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שלח באימייל הדפס
Name: Haya Friedman, Ph.D. (Researcher)
Units: Postharvest and Food SciencesPostharvest Science of Fresh Produce
Research Interests / Job description  Latest Chapters In Blog
Tel:  03-9683618 03-9683624
Cell: 050-6220624
Email:    hayafr@volcani.agri.gov.il
Office location:Volcani, Bet Dagan
Address:Department of Postharvest Science of Fresh products,
Volcani Center-Agricultural Research Organization
P.O. Box 6, 50250 Bet Dagan Israel
  • Research Scientist
Research Interests / Job description
• Mechanisms of senescence induction
• Elucidating the role of reactive oxygen species in senescence and ripening
• Involvement of development pathway in ripening of fleshy fruit
• Delaying banana ripening by manipulation of MADS-box gene
• Delaying leaf senescence of Pelargonium leaves
• Postharvest of cuttings
• Edible flowers: development and postharvest treatments


Academic Background

1973-1976       B.Sc. in Life Sciences, Tel Aviv University, Tel  Aviv, Israel.

1977-1980       M.Sc. in Life Sciences (Cell Biology) at The Feinberg Graduate School of the Weizmann Institute of Science, Rehovot, Israel.

1983-1988       Ph.D. in Ornamental Horticulture, Faculty of Agriculture, The Hebrew University of Jerusalem, Rehovot, Israel.

Previous Research Experience

1989-1995       Postdoctoral position at the Department of Biology, Yale University, New Haven, CT, USA. with Prof. Michael Snyder. Research subjects: The Involvement of Protein Degradation in Nuclear Division; Isolation of EGTA-Sensitive Mutants of Yeast.

Academic Positions

1995-1999       Research Scientist at the ARO, The Volcani Center, Institute for Technology and Storage, Department of Postharvest Science of Fresh Produce.

1999-2000       Research Scientist at the Department of Horticulture, Faculty of Agriculture, Hebrew University of Jerusalem.

2001-                Research scientist at the ARO, The Volcani Center, Institute for Technology and Storage, Department of Postharvest Science of Fresh Produce. Major research interest: Senescence and reactive oxygen species; Biochemical and physiological aspects of senescence and ripening. 



List of Publications



Ignat, T., Lurie, S. Nyasordzi, J., Ostrovsky, V., Egozi, H., Hoffman, A., Friedman, H., Weksler A., Schmilovitch, Z. (2014). Forecast of apple internal quality indices at harvest and during storage by VIS-NIR spectroscopy. Food Bioprocess Technol DOI 10.1007/s11947-014-1297-7.

Biton, E., Kobiler, I., Feygenberg, O., Yaari, M., Friedman, H., Prusky, D. (2014). Control of alternaria black spot in persimmon fruit by a mixture of gibberellin and benzyl adenine, and its mode of action. Post. Biol. Technol. 94: 82-88.

Biton, E., Kobiler, I., Feygenberg, O., Yaari, M., Kaplunov, T., Ackerman, M., Friedman, H., Prusky, D. (2014). The mechanism of differential susceptibility to alternaria black spot, caused by Alternaria alternata, of stem- and bottom-end tissues of persimmon fruit. Post. Biol. Technol., 94: 74-81.

Alsharafa, K., Vogel, M.O., Oelze, M-L., Moore, M., Stingl, N., König, K., Friedman, H., Mueller, M.J., Dietz, K-J. (2014). Kinetics of retrograde signalling initiation in the high light response of Arabidopsis thaliana. Phil. Trans. R. Soc. B 369: 1471-2970.

Rosenwasser, S., Fluhr, R., Joshi, J. R., Leviatan, N., Sela, N. Hetzroni, A. and Friedman, H. (2013). ROSMETER: A bioinformatic tool for the identificationof transcriptomic imprints related to reactive oxygen species type and origin provides new insights into stress responses. Plant Physiol. 163: 1071-1083.

Nysordzi, J., Friedman, H., Schmilovitch, Z., Ignat, T., Weksler, A., Rot, I. and Lurie, S. (2013). Utilizing the IAD index to determine internal quality attributes of apples at harvest and after storage. Post Biol Technol. 77: 80-86.

Lurie,S., Friedman, H., Weksler, A., Dagar, A. and Zerbini, P. E. (2013).

             Maturity assessment at harvest and prediction of softening in an early and late  season melting peach. Post Biol Technol. 76: 10-16.

Dagar, A., Marti Ibanez, C., Pons Puig, C., Granell, A., Zilotto, F., Bonghi, C., Crisosto, C.H., Friedman, H. And Lurie, S. (2012). Comparative transcript profiling of a peach and its nectarine mutant at harvest reveals differences in gene expression

             related to storability. Tree Genetics Genomics. DOI 10.1007/s11295-012-0549-9.

Dagar, A., Weksler, A., Friedman, H. and Lurie, S. (2012). Gibberellic acid (GA3) application at the end of pit hardening: Effect on ripening and storage of two  harvests of ‘September Snow' peach. ScientiaHort.. 140: 125-130.

