WO2004064521A1 - Agent de controle des maladies des plantes, et procede de controle des maladies des plantes au moyen de cet agent - Google Patents

Agent de controle des maladies des plantes, et procede de controle des maladies des plantes au moyen de cet agent Download PDF

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Publication number
WO2004064521A1
WO2004064521A1 PCT/JP2004/000217 JP2004000217W WO2004064521A1 WO 2004064521 A1 WO2004064521 A1 WO 2004064521A1 JP 2004000217 W JP2004000217 W JP 2004000217W WO 2004064521 A1 WO2004064521 A1 WO 2004064521A1
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Prior art keywords
acid
plant
bile acids
plant disease
controlling
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PCT/JP2004/000217
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English (en)
Japanese (ja)
Inventor
Jinichiro Koga
Kenji Umemura
Shigeki Tanino
Hidetoshi Kubota
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Meiji Seika Kaisha Ltd.
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Publication of WO2004064521A1 publication Critical patent/WO2004064521A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N45/00—Biocides, pest repellants or attractants, or plant growth regulators, containing compounds having three or more carbocyclic rings condensed among themselves, at least one ring not being a six-membered ring

Definitions

  • the present invention relates to a plant disease controlling agent containing bile acids, having a low environmental load, and safe for users and consumers, and a method for controlling plant diseases using the controlling agent.
  • Methods for controlling disease on agricultural crops include controlling pesticides by directly acting on phytopathogenic bacteria such as fungicides, and controlling crop diseases by increasing the disease resistance of the plants themselves (resistance-inducing pesticides). ) Is used.
  • pesticides that are allowed to label organic agricultural products for the purpose of inducing plant disease resistance are limited to probenazole and benzobenzolaru S-methyl, which are registered as rice blast control agents. These pesticides for the purpose of inducing disease resistance do not act directly on plant pathogens, but show various crop disease control effects by inducing plant resistance. No emergence of resistant mutants has been reported. However, they are all chemically synthesized pesticides, and it is considered preferable to avoid excessive dependence on the environment and other factors.
  • natural product-derived disease resistance inducers include polysaccharide degradation products (see, for example, JP-A-5-331016) and celeb mouthsides (see, for example, Japanese Patent No. 2846610). Publications, International Publication No.
  • bile acids are known to have various effects on animals, but very little is known about the effects on microorganisms and plants.
  • bile acids especially deoxycholic acid.
  • cholic acid, chenodeoxycholic acid, deoxycholic acid, and lithocholic acid at a concentration of 0.4% or more have a fungal effect on Candida yeast (for example, Refer to the official gazette of Japanese Patent Application Publication No. 4_7 8 6 16).
  • bile acids which are substances originally derived from vertebrates, induce disease resistance in rice. I discovered that. That is, it has been discovered that treatment with the substance induces phytoalexin (phytosan), an antibacterial substance, a lytic enzyme; 6-1,3-dalcanase, to rice.
  • phytoalexin phytoalexin
  • 6-1,3-dalcanase a lytic enzyme
  • the present inventors have also found that by treating plants such as rice, tomato, and lettuce with bile acids before the onset of the disease, a control effect on the disease can be obtained. Furthermore, bile acids were found to have a high control effect at surprisingly low concentrations of 1-20 O mg ZL.
  • the present invention has been made based on the above findings, and provides a plant disease controlling agent comprising one or more selected from bile acids and derivatives thereof.
  • the present invention also provides the bile acids, wherein the bile acids are cholic acid, arocholic acid, chenodeoxycholic acid, lithocholic acid, deoxycholic acid, hyocholic acid, muricholic acid, hydoxycholic acid, ursodeoxycholic acid, taurocholic acid, glycochol. Acid, tauroglycocholic acid, taurochenedoxycholic acid, taurodeoxycholic acid, taurolithocholic acid, glycochenodeoxycholic acid, glycodoxycholic acid, glycolicocholic acid, oxolitocolic acid, and the like
  • the above-mentioned plant disease controlling agent comprising one or more selected from salts of the above.
  • the present invention also provides the plant disease controlling agent, wherein the concentration of the bile acid or a derivative thereof is 0.1 to 100 mg / L as applied to a plant.
  • the present invention also provides use of one or more selected from bile acids and derivatives thereof in the production of a plant disease controlling agent.
  • the present invention also provides a method for controlling plant diseases, comprising a step of treating a cultivated plant with the plant disease controlling agent.
  • the present invention further provides a method for controlling plant diseases, which comprises inducing disease resistance in the plant by treating the cultivated plant with the plant disease controlling agent.
