Dept. of Postharvest
Science of Fresh Produce
Agricultural Research Organization,
The Volcani Center,
P.O.Box 6, Bet Dagan 50250, Israel
Research
Interests
Elucidating the role of gibberellins in inhibiting leaf senescence
Developmental processes involved in fruit ripening and senescence
Molecular mechanisms of flower senescence in ethylene-insensitive flowers
Perception and transduction mechanisms of gravistimulation in flowering
shoots
Recent
Publications
Philosoph-Hadas, S., Friedman H., Meir, S., Berkovitz-SimanTov, R., Rosenberger,
I., Halevy, A., Kaufman, P.B., Balk, P. and Woltering, E.J.(2001). Gravitropism
in cut flowering stalks of snapdragon. Advances in Space Research 27(5):
921-932.
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.
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., 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. American J Botany 90(6):849-856.
Friedman, H. and Rot, I. (2003). Monitoring the temperature in various packages
used by the cutting industry. Olam Porech 24: 46-48 (Reviewed In Hebrew).
Friedman, H., Meir, S. Philosoph-Hadas, S. and Halevy, A.H. (2003). Effect
of octanoic acid on ethylene-mediated processes in Arabidopsis. Plant growth
Regul. 40: 239-247.
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.
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 (in press).
Current
Projects
The involvement of gibberellin-induced genes in suppressing senescence processes
in Pelargonium cuttings.
Effect of Gibberellin on senescence-associated transcription factors.
Implementation of practical methods to prevent senescence of Pelargonium
cuttings.
Isolation of RIN homologs from banana.
Identification of RIN substrates in banana.
Cloning of senescence-associated genes from the ethylene insensitive flower
Narcissus.