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Morpho-physiological and oxidative responses of nitrogen and phosphorus deficiency in wheat (Triticum aestivum L.)

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Title Morpho-physiological and oxidative responses of nitrogen and phosphorus deficiency in wheat (Triticum aestivum L.)
 
Creator Prabha Singh
 
Contributor Sheokand, Sunita
 
Subject Vegetative propagation, Planting, Enzymes, Nitrogen, Genotypes, Wheats, Inorganic compounds, Antioxidants, Proteins, Sowing
 
Description Two wheat genotypes WH1080 and WH1105 were selected to study the morphophysiological and oxidative metabolism under nitrogen (N) and phosphorus (P) deficiency. The plants
were raised hydroponically for 15 and 25 days, using germination paper with seven treatmentsT1(0%N+0%P), T2(0%N+100%P), T3(20%N+100%P), T4(100%N+0%P), T5(100%N+20%P),
T6(20%N+20%P), T7(100%N+100%P). Some morphological parameters such as root length, number
of primary and secondary roots, root biomass, root/ shoot ratio increased, however shoot length, shoot
biomass decreased. WH1105 performed better in terms of root/shoot ratio relatively to WH1080.
Total soluble sugar and total soluble protein content decreased under N and P deficiency in
both the genotypes. Nitrogen deficiency had a more adverse effect as compared to P deficiency.
Membrane injury, lipid peroxidation, and H2O2 content increased with decreasing N and P levels.
Roots were more sensitive to N and P deficiency. WH1105 performed better in terms of membrane
injury and lipid peroxidation levels. The free radical scavenging activity and antioxidant enzymes were
(superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, glutathione reductase) induced
under N and P deficiency. Maximum increase in activity was observed in superoxide dismutase which
recorded a two fold increase followed by catalase, ascorbate peroxidase, glutathione reductase,
peroxidase in both the genotypes.
Overall, it is concluded that wheat genotypes WH1080 and WH1105 respond to N and P
deficiency by increasing root length, root/shoot ratio, number of primary and secondary roots and
antioxidative enzymes (Superoxide dismutase, Catalase, Ascorbate peroxidase, Glutathione reductase).
WH1105 performed better in terms of membrane injury, root/shoot ratio, total soluble sugar, free
radical scavenging activity and antioxidative enzymes.
 
Date 2016-10-10T11:21:20Z
2016-10-10T11:21:20Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80345
 
Language en
 
Format application/pdf
 
Publisher CCSHAU