Wongcharoen A. auteur aut IRD Pando Anne auteur aut IRD Nandris Daniel auteur aut IRD Hanboonsoon Y. auteur aut IRD Hartmann Christian auteur aut IRD Rouland Lefèvre Corinne auteur aut IRD text journalArticle eng text/pdf born digital access Trunk phloem necrosis (TPN) is currently one of the most economically important diseases of the rubber tree (Hevea brasiliensis). Investigations of the aetiology of the disorder have failed to identify any biotic causal agents but a multidisciplinary study has recently suggested that the disease may be caused by a combination of exogenous and endogenous stresses. These stresses can affect plant physiology and may also have an impact on soil biology and soil biochemistry. In this study, macrofauna diversity and soil enzyme activities were compared for the soils under trees affected by TPN and under healthy trees. Principal component analysis revealed associations between TPN and macrofauna diversity and soil enzyme activities. Groups of ants and termites were associated with the soil under healthy and trees affected by TPN respectively. Polysaccharidase (cellulase, xylanase and, particularly, amylase) activities were lower in the soil under trees affected by TPN whereas N-acetylglucosaminidase activity was higher. These findings suggested that termite density and N-acetylglucosaminidase activity are useful indicators of TPN, while lower values of polysaccharidases activities are the consequence of this disease. The impact of TPN on soil ecosystem was discussed. specialized 076 41 1 41-47 2011 1437-4781 https://www.documentation.ird.fr/hor/fdi:010053130 10.1111/j.1439-0329.2009.00634.x 1437-4781 [F B010053130] https://www.documentation.ird.fr/hor/fdi:010053130 https://www.documentation.ird.fr/intranet/publi/2011/03/010053130.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-04-07 2017-08-23 fdi:010053130 fre