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Metabolism of soluble sugars in developing melon fruit: a global transcriptional view of the metabolic transition to sucrose accumulation

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Abstract

The sweet melon fruit is characterized by a metabolic transition during its development that leads to extensive accumulation of the disaccharide sucrose in the mature fruit. While the biochemistry of the sugar metabolism pathway of the cucurbits has been well studied, a comprehensive analysis of the pathway at the transcriptional level allows for a global genomic view of sugar metabolism during fruit sink development. We identified 42 genes encoding the enzymatic reactions of the sugar metabolism pathway in melon. The expression pattern of the 42 genes during fruit development of the sweet melon cv Dulce was determined from a deep sequencing analysis performed by 454 pyrosequencing technology, comprising over 350,000 transcripts from four stages of developing melon fruit flesh, allowing for digital expression of the complete metabolic pathway. The results shed light on the transcriptional control of sugar metabolism in the developing sweet melon fruit, particularly the metabolic transition to sucrose accumulation, and point to a concerted metabolic transition that occurs during fruit development.

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Acknowledgments

We gratefully acknowledge financial support from of the Chief Scientist, Ministry of Agriculture; The Israel Bio-Tov Consortium and Magnet program, Israeli Ministry of Industry, Trade and Labor; Binational Agriculture Research and Development (BARD) Grant IS-2270-94 and IS-3877-06; Israel Science Foundation Grant No. 386/06; and EU project Food-2005 MetaPhor. This paper is journal series #172-10 of the Agricultural Research Organization.

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  1. Genfa Zhang

    Present address: College of Life Science, Beijing Normal University, Beijing, 100875, China

Authors and Affiliations

  1. Institute of Plant Science, Agricultural Research Organization, Bet Dagan, 50250, Israel

    Nir Dai, Shahar Cohen, Nir Carmi, Genfa Zhang, Yelena Yeselson, Marina Petreikov, Shmuel Shen, Ran Hovav, David Granot, Ron Ophir, Amir Sherman & Arthur A. Schaffer

  2. Department of Vegetable Research, Agricultural Research Organization, Newe Ya’ar Research Center, P.O. Box 1021, Ramat Yishay, 30095, Israel

    Vitaly Portnoy, Galil Tzuri, Rotem Harel-Beja, Maya Pompan-Lotan, Uzi Sahar, Efraim Lewinsohn, Yakov Tadmor, Yosef Burger & Nurit Katzir

  3. Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA

    Zhangjun Fei & Jim Giovannoni

  4. Evogene Ltd., P.O. Box 2100, Rehovot, 76121, Israel

    Alex Diber, Sarah Pollock & Hagai Karchi

  5. Department of Vegetable Research, Volcani Center-ARO, Bet Dagan, 50250, Israel

    Arthur A. Schaffer

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Dai, N., Cohen, S., Portnoy, V. et al. Metabolism of soluble sugars in developing melon fruit: a global transcriptional view of the metabolic transition to sucrose accumulation. Plant Mol Biol 76, 1–18 (2011). https://doi.org/10.1007/s11103-011-9757-1

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