JP3764195B2 - Freshness retaining composition for cut flowers containing gibberellin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composition for maintaining freshness of cut flowers having a synergistically enhanced action by mixing at least two components.
[0002]
[Prior art]
The causes of the decline in the freshness of cut flowers include stem rot in raw water, blockage of conduits, nutrient depletion, and an increase in endogenous ethylene. For rot of stem and blockage of tuber, bactericides such as 8-hydroxyquinoline, aluminum sulfate for precipitating underwater filth, and various surfactants for improving landing are used, and nutrient depletion is used. In contrast, sugars such as sucrose are used. However, the effect varies and is not clear. On the other hand, STS (Ag (S ₂ O ₃ ) ₂ ^3- ) [Planta 140 , 93-96, 1978] discovered by Veen et al. Is known to suppress the action of ethylene and show a clear effect on cut flowers in which ethylene, such as carnation and perennial gypsophila, is the main cause of flower wilt.
[0003]
Today, producers use STS for many cut flowers. However, since STS contains silver, which is a heavy metal, as an active ingredient, there is a concern about environmental pollution, and the practical application of a safe freshness-preserving agent that does not contain heavy metal is desired.
[0004]
Formula (I)
[Chemical 2]
[Wherein R ¹ represents a linear or branched lower alkyl group having 3 to 4 carbon atoms, or a halogen atom, a C _1-4 alkyl group, a hydroxyl group, an alkoxyl group, a carboxyl group, an alkoxycarbonyl group. Represents a phenyl group which may be substituted by a group, a nitro group, an amino group or a benzyloxy group, or represents a pyridyl group, or R ¹ represents a thienyl group which may be substituted by a carboxyl group or an alkoxycarbonyl group. , R ² and R ³ are each a hydrogen atom, a C _1-4 alkyl group, an alkoxalyl group, an alkoxyalkyl group, or a formula —C (═X) —X—R ⁴ (wherein X represents an oxygen atom or a sulfur atom) , R ⁴ is an alkoxycarbonyl group or an alkylthio represented by represents a C _1-4 alkyl group) - or represents a thiocarbonyl group, or R ² Contact Fine R ³ is heterocycle of R ² and R ³ taken together with the nitrogen atom to which are attached 4-5 carbon atoms, for example may form a morpholino group or a piperidino group, or R ² and R ³ bond A sulfonyl semicarbazide represented by the formula —N═CR ⁵ (R ⁶ ) (wherein R ⁵ and R ⁶ each represent a C _1-4 alkyl group) It has been discovered by the present inventors that the derivative or a salt thereof is effective as a freshness-preserving agent for cut flowers (WO95 / 05326). On the other hand, gibberellin (abbreviated as GA) is also known to have an effect of maintaining the freshness of cut flowers [Journal of Plant Physiology 139 , 484-488, 1992]. However, the effect of mixing the sulfonyl semicarbazide derivative represented by the general formula (I) with gibberellin has not been studied.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a freshness-preserving agent having an excellent effect on cut flowers.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above object, the inventors of the present invention maintain the freshness by mixing the sulfonyl semicarbazide derivative represented by the general formula (I) or a salt thereof with gibberellin as compared with each single treatment. The inventors have found that the effect is synergistically enhanced and have reached the present invention.
[0007]
That is, the present invention relates to a freshness maintaining composition for cut flowers, which contains a sulfonyl semicarbazide derivative represented by the general formula (I) or a salt thereof and gibberellin as active ingredients. Examples of the salt of the sulfonyl semicarbazide derivative represented by the general formula (I) include sodium salt, potassium salt, ammonium salt, ethanolamine salt, and isopropylamine salt. Examples of gibberellins include, but are not limited to, GA ₁ , GA ₃ , GA ₇ , GA ₁₂ , GA _{14 and the} like.
[0008]
These active ingredients are used as aqueous solutions of various concentrations, and the concentration is not particularly limited because the optimum value varies depending on the type of cut flower to be targeted. The sulfonyl semicarbazide derivative represented by the general formula (I) or a salt thereof is used in a concentration range of 1 × 10 ^{−4 to} 0.1 wt%, and preferably in a concentration range of 1 × 10 ^{−4 to} 0.001 wt%. Gibberellin is used in a concentration range of 1 × 10 ^{−5 to} 0.01 wt%, preferably in a concentration range of 1 × 10 ⁻⁵ to 1 × 10 ⁻⁴ wt%. The mixing ratio in the composition is sulfonyl semicarbazide derivative: gibberellin = 1: 0.001 to 10, preferably sulfonyl semicarbazide derivative: gibberellin = 1: 0.01-1.
[0009]
Examples of the method of using the freshness-keeping agent composition of the present invention include pre-treatment, post-treatment, and spraying onto plants. As a pretreatment method, the cut end of the cut flower may be immersed in a chemical solution for 1 to 24 hours. As a post-treatment method, the cut flowers may be placed in a vase containing a chemical solution. As a spraying method, a chemical solution may be sprayed over the entire cut flower by spraying or the like.
[0010]
The freshness-keeping agent composition of the present invention may be used by mixing with additives (bactericides, surfactants, etc.) and other commercially available freshness-keeping agents. Or other commercially available freshness-preserving agents may be used.
