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Symptoms in slash pine seedlings following inoculation with the cone rust fungus Cronartium strobilinum

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Six-week-old seedlings of slash pine () were inoculated with sporidia of , which is the cause of southern cone rust disease, by wounding the apical tips of the seedlings. Pycnial sori developed abundantly within 1 month of inoculation on the epicotyl and primary needles. The progress of the pathogen was confirmed histologically within the cells of the stem and haustoria were observed near the nucleus of the cells. In the needles, pycnial pustules developed and the fungus was abundant in the mesophyll.

Symptômes chez les semis de Pinus elliottii inoculés par Cronartium strobilinum

Des semis de six semaines de Pinus elliottii ont été inoculés avec des basidiospores de l’agent de la rouille des cônes Cronartium strobilinum, sur blessure de l’extrémité apicale des semis. Des spermogonies se sont développées abondamment en un mois sur les épicotyles et les aiguilles primaires. La progression du parasite dans les cellules de la tige a été confirmée par histologie. Des haustorias ont été observés près du noyau des cellules. Des spermogonies se sont développées sur les aiguilles et le champignon était abondant dans le mésophylle.
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Document Type: Research Article

Affiliations: 1: Forest Research Institute (ICFRE), Dehra Dun 248006, India., Email: [email protected] 2: School of Forest Resources and Conservation, University of Florida, PO Box 110410, Gainesville, FL 32669, USA

Publication date: 01 December 2001

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