RECORD: Darwin, C. R. 1879.05.04. Phaseolus long radicles with half in water, perpendicularly down. CUL-DAR209.6.14. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 12.2022. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR209.6 contains materials for Darwin's book Movement in plants (1880).

Notes for Movement in plants. Text F1325.


[14]

May 4th 1879 8° 15' Phaseolus long radicles with half in water, perpendicularly down.

7 touched with Caustic & 7 without any

These beans had germinated being stuck perpendicularly in it in sawdust & their radicles had grown perpendicularly down parallel to one edge of the bean, but now (May 5th 8th 7° 45' a.m) they have all without exception in their basal parts have diverged from the bean, & therefore Sachs' curvature give a diametrically opposite movement in this case comparative to that of common bean. After this divergence of the basal & therefore whole radicle, the tips of most of those which had not been cauterised, had grown vertically downwards, whereas those with minute black tips had not so grown. — The points of position of the petioles of Coty: with hypocotyl are different in Bean & Phaseolus, & in each case the side of radicle, which one wd have thought wd have been best supplied with nutriment & wd consequently wd have grown quickest & caused curvature seems the less well supplied.—

These observations on Phaseolus, show at least that a movement, viz Sachs curvature is not in the least interfered with by caustic on tip.


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 16 January, 2023