RECORD: Darwin, C. R. [1878].04.05. Red Cabbage Apogeotropism. CUL-DAR209.11.25. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 7.2023. 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-DAR209.11 contains material for Darwin's book Movement in plants (1880).
[25]
Red Cabbage Apogeotropism of young seedlings with Cots
April 5' to morning of 6th Two seedlings— Right-Hand one same as yesterday.
The vertical glass was turned from light & kept with [illeg] except when observation made— Both ascended till 12° 30' & 1° 30' & then like yesterday circumnutated downwards, & then at right angles or to right & left— very only slight traces of circumnutation.
Apogeotropism acts energetically & very quickly. Even by 12° ie after 4° hypocotyls greatly inclined upwards. N. B In right hand figure the rise before 1° 30 greatly exaggerated because viewed very obliquely.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 19 August, 2023