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- Title
Activation of cell proliferation in Arabidopsis root meristem by isoprothiolane.
- Authors
Miyuki KUSAJIMA; Mai INOUE; Moeka FUJITA; Kodai MIYAGAWA; Rina HORITA; Hideo NAKASHITA
- Abstract
A plant growth regulating agent "Fuji-one" has been used to control non-parasitic damping-off (Murenae disease) of rice seedlings. Its active ingredient, isoprothiolane (diisopropyl 1,3-dithiolan-2-ylidenemalonate, IPT), enhances root elongation of rice and Arabidopsis. To understand the mechanisms of IPT's effect on root development, its effect on Arabidopsis root cells was investigated histologically. IPT at a lower concentration (12.5 µg/mL) had no effect on root cell elongation, whereas it enhanced cell division in the root meristem. Histological analysis using phytohormone-related mutants indicated that jasmonic acid and ethylene were involved in the enhanced cell division. In contrast, IPT at a higher concentration (75 µg/mL) suppressed both cell elongation and cell division, in which jasmonic acid and ethylene were not involved. In addition, root hair formation was suppressed by treatment with IPT. These analyses demonstrated that IPT (12.5 µg/mL) enhanced root elongation by activating cell division in a jasmonic acid- and ethylene-dependent manner.
- Subjects
PLANT growth; PLANT hormones; CYTOKININS; CELL proliferation; ARABIDOPSIS thaliana
- Publication
Journal of Pesticide Science, 2018, Vol 43, Issue 4, p261
- ISSN
1348-589X
- Publication type
Article
- DOI
10.1584/jpestics.D18-043