아까시흰구멍버섯(Perenniporia fraxinea)에 의한 전주시 느티나무 가로수의 내부 부후 및 부후력 조사 = Internal Wood Decay and Decay Potential for Street Trees of Zelkova serrata in Jeonju Caused by Perenniporia fraxinea

다국어 초록 (Multilingual Abstract)

Perenniporia fraxinea is a major white-rot pathogen that causes rapid structural weakening of living hardwoods and poses significant safety risks to urban street trees. This study investigated the infection status, internal decay characteristics, and wood-block decay capacity of Zelkova serrata street trees in Jeonju, Korea. A total of 60 trees were classified into three groups:fruiting-body trees (n = 20), suspected-decay trees (n = 20), and healthy trees (n = 20). The pathogen was isolated on PDA medium and identified through ITS PCR and Sanger sequencing. Internal decay was evaluated using Arbotom sonic tomography to quantify decay depth and structural defects. Additionally, a 12-week inoculation assay using 1×1×1 cm wood blocks was conducted to quantify the decay capacity of P. fraxinea by measuring mass loss and structural changes.

Fruiting-body trees exhibited the highest internal decay ratio and pronounced vitality decline, whereas healthy trees showed minimal internal defects. Notably, suspected-decay trees showed negligible internal decay despite external signs, highlighting the limitations of visual assessment. The wood-block decay assay demonstrated that P. fraxinea caused substantial mass loss (avg. 16.76 %) and characteristic white-rot features within a short incubation period, indicating moderate-to-strong decay aggressiveness compared to Ganoderma spp. Environmental assessments revealed that external site conditions such as soil compaction and drainage did not statistically differ among groups, suggesting that pathogen infection is the dominant factor driving internal decay rather than environmental stress alone.
This study provides an integrated assessment combining pathogen identification, non-destructive decay diagnostics, and experimental decay quantification. The results establish foundational evidence for improving urban tree risk-assessment models and developing management strategies for white-rot pathogens in street tree systems.

목차 (Table of Contents)

• Ⅰ. 서 론 1
• Ⅱ. 재료 및 방법
• 1. 조사대상 3
• 2. 생육환경 조사 8
• 3. 자실체 채집 및 동정 13
• 4. 근원부 내부부후 단층 조사 18
• 5. 목편 건중량 실험 22
• Ⅲ. 결과
• 1. 생육환경 조사 결과 24
• 2. ITS rDNA 영역 PCR 증폭 및 염기 서열 분석 32
• 3. 내부부후측정 결과 35
• 4. 목편 건중량 실험 결과 43
• Ⅳ. 고찰 48
• Ⅴ. 결론 54
• 참고문헌 55