Method for cut flower preservation and blooming promotion of iris gueldenstaedtia

Abstract

The invention discloses a method for preserving and promoting blooming of cut-flowers of iris gueldenstaedtia. The method comprises the following steps: harvesting when flower buds are exposed out of sheath leaves by 1-2 cm; fully absorbing water after harvesting; then putting into a low-temperature environment with the temperature of 3-5 DEG C; after refrigeration is finished, treatment is carried out, the treatment solution is 0.1 g / L IAA solution, and the treatment time is 0.5-6 h. According to the method disclosed by the invention, the cut Netherland iris flowers can be preserved for 7-10 days in a refrigeration environment, the refrigerated cut Netherland iris flowers are treated with the auxin solution, all the flowers can extend out of sheath leaves in the subsequent vase insertion process, the flowers are completely bloomed, and the ornamental value of the cut Netherland iris flowers is greatly improved compared with that of the cut Netherland iris flowers treated without the auxin solution. Therefore, the method plays an important role in prolonging the post-harvest preservation time of the iris gueldenstaedtia so as to be used for long-distance transportation or staggering the market peak and ensuring the opening effect of the iris gueldenstaedtia after refrigeration.

Description

Technical Field

[0001] The present invention belongs to the technical field of post - harvest technology of cut flowers, and particularly relates to a method for preserving and promoting the opening of cut flowers of Iris hollandica. Background Art

[0002] The bulbous flower Iris hollandica of the genus Iris in the family Iridaceae Iris × hollandica is deeply loved by consumers because of its characteristics such as straight plant type, unique flower shape, and rich flower colors. With the continuous development of the domestic flower industry, Iris hollandica, an important type of cut flower in the international fresh flower market, has gradually expanded in the domestic consumer market in recent years. In addition to its unique floral traits, the bulbs of Iris hollandica degenerate less compared to the bulbs of most other imported varieties, and can be continuously planted for many years after being introduced once, so it has broad market application prospects.

[0003] In order to extend the cut flower sales time and meet the needs of long - distance transportation, Iris hollandica cut flowers are often subjected to low - temperature treatment after harvest. However, inappropriate harvesting time and post - harvest cold storage treatment can cause the flowers to open during cold storage or the flowers cannot fully open after cold storage, resulting in the situation that they cannot be sold, which causes serious economic losses. Therefore, exploring the method for preserving and promoting the subsequent opening of Iris hollandica cut flowers is very important for improving the cut flower quality and economic value. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preserving and promoting the opening of Iris hollandica cut flowers.

[0005] It should be noted that when the present invention harvests Iris hollandica at an appropriate time and places it in a temperature - controlled environment, the cut flowers of Iris hollandica can be preserved for a relatively long time; in addition, applying an appropriate concentration of auxin solution at an appropriate time after cold storage of the cut flowers can improve the phenomenon of inhibited elongation of the cut flowers caused by cold storage, enabling the flower buds to fully extend out of the sheath leaves, improving the cut flower quality, and reducing the sales losses caused by incomplete flower opening. The research results of this invention are simple and easy to implement, and have important significance for promoting the development of the domestic Iris hollandica cut flower industry.

[0006] Based on the above purpose, the present invention adopts the following technical solutions: A method for preserving and promoting the opening of Iris hollandica cut flowers, comprising the following steps: (1) Cut flower harvesting: Harvest Iris hollandica when the flower buds show color and immediately place them in clear water; (2) Cold storage treatment: After the cut flowers of Iris hollandica are fully saturated with water, bundle them and place them in a low - temperature environment of 3 - 5°C for cold storage; (3)Treatment for promoting the opening of cut flowers after cold storage: After the cold storage ends, cut off 1 - 2 cm of the lower stem, then place it in an auxin solution of a certain concentration for treatment. After the treatment ends, take it out and rinse the part immersed in the auxin solution with clean water. After rinsing, place it in a vase for viewing.

