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Evaluation of changes in lipid peroxidation, ROS production, surface structures, secondary metabolites and yield of linseed (<i>Linum usitatissimum</i> L.) under individual and combined stress of ultraviolet-B and ozone using open top chambers

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Title Evaluation of changes in lipid peroxidation, ROS production, surface structures, secondary metabolites and yield of linseed (Linum usitatissimum L.) under individual and combined stress of ultraviolet-B and ozone using open top chambers
 
Creator Tripathi, Ruchika
Agrawal, S B
 
Subject sUV-B
O3
Linum usitatissimum L.
Reactive oxygen species
Secondary metabolite
Growth
Yield
 
Description 318-325
The individual
and interactive effects of supplemental UV-B (sUV-B) (ambient + 7.2 kJ m-2
d-1) and elevated O3
(ambient + 10 ppb) were evaluated under field conditions using open
top chambers on two cultivars, Padmini and T-397 of linseed (Linum
usitatissimum L.). Mean monthly surface level of O3 concentrations
varied from 27.7 ppb to 59.0 ppb during the experimental period. Both UV-B and
O3 induced the production of ROS (H2O2 and O2.-),
resulting in significant damage of membranes due to lipid peroxidation and
electrolyte leakage. Synthesis of secondary metabolites (flavonoids,
anthocyanin, lignin and wax) was also enhanced in all the treatments, whereas
biomass and yield were reduced. Alterations in frequency of stomata and wax
distribution were also observed through scanning electron microscopy (SEM). Cultivar
Padmini was found to be more sensitive because of higher damage of membrane vis-a-vis
reduction in biomass and seed yield. However, concentrations of flavonoids,
anthocyanin, lignin and wax were higher in T-397, suggesting its relative
resistance against applied stress. Combined exposure of sUV-B and O3
was less harmful, as compared to their individual treatment. Among the three
treatments, O3 was found to be more detrimental for overall growth
and sUV-B for economic yield.
 
Date 2013-09-01T13:18:59Z
2013-09-01T13:18:59Z
2013-08
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://hdl.handle.net/123456789/20881
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJBB Vol.50(4) [August 2013]