Carbon dioxide interactions with irradiance and temperature in potatoes

Details Carbon dioxide interactions with irradiance and temperature in potatoes Carbon dioxide interactions with irradiance and temperature in potatoes

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994adspr..14..243c&link_type=abstract

Advances in Space Research, Volume 14, Issue 11, p. 243-250.

Computer Science

2

Scientific paper

Separate controlled environment studies were conducted to determine the interaction of CO2 with irradiance and interaction of CO2 with temperature on growth of three potato cultivars. In the first study, an elevated CO2 concentration of 1000 μmol mol-1 and an ambient CO2 of 350 μmol mol-1 were maintained at the photosynthetic photon fluxes (PPF) of 17 and 34 mol m-2 d-1 with 12 h photoperiod, and at the PPF of 34 and 68 mol m-2 d-1 with 24 h photoperiod (400 and 800 μmol m-2 s-1 PPF at each photoperiod). Tuber and total dry weights of 90-day old potatoes were significantly increased with CO2 enrichment, but the CO2 stimulation was less with higher PPF and longer photoperiod. Shoot dry weight was affected more by photoperiod than by PPF and CO2 concentrations. The elevated CO2 concentration increased leaf CO2 assimilation rates and decreased stomatal conductance with 12 h photoperiod, but had only a marginal effect with 24 h photoperiod. In the second study, four CO2 concentrations of 500, 1000, 1500 and 2000 μmol mol-1 were combined with two air temperature regimes of 16 and 20°C under a 12 h photoperiod. At harvest, 35 days after transplanting, tuber and total dry weights of potatoes reached a maximum with 1000 μmol mol-1 CO2 at 16°C, but continued to increase up to 2000 μmol mol-1 CO2 at 20°C. Plant growth was greater at 20°C than at 16°C under all CO2 concentrations. At 16°C specific leaf weight increased substantially with increasing CO2 concentrations as compared to 500 μmol mol-1 CO2, but increased only slightly at 20°C. This suggests a carbohydrate build-up in the leaves at 16°C temperature that reduces plant response to increased CO2 concentrations. The data in the two studies indicate that a PPF of 34 mol m-2 d-1, 20°C temperature, and 1000-2000 μmol mol-1 CO2 produces optimal tuber yield in potatoes.
Current address: MD-RES, Kennedy Space Center, FL 32899.

Affiliated with

Also associated with

No associations

Rating

Carbon dioxide interactions with irradiance and temperature in potatoes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Carbon dioxide interactions with irradiance and temperature in potatoes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbon dioxide interactions with irradiance and temperature in potatoes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1021470