Skip to main content
padlock icon - secure page this page is secure

Estimating photosynthetic light‐use efficiency using the photochemical reflectance index: the effects of short‐term exposure to elevated CO 2 and low temperature

Buy Article:

$61.00 + tax (Refund Policy)

There is growing interest in using the photochemical reflectance index (PRI) to estimate photosynthetic light‐use efficiency (LUE) in studies of terrestrial carbon exchange. However, evidence suggests that the PRI is correlated with LUE only while there is coordinated adjustment between PSII (photosystem II) photochemical efficiency (ΔF/F m ′) and the CO 2 fixation rate. The range of environmental conditions under which this occurs has yet to be fully explored. In this study we examined for 13 species the response of ΔF/F m ′, LUE, and the PRI to short‐term exposure to elevated CO 2 and low temperature. The PRI was linearly correlated with both ΔF/F m ′ and LUE under all conditions. Under elevated CO 2 , LUE was considerably enhanced without significantly affecting either ΔF/F m ′ or the PRI. This is consistent with current mechanistic understanding of the basis of the PRI/LUE relationship. In contrast, ΔF/F m ′, LUE, and the PRI were on average reduced proportionally by low temperature. This suggests simple multiplicative scaling may be sufficient to account across species for the effect of typical diurnal temperature variations in PRI/LUE relationships.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Affiliations: Landcare Research, Private Bag 11052, Palmerston North, New Zealand

Publication date: October 20, 2006

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more