RECORD: Darwin, C. R. [1881].08.20. Aggregation / Cucurbita ovifera. CUL-DAR62.62. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 5.2023. 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-DAR62 contains for Darwin's papers 'The action of carbonate of ammonia on the roots of certain plants', 1882, F1800 and 'The action of carbonate of ammonia on chlorophyll-bodies', 1882, F1801.
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Aggregation
Cucurbita ovifera — Short lateral cut off roots (seeds pinned to cork lid of jar) left in C. of am. 2 to 1000, after 2 hr. exhibited no plain aggregate; but some way above root-cap, there were minute granules within many cells & these were now collected into groups. After 24 hr no greater or anyhow plain effect— So that roots of young seedlings are not affected
Aug. 20' Lateral rootlets, germinated in damp air after 24 hr. in sol. of C. of ammonia of 4 to 1000 show no distinct sign of aggregation. There are granules in cells almost all the cells, probably aggregation, but not special lines of vessels with conspicuous
[aggregation].
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 22 July, 2023