The Power of Movement in Plants

Darwin, Francis, Sir, 1848-1925;Darwin, Charles, 1809-1882

English

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Below is a summary of The Power of Movement in Plants







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[page i.]

THE

POWER OF MOVEMENT

IN

PLANTS.

[page ii.]

[page iii.]



THE

POWER OF MOVEMENT

IN

PLANTS.



BY CHARLES DARWIN, LL.D., F.R.S.



ASSISTED BY

FRANCIS DARWIN.




[page iv.]

[page v.]



CONTENTS.

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INTRODUCTION...Page 1-9.

CHAPTER I.

THE CIRCUMNUTATING MOVEMENTS OF SEEDLING PLANTS.

Brassica oleracea, circumnutation of the radicle, of the arched hypocotyl
whilst still buried beneath the ground, whilst rising above the ground and
straightening itself, and when erect--Circumnutation of the cotyledons--
Rate of movement--Analogous observations on various organs in species of
Githago, Gossypium, Oxalis, Tropaeolum, Citrus, Aesculus, of several
Leguminous and Cucurbitaceous genera, Opuntia, Helianthus, Primula,
Cyclamen, Stapelia, Cerinthe, Nolana, Solanum, Beta, Ricinus, Quercus,
Corylus, Pinus, Cycas, Canna, Allium, Asparagus, Phalaris, Zea, Avena,
Nephrodium, and Selaginella...10-66


CHAPTER II.

GENERAL CONSIDERATIONS ON THE MOVEMENTS AND GROWTH OF SEEDLING PLANTS.

Generality of the circumnutating movement--Radicles, their circumnutation
of service--Manner in which they penetrate the ground--Manner in which
hypocotyls and other organs break through the ground by being arched--
Singular manner of germination in Megarrhiza, etc.--Abortion of cotyledons-
-Circumnutation of hypocotyls and epicotyls whilst still buried and arched-
-Their power of straightening themselves--Bursting of the seed-coats--
Inherited effect of the arching process in hypo-
[page vi.]
gean hypocotyls--Circumnutation of hypocotyls and epicotyls when erect--
Circumnutation of cotyledons--Pulvini or joints of cotyledons, duration of
their activity, rudimentary in Oxalis corniculata, their development--
Sensitiveness of cotyledons to light and consequent disturbance of their
periodic movements--Sensitiveness of cotyledons to contact...Page 67-128


CHAPTER III.

SENSITIVENESS OF THE APEX OF THE RADICLE TO CONTACT AND TO OTHER IRRITANTS.

Manner in which radicles bend when they encounter an obstacle in the soil--
Vicia faba, tips of radicles highly sensitive to contact and other
irritants--Effects of too high a temperature--Power of discriminating