JP2002104905A - Method for increasing live weight of melon fruit and sugar content by using plant hormone preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for increasing the live weight of a melon fruit and a sugar content. SOLUTION: The live weight and the accumulation of sucrose of a melon fruit is increased by treating the fruit with p-chlorophenoxyacetic acid (p-CPA), a synthetic auxin agent, before the rapid growth period of the fruit and beginning of the accumulation of sucrose. Further, even when the same treatment is applied to the fruit, the sucrose content is increased. The method for treating the fruit is to apply a 100 ppm p-CPA solution to the fruit before the rapid growth period (e.g. 10 days after blooming) and before beginning of the accumulation of sucrose (e.g. 25 days after blooming).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a phytohormonal agent (synthetic auxin) during the fruit development period after flowering of melon.
The present invention relates to a method for increasing the living weight and sugar content of melon fruit by the treatment of melon, and to improve the yield and quality of the fruit.

[0002]

BACKGROUND OF THE INVENTION For fruit set and development of melon fruit,
Usually, artificial pollination is carried out by visiting insects or manually.
At this time, if pollination and fertilization are not performed sufficiently, fruit enlargement and sugar accumulation decrease. Also, the fruit sugar content of melon is
It is also susceptible to the cultivation environment after pollination and fertilization, and changes in the environment significantly reduce sugar accumulation.

[0003]

If the pollination and fertilization are not carried out sufficiently, the fruit will enlarge and the sugar accumulation will decrease. In particular, it is likely to occur in winter cultivation using fruiting agents. In addition, even if pollination and fertilization are performed sufficiently, the fruit sugar content of melon is easily affected by the cultivation environment such as low sunshine and low temperature after pollination and fertilization, and sufficient sugar accumulation is not performed due to environmental changes. .
The present invention improves sugar storage in melon fruits due to the above factors, and also increases the sugar content of fruits that are sufficiently pollinated and fertilized to develop normally, thereby producing high-quality melon. It is to try to make it.

[0004]

SUMMARY OF THE INVENTION The rapid development of melon parthenocarpic fruits and before the onset of sucrose accumulation, the synthetic auxin phytohormone p-chloropheno.
When xyacetic acid (p-CPA) is treated, the fresh weight and sugar accumulation of the fruit increase. Furthermore, even when fruits that have been sufficiently pollinated and fertilized and are normally grown are subjected to the same treatment, the sucrose content is further increased. In the treatment method, 100 ppm p-CPA solution is applied to fruits at the time of rapid development of the fruits (for example, 10 days after flowering) and before the onset of sucrose accumulation (for example, 25 days after flowering).

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples. Example 1 As a test material, a plant-crossed summer ALS-melon was used. Cultivation was performed from May 10, 1999 to August 27, 1999.
Fertilization, irrigation and spraying of pesticides were carried out in a melon cultivation style in accordance with the conventional method. The treatment areas are as shown in Table 1. The emasculated flower was bagged with the emasculated flower the day before flowering, and the bag was removed three days after flowering. The phytohormones used for the treatment were 1- (2
-Chloro-4-pyridyl) -3-phen
Y-urea (CPPU) was used to examine the effect of increasing fruit fresh weight and sugar content on p-CPA. Each hormonal preparation was sprayed on the ovary or fruit. Table 1 shows the experimental treatment, the fresh weight of the harvested fruit and the pulp hardness. From the comparison between P and PC ward, C at the time of flowering
The PPU treatment did not affect the fresh weight and pulp firmness of the harvested fruits, and the decrease in live weight of the parthenocarpic fruit in section C was CPPU
Was not a factor, but the presence or absence of seeds was determined to have greatly affected. From the comparison of a series of CA treatment sections and C section, p-CP
It became clear that the A treatment had the effect of increasing the live weight of the parthenogenetic result. From the comparison of CAS, CAM and CAL sections, the most effective treatment concentration of p-CPA in the effect was 500 ppm treatment concentration. However, at 500 ppm, the flesh softened remarkably, and 100 ppm
Before and after was determined to be optimal. As for the optimal treatment time of p-CPA, from the comparison of CA5, CA10, CA25 and CA40, CA10, that is, 10 days after flowering, was most effective. Table 2 shows the effect of p-CPA on the accumulation of sucrose, glucose and fructose, which are the main sugars of melon fruit. From the comparison between P and PC ward, CPP at the time of flowering
U treatment did not affect the sugar content of the harvested fruits, and the decrease in the sugar content of the parthenocarpic fruit in section C was It was determined that the CPPU treatment was not a factor and the presence or absence of seeds had a significant effect. Comparison of the CA-treated and C-treated plots revealed that p-CPA treatment had the effect of increasing the sucrose content of the parthenocarpic fruit. As the optimum treatment concentration of p-CPA in the effect, the treatment concentration of 100 ppm was most effective from the comparison between the CAS, CAM and CAL sections. The optimal processing time of p-CPA is CA5, CA
10, CA25 and CA40 compared to CA25
The treatment on the plot, 25 days after flowering before the start of sucrose accumulation, was most effective. Even when the artificially pollinated fruit was treated with p-CPA, the P and PA sections revealed that p-CPA significantly increased the sucrose content of the treated fruit as compared to the artificially pollinated fruit. It was also found that the two treatments on the 10th and 25th days after the flowering were more effective than the one treatment with p-CPA.
From the above examples, the synthetic auxin p-C of the present invention was obtained.
The method of increasing the fresh weight and sugar content of melon fruits by PA treatment is extremely effective in increasing the yield and sugar content of melon, and is highly practical.

[0006]

According to the present invention, the sugar content of melon fruits is increased, and the fluctuation of the sugar content between fruits is reduced. Producers can easily produce high-sugar melon easily and uniformly, and consumers can purchase quality-friendly (delicious) melon, which will lead to an increase in demand for melon.

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Claims (1)

[Claims] A method of increasing the fresh weight and sugar content of fruits by treating phytohormones (synthetic auxins) during the fruit development period after flowering of melon