WO2014201744A1 - 一种柑橘黄龙病快速诊断方法 - Google Patents
一种柑橘黄龙病快速诊断方法 Download PDFInfo
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- WO2014201744A1 WO2014201744A1 PCT/CN2013/079470 CN2013079470W WO2014201744A1 WO 2014201744 A1 WO2014201744 A1 WO 2014201744A1 CN 2013079470 W CN2013079470 W CN 2013079470W WO 2014201744 A1 WO2014201744 A1 WO 2014201744A1
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- leaves
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Classifications
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/5097—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving plant cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56961—Plant cells or fungi
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/43504—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from invertebrates
- G01N2333/43552—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from invertebrates from insects
Definitions
- the invention belongs to the field of citrus disease prevention and control, and particularly relates to a rapid diagnosis method for citrus Huanglong disease. Background technique:
- Citrus pests and diseases are a major obstacle to the development of the citrus industry, the most serious of which is the citrus Huanglong disease known as citrus "cancer". With the rapid development of citrus production, the occurrence and damage of citrus Huanglongbing has become more and more serious.
- the disease is a highly contagious disease with a long epidemic, a wide range of morbidity and a high incidence. It results in short life span, low yield and high production cost in most parts of China. The annual economic loss is as high as billions. The US dollar has seriously plagued and restricted the development of the citrus industry in China and the world.
- detection and diagnosis techniques are mainly used for field symptom diagnosis and indication plant identification, electron microscopy detection, immunological detection and diagnosis, nucleic acid molecule detection and diagnosis, and diagnostic methods based on starch iodine reaction (Zhang Liping, 2009), in which PCR technology is the current mainstream technology ( Deng Xiaoling et al., 1999; Wang Zhongkang et al., 2004; Meng Xiangchun et al., 2007).
- the diagnostic method based on starch iodine reaction originated from Schneider (1968). It was found that the starch content of the leaves infected by Huanglongbing was very high.
- the present inventors have found through research that the current starch coloring technology is not widely used for the following reasons: (1) Since the morning sampling, the effect of normal leaf starch is not really eliminated. Normal leaves undergo photosynthesis to accumulate starch, sometimes due to environmental factors, may not be completely transferred at night, resulting in starch residues in normal leaves in the morning; (2) Because the above techniques do not remove chlorophyll, there is interference during color development, which may also affect the accuracy of detection and diagnosis. Rate; (3) The above diagnostic technique needs to be mixed with water for grinding, and the starch is insoluble in water, mixed with water for color reaction, and the accuracy is easily affected. Summary of the invention:
- the method for rapid diagnosis of citrus Huanglongbing of the present invention comprises the following steps: a. Dark treatment: Covering the leaves of the citrus to be detected with a black bag, sealing, and darkening for 12-24 hours to obtain darkly treated leaves Or collect the branches of the citrus to be tested, bring them back into the room, insert them in water, cover the leaves with black bags or place them in a dark room, darkly treat them for 12-24 hours, collect the leaves to obtain darkly treated leaves; or Before exiting, collect the leaves of the citrus to be tested overnight as the dark treated leaves;
- Freezing treatment of the leaves Shearing the leaves after dark treatment, at least cutting one side of the main vein of the blade, cutting from the side of the blade along the lateral vein of the blade to the main vein of the blade until the main vein, but not cutting the main Pulse, thus cutting the leaves into thin strips with a number of thin strips, then placed at -4 ⁇ - 15 °C frozen 12 ⁇ 24 small When the frozen leaves are obtained; or the darkly treated leaves are frozen at -4 to - 15 °C for 12 to 24 hours, and then the leaves are sheared, at least one side of the main vein of the blade is cut, from The lateral side of the blade is cut along the lateral vein of the blade to the main vein of the blade until the main vein, but the main vein is not cut, so that the blade is cut into thin strips with several thin strips to obtain the frozen leaf;
- Color detection Add starch chromogenic solution on the strips of the decolorized leaves, and then observe the color change of the leaves. If the leaves turn blue, the leaves of the citrus to be detected are infected with Huanglong disease, if the leaves are not discolored. , then normal leaves.
