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721-10 Effect of below-Optimum Temperature on Canopy Photosynthesis, Growth, and Forage Quality of Bahiagrass (Paspalum notatum Flueggé).

Poster Number 328

See more from this Division: C02 Crop Physiology and Metabolism
See more from this Session: Abiotic and Biotic Stress Tolerance (Posters)

Wednesday, 8 October 2008
George R. Brown Convention Center, Exhibit Hall E

Vijaya Gopal Kakani, Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, Kenneth Boote, Agronomy Dept., 304 Newell Hall, Univ. of Florida, Gainesville, FL, K. Raja Reddy, Box 9555, Mississippi State Univ., Mississippi State, MS and David Lang, Mississippi State Univ., Mississippi State, MS
Abstract:
An experiment was conducted in sunlit, controlled environment chambers to determine effect of below-optimum temperatures on temporal trends of canopy photosynthesis (Pn), growth and forage qualtiy of ‘Pensacola’ bahiagrass (Paspalum notatum Flueggé). Five day/night temperature of 14/6, 18/10, 22/14, 26/18 and 30/22ºC were imposed from 55 to 100 days after transplanting for plants grown at 30/22ºC. Temporal trends of canopy Pn, ET, LAI and final biomass were reduced by cold temperature. Cold acclimation response of canopy Pn was assessed by lowering growth temperature in all treatments to 6ºC for 3 days from 36 to 38 DATT. Relationships between Canpy Pn, growth and forage quality at below-optimum temperatures will be discussed.

See more from this Division: C02 Crop Physiology and Metabolism
See more from this Session: Abiotic and Biotic Stress Tolerance (Posters)

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