[0007] Further, in step (1), the degree of color showing of the Dutch iris flower bud is that the petals extend 1 - 2 cm out of the sheath leaves that wrap them. If the extending length of the petals is too long, they will open during the subsequent cold storage process; if the harvesting time is too early, even if an auxin solution is applied after cold storage, they still cannot open. Therefore, the appropriate harvesting degree of the Dutch iris is very important for ensuring the quality of cut flowers after cold storage.

[0008] Optionally, in step (1), the time of placing in clean water should be ≥ 2 h to ensure that the cut flowers absorb enough water.

[0009] Optionally, in step (2), the cold storage time is 7 - 10 d.

[0010] Further, in step (3), the auxin solution and its concentration are 0.1 g / L of IAA solution.

[0011] Optionally, in step (3), the auxin treatment time is 0.5 - 6 h.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention harvests Dutch iris cut flowers at the appropriate time and places them in a suitable cold storage environment. From the harvest of cut flowers to the subsequent vase - inserted state until they open, it can last for more than 10 d. While for cut flowers directly harvested and vase - inserted, they reach the fully open state in about 2 d. This greatly extends the post - harvest storage time of Dutch iris. In addition, by selecting the appropriate treatment time and appropriate auxin concentration to treat the Dutch iris cut flowers after cold storage, it can significantly restore the phenomenon that the flower buds cannot fully extend out of the sheath leaves and cannot fully open due to cold storage, significantly improve the vase - inserted quality of Dutch iris cut flowers after cold storage and the economic value of cut flowers, and promote the development of the Dutch iris cut flower industry. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0014] Figure 1 Vase - inserted phenotypes of Dutch iris Nofa White cut flowers for control after cold storage and after auxin treatment Figure 2Phenotypes of cut flowers of refrigerated Dutch iris Nofa Blue under control and auxin treatments during vase cultivation CK: Control; T1: 0.01 g / L IAA for 0.5 h; T2: 0.01 g / L IAA for 6 h; T3: 0.01 g / L IAA for 24 h; T4: 0.1 g / L for 0.5 h; T5: 0.1 g / L IAA for 6 h; T6: 0.1 g / L IAA for 24 h. Detailed implementation manners

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] The special term "embodiment" used herein does not necessarily mean that any embodiment described as "exemplary" is better than or superior to other embodiments. For the performance index tests in the embodiments of the present application, unless otherwise specified, the conventional test methods in the art are adopted. It should be understood that the terms described in the present application are only used to describe specific embodiments and are not intended to limit the content disclosed in the present application.

[0017] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs; the test methods and technical means not specifically mentioned in the present application refer to the experimental methods and technical means commonly adopted by those of ordinary skill in the art.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "in", "on", "under", "rise", "fall", "vertical", "plane", "top", "bottom", "inside", "outside", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0019] To better illustrate the content of the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present application can be implemented without some specific details. In the embodiments, some methods, means, instruments, devices, etc. well known to those skilled in the art are not described in detail to highlight the gist of the present application.

[0020] On the premise of no conflict, the technical features disclosed in the embodiments of the present application can be combined arbitrarily, and the obtained technical solutions belong to the content disclosed in the embodiments of the present application.

[0021] It should be noted that the cut flowers of Iris × hollandica used in the following examples were collected from the Iris germplasm nursery of the Institute of Botany, Jiangsu Province, Chinese Academy of Sciences, and the test equipment was all purchased on the market or common conventional products in the laboratory.

