@article{fdi:010063126, title = {{D}ifferential expression of micro{RNA}s and their targets reveals a possible dual role in physiological bark disorder in rubber tree}, author = {{L}ertpanyasampatha, {M}. and {V}iboonjun, {U}. and {K}ongsawadworakul, {P}. and {C}hrestin, {H}erv{\'e} and {N}arangajavana, {J}.}, editor = {}, language = {{ENG}}, abstract = {{T}runk phloem necrosis ({TPN}), a physiological bark disorder of the rubber tree ({H}evea brasiliensis), is a serious problem that affects the yield of natural rubber. {T}he resultant bark dryness occurs in up to half of a plantation's trees in almost every rubber tree plantation region, causing a great annual loss of dry rubber for natural rubber production. {D}ifferent types of injury and physical damage caused by mechanical activation as well as environmental stresses cause physiological bark disorder in tree. {D}ue to the essential role of mi{R}166, mi{R}393 and mi{R}167 in vascular development and abiotic stress response in diverse plant species, it was interesting to investigate the role of these mi{RNA}s in rubber trees, particularly during development of a physiological bark disorder. {I}n this study, the expression pattern of mi{R}166, mi{R}393 and mi{R}167; and their target genes, {HD}-{ZIP} {III}; {TIR}1 and {ARF}8, respectively; was demonstrated in healthy tree and different {TPN} trees. {T}heir existence and function in vivo was validated using {RNA} ligase-mediated 5' rapid amplification of c{DNA} ends. {T}aken together, the results suggest a possible dual role of these three mi{RNA}s in maintaining normal bark regeneration in healthy trees, coping with overtapping by affecting the wound healing system leading to abnormal bark regeneration in overtapped-{TPN} trees, and act as additional forces that enhance the attenuation of vascular development resulting in bark necrosis and cell death in the natural-{TPN} tree. {T}his is the first study to address the molecular events of mi{RNA}s involved in the physiological bark disorder {TPN} in rubber tree. {F}urther study will open the possibility to better understanding of physiological and molecular perspectives during {TPN} development, and lead to improvement of monitoring the exploitation of rubber tree plantations.}, keywords = {{M}icro{RNA} ; {R}ubber tree ; {T}runk phloem necrosis ; {THAILANDE}}, booktitle = {}, journal = {{J}ournal of {P}lant {P}hysiology}, volume = {171}, numero = {13}, pages = {1117--1126}, ISSN = {0176-1617}, year = {2014}, DOI = {10.1016/j.jplph.2014.05.001}, URL = {https://www.documentation.ird.fr/hor/fdi:010063126}, }