Asymmetric “Acid Growth” Response following Gravistimulus
A number of workers have noted that treatment with CO2, or with acid buffers at approximately the pH of CO2-saturated water, can bring about a remarkable promotion of extension growth or water uptake (see Evans, Ray and Reinhold 1971 for refs.). Some years ago Zvi Glinka and I (1966) were rather awed to observe that only extremely brief exposure was necessary to obtain the effect — promotion of water uptake by sunflower hypocotyl segments was easily observable after 10 sees, treatment with CO2. More recently Michael Evans, Peter Ray and I (1971) made a detailed study of CO2-induced growth and found, among other things, that within 1 min of the start of treatment the rate of elongation of coleoptiles rises 8–16 fold.
KeywordsDioxide Depression Glycine Arsenite Cycloheximide
Unable to display preview. Download preview PDF.
- ANKER, L. (1956). The auxin concentration rule for the geotropism of Avena coleoptiles. Acta bot. néerl. 5, 335–341.Google Scholar
- BENNET-CLARK, T.A., A. F. YOUNIS and R. ESNAULT (1959). Geotropic behaviour of roots, J. Exp. Bot. 10., 69–86.Google Scholar
- GUNDEL, W. (1933). Chemische und physikalische Vorgänge bei geischer Induktion, Jb. wiss. Bot. 78, 623–664.Google Scholar
- MATZNER, P. (1934). Zur Kenntnis der Stoffwechseländerungen bei geotropisch gereizten Keimpflanzen, Ber. dtsch. Bot. Ges. 52, 506–522.Google Scholar