[0011]
Examples of the flowers to which the freshness-keeping agent of the present invention can be applied include cut flowers such as carnation, delphinium, sweet pea, perennial gypsophila, lily, freesia, tulip, orchid or potted plants.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The sulfonyl semicarbazide derivative represented by the general formula (I) or a salt thereof and gibberellin used as an active ingredient of the present invention are used as an aqueous solution. The concentration is not particularly limited because the optimum value varies depending on the type of cut flower to be processed. For example, as a sulfonyl semicarbazide derivative, 1,1-dimethyl-4- (phenylsulfonyl) semicarbazide has a concentration range of 1 × 10 ^{−4 to} 0.001 wt%, and as gibberellin, GA ₃ has a concentration of 1 × 10 ⁻⁵ to 1 Used in a concentration range of × 10 ^-4 wt%. The mixing ratio in the composition is sulfonyl semicarbazide derivative: gibberellin = 1: 0.001 to 10, preferably sulfonyl semicarbazide derivative: gibberellin = 1: 0.01-1.
[0013]
Examples of the method for using the freshness-keeping agent composition of the present invention include a pretreatment method, a posttreatment method, and a spraying treatment method. In the pretreatment method, a cut flower cut end is immersed in a chemical solution for 1 to 24 hours before use. In the post-treatment method, when a cut flower is laid in a vase or the like, a chemical solution is put in the vase and used. In the spraying method, a chemical solution is sprayed over the entire cut flower and used.
[0014]
The freshness-keeping agent composition of the present invention can be used by mixing with additives (bactericides, surfactants, etc.) and other commercially available freshness-keeping agents. It can also be used after being used in combination with additives and other commercially available freshness-preserving agents.
[0015]
The freshness-keeping agent of the present invention can be applied to cut flowers such as carnation, delphinium, sweet pea, perennial gypsophila, lily, freesia, tulip, orchid, or pots.
【Example】
Test Example 1 Effect of keeping freshness of carnation cut flowers Carnation (variety: Francisco) cultivated in a farmer in Chino City, Kanagawa Prefecture was cut into a length of 10 cm and put into a tube bottle (φ3 × 12 cm) containing 50 ml of chemical solution. The cut flowers were put one by one, and then the state of the cut flowers was observed in a temperature-controlled room with an air temperature of 25 to 28 ° C., a humidity of 50 to 60%, and an illuminance of 1000 to 2000 lux. Each test section was repeated 5 times. The results are shown in Table 1. The number of days until flower wilt is observed is expressed as the number of days with flower, and the number of days with flower extension when compared with the control plot (water only) and the number of days with flower extension with each treatment are also shown. It was. In addition, flower extension days and additional days are defined as follows.
Extended flower duration = Number of flower days in each treatment group-Number of days in control group added to flower life = Number of days extended in flower treatment for each concentration of sulfonyl semicarbazide derivative treatment group + Length of flower extension in each treatment group gibberellin treatment group 【 0016
[Table 1]
[0017]
As is clear from Table 1, the effect of mixing 1,1-dimethyl-4- (phenylsulfonyl) semicarbazide and GA ₃ is more than the addition of the number of extended flower life of each single use. Indicated.
[0018]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the freshness maintenance agent which keeps the freshness of a cut flower in a favorable state for a long term can be provided.

Claims (6)

Formula (I)
[Wherein R ¹ represents a linear or branched lower alkyl group having 3 to 4 carbon atoms, or a halogen atom, a C _1-4 alkyl group, a hydroxyl group, an alkoxyl group, a carboxyl group, an alkoxycarbonyl group. Represents a phenyl group which may be substituted by a group, a nitro group, an amino group or a benzyloxy group, or represents a pyridyl group, or R ¹ represents a thienyl group which may be substituted by a carboxyl group or an alkoxycarbonyl group. , R ² and R ³ are each a hydrogen atom, a C _1-4 alkyl group, an alkoxalyl group, an alkoxyalkyl group, or a formula —C (═X) —X—R ⁴ (wherein X represents an oxygen atom or a sulfur atom) , R ⁴ is an alkoxycarbonyl group or an alkylthio represented by represents a C _1-4 alkyl group) - or represents a thiocarbonyl group, or R ² Contact Fine R ³ is the formula together with the nitrogen atom may be taken together with the nitrogen atom to which they are bonded is R ² and R ³ form a heterocyclic ring of 4-5 carbon atoms, the or R ² and R ³ are attached A sulfonyl semicarbazide derivative represented by the formula: —N═CR ⁵ (R ⁶ ) (wherein R ⁵ and R ⁶ each represent a C _1-4 alkyl group) or a salt thereof, A freshness-keeping composition for cut flowers, comprising one kind of gibberellin as an active ingredient. The freshness-keeping composition for cut flowers according to claim 1, wherein the sulfonyl semicarbazide derivative is 1,1-dimethyl-4- (phenylsulfonyl) semicarbazide. Gibberellin, claim 1 freshness keeping agent composition cut flowers wherein the gibberellin A _3. Gibberellin, claim 2 freshness keeping agent composition cut flowers wherein the gibberellin A _3. The freshness-preserving agent composition for cut flowers according to claims 1 to 4, wherein the mixing ratio of the sulfonyl semicarbazide derivative or salt thereof and gibberellin is sulfonyl semicarbazide derivative or salt thereof: gibberellin = 1: 0.001-10. The freshness-preserving agent composition for cut flowers according to claims 1-4, wherein the mixing ratio of the sulfonyl semicarbazide derivative or salt thereof and gibberellin is sulfonyl semicarbazide derivative or salt thereof: gibberellin = 1: 0.01-1.