Hershkovitz, V., Friedman, H. Goldschmidt, E. E., Feygenberg, O., Pesis, E. (2011).  Effect of seed on ripening-control components during avocado fruit development.  J. Plant Physiol. 168: 2177-2183.

Zhang, Z., Friedman, H., Meir, S., Belausov, E.,  and Philosoph Hadas, S. (2011).  Actomyosin mediates gravisensing and early transduction events in reoriented cut snapdragon spikes. J. Plant Physiol. 168: 1176-1183.

Rosenwasser, S., Rot, I., Sollner, E., Meyer, A. J., Smith, Y., Fluhr, R., Leviatan, N. and  Friedman, H. (2011). Organelles contribute differentially to ROS-related events during extended darkness. Plant Physiol. 156: 185-201.      

Dagar, A., Weksler, A., Friedman, H., Ogundiwin, E.A., Crisosto, C.H., Ahmad, R. and  Lurie, S. (2011). Comparing ripening and storage characteristics of 'Oded' peach and its nectarine mutant 'Yuval'. Postharvest Biol. Technol. 60: 1-6.

Dagar, A., Friedman, H. and Lurie, S. (2010). Thaumatin-like proteins and their possible  role in protection against chilling injury in peach fruit. Postharvest  Biol. Technol.  57: 77-85.

Rosenwasser, S., Belausov, E., Riov, J., Holdengreber, V. and Friedman, H. (2010). Gibberellic Acid (GA3) inhibits ROS increase in chloroplasts during dark-induced senescence of Pelargonium cuttings. J. Plant Growth Regul. 29: 375-384.

Rot, I. and Friedman, H. (2010). Desiccation-induced reduction in water uptake of  gypsophila florets and its amelioration. Postharvest Biol. Technol. 57: 189-195.

Elitzur, T., Vrebalov, J., Giovannoni, J.J., Goldschmidt, E.E. and Friedman, H.

          (2010). The regulation of MADS-box genes expression during ripening of banana and their regulatory interaction with ethylene. J. Exp. Bot.  61: 1523-1535.

Rosenwasser, S., Rot, I., Meyer, A. J., Feldman, L., Jiang, K. and Friedman, H.  (2010). A fluorometer-based method for monitoring oxidation of redox-sensitive GFP (roGFP) during development and extended dark stress. Physiol. Plant. 138: 493-502.

Friedman, H., Agami, O., Vinokur, Y., Droby, S., Cohen, L., Refaeli, G. N.,

          Resnick and Umiel, N. (2010). Characterization of yield, sensitivity to Botrytis cinerea and antioxidant content of several rose species selected as edible flowers. Sci. Hortic. 123: 395-401.

Hershkovitz, V., Friedman, H., Goldschmidt, E.E. and Pesis, E. (2010). Ethylene regulation of avocado ripening differs between seeded and seedless fruit.

            Postharvest Biol. Technol. 56: 138-146.

Hershkovitz, V., Friedman, H., Goldschmidt, E. E. and Pesis, E. (2009). Induction of ethylene in avocado fruit in response to chilling stress on tree. J. Plant Physiol. 166:1855-1862.

Hershkovitz, V., Friedman, H., Goldschmidt, E. E. and Pesis, E. (2009).             The role of the embryo and ethylene in avocado fruit mesocarp discoloration. J. Exp. Bot. 60:791-799.

Bernstein, N., Friedman, H., Rot I., Bartal, A., Snir, P. and Guetsky, R. (2008).

          Monitoring of bacterial populations in agricultural greenhouse production system irrigated with reclaimed wastewater.     J. Hort. Sci. &  Biotech. 83: 821-827.

Zhang, Z., Friedman, H., Meir, S. Rosenberger, I., Halevy, A.H. and Philosoph Hadas,S. (2008). Microtubule reorientation in shoots precedes bending during the gravitropic response of cut snapdragon spikes. J Plant Physiol. 165: 289-296.



Vinokur, Y., Rodov, V., Reznick, N., Rot, I., Goldman, G., Horev, B., Umiel, N. and Friedman, H. (2006). Rose petal tea as an antioxidant-rich beverage: cultivar variability. J. Food Sci. 71: S42-S47.

Rosenvasser, S., Mayak, S. and Friedman, H. (2006). Increase in reactive oxygen species (ROS) and in senescence-associated gene transcript (SAG) levels during dark-induced senescence of Pelargonium cuttings and the effect of gibberellic acid. Plant Sci. 170: 873-879.

Friedman, H., and Rot, I. (2006). Characterization of chilling injury in Heliotropium arborescens and Lantana camara cuttings. Post. Biol. Tec. 40: 244-249.

Woltering, E. J., Balk, P. A., Nijenhuis-de Vries, M. A., Faivre, M., Ruys, G. Somhorst, D., Philosoph-Hadas, S., Friedman, H. (2004). A tissue-specific auxin-responsive 1-aminocyclopropane-1-carboxylate synthase is responsible for differential ethylene production in gravistimulated Antirrhinum majus L. flower stem. Planta 220: 403-413.

