The rhythm of carbon dioxide output in Bryophyllum leaves was entrained on exposure to 0.25 h of white light every 24 h. Entrainment also occurred on similar exposure to monochromatic radiation in spectral bands centred at 660 nm and, to a lesser extent, at 730 nm, but a band centred at 450 nm was w
A rapid circadian rhythm of carbon-dioxide metabolism inBryophyllum fedtschenkoi
โ Scribed by Malcolm B. Wilkins
- Publisher
- Springer-Verlag
- Year
- 1984
- Tongue
- English
- Weight
- 441 KB
- Volume
- 161
- Category
- Article
- ISSN
- 0032-0935
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## Detached leaves of Bryophyllum fedtschenkoi Hamet et Perrier kept in normal air show a single period of net CO2 fixation on transfer to constant darkness at temperatures in the range 0-25 ~ The duration of this initial fixation period is largely independent of temperature in the range 5-20 ~ bu
Detached shoots of iBryophyllum ]edtschenkoi maintained in a closed system in the light exhibited an endogenous circadian rhythm in CO 2 compensation. The rhythm was sensitive to changes in light intensity and temperature. At 15~ it damped rapidly in light of 78 J m -2 s -1, but at 10~ a rhythm of c
The role of the epidermis in the generation of the endogenous circadian rhythm of CO2 exchange in leaves of Bryophyllum fedtschenkoi has been examined. At 25ยฐ C the rhythm of CO2 output exhibited by whole leaves kept in continuous darkness and an initially CO2-free air stream also occurs in isolated