: Life Movements in Plants Volume I by Bose Jagadis Chandra - Plants Irritability and movements; Growth (Plants)

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RESPONSE OF PLANT ORGANS.

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Complexity of the problem--Effects of different forms of stimuli--Diverse responses under identical stimulus--Modification of response determined by intensity and point of application of stimulus, and tonic condition of organ--Response of pulvinated and growing organs--Necessity for shortening the period of experiment 1

Apparatus for study of variation of excitability--Uniform periodic stimulation--The Response Recorder--Effects of external condition on excitability--Effects of light and darkness--Effect of excessive turgor--Influence of temperature--Diurnal variation of excitability--Effect of physiological inertia 43

Effect of wound or section in modification of normal excitability--The change of excitability after immersion in water--Quantitative determination of the rate of decay of excitability in an isolated preparation--Effect of amputation of upper half of the pulvinus--Effect of removal of the lower half--Influence of weight of leaf on rapidity of responsive fall--The action of chemical agents--Effect of "fatigue" on response--The action of light and darkness on excitability 73

Conduction of excitation--Dual character of the transmitted impulse--Effect of distance of application of stimulus--Periods of transmission of positive and negative impulses--Effects of Direct and Indirect stimulus 135

Theory of assimilation and dissimilation--Unmasking of positive effect--Modification of response under artificial depression of tonic condition--Positive response in sub-tonic specimen 141

GROWTH AND ITS RESPONSIVE VARIATIONS.

Method of high magnification--Automatic record of the rate of growth--Determination of the absolute rate of growth--Stationary method of record--Moving plate method--Precaution against physical disturbance--Determination of latent period and time-relations of response--Advantages of the Crescograph--Magnetic amplification--The Demonstration Crescograph 151

Method of discontinuous observation--Method of continuous observation--Determination of the cardinal points of growth--The Thermocrescent curve--Relation between temperature and growth 173

Effect of stimulants--Effect of anaesthetics--Action of different gases--Action of poisons 183

Response to positive variation of turgor--Method of irrigation--Effect of artificial increase of internal hydrostatic pressure--Response to negative variation of turgor--Method of plasmolysis--Effect of alternative variations of turgor on growth--Response of motile and growing organs to variation of turgor--Effect of external tension 188

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