- the chlorophyll decolorizing liquid refers to a solution capable of removing chlorophyll, and is preferably a mixture of one or more of an organic solvent such as acetone, ethanol, benzene, toluene or xylene.
- the starch coloring liquid refers to a solution capable of developing colored starch, and is preferably iodine, potassium iodide solution or polyvinylpyrrolidone iodine.
- the strip is preferably a strip of 1 mm width.
- the starch in the normal leaves is transferred by dark treatment, and no starch is accumulated in the leaves.
- the screen of the Huanglong disease is blocked by the screen, the starch cannot be transferred and deposited in the leaves. Therefore, the dark treatment can truly eliminate the influence of the normal leaf starch and improve the accuracy.
- the main purpose of the leaf freezing treatment is to remove chlorophyll, because the chlorophyll is not completely removed in the prior art, and there is interference in color development, which also affects the accuracy of detection and diagnosis.
- the invention freezes, the fusion at temperature accelerates the rupture of the cell membrane, thereby shortening the leaching time of chlorophyll, and by cutting the leaves into thin strips, the chlorophyll can be accelerated, but not completely cut, and the shape of the leaves is maintained. Conducive to the subsequent steps, through the above steps to accelerate the dissolution of chlorophyll, and help the chlorophyll dissolve completely to remove chlorophyll.
- the decolorization of the leaves is to dissolve and extract the chlorophyll in the leaves by using the chlorophyll decolorizing solution until the leaves become white, thereby completely removing the chlorophyll, avoiding the interference due to the presence of chlorophyll, and affecting the accuracy of detection and diagnosis.
- the color detection is based on the principle that the leaves of Huanglong disease are rich in starch, the starch is iodine-blue, and the normal leaves do not contain starch, and the color is unchanged.
- the above-mentioned decolorized leaves are detected and diagnosed by using starch coloring solution, thereby determining Check if the leaves are yellow dragon disease leaves.
- Table 1 The difference between the rapid diagnosis method of the citrus Huanglong disease of the present invention and the prior art is shown in Table 1:
- the shape of the blade is ground and then slurried.
- the leaves are cut into thin strips, the main veins are continuous, and the overall shape of the leaves is unchanged.
- Color development, color development on the reaction film, color development directly on the blade is unchanged.
- the invention effectively removes the residual starch in the leaves, removes the influence of residual starch, and then removes the chlorophyll effectively, removes the influence of chlorophyll, directly develops color on the leaves, does not need to be mixed with water, thereby avoiding the starch being insoluble.
- accuracy is easily affected, which greatly improves the diagnostic accuracy of citrus Huanglongbing, and achieves a rapid diagnosis of citrus Huanglongbing, which provides effective prevention and treatment of Huanglongbing. Detection means, is conducive to the prevention and treatment of Huanglong disease.
- FIG. 1 is a schematic view of three cases in which the blade is cut into thin strips. A indicates that only one side of the main vein is cut, B indicates that both sides of the main vein are sheared, and C indicates that one side of the main vein is removed. Cutting the remaining one side blade;
- FIG. 2 is a diagnosis result diagram of Embodiment 1;
- Figure 3 is a diagram showing the diagnosis results of Example 2.
- Figure 4 is a diagram showing the diagnosis results of Example 3.
- Figure 5 is a diagram showing the diagnosis results of Example 4.
- Figure 6 is a diagram showing the diagnosis results of Example 5.
- Figure 7 is a diagram showing the diagnosis results of Example 6;
- Fig. 8 is a graph showing the results of diagnosis of Example 7. detailed description:
- Example 1 Detection and diagnosis of granulated huanglongbing disease.
- the pulse direction is cut to the main vein of the blade until the main vein, but the main vein is not cut, so that the blade is cut into thin strips with a number of strips of width lmm, as shown in Fig. 1A), placed in the frozen layer of the refrigerator, and the freezing temperature is frozen. It is -10 ° C.
- the frozen leaves were taken at 8:00 am on the 14th, placed in a test tube, and 25 mL of chlorophyll decoloring solution (acetone) was added, and shaken 2-3 times in the middle. At 3 o'clock in the afternoon, the thin blades turned white, and the test tube decolorization liquid was poured off to obtain the decolorized leaves.
