We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Acclimation of leaf respiratory properties in Alocasia odora following reciprocal transfers of plants between high- and low-light environments.
- Authors
Noguchi, K.; Nakajima, N.; Terashima, I.
- Abstract
AbstractAcclimation of respiration to the light environments is important for a plant’s carbon balance. Respiratory rates of mature leaves of Alocasia odora, a typical shade-tolerant species, were measured during the night for 14 d after reciprocal transfers between high- (330 µ mol m-2 s-1) and low-light (20 µ mol m-2 s-1) environments. Following the transfer, both the rate of CO2 efflux and that of O2 uptake of A. odora leaves adjusted to the new light environments. The O2-uptake rates changed more slowly than the CO2-efflux rates under the new environments. Leaf mass per area also changed after the transfer. We analysed whether substrate availability or ATP-consumption rates influence the respiratory acclimation. Since the addition of sucrose to leaf segments did not influence the O2-uptake rates, the change of respiratory substrate availability was not responsible for the respiratory acclimation. The addition of an uncoupler induced increases in the O2-uptake rates, and the degree of enhancement significantly decreased after the transfer from low to high irradiance. Thus, the change in ATP-consumption rates was responsible for the changes in respiratory rates in the plants transferred from low to high light. Potential rates of O2 uptake, as measured in the presence of both the substrate and the uncoupler, changed after the transfer, and strongly correlated with the O2-uptake rates, irrespective of the directions of transfer (r = 0·961). There was a strong correlation between maximal activities of NAD-isocitrate dehydrogenase and the potential rates of O2 uptake (r = 0·933), but a weaker correlation between those of cytochrome c oxidase and the potential rates (r = 0·689). These data indicate that the changes of light environments altered the respiratory rates via the change of the...
- Subjects
ACCLIMATIZATION (Plants); LEAF physiology; ADENOSINE triphosphate
- Publication
Plant, Cell & Environment, 2001, Vol 24, Issue 8, p831
- ISSN
0140-7791
- Publication type
Article
- DOI
10.1046/j.1365-3040.2001.00728.x