormones on absorption and distribution of ions salt-stressed bean plants . Acta Soc . Bot . Pol.49(1-2), 17.
- Zhu, J.K. (2002). Salt and drought stress signal transduction in plants. Ann. Rev. Plant Biol.,53: 247-273.
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