  • bile acids have been found to contain fungi and filaments at very high concentrations,> 4 g ZL. It is known that it has antibacterial activity against fungi. Indeed, also in the present invention, an extremely high bile acid concentration of 5 g / L or more showed an effect of suppressing the growth of pathogenic bacteria.
  • an extremely high bile acid concentration of 5 g / L or more showed an effect of suppressing the growth of pathogenic bacteria.
  • by treating rice with bile acids at a concentration 25 to 500 times lower than the concentration at which bile acids exhibit antibacterial activity against pathogenic bacteria, before the onset of the disease It is surprising that there is no finding that it has a controlling effect on pathogens.
  • bile acids refer to bile acids, bile salts, conjugated bile acids, and conjugated bile salts, and refer to all bile acids contained in vertebrates such as mammals, birds, and fish.
  • a conjugated bile acid refers to one in which taurine, glycine, or the like is conjugated to the carboxyl group of the bile acid.
  • Specific examples of these bile acids include, for example, cholic acid, arocholic acid, chenodeoxycholic acid, lithocholic acid, deoxycholic acid, hoocholic acid, muricholic acid, hydroxycholic acid, and ursodeoxycholic acid.
  • Bile acids are mainly produced in the liver of higher animals, are stored in the gall bladder, are excreted in the intestine, and are known to help the intestinal absorption by emulsifying fat and activating lipase. Have been.
  • bile acids are primary bile acids synthesized directly in the liver, such as cholic acid and chenodeoxycholic acid, which are dehydrated by intestinal bacteria and are exposed to secondary acids such as lithocholic acid and deoxycholic acid. It becomes the next bile acid.
  • carboxyl groups of these bile acids are conjugated to lindaridicin. Conjugated bile acids are the major components. These bile acids are synthesized in large amounts in the body and are stored like bile, so they are extremely safe for humans, and at the same time, can be easily prepared as natural materials from livestock animals, etc. It is possible.
  • the bile acids are preferably prepared from natural materials, but can be used even if they are chemically synthesized.
  • the derivative of bile acids refers to those synthesized artificially or in the natural world using bile acids as starting materials, such as esterified products, hydroxides, and dehydrated oxides of bile acids.
  • a plant disease resistance inducing activity that is equal to or less than the starting material.
  • the plant disease resistance-inducing activity can be measured from the phytoalexin-inducing ability of rice according to the method described in Example 1.
  • the bile acids and their derivatives can be used alone or in a mixture of two or more.
  • the dosage form of the plant disease control agent, its use form and application method are not particularly limited, but it is preferably liquid when applied.
  • the plant disease controlling agent of the present invention may be any one which can dissolve or dilute in a solvent at the time of use, so that bile acids or their derivatives can be formed into a suitable concentration and in a form suitable for application.
  • the content of bile acids or their derivatives is not particularly limited.
  • the preferred application concentration of the pesticide is bile acids or plant bile acids at the time of application. Is 0.1 to 100 mg / L, more preferably 1 to 100 mg ZL, particularly preferably:! ⁇ 200 mg / L. However, it is preferable to adjust the application concentration to an appropriate concentration according to the type of plant, the growth stage, and the application method.
  • the plant disease controlling agent of the present invention can be prepared by mixing bile acids or their derivatives with an appropriate additive, and preparing a liquid, powder, granule, emulsion, wettable powder, oil, aerosol, flowable, etc. It may be used for. Further, if desired, the pH can be adjusted by adding a buffer or the like, and a surfactant or the like can be added to improve the permeability and spreadability to plants.
  • the method for controlling plant diseases of the present invention includes a step of treating a cultivated plant with the plant disease controlling agent.
  • disease resistance is induced in the plant by treating the cultivated plant with the plant disease controlling agent.
  • Examples of the method of treating a cultivated plant with the plant disease controlling agent of the present invention include spraying or applying to a plant, immersing in a root, and mixing with soil.
  • the method for controlling plant diseases of the present invention is aimed at preventing disease, it is preferable to use the method before the time when the disease occurs.
  • the above object does not mean that the plant disease controlling agent of the present invention does not have an action of promoting disease healing after the disease has occurred.
  • the crops which can be targeted by the plant disease controlling agent of the present invention include all cultivated plants, for example, grasses (rice, corn, wheat, corn, junpa, etc.), solanaceous plants (tomato, eggplant, potato, etc.) ), Periphytes (e.g., cucumber, melon, kabochiya), legumes (e.g., endu, soybean, pingen bean, alfalfa, laccasei, faba bean), cruciferous plants (e.g.