- the starch coloring liquid (iodine) was directly dropped on the strips of the decolored leaves, and the change in the color of the leaves was observed for diagnosis.
- the results are shown in Fig. 2.
- a in Fig. 2 is the blade to be detected of the present embodiment, and B is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf. It can be seen from FIG. 2 that after the coloration of the blade (A) to be detected in this embodiment is performed, the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, and the normal leaf (B) is not discolored. , thus identified as normal leaves that do not suffer from Huanglongbing. The detection result is consistent with the detection result using the conventional nucleic acid molecule detection.
- Example 2 Detection and diagnosis of horse water orange dragon disease
- the thin strips of the leaves turn white, pour off the decolorizing liquid, take out the leaves, obtain the decolorized leaves, and add the starch coloring solution on the strips of the decolorized leaves ( Potassium iodide solution) Diagnosis.
- a in Fig. 3 is the blade to be detected of the present embodiment, and B is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf.
- the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, and the normal leaf (B) is not discolored. , thus identified as normal leaves that do not suffer from Huanglongbing.
- the detection result is consistent with the detection result using the conventional nucleic acid molecule detection.
- Example 3 Detection and diagnosis of Luogang orange yellow dragon disease.
- the side edge is cut along the lateral vein of the blade to the main vein of the blade until the main vein, but the main vein is not cut, so that the blade is cut into strips with a number of strips of width lmm, as shown in Fig. 1A), placed in the frozen layer of the refrigerator. Freeze, freezing temperature is -4 °C.
- freezing temperature is -4 °C.
- the frozen leaf pieces were taken out, placed in a test tube, and 25 mL of chlorophyll decolorizing solution (acetone) was added, and the mixture was shaken 2-3 times.
- the thin strips turned white, and the test tube decolorization liquid was poured off to obtain the decolorized leaves.
- the starch coloring liquid (iodine) was directly dropped on the strips of the decolored leaves, and the change in the color of the leaves was observed for diagnosis.
- FIG. 4 B in Fig. 4 is the blade to be detected of the present embodiment, and A is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf. It can be seen from FIG. 4 that after the coloration of the blade (B) to be inspected in this embodiment, the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, while the normal leaf (A) does not change color. , thus identified as normal leaves that do not suffer from Huanglongbing. This test result is consistent with the detection of diagnostic results using conventional nucleic acid molecules.
- Example 4 Detection and diagnosis of navel orange yellow dragon disease
- FIG. 5 The result is shown in Fig. 5.
- B and C in Fig. 5 are the blades to be detected of the embodiment, and A is already It is proved by the prior art that it is not a normal leaf of the yellow dragon disease leaf.
- the thin strips of the leaves are blue, thereby identifying that the leaves to be detected are Huanglong diseased leaves, while the normal leaves (A) are It does not change color, and thus is identified as a normal leaf that does not suffer from Huanglongbing.
- the detection result is consistent with the detection result using the conventional nucleic acid molecule detection.
- Example 5 Detection and diagnosis of Hongjiang orange yellow dragon disease
- the branches of Hongjiang Orange to be tested were collected at 1 pm on May 23, 2013, brought back indoors, the branches were inserted in the water, and placed in the dark room at 8 am on the 24th. After dark treatment, the darkened leaves were obtained, and then placed in a freezer layer to freeze at a temperature of -4 V. After 24 hours, the leaves were cut into strips of about 1 mm width (the blade side was from the blade side). The edge of the blade is cut toward the main vein of the blade, until the main vein, but the main vein is not cut, so that the blade is cut into strips with a number of strips of width lmm, as shown in Fig. 1A), and the frozen leaves are obtained.
- FIG. 6 A in Fig. 6 is the blade to be detected of the present embodiment, and B is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf. It can be seen from FIG. 6 that after the coloration of the blade (A) to be detected in this embodiment is performed, the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, and the normal leaf (B) does not change color. , thus identified as normal leaves that do not suffer from Huanglongbing. This test result is consistent with the detection of diagnostic results using conventional nucleic acid molecules.
