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자료유형
학술저널
저자정보
저널정보
고려인삼학회 Journal of Ginseng Research 고려인삼학회지 제28권 제3호
발행연도
2004.9
수록면
149 - 156 (8page)

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The objectives of this study were to investigate the morphology of myconhizal roots. and the effects of root age and soil texture on the myconhizal infection in ginseng (Pw/(Lr ginseng C. A. Meyer) growing in Korea. Ginseng roots at ages of two to six years were collected from fields in late June. Their infection by arbuscular myconhizal fungi (AMF) was studied by clearing the roots and staining fungal hyphae with trypan blue. Root infection varied greatly depending on the developmental stages of young roots. Young teniary roots. in diameter of smaller than 0.8 mm. fonned during the CUlTent growing season had root hairs and were frequently and in some cases heavily infected by AMP. Hyphal coils and arbuscules were abundant. while vesicles were rarely observed. Older secondary or teniary roots in diameter of bigger than 1.0 mm with fully differentiated primal)' xylem fonned during the previous growing season had no root hairs. and were not infected at all. The rates of myconhizal infection in the young ter1iary roots were not affected by the age of the ginseng plants. suggesting that fungal populations might have not much changed during the aging of the cultivated fields up to six years. The differences in the infection rates among the different ages of ginseng were caused by differences in the amount of young teniar)' roots in the samples. Soil texture, either sandy loam or clay loam. did not affect the rate of root infection. There were large variations in the infection rates among the different farms and locations within a fann. It strongly suggested that infection rates of the ginseng roots by AMF would be influenced by the practice of the farmers. possibly by avoiding consecutive planting. introduction of new topsoil. and the ways of handling the soil before tHms?planting the ginseng. such as fumigation or sterilization that might have affected indigenous inoculum sources of the AMP.

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Abstract

INTRODUCTION

MATERIALS AND METHODS

RESULTS

DISCUSSION

REFERENCES

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