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CJlf 14 Jtcll 2 ~ 2006 '!. 186-191

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Responses of plants to the rising concentration ofatmospheric carbon dioxide : An analysis

DC Upreti, D C Sexena, Neeta Dwivedi, Anupam Raj, Ganesh Paswan, Ranjan Dass & SujathaNational Fellow Project, Division of Plant Physiology

Indian Agricultural Research Institute, New Delhi 110012and

S C Garg, H K Maini & A P MitraNational Physical Laboratory, New Delhi 110012

AbstractThe impact of rising concentration of atmospheric CO2 on the productivity of crop plants was studied using OpenTop Chamber (OTC) and Free Air CO2 Enrichment (FACE) technologies, established under National Fellow Projectat Indian Agricultural Research Institute, New Delhi. These investigations led to the establishment of South AsianCO2 research network of Bangladesh, Nepal, Sri Lanka, Pakistan and India to study the effect of elevated level ofCO2 on the productivity of cereals, pulses and oil seeds. Indian studies revealed that elevated CO2 significantlyameliorated the effect of adverse drought stress in Brassica species. It also demonstrated the possibility of transfer-ring CO2 responsive characters in Brassica hybrids. The data generated from these investigations may possibly helpin developing plant type and identifying a suitable crop management system for future high CO2 environment.

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GENETIC TRANSFER

B. oxyrrhina x B. campestris

2n =18 '00' ~ 2n=20 'AA'

B.oxycamp2n =38 '00' 'AA'

Introgression of CO2

responsivecharacters inB.oxycamp

Interspecific hybrid

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