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A Comparison between Geotropism and Geoelectric Effect in Pisum sativum and Its Mutant ageotropum
Author(s) -
Ekelund Rolf,
Hemberg Torsten
Publication year - 1966
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1966.tb07105.x
Subject(s) - pisum , sativum , auxin , gravitropism , root tip , mutant , elongation , botany , biophysics , lateral root , biology , chemistry , horticulture , biochemistry , arabidopsis , materials science , ultimate tensile strength , metallurgy , gene
The auxin concentration in roots of Pisum sativum ageotropum was examined by three indirect methods:1) Supply of auxin before geotropic stimulation; 2) Lateral placing of the root tip; 3) Inhibiting the auxin transport in half of the root.All the results indicated supraoptimal auxin concentration. When decapitated ageotropum roots were supplied with 1.5 mm long tips from normal Pisum roots their geotropic reactivity was almost restored. The geoelectric potential of stems of Pisum sativum and its mutant ageotropum was measured. In ageotropum stems the geoelectric potential was less and the geotropic reaction appeared later than in the normal stems.