TY - JOUR
AU1 - Atkin, O. K.
AU2 - Scheurwater, I.
AU3 - Pons, T. L.
AB - 
• Here, we investigated the impact of temperature on the carbon economy of two Plantago species from contrasting habitats.
• The lowland Plantago major and the alpine Plantago euryphylla were grown hydroponically at three constant temperatures: 13, 20 and 27°C. Rates of photosynthetic CO2 uptake (P) and respiratory CO2 release (R) in shoots and R in roots were measured at the growth temperature using intact plants. At each growth temperature, air temperatures were changed to establish short‐term temperature effects on the ratio of R to P (R/P).
• In both species, R/P was essentially constant in plants grown at 13 and 20°C. However, R/P was substantially greater in 27°C‐grown plants, particularly in P. euryphylla. The increase in R/P at 27°C would have been even greater had biomass allocation to roots not decreased with increasing growth temperature. Short‐term increases in air temperature increased R/P in both species, with the effects of air temperature being most pronounced in 13°C‐grown plants.
• We conclude that temperature‐mediated changes in biomass allocation play an important role in determining whole‐plant R/P values, and, while homeostasis of R/P is achieved across moderate growth temperatures, homeostasis is not maintained when plants are exposed to growth temperatures higher than usually experienced in the natural habitat.


TI - Respiration as a percentage of daily photosynthesis in whole plants is homeostatic at moderate, but not high, growth temperatures
JF - New Phytologist
DO - 10.1111/j.1469-8137.2007.02011.x
DA - 2007-04-01
UR - https://www.deepdyve.com/lp/wiley/respiration-as-a-percentage-of-daily-photosynthesis-in-whole-plants-is-2qsX7flyk0
SP - 367
EP - 380
VL - 174
IS - 2
DP - DeepDyve
ER -