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Ethylene, stress and enzymatic activities in Hevea latex: the diversity of responses


, : Ethylene, stress and enzymatic activities in Hevea latex: the diversity of responses. Cellular and molecular aspects of the plant hormone ethylene Proceedings of the International symposium on cellular and molecular aspects of biosynthesis and action of the plant hormone ethylene, Agen, France, August 31 September 4, 1992: 257-258

Ethrel (ethephon), an ethylene releaser, is used on a large scale in H. brasiliensis as a latex production stimulant. Its application before tapping causes an extension of latex flow time and activation of latex regeneration in laticiferous cells between 2 tappings. The activation is able to cause considerable and transitory modifications in the metabolism of the laticifers.

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Related references

Jacob, J.L.; Nouvel, A.; Prevot, J.C., 1978: Electrophoresis and revealing of enzymatic activities in Hevea brasiliensis latex. Electrophoresis on polyacrylamide gel revealed that latex cytoplasmic serum contained 20 enzymes and that serum S (particulate) contained 7 enzymes, 2 of which were not in the cytoplasmic serum.

Housti, F.; Coupe, M.; D'auzac, J., 1992: Effect of ethylene on enzymatic activities involved in the browning of Hevea brasiliensis callus. Browning, which is of varying intensity depending on species, develops in Hevea brasiliensis callus in vitro and can affect somatic embryogenesis. Endogenous ethylene appears to be involved since application of aminocyclopropane carboxylic acid (A...

Tungngoen, K.; Kongsawadworakul, P.; Viboonjun, U.; Katsuhara, M.; Brunel, N.; Sakr, S.; Narangajavana, J.; Chrestin, Hé., 2009: Involvement of HbPIP2;1 and HbTIP1;1 aquaporins in ethylene stimulation of latex yield through regulation of water exchanges between inner liber and latex cells in Hevea brasiliensis. Natural rubber is synthesized in specialized articulated cells (laticifers) located in the inner liber of Hevea brasiliensis. Upon bark tapping, the laticifer cytoplasm (latex) is expelled due to liber tissue turgor pressure. In mature virgin (unt...

Pujarnicle, S., 1966: Preliminary study on the enzymatic activity of the latex lutoids of Hevea brasiliensis. Distribution of acid phosphatase, beta-glucosidase and cathepsin in latex. Comptes Rendus Hebdomadaires des Seances de L'academie des Sciences. Serie D: Sciences Naturelles 262(8): 923-925

D'auzac, J.; Rlbaillier, D., 1969: Ethylene, a new stimulant for the production of hevea latex. In a number of small-scale experiments CEPA (Ethrel), which releases ethylene in situ, proved to be a more effective stimulant of latex yield than ethylene and acetylene applied under a plastic sheet, NAA, BOH or 2, 4-D. CEPA was applied under the...

Zhu, J.; Zhang, Z., 2010: Ethylene stimulation of latex production in Hevea brasiliensis. Rubber tree (Hevea brasiliensis) is an important industrial crop for natural rubber production. Ethylene, as a stimulant of latex production in H. brasiliensis, has been widely used in commercial latex production. However, the mechanism of ethylen...

Tupy J., 1980: Modification of ph of latex hevea brasiliensis cytoplasm by ethylene. In the absence of glycolytic activity the pH of isolated latex cytoplasm of H. brasiliensis increases progressively during the 1st hours of incubation. This increase is greatly enhanced after bark treatment with 2-chloroethylphosphonic acid. The p...

D.Auzac J.; Ribaillier D., 1969: Ethylene a new stimulating agent for the production of latex in hevea brasiliensis d. Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences Serie D Sciences Naturelles 268(25): 3046-3049

Auzae, Jd, 1969: Ethylene a new stimulating agent of latex production in Hevea brasiliensis

Osborne, D.J.; Sargent, J.A., 1974: A model for the mechanism of stimulation of latex flow in Hevea brasiliensis by ethylene. A model is proposed for ethylene stimulation of latex flow from tapping cuts of H. brasiliensis, based on the predicted effects of ethylene on the plasticity and structure of cell walls of the latex vessels. Evidence for the model comes from the e...