منابع مشابه
Differential Growth and Phototropic Bending in Phycomyces
Using present knowledge of the cell's optical and growth mechanisms, a theoretical bending speed of about 5 degrees min.(-1) is calculated for unilateral irradiation by a single beam of normally incident visible light; this figure is of the magnitude found experimentally. Between beams of light opposed at 180 degrees , the resultant bending speed is given by the difference-to-sum ratio of the l...
متن کاملGrowth rate fluctuations in phycomyces sporangiophores.
The growth rate of the Phycomyces sporangiophore fluctuates under constant environmental conditions. These fluctuations underlie the well-characterized sensory responses to environmental changes. We compared growth fluctuations in sporangiophores of unstimulated wild type and behavioral mutants by use of maximum entropy spectral analysis, a mathematical technique that estimates the frequency an...
متن کاملGrowth and Development of Isolated Phycomyces Sporangiophores.
23. MUNCH-PETERSON, A., KALCKAR, H. M., CUTOLO, C. and SMITH, E. E. B. Uridyl transferases and the formation of uridine triphosphate. Nature 172: 1036-1037. 1953. 24. NAGANNA, B., VENUGOPAL, B. and SRIPATHI, C. E. Occurrence of alkaline pyrophosphatase in vegetable tissues. Biochem. Jour. 60: 224-225. 1955. 25. PUTMAN, E. W. and HASSID, W. Z. Sugar transformation in leaves of Cantna indica. I. ...
متن کاملThe Light Growth Response of Phycomyces
With the help of an automated tracking system we have studied the characteristics of the transient light growth response of Phycomyces. The response shows a sharply defined latency. The Q(10) of the reciprocal latency is 2.4. Response patterns at different peaks of the action spectrum are the same. The gradual variation of response magnitude over a wide range of adapted intensifies parallels th...
متن کاملGrowth Distribution in the Light-growth Response of Phycomyces
Elongation of sporangiophores marked with numerous starch grains was photographically recorded in the steady state and during the light-growth response when the rate is more than doubled. From these records the spatial distribution of growth within the cell's growth zone was derived. Stimulation by a single saturating flash of light speeds growth proportionally in all parts of the growing zone,...
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ژورنال
عنوان ژورنال: Nature
سال: 1937
ISSN: 0028-0836,1476-4687
DOI: 10.1038/140361a0