Vol. 7, Issue 3 (2019)
Responses of oat (Avena sativa L.) genotypes under salt stress
Author(s): S Devi, DS Phogat, Satpal and V Goyal
Abstract: One of the main menaces to agriculture is the adverse environmental conditions that threaten plant growth and development. Salt stress is one of the major threats to agriculture. The experiment was conducted under screen house conditions in CCS Haryana Agricultural University, Hisar to evaluate the responses of ten oat genotypes under different levels of salt stress. The main physiological parameters studied were dry weight (g), relative water content (RWC %), osmotic potential (-bars), total chlorophyll content (mg g-1), chlorophyll stability index (CSI %) and assimilation rate (µmol CO2 m-2s-1) under different salt stress (5 and 10 dS m-1). Genotypes were grown under screen house conditions by maintaining desired levels of salt stress. Observations were recorded at 50% flowering. Dry weight (g) decreased with increasing levels of salt i.e. from control to 10 dS m-1 and values ranged from 10.81 to 4.54. Maximum dry weight (g) plant-1 was noticed in HJ-8 (6.20) followed by HFO 716 (5.37), HFO 529 (5.30) and minimum in HFO 607 (2.93) at 10 dS m-1 of salinity. Similar trend was noticed in relative water content (RWC %). Highest RWC was observed in HFO 114 (66.29) followed by OS 377 (65.71), HJ-8 (61.21) and least in HFO 607 (51.36) at 10 dSm-1 of salinity. Osmotic potential (Ψs) values become more negative and values ranged from 11.05 to 17.29 from control to 10 dS m-1 of salinity. Declining trend was also noticed in total chlorophyll content (mg g-1) with the increasing levels of salinity (control to 10 d Sm-1) of salinity. Maximum chlorophyll content was observed in OS 377 (0.85) followed by OS 6 (0.80), HJ-8 (0.79) genotypes at 10 dS m-1 of salinity. Similar trend was observed for chlorophyll stability index (CSI) and photosynthetic rate (µmol CO2 m-2s-1). Highest assimilation rate was found in OS 377 (4.87) followed by HJ-8 (4.43), OS 405 (4.36) genotypes at 10 dS m-1 of salinity. Overall, based on the above parameters two genotypes (OS 377 and HJ-8) performed better than others. Based on the above results these genotypes can be used in breeding programme for the development of agronomically important oat genotype that could perform under salt stress.
Pages: 734-737 | 414 Views 96 Downloads
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How to cite this article:
S Devi, DS Phogat, Satpal, V Goyal. Responses of oat (Avena sativa L.) genotypes under salt stress. Int J Chem Stud 2019;7(3):734-737.