  • radish, Chinese cabbage, beetle, etc. Family plants (strawberry, apple, pear, etc.), croaker (crop, etc.), aoaceae (crop, etc.), apiaceae (carrot, parsley, celery, etc.), asteraceae (burdock, sunflower, chrysanthemum, lettuce, etc.) , Grape family (such as grapes) and so on.
  • preferable ones include grasses, solanaceous plants, and asteraceous plants, and particularly preferable ones include rice, tomato, and lettuce.
  • the general disease resistance response of plants is non-specific to pathogenic bacteria
  • the target diseases of the above crops include all plant diseases caused by fungi, bacteria and viruses.
  • rice blast fungus Magnaporthe grisea
  • rice sesame leaf blight fungus Cochl iobolus miyabeanus
  • shakaimo powdery power disease fungus
  • Spongospora subterranea disease fungus
  • jakai fungus jakai fungus
  • diazbe ica sporamana Sp. Hordei Kom Sentonko; (Eryshiphe graminis f.
  • Sp. Me Ion is, Fusarium oxysporum f. Sp. Lact ucae, and Tomato Tribium Sp. Lycopersici), Fusarium oxysporum f. Sp. Spinaciae, Vert ici 11 iua dahliae, Plasmodiophora brassicae ae), Pythium debaryanum, strawberry gray mold, Botrytys cinerea, Colleiotrichwn phomoides, Pseudomonas syringae pv. syringae)
  • Example 1 Induction of phytoalexin by bile acids in rice
  • Sprout seeds of rice (variety: Akitakomachi) were sown in paddy rice cultivation and cultivated in a glass cultivation case installed in a climate chamber.
  • the climate chamber was set for a cycle consisting of 12 hours at 22 ° C, 30, OOOLux and 12 hours at 18 ° C / 0Lux.
  • 20 samples (2 L per spot) were placed on 10 surfaces of the 4-leaf leaf.
  • the sample (bile acids) was dissolved in a 0.1% Tween 20, 20 mM potassium phosphate buffer (pH 6.0) solution, but the insoluble bile acids were dissolved by adding an appropriate amount of ethanol. I let it.
  • the quantification of phytocasans was determined according to the method of Koga et al. (Koga J. et al., Tetrahedron, 1995, 51, .7907-7918; Koga J. et al., Phytochemistry, 1997, 44, 249-253). Performed by analysis. That is, a TSKgel®DS-120T column (4.6 mm d. X 30 cm; manufactured by Tosoh Corporation) was used under the conditions of 45% acetonitrile, a flow rate of 1.2 mLZmin, and a column temperature of 50 ° C. The sample was poured, and the peaks of phytokasan A and phytokasan B were detected at UV 280 nm.
  • Huaitosan A and B were isolated and purified from rice according to the method of Koga et al., And the amount of Huaitokasan A and Huaitokasan B induced per rice leaf was repeated 5 times. It was calculated as the average value of the reversion test.
  • Sprout seeds of rice (variety: Akitakomachi) were sown on paddy rice cultivation soil and cultivated in a glass cultivation case installed in a climate chamber.
  • the climate chamber was set to cycle at 1 day at 22 ° C / 25, 12 hours at OOOLux and 12 hours at 18 / 0Lux.
  • a 20 L sample (2 L per location) was placed at 10 locations on the surface of the true leaf at the age of 4 leaves.
  • the cholate supplemented group was prepared by dissolving sodium cholate at a concentration of 20 Omg / L in a 0.1% Tween 20, 20 mM potassium phosphate buffer (pH 6.0) solution.
  • curdlan 1% of curdlan (curdlan), put an enzyme solution 0. 2 mL to 5 0 mM N a 2 HP_ ⁇ 4 _ Kuen acid buffer one (PH 5. 0), as a solution of total volume 2 mL, 3 7 X: Shaking reaction was performed for 60 minutes. The amount of reducing sugars generated in the reaction solution was measured by the DNS method (Mi Her GL et al., Anal. Chem., 1959, 31, 426-428) and determined as ⁇ -1,3-dulcanase activity. . The activity unit is defined as 1 U, the amount of enzyme that produces 1 / mo 1 of glucose-reducing sugar per minute, and is induced per leaf; 3-1, 3-dalcanase activity is 5 units. It was determined as the average of repeated tests.
  • Table 2 shows the results. J3_l, 3-Dulcanase, a kind of PR protein (pathogenesis-related proteins), is induced as a bacteriolytic enzyme and is known to be one of the disease resistance of plants. These results clearly show that cholic acid, one of the bile acids, has an activity of inducing rice] 3-1,3-glucanase.
  • Example 3 Effect of Bile Acid Spraying on Infection Control of Rice Blast Fungus
  • Sprout seeds of rice (variety: Akitakomachi) were sown in paddy rice cultivation and cultivated in a glass cultivation case installed in a climate chamber.
  • the climate chamber was set to cycle at 1 day at 22 ° C / 25, 12 hours at OOOLux, and 12 hours at 18 ⁇ 0 LuX.
  • the setting of the climate chamber is 12 hours at 22 ° C / 20, OOOLux, and 12 hours at 18 ° C / 0Lux Changed to cycle conditions.
  • Control value (1 average number of lesions per leaf in each section Z average number of lesions per leaf in control section) X 100 The results are shown in Table 3. From Table 3, it was found that spraying bile acids at a very low concentration of 1 to 20 Omg_L was effective in controlling rice blast fungus.
  • Example 4 Bile acid suppresses germination of rice blast fungus.
  • Conidia of rice blast fungus (scientific name: Magnaporthe grisea race 07 strain) were converted to 0.05% Tween 20%, 4 mM potassium phosphate buffer ( ⁇ H7), and various concentrations of cholic acid. The mixture was suspended and mixed in a solution of Na and incubated at 28 ° C. for 16 hours. Then, the number of spores that had germinated and the number of spores that had not germinated were counted, and the spore germination rate of the blast fungus was determined. The spore germination rate of the blast fungus was calculated by the following formula, and calculated as an average value of five repeated tests.
