The response of leaf respiration to water stress in Nothofagus species
作者： C Sanhueza , L Bascunan-Godoy , LJ Corcuera , MH Turnbull
DOI: 10.1080/0028825X.2012.759600
关键词: Photosynthesis 、 Respiration 、 Botany 、 Nothofagus 、 Fractionation 、 Water stress 、 Biology 、 Alternative oxidase 、 Irrigation 、 Metabolism
摘要: Abstract Nothofagus solandri is regarded as more tolerant to drought than menziesii in the field. However, physiology of responses water limitation these species not well understood. In this study, thermal sensitivity leaf respiration and its underlying metabolism response were investigated mature trees saplings. Respiration (R d) photosynthesis (A max) measured during drying re-wetting cycles. addition, respiratory pathway changes evaluated by oxygen isotope fractionation protein analyses. Under treatment glasshouse, both showed similar photosynthetic performance, but under mild stress N. was able increase A max. moderate deficit (around −2 MPa), increased at a base temperature 10°C 10) then decreased it initial values after re-watering. menziesii, R 10 did respond significantly water-stress treatment. The sensitivi...
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