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- W2100054919 abstract "• We report the first investigation of changes in electron partitioning via the alternative respiratory pathway (AP) and alternative oxidase (AOX) protein abundance in field-grown plants and their role in seasonal acclimation of respiration. • We sampled two alpine grasses native to New Zealand, Chionochloa rubra and Chionochloa pallens, from field sites of different altitudes, over 1 yr and also intensively over a 2-wk period. • In both species, respiration acclimated to seasonal changes in temperature through changes in basal capacity (R10) but not temperature sensitivity (E0). In C. pallens, acclimation of respiration may be associated with a higher AOX : cytochrome c oxidase (COX) protein abundance ratio. Oxygen isotope discrimination (D), which reflects relative changes in AP electron partitioning, correlated positively with daily integrated photosynthetically active radiation (PAR) in both species over seasonal timescales. Respiratory parameters, the AOX : COX protein ratio and D were stable over a 2-wk period, during which significant temperature changes were experienced in the field. • We conclude that respiration in Chionochloa spp. acclimates strongly to seasonal, but not to short-term, temperature variation. Alternative oxidase appears to be involved in the plant response to both seasonal changes in temperature and daily changes in light, highlighting the complexity of the function of AOX in the field." @default.
- W2100054919 created "2016-06-24" @default.
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- W2100054919 date "2010-12-03" @default.
- W2100054919 modified "2023-10-06" @default.
- W2100054919 title "Leaf respiration and alternative oxidase in field‐grown alpine grasses respond to natural changes in temperature and light" @default.
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- W2100054919 doi "https://doi.org/10.1111/j.1469-8137.2010.03557.x" @default.
- W2100054919 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21128944" @default.
- W2100054919 hasPublicationYear "2010" @default.
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