photosyntheticadj.

1897 Science 26 Feb. 362/2 The photosynthetic system is reduced to guard against excessive transpiration which would otherwise take place at high altitudes.

1900 A. J. Ewart tr. W. Pfeffer Physiol. Plants I. vii. 293 The photosynthetic assimilation in the chloroplastid only provides the organic food, which in green and non-green plants, and in animals also, has the same function to perform.

1913 W. F. Ganong Living Plant ii. 27 The photosynthetic sugar and starch which appear in lighted green leaves.

1962 Listener 3 May 768/2 Some scientists believe that free oxygen is entirely biological in origin and that it arose after the emergence of photosynthetic life.

1974 A. J. Huxley Plant & Planet iii. 22 It was probably not the seaweeds that gave rise to land plants but, from their similar photosynthetic pigments and photosynthetic mechanism, the green algae.

1992 N.Y. Times 5 May c1/2 People..have appropriated to their own use about 40 percent of the photosynthetic energy produced by plants.

1926 H. A. Spoehr Photosynthesis ii. 92 The photosynthetic quotient may yield some information relative to the first product formed in photosynthesis.

1945 E. I. Rabinowitch Photosynthesis I. iii. 31 The ‘photosynthetic quotient’, Q_p : Q_p = ΔO₂/−Δ/CO₂. (The term ‘photosynthetic quotient’ has been used by many authors..to designate the inverse ratio, −ΔCO₂/ΔO₂; this difference calls for care in the quotation of numerical results.)

1971 I. Zelitch Photosynthesis v. 129 At the high O₂ concentrations, Amaranthus leaves had a photosynthetic quotient of 0·50 and bean leaves 0·33.

1996 Science (Nexis) 19 July 364 The observed photosynthetic quotient is expected if CO₂ is reduced not only to the level of sugars.

1931 E. C. Miller Plant Physiol. viii. 431 The determination of the photosynthetic ratio is difficult, because the process of respiration is proceeding at the same time and in the opposite direction [to that of photosynthesis].

1958 Science 2 May 1029/3 Reaction 3 would thus account for the well-known photosynthetic ratio..also observed with isolated chloroplasts..when CO₂ is assimilated to the level of carbohydrate.

1987 UNESCO Courier (Nexis) Mar. 17 With specially developed fluorescent lamps, the photosynthetic ratio is said to be better than that of the sun.

1898 Science 4 Feb. 148/1 The green cell performs that added function of photosynthetically recombining the elements of simple unassimilable compounds into assimilable organic compounds.

1923 Bot. Gaz. 75 351 Although they contain some chlorophyll, they do not function photosynthetically.

1990 EMBO Jrnl. 9 3013/1 Probably the best understood photosynthetically active complex is the photosynthetic reaction centre of the purple bacterium Rhodopseudomonas viridis.