[0022] Example 1: (1) Cut flower harvesting: When the Nofa White Iris × hollandica shows 1 - 2 cm of color, cut the flower branches at 8 - 9 am, remove the lower leaves, only leave 3 - 4 leaves, and immediately insert them into a bucket of clear water. The time interval from cutting the flower branches to putting them into the clear water bucket does not exceed 30 minutes and they are placed in the clear water for 2 hours; (2) Cold storage treatment: After the water absorption is completed, align the tops of the cut flowers, bundle 10 branches into one bunch, tie them with a rubber band at the lower 1 / 3 of the flower stem, and then put them into a freezer with the temperature set at 3 - 5°C; (3) Promotion of cut flower opening after cold storage treatment: After 7 days of cold storage treatment, take out the cut flowers, cut off 1 - 2 cm of the lower stem, and then put them into different concentrations of auxin solutions for different treatment times. The specific treatment combinations are as follows: CK: Control; T1: 0.01 g / L IAA for 0.5 h; T2: 0.01 g / L IAA for 6 h; T3: 0.01 g / L IAA for 24 h; T4: 0.1 g / L for 0.5 h; T5: 0.1 g / L IAA for 6 h; T6: 0.1 g / L IAA for 24 h.

[0023] After the treatment is completed, take them out and rinse the part immersed in the auxin solution with clear water. After rinsing, insert them into a vase for viewing.

[0024] It was found by observing the opening state of the cut flowers after inserting them into the vase for 3 days after the whole treatment: Compared with CK, for the T1 - T3 treatments, the opening states of the flowers were not much different, while for the T4 - T6 treatments, the flowers could all extend out of the sheath leaves and open completely ( Figure 1 ) Among them, the opening angle of the flowers in the T6 treatment was too large, affecting the viewing effect. Therefore, in order to promote the opening of the cut flowers of Iris × hollandica after cold storage, the treatment combinations of T4 and T5 are more appropriate.

[0025] Example 2: Similar to the steps of Example 1, the difference is that in step (1), the cut flower variety of Iris × hollandica is Nofa Blue; in step (3), the cold storage treatment time is 10 days.

[0026] After the entire treatment, the cut flowers were vase-placed for 3 days to observe the opening state. It was found that: compared with the CK, the opening states of the flowers in the T1-T3 treatments were not very different. In the T4 treatment, the flowers could almost completely extend out of the sheath leaves, while in the T5 and T6 treatments, the flowers all extended out of the sheath leaves and were fully open ( Figure 2 ). Among them, the opening angle of the flowers in the T6 treatment was too large, affecting the ornamental effect. Therefore, the treatment effects of T4 and T5 were still better.

[0027] Comparative Example 1: Steps (1) and (2) were basically similar to those in Example 1, except that the harvesting was carried out when the Nofa White Dutch iris showed a color of 3-5 cm. It was found that when refrigerated in a freezer at 3-5 °C for 2-3 days, the flowers were fully open. Too short a storage time was not conducive to subsequent sales.

[0028] Comparative Example 2: Steps (1)-(3) were basically similar to those in Example 2, except that in step (1), the harvesting was carried out when the Nofa Blue flower bud had not extended out of the sheath leaf. When observed after vase-placement for 3 days after the auxin treatment in step (3), it was found that neither the control nor the flowers in each treatment could open.

Claims

1. A method for preserving and promoting the opening of cut Dutch iris flowers, characterized in that, The method includes the following steps: (1) Cut flower harvesting: When the buds of Dutch iris show color, harvest them and immediately place them in clean water; (2) Cold storage treatment: After being saturated with water, bundle them and place them in a low-temperature environment of 3-5°C; (3) Treatment to promote cut flower opening after cold storage: Take them out after cold storage, cut off a small part of the lower stem, then place them in an auxin solution of a certain concentration for treatment. After the treatment is completed, take them out and rinse the part immersed in the auxin solution with clean water. After rinsing, place them in a vase for viewing.

2. The method for preserving and promoting the opening of cut Dutch iris flowers according to claim 1, characterized in that, The color showing of the Dutch iris buds in step (1) means that the petals expose the sheath leaves they wrap by 1-2 cm.

3. A method for preserving and promoting the opening of cut Dutch iris flowers according to claim 1, characterized in that, The concentration of the auxin solution in step (3) is 0.1 g / L of IAA solution.

4. A method for preserving and promoting the opening of cut Dutch iris flowers according to claim 1, characterized in that, The treatment time of the auxin solution in step (3) is 0.5-6 h.

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