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Effect of triazinone on root growth and gravireaction
Author(s) -
Ogawa Masami,
Pilet PaulEmile
Publication year - 1983
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.1399-3054.1983.tb00721.x
Subject(s) - elongation , darkness , incubation , chemistry , stereochemistry , growth inhibition , botany , horticulture , biology , biochemistry , in vitro , materials science , ultimate tensile strength , metallurgy
The effects of a synthetic growth promoter, 4‐ethoxy‐l‐( p ‐tolyl)‐S‐triazine‐2,6 (1H, 3H)‐dione [TA], on growth and gravireaction of Zea mays L. (cv. LG 11) roots were investigated. In horizontal, intact roots, pretreatment with TA at 4 × 10 −4 M inhibited the gravireaction. If the pretreated roots were rinsed with a buffer solution before incubation, the TA effect was reduced, indicating that a continuous presence of TA was necessary for its maximal activity. On the other hand, the TA pretreatment (1×10 −5 , 1×10 −4 and 4 × 10 −4 M ) promoted the elongation of these roots. The TA effect was stronger for illuminated roots than for those kept in darkness. TA also decreased the lateral curvature of half‐decapitated roots maintained vertically in light. This indicates that the action of TA could be associated with some growth inhibiting substances produced or released in cap cells.