The physiology of photosynthesis / by Sir Jagadis Chunder Bose.

  • Jagadish Chandra Bose
Date:
1924
Catalogue details

Licence: In copyright

Credit: The physiology of photosynthesis / by Sir Jagadis Chunder Bose. Source: Wellcome Collection.

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    Hence activity for S at temperature 290 C. is— Theoretically (1) X (4) X activity at 210 for 0-4 S = 2*5 X 2-67 X 88-5 = 590-7 c.mm. 0 Observed value — 585-0 ,, The agreement between the theoretical and the observed results is again most remarkable. V. Three Variables : C02-Concentration, Light, and Temperature In this set of experiments all these three different factors underwent variation ; the different combinations were : clt; Clt; CL^; CLT. la) c= 3 ; l= 750 lux; t = 210 activity = 50-4c.mm. O (&) C = 7*5; l = 750 „ t= 210 „ = 83-4 (c) 0 = 7-5;L= 1500 „ t = 210 ,, =163-8 (d) C = 7-5; L= 1500 „ T = 26-6° ,, =245-4 From (a) and (b) the partial factor for C02-concentration is : Activity at C02-concentration 7 • 5 _ 83 • 4 _ ^ ^ Activity at C02-concentration 3-0 50-4 From (b) and (c) the partial factor for light is— Activity at 1500 lux _ 163 ■ 8 _ ^ Activity at 750 lux 83-4 (1) (2) As regards the factor for temperature-variation, it has been previously shown that the physiological zero varies between 90 • 2 and 90 - 8. In the present case it is 90 • 6. At 'p 9*6 Xt~ t- 9-6 Hence the partial factor for temperature variation from 210 to 26°-6— 26-6 — 9-6 21-0 — 9-6 (3) From the above, the enhancement of activity from c, l, t, to C, L, T, is—
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