Friedman H., Meir, S., Halevy, A.H. and Philosoph-Hadas, S. (2003). Inhibition of the gravitropic bending response of flowering shoots by salicylic acid. Plant Science. 165: 905-911.

Friedman, H., Meir, S., Halevy, A.H. and Philosoph-Hadas, S. (2003). Characterization of the asymmetric growth of gravistimulated snapdragon spikes by stem and cell dimension analyses. Amer J Bot. 90(6):849-856.

Friedman, H., Meir, S. Halevy, A.H. and Philosoph-Hadas, S. (2003). The involvement of the actin-cytoskeleton network in early events of the gravitropic response of snapdragon flowering shoots. Planta. 216: 1034-1042.

Friedman, H., Hagiladi, A., Reznik. N., Barak, A. and Umiel, N. (2001). Ethylene-insensitive related phenotypes exist naturally in a genetically variable population of Dianthus barbatus. Theor. App. Gene. 103: 282-287.


Prior to 2000

Friedman, H., Halevy, A.H., Rosenberger, I., Meir, S. Kaufman, P.B. and Philosoph-Hadas, S. (1998). Inhibition of the gravitropic response of Snapdragon spikes by the calcium channel blocker, lanthanum chloride. Plant Physiol. 118: 483-492.

Friedman, H. and Snyder, M. (1994). Mutations in PRG1, a yeast proteasome-related gene, cause defects in nuclear division and are suppressed by deletion of a mitotic cyclin gene. Proc. Natl. Acad. Sci USA 91: 2031-2035.

Friedman, H., Goebel, M. and Snyder, M. (1992). A homolog of the proteasome-related RING10 gene is essential for cell growth in yeast. Gene 122: 203-206

Friedman, H., Goldschmidt, E.E., Spiegelstein, H. and Halevy, A.H. (1992). A rhythm in the flowering response of photoperiodically-induced Pharbitis nil to agents affecting cytosolic calcium and pH. Physiol. Plant. 85: 57-60.

Friedman, H., Spiegelstein, H., Goldschmidt, E.E. and Halevy, A.H. (1990). Flowering response of Pharbitis nil to agents affecting cytoplasmic pH. Plant Physiol. 94: 114-119.


Articles in Hebrew


Lurie, S., Wexler, A. and Friedman, H. (2012).

             Spectral non-destructable measuremnt to determine the harvest time in Starking apple. Alon Hanotea 66: 34-37.

Wexler, A., Lurie, S., Rot, I., Voet, H. and Friedman, H. (2012).

             Non-destructable spectral measuremnt for evaluation of rate of softening in peaches.

             Alon Hanotea 66: 16-19.

Hershkovitz, V., Ben Arie, R., Fienberg, O., Friedman, H., and Pesis, E. (2010).

             In-orchard chilling stress and its effect on avocado fruit riping in `Arad`.

             Alon Hanotea 64: 38-42.

Friedman, H., Resnick, N., Agami, O., Rot, I., Hagiladi A., and Umiel, N. (2007). Roses as edible flowers: Steps in development of fresh crop. Olam Haperach: Feb-March: 54-56.

Rosenberger, I., Friedman, H., Meir, S., and Philosoph-Hadas, S. (2007). Philodendron Xanadu leaves: are they suitable for sea transport? Olam Haperach: April-May: 58-61.

Rot, I., Haddad, S., Spiegel, E., Rosenvasser, S. and Friedman, H. (2006). Treatments for preventing yellowing and decay developed during storage of Pelargonium cuttings. Olam Haperach: July: 46-49.

Rot, I., Friedman, H. (2006). Characterization of damage in Echinops flowering stalks during vase life and development of treatments for its prevention. Olam Haperach: Dec-Jan: 58-60.


Improving cuttings quality
Export of cutting from Israel encompassing a large section of ornamental export. During storage and export rooted and non-rooted cuttings experience stresses of continuous darkness and cold leading either to senescence or chilling injury. In our lab we develop knowledge-based treatments to improve cuttings quality.
ROSMETER: A new bioinformatic tool
Oxidative stress in different organelles lead to a different transcriptomic imprint. We developed a new bioinformatic tool, ROSMETER, that is able to identify the ROS-related transcriptome signature related to stresses in different organelles.
Reactive oxygen species (ROS) in senescnece
Senescence process has implication to the global food crises, since it affects yield and shelflife maintenance of fruit and leaves after harvest. Senescence is a regulated process in which ROS production and oxidative stress play a major role. Our goal is to characterize the ROS response and to elucidate the role of ROS in senescence.
Fruit Ripening
Fruit ripening involves physiological and biological changes like softening, color change, flavor, and resistance to pathogen. This process is controlled by transcription factors and in few fruits also by ethylene. We are studying the mechanism of fruit development and ripening for improving fruit quality and shelflife.
See all chapters
Updated on: 19/08/18 12:07
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