The action of drugs on plants / by J.C. Bose.

  • Jagadish Chandra Bose
Date:
[1914?]
Catalogue details

Licence: In copyright

Credit: The action of drugs on plants / by J.C. Bose. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    of relief when fresh air is introduced. Only in the presence of sunlight is this effect modified by photosynthesis. In contrast to the effect of carbonic acid, ozone renders the plant highly excitable. Sulphuretted hydrogen, even in small quantities, is fatal to the plant. Chloroform acts as a strong narcotic, inducing a rapid abolition of excitability. The ludicrously unsteady gait of the response of the plant (fig. 16) under alcohol could be effectively exploited in a temperance lecture ! The record (fig. 17) is in the nature of an anticlimax, where the plant has drunk (pure water !) not wisely but too well. The gorged plant is seen to have lost all power of movement. I was, however, able to restore the plant to normal condition by extracting the excess of liquid by application of glycerin. Fig. 15. Effect of carbonic acid gas. (VIII) Effect of Deugs on the Conducting Neeve. I have already described how the variation of conducting power in Mimosa is obtained from the automatic records of velocity of trans- mission of excitation. The arrival of excitation here is signalled by the sudden fall of the leaf. Investigation by method of mechanical response is possible in the case of the so-called sensitive plants. For ordinary plants the motile indicator is not available and an electrical method, to be presently described, has to be employed in such a case.
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