apheliotropism...Page 449-492


CHAPTER X.

MODIFIED CIRCUMNUTATION: MOVEMENTS EXCITED BY GRAVITATION.

Means of observation--Apogeotropism--Cytisus--Verbena--Beta--Gradual
conversion of the movement of circumnutation into apogeotropism in Rubus,
Lilium, Phalaris, Avena, and Brassica--Apogeotropism retarded by
heliotropism--Effected by the aid of joints or pulvini--Movements of
flower-peduncles of Oxalis--General remarks on apogeotropism--Geotropism--
Movements of radicles--Burying of seed-capsules--Use of process--Trifolium
subterraneum--Arachis--Amphicarpaea--Diageotropism--Conclusion...493-522


CHAPTER XI.

LOCALISED SENSITIVENESS TO GRAVITATION, AND ITS TRANSMITTED EFFECTS.

General considerations--Vicia faba, effects of amputating the tips of the
radicles--Regeneration of the tips--Effects of a short exposure of the tips
to geotropic action and their subsequent amputation--Effects of amputating
the tips obliquely--Effects of cauterising the tips--Effects of grease on
the tips--Pisum
[page x.]
sativum, tips of radicles cauterised transversely, and on their upper and
lower sides--Phaseolus, cauterisation and grease on the tips--Gossypium--
Cucurbita, tips cauterised transversely, and on their upper and lower
sides--Zea, tips cauterised--Concluding remarks and summary of chapter--