Prof. Jacob Friedman

Emeritus in Molecular Biology Ecology of Plants
ביולוגיה מול.ואקול.צמחים אמריטוס
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Prof. Jacob Friedman
Phone: 03-6409190
Fax: 03-5402855
Office: Britannia-Porter, 531


Prof. Friedman is an Emeritus Professor in TAU's Department of Molecular Biology and Ecology of Plants.  He received his M.Sc. and Ph.D. from Hebrew University after serving in the IDF from 1952-1955.  He is married to Nurit and has three children.




1959-1961  Hebrew University, Jerusalem , M.Sc. thesis : Auto-ecology of Hyparrhenia hirta (L.)

1962-1969  Hebrew University, Jerusalem , Ph.D thesis: The Role of Competition in Desert Plant Communities


Postdoctoral studies :

1969-1970 School of Plant Biology , University College of North Wales U.K. " Allelopathic potential of Elymus repens (Couch grass)" with Prof. J.L. Harper,


1970-1971 Institute for Biological and Chemical Research on Field Crops and Herbage, Wageningen, The Netherlands "Competion between two desert varieties of Medicago laciniata " with Prof. C.T. de Wit



Research grants abroad:

1980-2 Visiting Associated Professor, Dept. of Biochemistry Oklahoma State University, , Stillwater OK, US, Studying: "Avoidance of caffeine auto-toxicity in germinating coffee beans"


1982 A 45 day study tour and presentations : "Phytotoxins, storage and Avoidance of Autotoxicity" in phyto-chemical centers: UBC, Vancouver, Canada; OSU, Stillwater Oklanoma, USA and Saltio, Mexico.


1986-7 Visiting Professor with Prof. Dave Perry Dept. of Forest Science, OSU, Corvallis OR, US The role of actinomycetes in early degeneration of replanted Douglus Fir ( Pseudotsuga menziesii (Mirb.) Franco) in the Siskiyou Mountains ,S. Oregon, US,



Academic Teaching and Research: 

2001-2 A visiting Professor in Missouri Botanical Garden

2002      A Visiting Professor at the Dept. of Botany, University of Otago, Dunedin NZ

1991      Full Professor , Dept. of Botany, Tel Aviv University

1986/7   A Visiting Professor, with Prof. D. Perry, Forest Lab. , Oregon State University, Corvallis, Oregon, U.S.

1980-2   A visiting Associated Professor, With Prof. G.R. Waller, Dept. of  Biochemistry,      Oklahoma State University. Stillwater, OK, U.S.

1976      Senior Lecturer , Dept. of Botany, Tel Aviv University

1971-5    Lecturer, , Dept. of Botany, Tel Aviv University

1964-9   Instructor , Dept. of Botany, Tel Aviv University

1961-    Assistant, Dept. of Botany, Tel Aviv University



Expeditions overseas

  • Heading two Biological Expeditions to study traditional medicine in Eastern Ecuador 1. Along the Aguarico River 24/2/1990-14/3/90, with Dr. Z. Shapira and 2. Along the Napo River with Mrs.Paulina Mendosa 3.8-3.9.1990.
  • Studying allelopathy in coffee plantations, Xalapa, Mexico, with Prof. G.R. Waller, Oklahoma State University, and Ana Louisa Anaya UNAM, 1981.
  • Pollination biology of Ficus sycomorus in Kenya with Prof. J. Galil and D. Eizikowitz (1968)
  • A field study tour in West Africa (Spanish Sahara, Niger, Ghana, Nigeria) With Prof. Y. Waisel (1966) .
  • A field studies in East Africa with Prof. J. Galil, Prof. D. Eizikowitz and Mr. U. Murder (1964)
  • Plant collection team in East Africa, with Prof. M. Zohary and Prof. H. Mendelsshon (1963


Selected Publications


Palevitch,D. ,Yaniv. Zohara, A. Dafni, J. Friedman. The indigenous flora of Israel as a source for medicines- a field survey, pp. 232. (in Hebrew) National Council for Research and Development, Jerusalem, 1985.



Selected Articles in Reviewed Journals 

Gross, Michal Efraim Lewinsohn, Yaakov Tadmor, Einat Bar, Nativ Dudai, Yael Cohen, and Jacob Friedman(2009). The inheritance of volatile phenylpropens in bitter fennel ( Foeniculum vulgare Mill. var. vulgare , Apiaceae).chemotypes and their distribution within the plant. Biochemical Systematics and Ecology, 37:308-316 .


Gross, Michal Daniel, M. Joel, Yael Cohen, Einat Bar, Jacob Friedman and E Lewinsohn, (2006). Ontogenesis of mericarps of bitter fennel ( Foeniculum vulgare Mill. var. vulgare , (Apiaceae) as related to t -anethole accumulation . Israel J. Plant Science 54:309-316.


