Method for producing plants, and system for producing plants

Abstract

To provide a method for producing plants in which the content of functional components of plants can be increased more easily.SOLUTION: A method for producing plants has a step of irradiating the plants with light of predetermined illuminance, which has a peak at a predetermined time and a predetermined wavelength from a predetermined point of time before harvesting the plants, where the plants are sprout or lettuce, the predetermined wavelength is at least any one of 260 to 270nm, 305 to 315nm, and 400 to 410nm, and the predetermined time is 5 minutes or more and 24 hours or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for producing a plant and a system for producing a plant. [Background technology]

[0002] Conventionally, the amount of functional components such as polyphenols in plants has been increased. For example, a method is known in which the synthesis of functional components is promoted by irradiating a plant with light having a specific wavelength during the plant's growth process (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-89430 A Summary of the Invention [Problem to be solved by the invention]

[0004] The technology disclosed in Patent Document 1 has a problem that the energy required for light irradiation is increased because it is necessary to irradiate the plant with light for a considerably long period of time. In addition, there is a problem that the facility for producing the plant is greatly restricted in terms of equipment. Therefore, there has been a demand for a method for more easily increasing the amount of functional components contained in the plant.

[0005] The present invention has been made in consideration of the above, and aims to provide a method for producing a plant that can more easily increase the content of functional components in a plant. [Means for solving the problem]

[0006] The present disclosure relates to a method for producing a plant, comprising a step of irradiating the plant with light of a predetermined illuminance having a peak in a predetermined wavelength range for a predetermined period of time from a predetermined time point before harvesting the plant, wherein the plant is a sprout or lettuce, the predetermined wavelength range is at least any one of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm, and the predetermined period of time is 5 minutes or more and 24 hours or less. Effect of the Invention

[0007] According to the present invention, a method for producing a plant can be provided that can more easily increase the content of functional components in a plant. [Brief description of the drawings]

[0008] [Figure 1] 1 is a graph showing the quercetin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Diagram 2] 1 is a graph showing the rutin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Diagram 3] 1 is a graph showing the quercetin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Figure 4] 1 is a graph showing the rutin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Diagram 5] 1 is a graph showing the quercetin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Figure 6] 1 is a graph showing the rutin content of buckwheat sprouts irradiated with light having a peak wavelength of 265 nm. [Figure 7] 1 is a graph showing the anthocyanin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 8] 1 is a graph showing the anthocyanin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 9] 1 is a graph showing the quercetin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 10] 1 is a graph showing the anthocyanin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 11] 1 is a graph showing the anthocyanin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 12] 1 is a graph showing the quercetin content of buckwheat sprouts irradiated with light having a peak wavelength of 405 nm. [Figure 13] 1 is a graph showing the anthocyanin content of sunny lettuce irradiated with light having a peak wavelength of 265 nm. [Figure 14] 1 is a graph showing the quercetin content of sunny lettuce irradiated with light having a peak wavelength of 265 nm. [Figure 15] 1 is a graph showing the quercetin content of sunny lettuce irradiated with light having a peak wavelength of 265 nm. [Figure 16] 1 is a graph showing the anthocyanin content of sunny lettuce irradiated with light having a peak wavelength of 405 nm. [Figure 17] 1 is a graph showing the quercetin content of sunny lettuce irradiated with light having a peak wavelength of 405 nm. [Figure 18] FIG. 1 is a block diagram showing a configuration of a plant production system according to an embodiment. [Figure 19] 1 is a block diagram showing a configuration of an information processing device according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <Plant manufacturing method> Hereinafter, an embodiment of the present invention will be described. The method for producing a plant according to this embodiment includes a step of irradiating a plant with light (hereinafter, sometimes referred to as "irradiation light") having a peak in a predetermined wavelength range and a predetermined illuminance for a predetermined time from a predetermined time point before the plant is harvested. The above step can increase the amount of functional components contained in the plant. The method for producing a plant according to this embodiment can increase the amount of functional components in a plant in a shorter time than conventional methods, thereby reducing the energy required for light irradiation. In addition, the above step can be easily incorporated into the method for producing a plant, which has a wide range of applicability and can reduce equipment costs.

[0010] (plant) The plant produced by the plant production method according to the present embodiment is a sprout or lettuce. Sprouts refer to seeds of grains, vegetables, beans, etc. that are exposed to light to germinate, and the germinated sprouts and stems are used as food. Sprouts are not particularly limited, but examples thereof include buckwheat sprouts, broccoli sprouts, alfalfa sprouts, and cress sprouts. Lettuce is a leaf vegetable belonging to the Asteraceae family, and examples thereof include leaf lettuce such as sunny lettuce and green leaf, crisp, salad greens, and romaine lettuce.

[0011] The functional components contained in plants include flavonoids, which are a type of polyphenol that is an antioxidant. Flavonoids include, but are not limited to, quercetin, anthocyanin, rutin, etc. In addition to the above, flavonoids may also include sesamin, isoflavone, theaflavin, hesperidin, luteolin, naringin, tannin, catechin, etc.

[0012] (Irradiation light) The irradiating light is light having a peak in a predetermined wavelength range, and the predetermined wavelength range is at least one of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm. The irradiating light may be any one of these wavelength ranges or a combination of a plurality of these wavelength ranges.

[0013] When the plant is a sprout, the predetermined time point at which irradiation of the plant with the irradiating light begins is preferably a predetermined time point 3 to 5 days before harvesting. Note that the period from germination of sprouts to harvesting is, for example, around 2 weeks.

[0014] When the plant is lettuce, the above-mentioned predetermined time is preferably a predetermined time 5 to 10 days before harvest. The period from germination of lettuce to harvest is, for example, about 4 weeks.

[0015] The predetermined time for which the light is irradiated to the plant is preferably 5 minutes or more and 24 hours or less. From the viewpoint of sufficiently increasing the content of the functional component in the plant, reducing the irradiation energy and irradiation time, and preventing damage to the plant, the predetermined time may be 5 minutes or more and 12 hours or less, 5 minutes or more and 60 minutes or less, 5 minutes or more and 30 minutes or less, or 5 minutes or more and 10 minutes or less.

[0016] The illuminance of the irradiated light is 0.01 to 0.05 mW / cm when the predetermined peak wavelength is 260 to 270 nm. 2 When the predetermined peak wavelength is 305 to 315 nm, it is preferably 0.1 to 0.5 mW / cm 2 When the predetermined peak wavelength is 400 to 410 nm, it is preferably 1.0 to 5.0 mW / cm 2 It is preferable that:

[0017] The predetermined wavelength range, the predetermined time, the predetermined time, and the illuminance of the above-mentioned irradiation light are preferably adjusted according to the type of plant and the type of functional ingredient to be increased. An example of a combination of preferable irradiation light conditions and plants is described below, but the content of the present invention is not limited to the following content.

[0018] When the type of plant is a sprout and the predetermined peak wavelength is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm 2In this case, the predetermined time is preferably 5 minutes or more and 60 minutes or less, and more preferably 10 minutes or more and 60 minutes or less.

[0019] When the type of plant is a sprout and the predetermined peak wavelength is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm 2 It is preferable that the predetermined illuminance is 3.0 to 5.0 mW / cm 2 In this case, the predetermined time is preferably 5 minutes or more and 60 minutes or less.

[0020] When the type of plant is sunny lettuce and the predetermined peak wavelength is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm 2 In this case, the predetermined time is preferably 5 minutes or more and 60 minutes or less.

[0021] When the type of plant is sunny lettuce and the predetermined peak wavelength is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm 2 In this case, the predetermined time is preferably 5 minutes or more and 60 minutes or less.

[0022] The method for producing a plant according to the present embodiment may include any step other than the above steps, as long as the effects of the present invention are not impaired. The optional step is not particularly limited and may include any known step. For example, in addition to the above steps, the method may include a step of irradiating the plant with sunlight, or a step of irradiating the plant with artificial light having any wavelength for growing the plant.

[0023] <Plant production system> 18 and 19, the plant production system 100 according to this embodiment includes a light irradiation unit 20 and a control unit 10. In this embodiment, the control unit 10 is provided as a part of the configuration of an information processing device 1, and the light irradiation unit 20 is provided as a part of the configuration of a light irradiation device 2.

[0024] The information processing device 1 is configured to be able to communicate with the light irradiation device 2. The information processing device 1 has a control unit 10 capable of controlling the illuminance and irradiation time of light irradiated from the light irradiation unit 20 to the plant P. In addition to the above, the control unit 10 may be capable of controlling the wavelength range of the light irradiated from the light irradiation unit 20. Details of the control performed by the control unit 10 may be control in accordance with the contents explained in the above-mentioned plant manufacturing method. The program for performing the above-mentioned control may be stored in, for example, the ROM 12 or the storage unit 18 explained below.

[0025] Fig. 19 is a block diagram showing a hardware configuration of the information processing device 1. As shown in Fig. 19, the information processing device 1 may include an input / output unit 16, a communication means 17, and a storage unit 18 in addition to a control unit 10. The control unit 10 includes, for example, a processor 11, a read only memory (ROM) 12, a random access memory (RAM) 13, a bus 14, and an input / output interface 15. The information processing device 1 may be a general-purpose personal computer capable of executing various functions by installing various programs, or may be a computer built into dedicated hardware.

[0026] The processor 11 performs various calculations and processes. The processor 11 is not particularly limited, but examples thereof include a central processing unit (CPU) and a graphics processing unit (GPU).

[0027] The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. The processor 11 executes various processes according to a program recorded in the ROM 12 or a program loaded into the RAM 13. A part or the whole of the program may be incorporated in the circuitry of the processor 11.

[0028] The bus 14 is connected to an input / output interface 15. To the input / output interface 15, an input / output unit 16, a communication means 17, and a storage unit 18 are connected.

[0029] The input / output unit 16 is configured with, for example, an input unit such as a keyboard and a mouse, and an output unit such as a display and a speaker. Note that the input / output unit 16 may be configured such that the output function and the input function are integrated together, such as a touch panel.

[0030] The communication means 17 is a wireless or wired communication means for the processor 11 to communicate with the light irradiation unit 20 via the communication unit 21. The communication means 17 may communicate via a network such as the Internet.

[0031] The storage unit 18 is a device that stores a light irradiation history such as the type (wavelength range) of light irradiated to the plant by the light irradiation unit 20, illuminance, irradiation start time, irradiation end time, etc. The storage unit 18 is a storage device such as a hard disk drive (HDD) or a solid-state drive (SSD).

[0032] The light irradiation device 2 includes a light irradiation section 20 and a communication section 21. In this embodiment, the light irradiation device 2 is configured to be able to communicate with the information processing device 1 via the communication section 21.

[0033] The light irradiation unit 20 is a device capable of irradiating the plant P with irradiation light L having a peak in a predetermined wavelength range. The predetermined wavelength range is at least one of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm. The irradiation light L may be light having a peak in any one of the above wavelength ranges, or may be light having peaks in the above multiple wavelength ranges.

[0034] The light irradiation unit 20 as described above is not particularly limited, and may be, for example, an LED irradiation device. The LED irradiation device may be a combination of a plurality of LED irradiation devices each capable of irradiating light in the above wavelength range. Alternatively, the LED irradiation device may be an LED irradiation device equipped with a plurality of LED chips of different wavelengths and capable of irradiating light of different wavelengths in combination or by switching between them.

[0035] The light irradiation unit 20 is configured to be able to change (control) the illuminance. When the light irradiation unit 20 is an LED irradiation device, the illuminance control method may be an analog method in which an input voltage is controlled by switching a resistor connected to an LED, or a PMW (Pulse Width Modulation) control method.

[0036] The communication unit 21 receives a control signal transmitted from the control unit 10 via the communication means 17. In response to the control signal, control such as switching between irradiation and non-irradiation of the irradiation light L irradiated from the light irradiation unit 20, changing the illuminance of the irradiation light L, and switching the wavelength of the irradiation light L is executed.

[0037] The present invention is not limited to the above-described embodiment, and the present invention includes modifications and improvements within the scope that can achieve the object of the present invention.

[0038] In the above embodiment, the plant manufacturing system 100 has been described as including the information processing device 1 and the light irradiation device 2 as separate devices capable of communicating with each other. However, the present invention is not limited to the above, and the plant manufacturing system may include, for example, a control unit 10 incorporated in the light irradiation device 2 for controlling the illuminance and irradiation time of light irradiated from the light irradiation unit 20. EXAMPLES

[0039] Next, an embodiment of the present invention will be described, but the present invention is not limited to this embodiment.

[0040] (Light irradiation test on buckwheat sprouts) Starting from three days before harvest, the buckwheat sprouts were irradiated with light under conditions 1 to 7 shown in Table 1. The light irradiation devices used were VM0303F (manufactured by Nikkiso Co., Ltd.) with a peak wavelength of 265 nm (tolerance ±5 nm) and DEL-6zPW (Delphys Co., Ltd.) with a peak wavelength of 405 nm (tolerance ±5 nm).

[0041] (Light irradiation test on sunny lettuce) Starting one week before harvest, sunny lettuce was irradiated with light under conditions 8 to 10 shown in Table 1. The light irradiation device used was the same as that used for the buckwheat sprouts.

[0042] [Table 1]

[0043] (Measurement of functional ingredient content) After each plant was irradiated with light under each condition shown in Table 1, it was harvested and the content of each functional component was measured. Quercetin was measured using OxiSelect Flavonoid Assay Kit (Cell Biolabs) with 1420 ARVOsx multilabel counter (Wallac). Anthocyanin was measured by extracting the components with hydrochloric acid and measuring them with UV-1800 ultraviolet-visible spectrophotometer (Shimadzu Corporation). The measurement results are shown in Figures 1 to 17. In Figures 1 to 17, "Control" refers to a plant harvested under the same conditions but without the light irradiation shown in Table 1. In the following description, "increased" of each functional component means a comparison with the above control.

[0044] <Condition 1> As shown in Figures 1 and 2, the peak wavelength for buckwheat sprouts was 265 nm and the illuminance was 0.01 mW / cm 2 When exposed to light for 60 minutes, the quercetin content increased by about 1.12 times. Similarly, the rutin content increased by about 1.1 times after 10 minutes and by about 1.28 times after 60 minutes.

[0045] <Condition 2> As shown in Figures 3 and 4, the peak wavelength was 265 nm and the illuminance was 0.05 mW / cm for buckwheat sprouts. 2 When exposed to light for 10 minutes, the quercetin content increased by about 1.31 times. Similarly, the rutin content increased by about 1.4 times when exposed to light for 10 minutes or more.

[0046] <Condition 3> As shown in Figures 5 and 6, when buckwheat sprouts were irradiated with light of a peak wavelength of 265 nm for 24 hours, the illuminance of the light was 0.05 mW / cm 2 The quercetin content increased by about 1.31 times when the diet was added. The rutin content did not increase in either case.

[0047] <Condition 4> As shown in Figure 7, the peak wavelength was 405 nm and the illuminance was 3.0 mW / cm for buckwheat sprouts. 2 When exposed to light for 30 minutes, the anthocyanin content increased by about 1.3 times.

[0048] <Condition 5> As shown in Figures 8 and 9, the peak wavelength was 405 nm and the illuminance was 5.0 mW / cm for buckwheat sprouts. 2 When exposed to light for 30 minutes, the anthocyanin content increased by about 1.3 times. Similarly, the quercetin content increased by about 1.2 times after 10 minutes.

[0049] <Condition 6> As shown in Figures 10 and 11, when buckwheat sprouts were irradiated with light with a peak wavelength of 405 nm for 12 hours, the content of functional ingredients decreased in both cases.

[0050] <Condition 7> As shown in Figure 12, when buckwheat sprouts were irradiated with light of a peak wavelength of 405 nm for 24 hours, the illuminance of the light was 1.0 mW / cm 2 When the treatment was performed, the anthocyanin content increased by approximately 1.39 times.

[0051] <Condition 8> As shown in Figures 13 and 14, the peak wavelength was 265 nm and the illuminance was 0.01 mW / cm for sunny lettuce. 2 When exposed to light for 30 minutes, the anthocyanin content increased by about 1.3 times. Similarly, the quercetin content increased by about 1.6 times after 60 minutes.

[0052] <Condition 9> As shown in Figure 15, for sunny lettuce, the peak wavelength was 265 nm and the illuminance was 0.05 mW / cm 2 When exposed to light for 10 minutes, the quercetin content increased by approximately 1.1 times.

