Computer Science
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20.1975w&link_type=abstract
Advances in Space Research, Volume 20, Issue 10, p. 1975-1978.
Computer Science
Scientific paper
Tomato (Lycopersicon esculentum Mill.) cvs. Red Robin (RR) and Reimann Philipp (RP) were grown hydroponically for 105 d with a 12 h photoperiod, 26 degC/22 degC thermoperiod, and 500 mumol.m^-2 .s^-1 PPF at either 400, 1200, 5000, or 10,000 mumol.mol^-1 (0.04, 0.12, 0.50, 1.00 kPa) CO_2. Harvested fruits were analyzed for proximate composition, total dietary fiber, nitrate, and elemental composition. No trends were apparent with regard to CO_2 effects on proximate composition, with fruit from all treatments and both cultivars averaging 18.9 % protein, 3.6 % fat, 10.2 % ash, and 67.2 % carbohydrate. In comparison, average values for field-grown fruit are 16.6 % protein, 3.8 % fat, 8.1 % ash, and 71.5 % carbohydrate (Duke and Atchely, 1986). Total dietary fiber was highest at 10,000 mumol.mol^-1 (28.4 % and 22.6 % for RR and RP) and lowest at 1000 mumol.mol^-1 (18.2 % and 15.9 % for RR and RP), but showed no overall trend in response to CO_2. Nitrate values ranged from 0.19 % to 0.35 % and showed no trend with regard to CO_2. K, Mg, and P concentrations showed no trend in response to CO_2, but Ca levels increased from 198 and 956 ppm in RR and RP at 400 mumol.mol^-1, to 2537 and 2825 ppm at 10,000 mumol.mol^-1. This increase in Ca caused an increase in fruit Ca/P ratios from 0.07 and 0.37 for RR and RP at 400 mumol.mol^-1 to 0.99 and 1.23 for RR and RP at 10,000 mumol.mol^-1, suggesting that more dietary Ca should be available from high CO_2-grown fruit.
Berry W. L.
Mackowiak C. L.
Stutte G. W.
Wheeler Raymond M.
Yorio N. C.
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