Gross, Michal Friedman, J., Dudai, N. Larkov, O., Cohen Y., Bar, E., Ravid, U., Putievsky E. and Lewinsohn, E. (2002) Biosynthesis of estragole and t -anethole in bitter fennel ( Foeniculum vulgare Mill. var. vulgare ) chemotypes. Changes in SAM:phenylpropene O -methyltransferase activities during development. Plant Science 163(6): 1047-1063


Barazani, O ., Y. Cohen, A.Fait, S. Diminshtein, N.Dudai, U. Ravid E. Putievsky and J. Friedman (2002). Chemotypic differentiation in indigenous populations of Foeniculum vulgare var. vulgare in Israel. Biochem. Systematics and Ecology 30:721-731.


Izhaki, I ., E.Tsahar, I. Paluy and J. Friedman (2002). Within population variation in Rhamnus alaternus fruits. New Phytologist 156:217-223.


Barazani O . and J. Friedman (2001). Allelopathic Bacteria and their impact on higher plants. Critical Reviews in Microbiology 27(1): 41-55 .


Barazani, O ., A. Fait,Y.Cohen, S. Diminshtein,U. Ravid, E. Putievsky, E. Lewinshon, J. Friedman (1999). Chemical variation among indigenous populations of Foeniculum vulgare var. vulgare in Israel. Planta Medica 65 (5) : 486-489.


Barazani O . and J. Friedman (1999). Allelopathic bacteria and their impact on higher plants. Critical Reviews in Plant Science 18 (6): 741-755.


Shapira, Z ., J. Terkel, J. Egozi, A. Nyska and J. Friedman (1990). Reduction of rodent fertility by plant consumption: with particular reference to Ziziphus spina-christi . J. Chemical Ecology , 16: 2019-2026.


Friedman, J ., A. Hutchins, C.Y. Li and D.A. Perry (1989). Actinomycetes inducing phytotoxic or fungistatic activity in Douglas-fir forest and in an adjacent area of repeated regeneration failure in Southwestern Oregon. Biologia Plantarum , 31(6): 487-495.


Ashkenazy, D ., A. Eshel, Y. Kashman and J. Friedman (1987). Morphological and chemical variations in natural populations of Pituranthos triradiatus in the Negev Desert. Biochem. Syst. & Ecol . 15(4) 453-458.


Palevitch, D ., Z. Yaniv, A. Dafni, J. Friedman (1986). Medicinal plants of Israel: an ethnobotanical survey. Herbs, Spices and Medicinal Plants . 1: 281-345.


Brener, S ., and J. Friedman (1985). Phytophotodermatits induced by Ruta chalpensis L. Contact Dermantits 12(4): 230-232.


Ashkenazy, D .Y. Kashman, A. Nyska. J. Friedman (1985). Furocoumarins in shoots of Pituranthos triradiatus(Umbelliferae) as protectants against grazing by Hyrax (Procavidea: Procavia capensis syriaca ). J. Chem. Ecol. 11(2): 231-239.


Friedman, J ., G.R. Waller (1985). Allelopathy and autotoxicity. Trends in Biochemical Science (TIBS), 10(2): 47-50.


Ashkenazy, D ., J. Friedman, Y. Kashman, M.N. Egyed, A. Shlosberg, A. Nyska (1984). Photosensitization in ducklings induced by Pituranthos triradiatus . Vet. & Hum. Toxicol. 26(2): 118-120.


Friedman, J ., G.R. Waller (1983). Caffeine hazards and their prevention in germinating seeds of coffee ( Coffea arabica L.). J. Chemical Ecology 9: 1099-1106.


Friedman, J ., G.R. Waller (1983). Seeds as allelopathic agents. J. Chemical Ecology 9: 1107-1117.


Friedman, J ., E. Rushkin, G.R. Waller (1982). Highly potent germination inhibitors in the aqueous eluate of fruits of Bishop's weed ( Ammi majus L.) and avoidance of autoinhibition. J. Chemical Ecology 8: 55-65.


Friedman, J ., Z. Stein, E. Rushkin (1981). Drought tolerance of germinating seeds and young seedlings of Anastatica hierochuntica L. Oecologia (Berl) 51: 400-403.


Friedman, J ., Z. Stein (1980). The influence of seed dispersal mechanisms on the dispersion of Anastatica hierochuntica (Cruciferae) in the Negev desert of Israel . J. Ecol . 68: 43-50.


Friedman, J ., N. Gunderman, M. Ellis (1978). Water response of hygrochastic skeletons of the True Rose of Jericho (Anastatica hierochuntica L.). Oecologia (Berl.), 32: 289-301.


Friedman, J ., G. Orshan, Y. Zieger-cfir (1977). Suppression of annuals by Artemisia herba-alba Asso. in the Negev desert of Israel . J. Ecol . 65: 413-426.


Friedman, J ., G. Orshan (1975). The distribution emergence and survival of seedlings of Artemisia herba-alba Asso. in the Negev desert of Israel in relation to distance from the adult plants . J. Ecol . 63(2): 627-632.


Friedman, J ., G. Orshan (1974). Allopatric distribution of two varieties of Medicago laciniata (L.) Mill. in the Negev desert of Israel. J. Ecol . 62: 107-114.


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