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Growth, biomass production, and assimilatory characters in Cenchrus ciliaris L. Under elevated CO2 condition

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Photosynthetica

Abstract

The effect of elevated carbon dioxide (600±50 cm3 m−3; C600) on growth performance, biomass production, and photosynthesis of Cenchrus ciliaris L. cv. 3108 was studied. This crop responded significantly by plant height, leaf length and width, and biomass production under C600. Leaf area index increased triple fold in the crops grown in the open top chamber with C600. The biomass production in term of fresh and dry biomass accumulation increased by 134.35 (fresh) and 193.34 (dry) % over the control (C360) condition where the crops were grown for 20 d. The rate of photosynthesis and stomatal conductance increased by 24.51 and 46.33 %, respectively, in C600 over C360 plants. In comparison with C360, the rate of transpiration decreased by 6.8 % under C600. Long-term exposure (120 d) to C600 enhanced photosynthetic water use efficiency by 34 %. Also the contents of chlorophylls a and b significantly increased in C600. Thus C. ciliaris grown in C600 throughout the crop season may produce more fodder in terms of green biomass.

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Authors and Affiliations

  1. Indian Grassland and Fodder Research Institute, Jhansi, 284003 (U.P.), India

    R. K. Bhatt, M. J. Baig & H. S. Tiwari

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  1. R. K. Bhatt
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  2. M. J. Baig
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  3. H. S. Tiwari
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Bhatt, R.K., Baig, M.J. & Tiwari, H.S. Growth, biomass production, and assimilatory characters in Cenchrus ciliaris L. Under elevated CO2 condition. Photosynthetica 45, 296–298 (2007). https://doi.org/10.1007/s11099-007-0048-7

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  • DOI: https://doi.org/10.1007/s11099-007-0048-7

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