| 释义 |
ˌphotorespiˈration Bot.
[f. photo- 1 + respiration.]
A respiratory process in many higher plants by which they take up oxygen in the light and given out some carbon dioxide, contrary to the general pattern of photosynthesis.
1945E. I. Rabinowitch Photosynthesis I. xx. 569 We now come to the problem of ‘photorespiration’ proper, that is, a direct photochemical acceleration of normal respiration which disappears in the dark as instantaneously as does photosynthesis. Ibid. 570 None of the experiments described above provides a final proof of the nonexistence of true ‘photorespiration’. 1966Physiologia Plantarum XIX. 732 Evolution of carbon dioxide in light, or photorespiration, was affected by oxygen... Oxygen had no effect on dark respiration. This discrepancy..can best be explained by an assumption that photorespiration and dark respiration are two different processes. 1972[see peroxisomal a.]. 1977I. M. Campbell Energy & Atmosphere iv. 76 Plants with high rates of photorespiration such as wheat.
Hence photoreˈspire v. intr., to carry out photorespiration; photoreˈspired ppl. a., evolved by photorespiration; photoreˈspiring ppl. a.; photoreˈspiratory a., of, pertaining to, or evolved by photorespiration.
1968Plant Physiol. XLIII. 1840/1 Glycolate oxidation appears to be responsible for much of the photorespiratory CO2. Ibid. 1843/2 At high concentrations of CO2 the synthesis of the photorespiratory substrate, glycolate, is severely inhibited. 1969Proc. Nat. Acad. Sci. LXIII. 668 Species of the first group also photorespire, evolving CO2 into the atmosphere in light. 1970Nature 14 Nov. 687/2 Such plants may not photorespire, or alternatively may be capable of refixing all the photorespired CO2 by an unusually efficient photosynthetic mechanism. Ibid. 688/1 Glycollate seems to be the primary substrate for photorespiration, and it does not normally accumulate in photorespiring tissue. 1974H. Fock et al. in Bull. R. Soc. N.Z. XII. 235 (heading) Estimation of carbon fluxes through photosynthetic and photorespiratory pathways. Ibid. 237 At 400 ppm CO2 most or all of the photorespired carbon dioxide from intact leaves..may be derived from 14C-labelled early products of photosynthesis. |