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자료유형
학술저널
저자정보
저널정보
한국육종학회 한국육종학회지 한국육종학회지 제41권 제4호
발행연도
2009.1
수록면
377 - 384 (8page)

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Three-year-old seedlings of susceptible Pinus densiflora and resistant Pinus x rigitaeda were each inoculated with the pinewood nematode, Bursaphelenchus xylophilus, to compare disease development. Needle dehydration was evident on seedlings of P. densiflora by 20 days after inoculation, 10 days earlier than this symptom was observed on P. × rigitaeda. Xylem drying was more frequent in seedlings of P. densiflora than in that of P. × rigitaeda between 20 and 60 days after inoculation. No significant differences were found between P. densiflora and P. × rigitaeda for stem water content or for stem and leaf relative water content in current-year branches after nematode inoculation, but the average number of B. xylophilus recovered from stems differed significantly between the two groups. The number of B. xylophilus recovered from stems was negatively correlated with the stem water content and with stem and leaf relative water content. By the time the experiment was terminated at 60 days after inoculation, all 3 of the last group of P. densiflora seedlings had died, but 2 of the 3 remaining P. × rigitaeda hybrid seedlings were still alive. Additional studies are needed to further explore the specific mechanisms preventing nematode multiplication in the seedlings of resistant P. × rigitaeda.

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