  • Sprout seeds of rice (variety: Akitakomachi) were sown in paddy rice cultivation and cultivated in a glass cultivation case installed in a climate chamber.
  • the climate chamber was set for a cycle consisting of 22 hours at 22 ° CZ25, 12 hours at OOOLux, and 12 hours at 18 ° C / 0 Lux.
  • the setting of the climate chamber is set at 22 ° C / 20, OOOh lux for 12 hours, and 18 ⁇ / 0 lux for 12 hours. Changed to conditions.
  • Control value (1 average number of lesions per leaf in each section Z average number of lesions per leaf in section without addition of cholic acid) X 100
  • Table 5 The results are shown in Table 5. As is clear from the results, it was found that under the above conditions, even if cholic acid was sprayed immediately before infection with the rice blast fungus, there was no infection control effect in the concentration range of 1 to 200 OmgZL. On the other hand, as shown in Example 3, spraying bile acids two days before infection with the blast fungus, even at a concentration as low as 1 to 200 mg / L, has an effect of controlling infection. It was found that bile acids, not the activity, induced the resistance to the plant by inducing resistance to the plant. Table 5
  • Sprout seeds of rice (variety: Akitakomachi) were sown on paddy rice cultivation soil and cultivated in a glass cultivation case installed in a climate chamber. Artificial weather room is 22 ° C / 2 a day 5.
  • the cycle condition was set to consist of 12 hours with OOOLux and 12 hours with 180Lux.
  • the setting of the climate chamber is changed to the condition of 222 hours, 12 hours at OOOLux, and 12 hours at 18 ° CZ 0Lux. did.
  • the true leaf at the age of 5 leaves expanded to 10% to 20% the rice plants were immersed together with the pots in solutions containing various concentrations of cholate Na to allow bile acids to be absorbed from the roots.
  • infection treatment was carried out by spraying and inoculating a conidia spore suspension of the rice blast fungus (scientific name: MagnaporiAe grisea race 007). After the spray inoculation, the blast fungus was infected by leaving for 36 hours in the dark and in a humidified condition. After that, the plants were transferred to the artificial weather chamber and cultivated, and the control value was calculated by measuring the number of diseased lesions on the fourth true leaf of each section 6 days after inoculation. 200 rice plants were infected in each zone, and the control value was calculated by the following formula.
  • Control value (1—average number of lesions per leaf in each section / average number of lesions per leaf in section without cholate) X 100 The results are shown in Table 6. As is clear from Table 6, the bile acids at a very low concentration of 5 to 5 OmgZL have an effect of controlling rice blast infection not only by spraying but also by immersion. Table 6
  • Example 7 Control effect of bile acid on lettuce root rot
  • Seedlings of lettuce (cultivar: Patriot) in which three true leaves have been developed are immersed in a solution containing various concentrations (10, 5 Omg / L) of cholic acid Na for 24 hours to remove bile acids from the roots.
  • lettuce root rot fungus (Fusarium oxysporum f. Sp. Laciucae race SB 1-1) contaminated soil (dilution plate method to determine bacterial density was 2 X 10 3 C FUZg soil) ) was transplanted for infection treatment.
  • Control value (average disease incidence in control plots-average disease incidence in test plots) / (average disease incidence in control plots) X 100 The results are shown in Table 7. As is evident from Table 7, it was found that immersion treatment of bile acids at a very low concentration of 10 to 5 Omg / L was effective in controlling lettuce root rot infection.
  • Example 8 Effect of controlling bile acid on tomato wilt
  • Tomato seedlings (cultivar: Ponterosa) with two true leaves developed are immersed in a solution containing various concentrations (10, 5 Omg / L) of colic acid Na for 72 hours to remove bile acids from the roots. After being absorbed from the soil, the bacterial infection of tomato wilt (Fi / sarii / ffl oxysporuffl ⁇ ⁇ sp. Lycopersic i race J_l) is transferred to a contaminated soil of 5 ⁇ 10 4 C FUZg soil for infection treatment. went.
  • Control value (average disease incidence in control plot-average disease incidence in test plot) / (average disease incidence in control plot) X 100
  • Table 8 As is evident from Table 8, it was found that the immersion treatment of bile acids at a very low concentration of 10 to 5 Omg / L was effective in controlling the infection of tomato wilt fungi.
  • the present invention relates to a plant disease controlling agent comprising a bile acid or a derivative thereof, which has a low environmental load, and exhibits a high controlling effect against a disease of a cultivated plant by applying the controlling agent.
  • a plant disease controlling agent comprising a bile acid or a derivative thereof, which has a low environmental load, and exhibits a high controlling effect against a disease of a cultivated plant by applying the controlling agent.

