Document Detail


Synergistic action of tropospheric ozone and carbon dioxide on yield and nutritional quality of Indian mustard (Brassica juncea (L.) Czern.).
MedLine Citation:
PMID:  23283603     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Field experiments were conducted in open top chamber during rabi seasons of 2009-10 and 2010-11 at the research farm of the Indian Agricultural Research Institute, New Delhi to study the effect of tropospheric ozone (O(3)) and carbon dioxide (CO(2)) interaction on yield and nutritional quality of Indian mustard (Brassica juncea (L.) Czern.). Mustard plants were grown from emergence to maturity under different treatments: charcoal-filtered air (CF, 80-85 % less O(3) than ambient O(3) and ambient CO(2)), nonfiltered air (NF, 5-10 % less O(3) than ambient O(3) and ambient CO(2) ), nonfiltered air with elevated carbon dioxide (NF + CO(2), NF air and 550 ± 50 ppm CO(2)), elevated ozone (EO, NF air and 25-35 ppb elevated O(3)), elevated ozone along with elevated carbon dioxide (EO + CO(2), NF air, 25-35 ppb O(3) and 550 ± 50 ppm CO(2)), and ambient chamber less control (AC, ambient O(3) and CO(2)). Elevated O(3) exposure led to reduced photosynthesis and leaf area index resulting in decreased seed yield of mustard. Elevated ozone significantly decreased the oil and micronutrient content in mustard. Thirteen to 17 ppm hour O(3) exposure (accumulated over threshold of 40 ppm, AOT 40) reduced the oil content by 18-20 %. Elevated CO(2) (500 ± 50 ppm) along with EO was able to counter the decline in oil content in the seed, and it increased by 11 to 13 % over EO alone. Elevated CO(2), however, decreased protein, calcium, zinc, iron, magnesium, and sulfur content in seed as compared to the nonfiltered control, whereas removal of O(3) from air in the charcoal-filtered treatment resulted in a significant increase in the same.
Authors:
Satyavan Singh; Arti Bhatia; Ritu Tomer; Vinod Kumar; B Singh; S D Singh
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-3
Journal Detail:
Title:  Environmental monitoring and assessment     Volume:  -     ISSN:  1573-2959     ISO Abbreviation:  Environ Monit Assess     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508350     Medline TA:  Environ Monit Assess     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Centre for Environment Science and Climate Resilient Agriculture, Indian Agricultural Research Institute, New Delhi, 110 012, India.
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