- Example 6 Detection and diagnosis of summer orange yellow dragon disease
- FIG. 7 A in Fig. 7 is the blade to be tested of the present embodiment, and B is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf. It can be seen from FIG. 7 that after the coloration of the blade (A) to be detected in this embodiment is performed, the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, and the normal leaf (B) is not discolored. , thus identified as normal leaves that do not suffer from Huanglongbing. This test result is consistent with the detection of diagnostic results using conventional nucleic acid molecules.
- Example 7 Detection and diagnosis of Huangdan Huanglong disease.
- the branches of the emperor to be tested were collected in the Deqing Citrus Garden, brought back into the room, the branches were inserted in the water, and the leaves were covered with black bags for dark treatment, and dark treatment was carried out for 24 hours.
- the leaves after dark treatment (the leaves to be detected, diagnosed by nucleic acid molecules, which are Huanglong disease leaves), the darkly treated leaves were placed in the freezer layer for freezing for 14 hours at 6 pm on May 30, and the freezing temperature was -10 °C, at 8 am on May 31, the leaves are cut into strips about 1 mm wide (the blade side is cut from the side of the blade along the lateral vein of the blade to the main vein of the blade, until the main vein, but the main vein is not cut, so that the blade Cut into a thin strip with a number of strips of width lmm, as shown in Fig.
- FIG. 8 B in Fig. 8 is the blade to be detected of the present embodiment, and A is a normal leaf which has been proved by the prior art to be not a yellow dragon disease leaf. It can be seen from FIG. 8 that after the coloration of the blade (B) to be detected in this embodiment is performed, the thin strip-shaped blade is blue, thereby identifying that the leaf to be detected is a yellow dragon disease leaf, and the normal leaf (A) is not discolored. , thus identified as normal leaves that do not suffer from Huanglongbing. The test results and use often
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Priority Applications (2)
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US14/898,965 US9921213B2 (en) | 2013-06-19 | 2013-07-16 | Rapid diagnosis method of citrus huanglongbing |
AU2013393172A AU2013393172B2 (en) | 2013-06-19 | 2013-07-16 | Method for rapidly diagnosing citrus yellow shoot disease |
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CN201310244391.7A CN103278367B (zh) | 2013-06-19 | 2013-06-19 | 一种柑橘黄龙病快速诊断方法 |
CN201310244391.7 | 2013-06-19 |
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CN (1) | CN103278367B (zh) |
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CN103798012B (zh) * | 2013-12-12 | 2015-06-24 | 广西大学 | 利用长春花筛选抗韧皮部杆菌药物的方法 |
CN103820561B (zh) * | 2014-03-10 | 2016-04-20 | 广西壮族自治区农业科学院园艺研究所 | 一种柑橘黄龙病亚洲种巢氏pcr扩增检测体系及应用 |
CN104036257B (zh) * | 2014-06-25 | 2017-11-21 | 华南农业大学 | 基于d‑s理论的多源数据融合柑橘黄龙病检测分类方法 |
CN104132938A (zh) * | 2014-07-09 | 2014-11-05 | 广东省昆虫研究所 | 一种柑橘黄龙病快速检测方法 |
CN106018332A (zh) * | 2016-07-21 | 2016-10-12 | 华南农业大学 | 一种柑桔黄龙病的近红外光谱田间检测方法 |
CN109765227A (zh) * | 2019-03-19 | 2019-05-17 | 广西钦州农业学校 | 柑橘黄龙病的叶脉-碘酊快速检测诊断方法 |
CN117268864A (zh) * | 2022-10-18 | 2023-12-22 | 衢州学院 | 一种用于胡柚黄龙病田间批量检测装置 |
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US20160195517A1 (en) | 2016-07-07 |
CN103278367A (zh) | 2013-09-04 |
AU2013393172A1 (en) | 2016-02-11 |
US9921213B2 (en) | 2018-03-20 |
CN103278367B (zh) | 2015-06-24 |
AU2013393172B2 (en) | 2016-09-22 |
AU2013393172A8 (en) | 2016-02-25 |
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