Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Reexamination Certificate
2000-02-22
2001-08-07
Robinson, Allen J. (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
C504S142000
Reexamination Certificate
active
06271176
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a plant growth promoter. More particularly, the present invention relates to a plant growth promoter applied to root vegetables, potatoes (tuber crops), cereals, fruit vegetables, fruit trees, flowers and ornamental plants, industrial crops, etc.
BACKGROUND ART
Promotion of ordinary growth and development of crops for their increased production has been a big task in the agricultural technology. This task is becoming more important because food shortage on global scale is anticipated in the future.
The method for achieving the task includes a method by a technique employing an agricultural facility capable of controlling the temperature, light, etc. applied. This method, however, has had problems in that the facility and equipment therefor are required and that the method has a limitation as compared to the labor needed for said control.
Meanwhile, there have recently been made attempts of isolating a physiologically active substance from plant tissue samples and studying its effect on the life cycle (germination, growth, blooming, bearing and aging) of plants in order to promote their growth and development for increased production. However, the number of cases is very small yet in which a physiologically active substance having a plus effect on the growth and development of plants has been put into practical use. Moreover, the number of substances is also very small which can exhibit a growth promotion action on plants in their actual outdoor cultivation.
Under the above situation, the present inventors made an extensive study and, as a result, found out that certain jasmonic acid derivatives have a growth promotion action on plants. The finding has led to the completion of the present invention.
DISCLOSURE OF THE INVENTION
According to the present invention there is provided a plant growth promoter comprising, as an active ingredient, a jasmonic acid derivative represented by the following formula:
wherein R
1
represents a pentyl group or a pentenyl group and R
2
represents a hydrogen atom or an alkyl group.
According to the present invention there is also provided a plant growth promoter comprising, as active ingredients, a jasmonic acid derivative and a brassinosteroid.
The jasmonic acid derivative represented by the formula (1), according to the present invention is restricted to those jasmonic acid derivatives wherein R
1
is a pentyl group or a pentenyl group and R
2
is a hydrogen atom or an alkyl group. The pentenyl group is preferably 2-pentenyl group. The alkyl group is exemplified by methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group and decanyl group. R
2
is preferably an alkyl group of 2-6 carbon atoms, particularly preferably an alkyl group of 3 or 4 carbon atoms.
Each of these jasmonic acid derivatives is a known compound and can be produced by an ordinary process. For example, a dihydrojasmonic acid derivative which is a jasmonic acid derivative of formula (1) having a pentyl group as R
1
and an alkyl group of 1-10 carbon atoms as R
2
, can be obtained by subjecting, to Michael addition, 2-pentylcyclopentene-1-one and an alkyl malonate and then subjecting the resulting adduct to decarboxylation.
The content of the jasmonic acid derivative in the plant growth promoter of the present invention cannot be specified in a general range because it varies depending upon the kind of plant to which said promoter is applied, the form, method and timing by and at which said promoter is used, etc. However, when the plant growth promoter is used in the form of a solution and by spraying, said content is controlled in a concentration of generally 0.01-500 ppm, preferably 0.05-300 ppm, more preferably 0.1-200 ppm.
When the concentration is outside the above range, the concentration is not economical; the growth promotion effect of the present promoter is not expressed in some cases; and even the growth inhibition effect is expressed in some cases.
The growth promoter of the present invention comprises a jasmonic acid derivative as an active ingredient and, besides the jasmonic acid derivative, can comprise auxiliary agents ordinarily used, such as carrier, emulsifier, dispersing agent, spreading agent, wetting and spreading agent, sticking agent, disintegrating agent and the like.
The carrier can be exemplified by liquid carriers such as water, alcohol (e.g. ethanol, methanol, isopropanol, butanol, ethylene glycol and propylene glycol), ketone (e.g. acetone, methyl ethyl ketone and cyclohexanone) and ester (e.g. ethyl acetate); and solid carriers such as talc, bentonite, clay, kaolin, diatomaceous earth, vermiculite, slaked lime, siliceous sand, ammonium sulfate, urea and the like.
As the emulsifier or dispersing agent, there is generally used a surfactant such as anionic surfactant (e.g sodium higher alcohol sulfate), cationic surfactant (e.g. stearyltrimethylammonium chloride), nonionic surfactant (e.g. polyoxyethylene alkylphenyl ether) or the like.
There is no particular restriction as to the form in which the present growth promoter is used. The form includes emulsion, suspension, powder, water-dispersible powder, water-soluble powder, granules, paste, aerosol, etc.
The timing and method at and in which the growth promoter of the present invention is used, are not necessarily definite; generally, however, said growth promoter is used, for example, by spraying or coating said growth promoter on a plant in the growth and development stage, or by dipping seeds of a plant in said growth promoter.
The plant growth promoter of the present invention can exhibit an excellent growth promotion effect even when comprising, as the active ingredient, only a jasmonic acid derivative of formula (1), but can exhibit a further superior growth promotion effect when comprising said jasmonic acid derivative in combination with a brassinosteroid.
The brassinosteroid is a group of compounds each known as a plant growth promotion substance and includes, for example, brassinolide, epibrassinolide, homobrassinolide, dolicholide and castasterone. Preferable of these are brassinolide, epibrassinolide and homobrassinolide.
The content of the brassinosteroid in the present plant growth promoter cannot be specified in a general range because it varies depending upon the kind of plant to which said promoter is applied, the form, method and timing by and at which said promoter is used, etc. However, when the plant growth promoter is used in the form of a solution and by spraying, said content is control led in a concentration of generally 0.00001-0.1 ppm, preferably 0.0001-0.05 ppm, more preferably 0.001-0.05 ppm.
In the present invention, a synergistic plant growth promotion effect is obtained by using a brassinosteroid in combination.
Industrial Applicability
The growth promoter of the present invention exhibits a growth promotion action to extensive plants including root vegetables, potatoes (tuber crops), cereals, fruit vegetables, fruit tress, flowers and ornamental plants and industrial crops. Some examples of the plants to which the present growth promoter can be applied, include root vegetables such as radish, carrot, onion, beat and the like; potatoes (tuber crops) such as potato, sweet potato, taro, cassava and the like; cereals such as rice, wheat, barley, oats, German millet, sawa millet, millet, corn, bean and the like; fruit vegetables such as cucumber, Japanese cantaloupe, strawberry, tomato, melon and the like; fruit trees such as citrus tree, apple, grape, peach and the like; flowers and ornamental plants such as lily, tulip, gladiolus, carnation, rose and the like; and industrial crops such as cotton, hemp, turf, stevia and the like. The examples are not restricted thereto. For example, grasses and trees are planted in a desert or a waste land for greening, in some cases; and the present plant growth promoter is applicable even to such grasses and trees.
The site of plant at which the effect of the present growth promoter is expr
Fujisawa Hiroshi
Hirakawa Shin-ichi
Kamuro Yasuo
Nippon Zeon Co Ltd.
Robinson Allen J.
LandOfFree
Plant growth promoter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plant growth promoter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plant growth promoter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2480503