@article{fdi:010046169,
  title = {{T}he leaf, inner bark and latex cyanide potential of {H}evea brasiliensis : evidence for involvement of cyanogenic glucosides in rubber yield},
  author = {{K}ongsawadworakul, {P}. and {V}iboonjun, {U}. and {R}omruensukharom, {P}. and {C}hantuma, {P}. and {R}uderman, {S}. and {C}hrestin, {H}erv{\'e}},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he latex of {H}evea brasiliensis, expelled upon bark tapping, is the cytoplasm of anastomosed latex cells in the inner bark of the rubber tree. {L}atex regeneration between two tappings is one of the major limiting factors of rubber yield. {H}evea species contain high amounts of cyanogenic glucosides from which cyanide is released when the plant is damaged providing an efficient defense mechanism against herbivores. {I}n {H}. brasiliensis, the cyanogenic glucosides mainly consist of the monoglucoside linamarin (synthesized in the leaves), and its diglucoside transport-form, linustatin. {V}ariations in leaf cyanide potential ({CN}p) were studied using various parameters. {R}esults showed that the younger the leaf, the higher the {CN}p. {L}eaf {CN}p greatly decreased when leaves were directly exposed to sunlight. {T}hese results allowed us to determine the best leaf sampling conditions for the comparison of leaf {CN}p. {U}nder these conditions, leaf {CN}p was found to vary from less than 25 m{M} to more than 60 m{M}. {T}he rubber clones containing the highest leaf {CN}p were those with the highest yield potential. {I}n mature virgin trees, the {CN}p of the trunk inner bark was shown to be proportional to leaf {CN}p and to decrease on tapping. {H}owever, the latex itself exhibited very low (if any) {CN}p, while harboring all the enzymes (beta-{D}-diglucosidase, linamarase and beta-cyanoalanine synthase) necessary to metabolize cyanogenic glucosides to generate non-cyanogenic compounds, such as asparagine. {T}his suggests that in the rubber tree bark, cyanogenic glucosides may be a source of buffering nitrogen and glucose, thereby contributing to latex regeneration/production.},
  keywords = {{H}evea brasiliensis ; {E}uphorbiaceae ; {R}ubber tree ; {L}atex ; {L}eaf and bark cyanide potential ; {C}yanide metabolism ; {L}inamarin ; {R}ubber yield},
  booktitle = {},
  journal = {{P}hytochemistry},
  volume = {70},
  numero = {6},
  pages = {730--739},
  ISSN = {0031-9422},
  year = {2009},
  DOI = {10.1016/j.phytochem.2009.03.020},
  URL = {https://www.documentation.ird.fr/hor/fdi:010046169},
}