Exogenous Application of Bio-Regulators for Alleviation of Heat Stress in Seedlings of Maize
Journal Title: Open Access Journal of Agricultural Research - Year 2017, Vol 2, Issue 3
Abstract
High temperature is an important environmental stress that influences the growth and development of crop plants thus adversely affecting their production and productivity. An experiment was carried out to investigate the protective role of bioregulators viz., Putrescine (Put), Thiourea (TU) and Hydrogen Peroxide (H2O2) against high temperature stress in maize at early vegetative stage. Maize genotypes earlier identified as heat tolerant (NSJ 221 and NSJ 189) and heat sensitive (RJR 270 and PSRJ 13099) were chosen for the present study. Independent foliar spray of Put (4 mM), TU (20mM) and H2O2 (1.2 mM) was observed to have significant difference (P>0.01) between genotypes, treatments and their interaction when applied 72 hrs prior to heat exposure. High temperature stress led to disruption of cellular membrane by increasing cell membrane injury, lipid peroxidation and H2O2 contents. It led to decrease in total chlorophyll content, soluble proteins, quantum yield and POD activity. Increased SOD activity in heat stressed seedlings was recorded with genotypes NSJ 189 and NSJ 221. Foliar application of Put, TU and H2O2 ameliorated heat-induced damages by stimulating the antioxidant enzyme system through decrease in lipid peroxidation, membrane injury and H2O2 contents in all the genotypes when compared with untreated heat stressed seedlings. Spray with these chemicals resulted in an increase in chlorophyll content, quantum yield and activities of anti-oxidative stress enzymes. Genotypes RJR 270 and PSRJ 13099 recorded improved heat tolerance with spray either of these chemicals by enhancing their biochemical potential. Spray of Put or TU was observed to be more effective of improving heat stress tolerance of maize seedlings
Authors and Affiliations
Yadav SK*, Pavan Kumar D, Tiwari YK, Jainender, Jyothi Lakshmi N, Vanaja M and Maheswari M
Keywords
Related Articles
- EP ID EP747960
- DOI 10.23880/oajar-16000137
- Views 28
- Downloads 0
Factors Affecting the Variability of the Head Department Mass of the Honeybee Apis Mellifera L
We studied the age variability of the head department mass and process modification under the influence of physical and chemical environmental factors. The mass of the head departments is steadily decreasing from the be...
Laboratory Studies on the Effects of Different Salt Concentration on Seed Germination
Salinity is the most severe concern to crop production worldwide causing huge losses to cultivated crops. A laboratory study was carried out to test the effects of salt on seed germination, root and shoot length of rice...
Groundnut Rust (Puccinia arachidis) Management through Integration of Host Resistance with Fungicides at Babile, Eastern Ethiopia
The field experiment was carried out at Babile Research Sub-Station of Haramaya University in 2010 main cropping season to evaluate the efficacy of four fungicides (chlorothalonil a rate of 0.2 kg-ha-1, copper hydroxide...
Use of Nuclear Technique in the Study of the Soil-Plant Transfer Factor
Recent studies have demonstrated the importance of the soil-plant transfer factor in the absorption and translocation of chemical elements, thus, it is possible to evaluate a better decision-making in the consecutive pl...
The Applicability of Genetic Markers Based on Molecules Micro RNA in Agricultural Research
Within our research we are focused on the applicability and exploitation of genomic markers based on microRNA (miRNAs) molecules for purposes of genotyping and genomic activity mapping of miRNA-based markers. The miRNAb...