Báo cáo khoa học: "First observations on the root morphology and symbioses of 21 major tree species in the primary tropical rain forest of French Guyana"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "First observations on the root morphology and symbioses of 21 major tree species in the primary tropical rain forest of French Guyana. | 407 Ann Sci For 1994 51 407-416 Elsevier INRA Original article First observations on the root morphology and symbioses of 21 major tree species in the primary tropical rain forest of French Guyana M Béreau 1 J Garbaye 2 INRA Station de Recherches Forestieres Groupe Regional de Guyane BP 709 97387 Kourou CEDEX French Guyana 2 INRA Centre de Recherches Forestieres de Nancy 54280 Champenoux France Received 15 June 1993 accepted 2 December 1993 Summary A wide diversity of root morphology and symbiotic associations have been catalogued in 21 tree species in the tropical rain forest of French Guyana. Some unusual structures are described such as nodular short roots containing hyphal coils. Endomycorrhizal symbiosis prevails in this type of forest. Parasitic nematodes Meloidogyne sp on young seedling roots of Dicorynia guianensis and Pelto-gyne venosa probably interfere with their regeneration. tropical rain forest Caesalpinioideae root type symbiotic status French Guyana Resume Premieres observations sur la morphologic des racines et les symbioses racinaires de 21 espèces principales d arbres en foret tropicale humide primaire de Guyane tranọaise. Dans la foret tropicale humide de Guyane frangaise une grande diversite de morphologie racinaire et d associations symbiotiques a été observée sur 21 espèces d arbres. Certaines structures inhabi-tuelles sont décrites comme des racines courtes noduleuses contenant des hyphes en pelotons. Les endomycorhizes constituent I association symbiotique dominante dans ce type de foret. Des galles à nematodes Meloidogyne sp frequentes sur les racines des semis de Dicorynia guianensis et de Peltogyne venosa ịouent probablement un role dans la regeneration de ces espèces. foret tropicale humide Caesalpinioideae morphologie racinaire symbiose Guyana frangaise 408 M Béreau J Garbaye INTRODUCTION The primary tropical rain forest of French Guyana has been extensively studied for its structure and regeneration dynamics Riera et al 1990 .