TAILIEUCHUNG - Báo cáo lâm nghiệp: "Serotinous cones of Cupressus sempervirens provide viable seeds in spite of high seed predation."

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Serotinous cones of Cupressus sempervirens provide viable seeds in spite of high seed predation. | Ann. For. Sci. 60 2003 781-787 INRA EDP Sciences 2004 DOI forest 2003073 781 Original article Serotinous cones of Cupressus sempervirens provide viable seeds in spite of high seed predation Andrea BATTISTIa Raffaella CANTINIb Gaelle ROUAULTc Alain ROQUESc a University of Padova DAAPV-Entomology Agripolis 35020 Legnaro PD Italy b Istituto Protezione Piante CNR Via Madonna del Piano 50019 Sesto Fiorentino Firenze Italy c INRA Station de Zoologie forestière BP 20619 45166 Olivet France Received 21 January 2002 accepted 26 August 2002 Abstract - Five half-sib families in an 18-year old family test of Cupressus sempervirens in Italy were compared for cone crop size cone serotiny and seed damage. The mean number of serotinous cones per tree was significantly different among families although families did not differ by the total number of cones produced during tree s lifetime. More than 60 of the cones were colonised either by a seed chalcid Megastigmus wachtli or by a seed bug Orsillus maculatus whereas pathogenic fungi Seiridium Cardinale Pestalotiopsis funerea were observed in less than 25 of these cones. The quantity and quality of seeds varied significantly among families and age of cones. Seed loss due to predators and pathogens was very important in serotinous cones varying from up to . However the remaining sound seeds showed a germination rate higher than 70 and cone serotiny seemed to play an important role in cypress reproductive biology. Cupressus sempervirens cone serotiny seed predation pathogenic fungi Résumé - Les cônes sérotineux de Cupressus sempervirens portent des graines viables même si les dégâts des ravageurs sont très importants. La production de cônes la sérotinie et les dégâts causés aux graines ont été compares entre cinq familles de demi-frères au sein d un test de familles de Cupressus sempervirens de 18 ans d âge en Italie. Des différences significatives entre familles ont été observées pour le nombre moyen de cônes .

• Báo cáo khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp