Leaf fixer suitable for photosynthesis determination of small leaves and broken leaves in arid region

Abstract

The utility model relates to the technical field of plant photosynthesis research, and discloses a leaf fixer suitable for photosynthesis determination of small leaves and broken leaves in an arid region, which is suitable for photosynthesis instruments and comprises two side plates and two transverse plates, the two side plates and the two transverse plates are spliced into a frame structure, and the front end and the rear end of the frame structure are respectively provided with a baffle; the two adjusting assemblies are arranged on the two side plates correspondingly, each adjusting assembly comprises two adjusting parts, a sliding groove is formed in each side plate, the two adjusting parts are slidably connected to the two ends of the sliding groove correspondingly, and the transverse plate is connected with the adjusting parts; the two limiting pieces are arranged in the sliding grooves in the two side plates respectively, and the adjusting pieces are matched with the limiting pieces in a limiting mode. According to the utility model, through the independent fixer which is conveniently connected with the leaf clamp, the problems of the leaf clamp of the existing photosynthesis instrument in the determination of special-shaped leaves such as small leaves and broken leaves in the arid region are perfectly avoided, the manufacturing is simple and convenient, the cost is low, and the convenience and the accuracy of the existing photosynthesis instrument in the research of plant photosynthesis in the arid region are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plant photosynthesis research, in particular to a leaf fixer suitable for photosynthesis measurement of small leaves and broken leaves in arid areas. Background Art

[0002] Photosynthesis is the most important physiological function of plants and a metabolic activity that is particularly sensitive to environmental changes. Photosynthesis consists of two steps: the light reaction and the dark reaction. The dark reaction occurs in the absence of light and reflects the efficiency of plants in synthesizing carbohydrates from CO2. It is an absolute indicator of photosynthetic capacity. Therefore, measuring CO2 increments through gas exchange has become an important method for measuring plant photosynthesis.

[0003] Currently, commonly used instruments that focus on the dark phase of photosynthesis and utilize gas exchange parameters to measure photosynthesis include the photosynthesis system LiCor-6800 and GFS-3000. These systems operate by placing a fixed-area leaf in a sealed chamber and using an infrared CO2 analyzer to measure the change in CO2 within the chamber, thereby determining the CO2 assimilation rate per unit time and per unit area. The sealing state of the leaf in the chamber and the measurement of leaf area are crucial.

[0004] Most plants, especially those in humid and semi-humid regions, have thin, large leaves. Therefore, leaf clips manufactured by instrument manufacturers are primarily designed for these thin leaves. However, in arid regions, to reduce water consumption, plants often reduce leaf area or even degenerate leaves to minimize evaporation. Consequently, many plants in arid regions have very small leaves, only a few millimeters in size, and a variety of leaf shapes, with varying degrees of fleshiness, ranging from cylindrical to rice-grain-like, and the leaf tissue is very delicate.

[0005] Therefore, when using common photosynthesis instruments to measure gas (CO2) exchange parameters in small, fleshy leaves in arid regions, two problems arise: First, small plant leaves cannot be fixed in the leaf chamber, and the slight pressure of the leaf clip can damage the leaf epidermis and the leaves. Furthermore, the leaf clip is difficult to seal, resulting in inaccurate measurement data. Second, the standard leaf clip that comes with the instrument cannot secure the leaves, making it difficult to obtain accurate leaf area data, and subsequent leaf area measurements are often inaccurate. In other words, the problems of both the inability to standardize and quantify leaves and the damage to leaves seriously limit the use of these common photosynthesis instruments for physiological measurements of desert plants in arid regions.

[0006] Therefore, there is an urgent need for a leaf holder suitable for photosynthesis measurement of small leaves and broken leaves in arid areas to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a leaf holder suitable for photosynthesis measurement of small leaves and broken leaves in arid areas, so as to solve the problems existing in the above-mentioned prior art.

[0008] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a leaf holder suitable for photosynthesis measurement of small leaves and broken leaves in arid areas, suitable for photosynthesis instruments, comprising:

[0009] Two side panels and two transverse panels, the two side panels and the two transverse panels are spliced ​​into a frame structure, and the front and rear ends of the frame structure are respectively provided with baffles, and the plant leaves are blocked in the frame structure by the two baffles;

[0010] Two adjustment assemblies, the two adjustment assemblies are respectively arranged on the two side panels, the adjustment assemblies include two adjustment pieces, a slide groove is opened in the side panel, the two adjustment pieces are respectively slidably connected to the two ends of the slide groove, and the cross plate is connected to the adjustment pieces;

[0011] The two limiting members are respectively arranged in the sliding grooves on the two side panels, and the adjusting member is limitedly matched with the limiting members.

[0012] Preferably, the adjusting member includes a sliding rod and two sliders, the sliding rod is fixedly connected to the sliding groove, the two sliders are slidably connected to the two ends of the sliding rod, a plug-in hole is provided on the side of the slider close to the horizontal plate, and plug-in blocks are fixedly connected at both ends of the horizontal plate, and the plug-in hole is adapted to the plug-in block.

[0013] Preferably, the limiting member includes several blocks, and the blocks are fixedly connected to the bottom end of the slide groove along the axial direction. A groove is provided at the bottom end of the slider, and one end of the limiting rod is hinged to the top end of the groove, and the other end of the limiting rod is in contact with the block.

[0014] Preferably, a torsion spring is provided between the limiting rod and the inner wall of the groove, and two ends of the torsion spring are fixedly connected to the limiting rod and the inner wall of the groove respectively.

[0015] Preferably, a spring is sleeved on the slide rod, and both ends of the spring are fixedly connected to the two slide blocks respectively.

[0016] Preferably, the baffle is a glass yarn mesh patch with a pore size of 2mm-5mm.

[0017] Preferably, sponge sealing strips are fixedly connected to both sides of the side panels and the transverse panel.

[0018] Preferably, the cross section of the block is a right triangle.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The utility model provides a leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas. The frame structure is spliced ​​into an integral body structure by side panels and transverse panels and blocked by baffles. It can be used to fix multiple small leaves or a cluster of leaves, and can arrange and fix the leaves on a relatively consistent plane, thereby improving the accuracy of the measurement. The leaf is clamped by a device independent of the instrument leaf clamp, avoiding the operation of repeatedly placing the leaf in the leaf clamp and reducing the damage to the leaf caused by the torsion of the instrument head. The leaf area can be directly photographed, and the leaf area can be conveniently and accurately obtained without affecting the photosynthesis of the leaf and the exchange of gases such as carbon dioxide, and without affecting the measurement of leaf photosynthesis. The frame space size can be adjusted by the provided adjustment members and limit members, and it is suitable for leaves of different sizes and numbers, with a wide range of applications. By adding a holder that is independent and conveniently connected to the leaf clamp, the present application perfectly circumvents the problems existing in the leaf clamp of existing photosynthesis instruments in measuring small and broken leaves in arid areas, and is simple to manufacture and low in cost, greatly improving the convenience and accuracy of existing photosynthesis instruments in photosynthesis research of plants in arid areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work:

[0022] Figure 1 This is a schematic diagram of the utility model showing the side panels and the horizontal panel being separated;

[0023] Figure 2 This is a schematic diagram of the splicing state of the frame structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the side structure of the side panel of the utility model;

[0025] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle part;

[0026] Among them, 1. Side panel; 2. Horizontal panel; 3. Baffle; 4. Slide groove; 5. Slide rod; 6. Slider; 7. Plug hole; 8. Plug block; 9. Card block; 10. Groove; 11. Limit rod; 12. Torsion spring; 13. Spring; 14. Sponge sealing strip. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1-Figure 4 The utility model provides a leaf holder suitable for photosynthesis measurement of small leaves and broken leaves in arid areas, which is suitable for photosynthesis instruments and includes:

[0030] The two side panels 1 and the two horizontal panels 2 are spliced ​​into a frame structure. The front and rear ends of the frame structure are respectively provided with baffles 3. The plant leaves are blocked in the frame structure by the two baffles 3.

[0031] Two adjustment components, the two adjustment components are respectively arranged on the two side plates 1, the adjustment components include two adjustment pieces, a slide groove 4 is opened in the side plate 1, the two adjustment pieces are respectively slidably connected to the two ends of the slide groove 4, and the cross plate 2 is connected to the adjustment piece;

[0032] The two limiting members are respectively arranged in the sliding grooves 4 on the two side plates 1, and the adjusting member is matched with the limiting members in a limiting manner.

[0033] To further optimize the solution, the adjusting part includes a sliding rod 5 and two sliders 6. The sliding rod 5 is fixedly connected to the sliding groove 4. The two sliders 6 are slidably connected to both ends of the sliding rod 5. A plug-in hole 7 is provided on the side of the slider 6 close to the cross plate 2. Both ends of the cross plate 2 are fixedly connected with a plug-in block 8, and the plug-in hole 7 is adapted to the plug-in block 8.

[0034] In one embodiment of the present application, the photosynthesis instrument is preferably a photosynthesis system LiCor-6800 instrument, and a matching simple leaf holder is prepared for this photosynthesis instrument.

[0035] In one embodiment of the present application, refer to Figure 3 The slider 6 moves on the slide rod 5 and slides in the slide groove 4. The horizontal plate 2 is plugged into the plug hole 7 through the plug-in block 8. After plugging, the frame is spliced ​​and has a certain stability, that is, the frame can only be disassembled by manually pulling. After splicing, the position of the horizontal plate 2 can be moved to adjust the size of the internal space of the frame, thereby adapting to blades of different sizes or quantities.

[0036] To further optimize the solution, the limiter includes several blocks 9, which are fixedly connected to the bottom end of the slide groove 4 along the axial direction. A groove 10 is provided at the bottom end of the slider 6. One end of the limit rod 11 is hinged to the top end of the groove 10, and the other end of the limit rod 11 is in contact with the block 9.

[0037] In one embodiment of the present application, refer to Figure 4 The limiting rod 11 is hinged in the groove 10. When the horizontal plate 2 is manually pushed, the limiting rod 11 is driven to move on the card block 9. After moving to the appropriate position, it is stuck in the corresponding card block 9.

[0038] As a further optimized solution, a torsion spring 12 is provided between the limiting rod 11 and the inner wall of the groove 10 , and both ends of the torsion spring 12 are fixedly connected to the limiting rod 11 and the inner wall of the groove 10 respectively.

[0039] In one embodiment of the present application, refer to Figure 4 The force applied by the torsion spring 12 ensures that the limiting rod 11 is reset and in stable contact with the block 9.

[0040] According to a further optimized solution, a spring 13 is sleeved on the slide bar 5 , and both ends of the spring 13 are fixedly connected to the two sliders 6 respectively.

[0041] In one embodiment of the present application, refer to Figure 3 The spring 13 is used to apply a reverse force to the slider 6 to ensure stable limiting of the limiting rod 11 and the block 9.

[0042] According to a further optimized solution, the baffle 3 is a glass yarn mesh patch with an aperture of 2mm-5mm.

[0043] In one embodiment of the present application, based on the requirements of photosynthesis measurement for light transmittance and air permeability of leaves, glass filament gauze is selected as the main fixing material for the upper and lower surfaces. The gauze has its own sticky acrylic glue. The width of the gauze repair patch should be slightly wider than the width of the fixer to facilitate pasting. The aperture of the gauze repair patch is between 2mm-5mm. If it is too small, it will be unfavorable for light exposure, but it should not be too large to lack the fixing effect on the plant leaves. It has environmentally friendly sticky substances around it, which is convenient for pasting on the sponge sealing strip 14.

[0044] According to a further optimized solution, sponge sealing strips 14 are fixedly connected to both sides of the side panels 1 and the cross panel 2.

[0045] In one embodiment of the present application, the sponge sealing strip 14 is preferably made of ethylene propylene diene monomer (EDPA) sponge, which serves as the sealing material on all sides.

[0046] According to a further optimized solution, the cross section of the clamping block 9 is a right triangle.

[0047] In one embodiment of the present application, refer to Figure 4The card block 9 is fixed at the bottom end of the slide 4, and is used to lift the limit rod 11 through the provided inclined surface, and the limit rod 11 is limited by the provided right-angled edge.

[0048] Specifically, the plurality of clamping blocks 9 on both sides are distributed in a mirror image starting from the middle position, and are respectively used to limit the sliders 6 on both sides.

[0049] Specifically, the fixture of the present application is a disposable fixture, which is convenient for batch production of leaf specimens.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A leaf holder suitable for measuring photosynthesis of small leaves and broken leaves in arid areas, suitable for photosynthesis instrument, characterized by: include: Two side panels (1) and two transverse panels (2), the two side panels (1) and the two transverse panels (2) are spliced ​​together to form a frame structure, and blocking pieces (3) are respectively provided at the front and rear ends of the frame structure, and plant leaves are blocked in the frame structure by the two blocking pieces (3); Two adjustment assemblies, the two adjustment assemblies are respectively arranged on the two side plates (1), the adjustment assemblies include two adjustment pieces, a slide groove (4) is provided in the side plate (1), the two adjustment pieces are respectively slidably connected to the two ends of the slide groove (4), and the transverse plate (2) is connected to the adjustment pieces; Two limiting members are respectively arranged in the sliding grooves (4) on the two side plates (1), and the adjusting member is in limiting cooperation with the limiting members.

2. A leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 1, characterized in that: The adjusting member comprises a slide rod (5) and two sliders (6), the slide rod (5) is fixedly connected to the slide groove (4), the two sliders (6) are slidably connected to the two ends of the slide rod (5), a plug hole (7) is provided on the side of the slider (6) close to the cross plate (2), and plug blocks (8) are fixedly connected to both ends of the cross plate (2), and the plug hole (7) is adapted to the plug block (8).

3. A leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 2, characterized in that: The limiting member includes a plurality of clamping blocks (9), and the plurality of clamping blocks (9) are fixedly connected to the bottom end of the slide groove (4) along the axial direction. A groove (10) is provided at the bottom end of the slider (6), and one end of a limiting rod (11) is hingedly connected to the top end of the groove (10), and the other end of the limiting rod (11) contacts the clamping block (9).

4. A leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 3, characterized in that: A torsion spring (12) is provided between the limiting rod (11) and the inner wall of the groove (10), and two ends of the torsion spring (12) are fixedly connected to the limiting rod (11) and the inner wall of the groove (10) respectively.

5. The leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 2, characterized in that: A spring (13) is sleeved on the slide bar (5), and two ends of the spring (13) are fixedly connected to the two slide blocks (6) respectively.

6. The leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 1, characterized in that: The baffle (3) is a glass yarn mesh patch with an aperture of 2mm-5mm.

7. The leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 1, characterized in that: Sponge sealing strips (14) are fixedly connected to both sides of the side panels (1) and the transverse panel (2).

8. The leaf holder suitable for measuring photosynthesis of small and broken leaves in arid areas according to claim 3, characterized in that: The cross section of the clamping block (9) is a right triangle.

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