[0053] <Condition 10> As shown in Figures 16 and 17, when sunny lettuce is irradiated with light of a peak wavelength of 405 nm for 1 hour, the illuminance of the light is 1.0, 3.0, and 5.0 mW / cm 2 In both cases, the anthocyanin content increased by more than 1.2 times, and the quercetin content increased by about 1.63 times.

[0054] Preferred embodiments of the present invention are described below.

[0055] [1] A method for producing a plant, comprising the step of irradiating the plant with light of a predetermined illuminance having a peak in a predetermined wavelength range, for a predetermined period of time, from a predetermined time point before harvesting the plant, wherein the plant is a sprout or lettuce, the predetermined wavelength range is at least one of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm, and the predetermined period of time is at least 5 minutes and no more than 24 hours.

[0056] [2] When the plant is a sprout, and the predetermined wavelength range is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm 2 and when the predetermined wavelength range is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm 2 The method for producing a plant according to [1],

[0057] [3] When the plant is lettuce and the predetermined wavelength range is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm 2 and the predetermined time is 5 minutes or more and 60 minutes or less, and when the predetermined wavelength range is 305 to 315 nm, the predetermined illuminance is 0.1 to 0.5 mW / cm 2 and when the predetermined wavelength range is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm 2 The method for producing a plant according to [1] or [2], wherein the specified time is 5 minutes or more and 60 minutes or less.

[0058] [4] The method for producing a plant described in any of [1] to [3], wherein the specified time is 3 to 5 days before harvesting if the plant is a sprout, and 5 to 10 days before harvesting if the plant is lettuce.

[0059] [5] A method for producing a plant according to any one of [1] to [4], comprising increasing the content of at least any one of anthocyanin, quercetin, and rutin contained in the plant compared to a case in which the plant is not irradiated with the light.

[0060] [6] A plant production system that carries out the plant production method described in any one of [1] to [5], comprising a light irradiation unit and a control unit, wherein the light irradiation unit is capable of irradiating the plant with light having a peak in at least any one of the wavelength ranges of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm, and the control unit is capable of controlling the illuminance and irradiation time of the light irradiated from the light irradiation unit. [Explanation of symbols]

[0061] 100 Plant manufacturing system 10 Control section 20 Light irradiation unit L light P plant

Claims

1. A method for producing a plant, comprising: irradiating the plant with light having a peak in a predetermined wavelength range and a predetermined illuminance for a predetermined period of time from a predetermined time point before harvesting the plant; the plant is a sprout or lettuce; The predetermined wavelength range is at least one of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm, The method for producing a plant, wherein the specified period of time is 5 minutes or more and 24 hours or less.

2. the plant is a sprout; When the predetermined wavelength range is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm ２ and When the predetermined wavelength range is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm ２ The method for producing a plant according to claim 1,

3. the plant is lettuce, When the predetermined wavelength range is 260 to 270 nm, the predetermined illuminance is 0.01 to 0.05 mW / cm ２ The predetermined time is 5 minutes or more and 60 minutes or less, When the predetermined wavelength range is 305 to 315 nm, the predetermined illuminance is 0.1 to 0.5 mW / cm ２ and When the predetermined wavelength range is 400 to 410 nm, the predetermined illuminance is 1.0 to 5.0 mW / cm ２ The method for producing a plant according to claim 1 or 2, wherein the predetermined time is 5 minutes or more and 60 minutes or less.

4. 3. The method for producing a plant according to claim 1, wherein the predetermined time point is 3 to 5 days before harvesting when the plant is a sprout, and is 5 to 10 days before harvesting when the plant is a lettuce.

5. A method for producing the plant according to claim 1 or 2, comprising the steps of: A method for producing a plant, which increases the content of at least any one of anthocyanin, quercetin, and rutin contained in the plant compared to a case in which the plant is not irradiated with the light.

6. A plant production system for carrying out the plant production method according to claim 1 or 2, The light emitting unit and the control unit are included. The light irradiation unit is capable of irradiating the plant with light having a peak in at least one of a wavelength range of 260 to 270 nm, 305 to 315 nm, and 400 to 410 nm, A plant manufacturing system, wherein the control unit is capable of controlling the illuminance and irradiation time of the light irradiated from the light irradiation unit.

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