Novel melon plants

Inactive Publication Date: 2005-07-14
SYNGENTA PARTICIPATIONS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0038] The present invention thus provides melon fruits offering a pleasant acid component but avoiding an astringent taste. This enhances or complements melon flavors to their maximum potential. These combinations of organic acid content and

Problems solved by technology

These fruits are generally not edible in fresh consumption without dressing or cooking and, in some cases, they are even bitter.
This melon variety also involves poor fruit traits such as very mealy, non-aromatic and non-sweet flesh, very

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Melon Extracts

[0193] A wedge of ca. 400 g was taken from a melon fruit, the seeds and the skin (1 cm thickness) were removed. The flesh was cut in small parts, which were blended for 30 seconds in a Warring blender until a smooth slurry was obtained. The slurry was filtrated over a Whatman paper filter, the juice centrifugated in an Eppendorf centrifuge at 10.000 g and stored at −20 degrees Celcius.

example 2

Determination of Citric Acid Content

[0194] Samples as prepared in Example 1 were incubated with citrate lyase (CL) to convert citric acid to oxaloactate and acetate. In the presence of the enzymes malate dehydrogenase (MDH) and lactate dehydrogenase (LDH), oxaloacetate and its decarboxylated derivative pyruvate were reduced with NADH to respectively L-malate and L-lactate. The decrease of NADH is proportional with the quantity of citric acid in the sample and can be determined at 340 nm. The assay was conducted in microplates. 20 μl of diluted sample was added to a microtiterplate. 200 μl of assay mixture containing NADH, MDH and LDH was added and mixed to the plate. The reaction was started with 15 μl of start-solution containing CL. The plate was mixed and let the reaction proceed for 1 hour. Absorbance values were measured at 340 nm with a microtiterplate reader (Biotek EL808 reader with KCJunior software and computer). A calibration curve was used to calculate the concentratio...

example 3

Determination of Malic Acid Content

[0195] Samples as prepared in Example 1 were incubated with L-malate dehydrogenase (MDH) and NAD+ to convert L-malate to oxaloacetate. The equilibrium of the reaction is on the side of malate but was forced to the side of oxaloacetate with hydrazine by means of derivatization. NADH formed during the assay is proportional with the malic acid content in the samples. NADH can be determined at 340 nm as a measure for malic acid. The assay was conducted in microplates. 20 μl of diluted sample was added to a microtiterplate. The reaction was started by adding 200 μl of assay mixture containing hydrazine, MDH and NAD+ at pH 10. The plate was mixed and the reaction was allowed to proceed for 1 hour. Absorbance values were measured at 340 nm with a microtiterplate reader (Biotek EL808 reader with KCJunior software and computer). A calibration curve was used to calculate the concentration malic acid in the samples. MDH was purchased from Roche Diagnostics....

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Abstract

The present invention relates to novel plants, in particular to melon plants capable of producing fruits with a new pleasant taste and to seeds thereof. The present invention further relates to fruits of melon plants of the present invention, wherein such fruits have organic acid content, low pH and high sugar contents. The present invention further relates to methods of making and using plants and fruits disclosed herein.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of U.S. Provisional Application No. 60 / 535,631, filed Jan. 9, 2004. The above application is incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates to novel plants, in particular to melon plants capable of producing fruits with a new pleasant taste. In particular, the fruits of the melon plants of the present invention have altered organic acid contents, lower pH when compared to current commercial sweet melon fruits, and high sugar contents. BACKGROUND OF THE INVENTION [0003] Melon (Cucumis melo L.) is a commercial crop grown worldwide. Cucumis melo is a member of the family Cucurbitaceae. The Cucurbitaceae comprises about 90 genera and 700 to 760 species, mostly of the tropics. The family includes pumpkins, squashes, gourds, watermelon, loofah and several weeds. Cucumis melo L. includes a very wide variety of cultivars producing fruits of different shape, extern...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H5/08A23L19/00A23L29/20C12N15/82
CPCA01H1/04C12N15/8245A23L1/212A01H5/08A23L19/00A01H1/045A01H6/344
Inventor ALVAREZ CASANUEVA, JOSEFONCELLE, BRUNONICOLET, JEAN LOUISVAN DOORN, JOHANNESOLIVER SEROS, MARC
Owner SYNGENTA PARTICIPATIONS AG
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