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  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

En traitant une plante cultivée par un agent de contrôle des maladies des plantes contenant des acides biliaires ou des dérivés de ceux-ci, la résistance aux maladies est induite, empêchant ainsi toute infection par des micro-organismes pathogènes.
PCT/JP2004/000217 2003-01-17 2004-01-15 Agent de controle des maladies des plantes, et procede de controle des maladies des plantes au moyen de cet agent WO2004064521A1 (fr)

Applications Claiming Priority (2)

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JP2003009270A JP2006219372A (ja) 2003-01-17 2003-01-17 植物病害防除剤およびその剤を用いた植物病害防除法
JP2003-009270 2003-01-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009088074A1 (fr) 2008-01-11 2009-07-16 Ajinomoto Co., Inc. Agent améliorant la résistance à la maladie pour des plantes et procédé de lutte contre une maladie de plante à l'aide de celui-ci
EP2524597B1 (fr) 2010-01-13 2016-03-16 Ajinomoto Co., Inc. Agent de potentialisation de résistance aux maladies de plante de la famille des cucurbitacées et procédé de lutte contre maladie de plante utilisant celui-ci

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10236909A (ja) * 1997-02-27 1998-09-08 Hiroshi Kawai 稲いもち病の予防方法及び稲いもち病予防用組成物
WO1998047364A1 (fr) * 1997-04-21 1998-10-29 Plant Biological Defense System Laboratories Procede de selection d'un eliciteur induisant la production de phytoalexine dans le riz et agent de lutte contre les maladies du riz contenant cet eliciteur comme ingredient actif
JPH1129412A (ja) * 1997-07-09 1999-02-02 Kagaku Gijutsu Shinko Jigyodan ファイトアレキシン誘導剤

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10236909A (ja) * 1997-02-27 1998-09-08 Hiroshi Kawai 稲いもち病の予防方法及び稲いもち病予防用組成物
WO1998047364A1 (fr) * 1997-04-21 1998-10-29 Plant Biological Defense System Laboratories Procede de selection d'un eliciteur induisant la production de phytoalexine dans le riz et agent de lutte contre les maladies du riz contenant cet eliciteur comme ingredient actif
JPH1129412A (ja) * 1997-07-09 1999-02-02 Kagaku Gijutsu Shinko Jigyodan ファイトアレキシン誘導剤

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