Heat Tolerance Screening Studies and Evaluating Salicylic Acid Efficacy against High Temperature in Rice (Oryza sativa L.) Genotypes

• DOI: 10.35248/2329-9029.19.7.235
• Publication Date: 2019-10-17T08:20:25Z
• Authors: Akasha A; Ashraf M; Shereen A; Mahboob W; Faisal S
• Keywords: 0301 basic medicine; 2. Zero hunger; 03 medical and health sciences

High temperature retards plant growth and development. Major objective of this study was to assess heat tolerant potencies forty rice cultivars at seedling stage check the effectiveness salicylic acid (SA) in improving thermo-tolerance. Rice seeds were sown plastic bowls containing sand stress (45°C) applied on 15- days old seedlings for 12 24 h incubators. Growth related tolerance indices used as screening tools. Among all, two sensitive (Rambir DM 15-1) (RP2 DM1-30-15-04) selected SA studies. spray (100 mg L-1) 15-days imposed 19-days h. (root shoot lengths fresh dry biomasses) biochemical attributes (nitrate nitrite reductase, total soluble sugars, proteins, nitrogen, potassium, phosphorous magnesium) measured. Heat shock reduced growth, enzymatic activities mineral contents. However, enhanced biomass, concentration organic inorganic solutes all genotypes under stress. improved thermo-tolerance RP2 DM1-30-15-04 genotypes. These have capability give better stand establishment.