Quantifying seed germination responses of Echinops and Centaurea, to salinity and drought stresses
Seed germination may significantly interrupt by water stress due to drought and salinity condition. Salinity can cause osmotic pressure and induce drought stress. Water deficit stress affect normal seed germination and reduce seedling vigor. The objective of this investigation was to determine the effect of drought and salt stresses on germination characteristics of Echinops ritro and Centaurea virgata. Seeds were germinated with the concentrations of sodium chloride (0, 50, 100, 150 and 200 mmol) or in polyethylene glycol PEG6000 (0, -0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa). The highest values of germination parameters were obtained with no osmotic potential or salinity stress. At treatment by PEG, the germination was severely decreased at -0.6 MPa. While, no germination occurred at- 0.8 MPa by PEG. Results revealed that under 118 Mmol salinity, the seed germination of Centaurea virgata declined to 43% which was as close as half of its total seed germination. However, 50% reduction in seed germination of Echinops ritro was observed at 193 mmol salinity. Results indicated Echinops ritro and Centaurea virgata germination was sensitive to both the stresses. However, seedling growth was more sensitive to PEG than NaCl.
Albacete AA, Martínez-Andújar C, Pérez-Alfocea F (2014). Hormonal and metabolic regulation of source-sink relations under salinity and drought: From plant survival to crop yield stability. Biotechnology Advances 32(1):12-30. https://doi.org/10.1016/j.biotechadv.2013.10.005
Bybordi A, Tabatabaei J (2009). Effect of Salinity stress on germination and seedling properties in canola cultivars (Brassica napus L.). Notulae Botanicae Horti Agrobotanici Cluj-Napoca 37(2)71-76. https://doi.org/10.15835/nbha3723299
Claeys H, Van Landeghem S, Dubois M, Maleux K, Inzé D (2014). What is stress? Dose-response effects in commonly used in vitro stress assays. Plant Physiology 165(2):519-527. https://doi.org/10.1104/pp.113.234641
Forni C, Duca D, Glick BR (2017). Mechanisms of plant response to salt and drought stress and their alteration by rhizobacteria. Plant and Soil 410(1-2):335-356. https://doi.org/10.1007/s11104-016-3007-x
Gupta B, Huang B, Gupta B, Huang B (2014a). Mechanism of salinity tolerance in plants: physiological, biochemical, and molecular characterization. International Journal of Genomics 1-18. https://doi.org/10.1155/2014/701596
ISTA (2013). International rules for seed testing. International Seed Testing Association. Retrieved 2020 May 4 from https://www.seedtest.org/
Kaya MD, Okçu G, Atak M, Çıkılı Y, Kolsarıcı Ö (2006). Seed treatments to overcome salt and drought stress during germination in sunflower (Helianthus annuus L.). European Journal of Agronomy 24(4):291-295. https://doi.org/10.1016/j.eja.2005.08.001
Lin J, Shi Y, Tao S, Yu X, Yu D, Yan X (2017). Seed-germination response of Leymus chinensis to cold stratification in a range of temperatures, light and low water potentials under salt and drought stresses. Crop and Pasture Science 68(2):188-194. https://doi.org/10.1071/CP16402
Michel BE, Kaufmann MR (1973). The osmotic potential of polyethylene glycol 6000. Plant Physiology 51(5):914-916. https://doi.org/10.1104/pp.51.5.914
Munns R, Tester M (2008). Mechanisms of salinity tolerance. Annual Review of Plant Biology 59:651-681. https://doi.org/10.1146/annurev.arplant.59.032607.092911
Nath M, Bhatt D, Prasad R, Tuteja N (2017). Reactive oxygen species (ROS) metabolism and signaling in plant-mycorrhizal association under biotic and abiotic stress conditions. In: Mycorrhiza-Eco-Physiology, Secondary Metabolites, Nanomaterials. Springer pp 223-232. https://doi.org/10.1007/978-3-319-57849-1_12
Orchard TJ (1977). Estimating the parameters of plant seedling emergence. Seed Science and Technology.
Parihar P, Singh S, Singh R, Singh VP, Prasad SM (2015). Effect of salinity stress on plants and its tolerance strategies: a review. Environmental Science and Pollution Research 22(6):4056-4075. https://doi.org/10.1007/s11356-014-3739-1
Shinozaki K, Yamaguchi-Shinozaki K (2007). Gene networks involved in drought stress response and tolerance. Journal of Experimental Botany 58(2):221-227. https://doi.org/10.1093/jxb/erl164
Wang Y, Xu C, Wu M, Chen G (2017). Characterization of photosynthetic performance during reproductive stage in high-yield hybrid rice LYPJ exposed to drought stress probed by chlorophyll a fluorescence transient. Plant Growth Regulation 81(3):489-499. https://doi.org/10.1007/s10725-016-0226-3
Willenborg CJ, Wildeman JC, Miller AK, Rossnagel BG, Shirtliffe SJ (2005). Oat germination characteristics differ among genotypes, seed sizes, and osmotic potentials. Crop Science 45(5):2023-2029. https://doi.org/10.2135/cropsci2004.0722
Zhu J-K (2001). Plant salt tolerance. Trends in Plant Science 6(2):66-71. https://doi.org/10.1016/s1360-1385(00)01838-0
Copyright (c) 2020 Notulae Scientia Biologicae
This work is licensed under a Creative Commons Attribution 4.0 International License.
Distribution - Permissions - Copyright
Papers published in Notulae Scientia Biologicae are Open-Access, distributed under the terms and conditions of the Creative Commons Attribution License.
© Articles by the authors; licensee SHST, Cluj-Napoca, Romania. The journal allows the author(s) to hold the copyright/to retain publishing rights without restriction.
Open Access Journal - the journal offers free, immediate, and unrestricted access to peer-reviewed research and scholarly work, due SHST supports to increase the visibility, accessibility and reputation of the researchers, regardless of geography and their budgets. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, without asking prior permission from the publisher or the author.