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Goren Raphael (Raffi)
Born 1931, Tel Aviv
Ph.D. 1963, Hebrew Univ.;
Lect. 1966; Sen. Lect.
1969;
Assoc. Prof. 1974; Prof. 1978;
Dean, Faculty of Agriculture;
Emeritus 2000.
E-mail:rgoren@agri.huji.ac.il
Tel: 972-8-948-9348
Fax:972-8-948-9574
Research Interests:
Mode of action of growth regulators in the control of citrus leaf and
fruit abscission, with special emphasis on the role of auxin metabolism
and translocation in relation to ethylene effects. Auxin catabolism in
relation to ethylene effect and tissue sensitivity. Ethylene
biosynthesis and action in relation to abscission, senescence, fruit
maturity and postharvest behaviour, ethylene perception and signal
translocation at the genome levels. Identification of ERS gene in
citrus fruit. Flowering and fruiting in citrus as affected by exogenous
hormones. Carbohydrate metabolism in relation to fruit development and
maturity. Molecular aspects of sucrose glycolysis and gluconeogenesis.
Research Projects:
Funding MOARD:
a. Examining ohysiological-biochemical parameters to
assess the activity of naphthaleneacetic acid in fruitlets thinning in
various citrus orchards;
b. Genetic and physiological control of sugar
accumulation in citrus;
c. Evaluation of the inconsistency of
biological action of auxins used in citrus orchards to increase fruit
size;
d. Expression of pyrophsphate-fosphofructokinase (PFP) in citrus
fruit, and its functional expression in human cells. Cloning and
characterization of ppi-phosphofructukinase: A key enzyme in sugar
metabolism in citrus fruit;
e. Effect of ethylene and
1-methylcyclopropene on the postharvest qualities of 'Shamouti'
oranges.
Transport, metabolism and accumulation of sucrose and hexoses into the
vacuole of citrus juice cells. Effects of ethylene on
Mitogen-Activated-Protein kinase in citrus tissues. Physiological and
molecular characterization of the auxin-ethylene interaction in
abscission layers of Red Cestrum cut flowers.
Funding BARD:
Development
of novel ethylene antagonists for the control of production process in
agricultural crops.
Note: MOARD = Ministry of Agriculture and Rural Development. BARD
= Bi-national Israel- United States Agricultural Research and
Development.
Abstracts of Current Research
Characterization of ethylene-induced genes (7), Identification the
ethylene receptor ERS gene in citrus (1), Intracellular distribution of
Fructos-2,6-P2 in citrus juice sacs cells (2), Isolation and cloning
of the genes of the sub-units of phospofructo kinase in
grapefruit juice sacs cells as part of a study of sucrose metabolism
(4), contrary to earlier knowledge it has been found that citrus juice
cells contain the enzymatic machinery to metabolize soluble sugars and
that sucrose can serve as energy source (3), providing evidence
that ethylene-induced catabolism of Indole-3-acetic acid (IAA) is
stimulated by increased formation of H2O2 (5), 1-methylcyclopropene
(1-MCP), an ethylene antagonist, delays fruit ripening and leaf
abscission (6). Physiological and biochemical effects of girdling on
horticultural tree crops (8). Developing substituted 1-MCP agents block
ethylene action (9).
Professional affiliations
Israel society of Botany, American Society of Plant Biology, Plant
Growth Regulation Society of America, International Society of
Horticulture, International Citrus Society, Japanese Society of Plant
Physiology, Scandinavian Society of Plant Physiology, Federation of
European Plant Physiologies Societies, Sigma xi.
Honors:
1964 - Jacobs price on the topics “The development of the ‘Shamouti’
fruit and its relation to bioflavanoid content” (Ph.D Thesis). 1986 -
Honorary member of the Israeli Society of Rare Fruit trees, 1987 -
Chair: James de Rothschild Professor of Horticulture, 1993 – Fellow,
The American Society of Horticultural Science.
Representative articles
1.Li, C.Y., D. Jacob-Wilk, G.Y. Zhong, R. Goren, D. Holland. 1998. A
full-length cDNA encoding an ethylene receptor ERS homologue from
citrus. (Accession Number AF092088). Plant Physiol.118:1534.
2.Van Praag E. P. Gonzalez, A. Brune, R. Goren, U. Zehavi, E.
Echeverria. 1998. Fru-2,6-P2 and citrate: interacellular distribution
in citrus tissues and effect on grapefruit leaf PEP. Bioch. Mol. Biol.
& Mol. Biol. International. 44:117-125.
3.Goren, R., M. Huberman, U. Zehavi, M. Chen-Zion and E. Echeverria.
2000. Sugar utilization by citrus juice cells as determined by
[14C]-sucrose and [14C]-fructose feeding analyses. Plant Physiol.
Biochem. 38:507-515.
4.Kapri, R.,E. Dahan, A. Sadka, U. Zehavi and R. Goren. 2000. Cloning
and characterization of PPi-phosphofructokinase from citrus fruit. In:
Goren, R and E.E. Goldschmidt, (eds). Acta Hortic. 535:113-118.
5.Winer, L, R.Goren and J. Riov. 2000. Stimulation of the oxidative
decarboxylation of indole-3-acetic acid in citrus tissues by ethylene.
Plant Growth Regulation 32: 231-237.
6.Zhong, G.Y., M. Huberman, X. Feng, E.C. Sisiler, D. Holland, and R.
Goren, 2001. Effect of 1-methylcyclopropane on ethylene-included
abscission of citrus leaves and leaf explants. Physiol. Plant.
113:134-141.
7.Zhong, G.Y., R. Goren, J. Riov, E.C. Sisler, and D. Holland, 2001.
Characterization of an ethylene-induced esterase gene isolated from
Citrus sinensis by competitive hybridization. Physiol. Plant. 113:
267-274.
8.Goren,R., M. Huberman and E.E. Goldschmidt. 2004. Girdling:
Physiological and horticultural aspects. In Horticultural Reviews (J.
Janick, Ed) John Wiley & Sons, Inc.30:1-36
9. Sisler,E.D., T. Alwan, A, Apelbaum, Margrethe Serek and R. Goren.
(2003). 1-Substituted cyclopropenes: Effective blocking agents for the
ethylene receptor in plants. Plant Growth Regulation 40:223-228
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