Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Patent
1998-11-30
2000-08-08
Clardy, S. Mark
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
A01N 4316, A01N 4320
Patent
active
061002194
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a plant growth promoter and in particular to plant growth stimulation of vegetables, root crops, potatoes, fruit vegetables, fruits, grains, flowers and grasses, and crops for special uses, etc. The growth promotion refers to growth of leaves and roots, promotion of flowering, promotion of thickening of potatoes and fruits, and increase in the quantity of fruit.
BACKGROUND ART
A major problem in agricultural technology is the improvement and stabilization of production. For this purpose, many plant growth promoters have already been developed. However, the effects of conventional promoters are limited, and the need remains for an agent that more efficiently causes stable effects For example, gibberellin is a plant hormone and is applied as a plant growth promoter to a large number of crops, yet is limited in effect as well as in the range of applicable crops.
It is also known that combinations of gibberellin and natural abscisic acid, are possible to promote plant growth such as promotion of thickening and growth of crops, promotion of elongation of cedars, promotion of flowering etc. However, the concentration of each chemical necessary to yield an effect is high, so development of more superior plant growth promoters has been desired (Japanese Laid-Open Patent Publication No. 139912/1993; Japanese Laid-Open Patent Publication No. 172110/1994; Gifu University, Local Joint Research Center, Report No. 5, pp. 81-86, May 1995).
DISCLOSURE OF THE INVENTION
The present invention provides a plant growth promoter comprising an epoxycylohexane derivative represented by the general formula: ##STR2## (wherein R.sup.1 represents a hydrogen atom, C1 to C6 alkyl groups or C3 to C6 cycloalkyl groups, and R.sup.2 and R.sup.3 are independently lower alkyl groups or are combined to form a polymethylene group which may be substituted with an alkyl group) and gibberellin as active ingredients.
BEST MODE FOR CARRYING OUT THE INVENTION
The C1 to C6 alkyl groups represented by R.sup.1 in the general formula (1) include a methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, s-butyl group, t-butyl group, pentyl group, isopentyl group, hexyl group, s-hexyl group etc. Among these, C2 to C4 groups are preferable for physiological action, and particularly a propyl group or isopropyl group are preferable.
The C3 to C6 cycloalkyl groups represented by R.sup.1 in the general formula (1) include a cyclopropyl group, cyclobutyl group, cyclopentyl group and cyclohexyl group.
The lower alkyl groups represented by R.sup.2, R.sup.3 in the general formula (1) are preferably C1 to C4 straight-chain alkyl groups, specifically methyl group, ethyl group, propyl group and butyl group. The polymethylene group which may be substituted with an alkyl group include C2 to C6 groups, specifically ethylene group, propylene group, trimethylene group etc. Among these, the ethylene group is preferable for its high activity and easy synthesis.
In general, the epoxycyclohexane derivative of the general formula (1) used in the present invention is obtained in the following manner: ##STR3## wherein R.sup.1' represents C1 to C6 alkyl groups or C3 to C6 cycloalkyl groups, and R.sup.2 and R.sup.3 have the same meaning as defined above.
The starting material, epoxycyclohexane carbaldehyde (3) can be synthesized by a method described in the literature (see for example, Helv. Chim. Acta, 71, 931 (1988)). Conversion of Compound (3) into the carboxylic acid of the general formula (1a) can be carried out according to the method described in Japanese Laid-Open Patent Publication No. 184966/1991. Further, Compound (1a) can be synthesized wherein R.sup.1 is a methyl group by allowing diazomethane to act on (1a) as described in Japanese Patent Laid-Open Patent Publication No. 184966/1991. In general, the ester compounds represented by general formula (1) can be obtained, for example, by esterification of the carboxylic acid (1a), using e.g. a method of reacting it with a corresponding
REFERENCES:
patent: 5518995 (1996-05-01), Abrams et al.
Sakai, K., et al; Convenient Synthesis of Optically Active Abscisic Acid and Xanthoxin, Tetrahedron, vol. 48, No. 38 pp. 8229-8238 (1992).
Kamuro Yasuo
Kuriyama Hiroki
Sakai Kunikazu
Bal Planning Co., Ltd.
Clardy S. Mark
Sagami Chemical Research Center
Tama Biochemical Co. Ltd.
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