게르마늄 처리가 배 ‘신고’ 과실품질 특성에 미치는 영향
Effect of Germanium Treatment on the Quality of‘Niitaka’Pear Fruit
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초록
본 연구는 게르마늄(Ge) 처리 및 처리방법에 따른 배 ‘신고’ 과실품질에 미치는 영향을 구명하고자 실시하였다. 수확 6개월 후에 저온 저장된 과실을 분석한 결과 Ge처리에 의해서 배 ‘신고’ 품종의 고유한 색깔을 나타내는 담황색을 많이 띄는 과실을 생산하였다. 과실의 형태나 무게는 Ge처리구와 대조구간에 유의성이 없었으며, Ge처리구는, 과실의 당산비를 높였다. 과실의 씹힙성을 저해하는 석세포 함량을 조사한 결과, 모든 Ge 처리구에서 대조구보다 낮은 함량을 나타냈고, 특히 Ge 복합처리구에서 가장 낮은 함량을 나타냈다. 모든 Ge처리구에서 과실 내 Ge함량을 증가시켰으나, 과실 내 칼슘함량을 감소시키는 결과를 가져왔다. 과실 내 다른 무기성분인 칼륨, 마그네슘, 인산함량은 Ge처리구와 대조구간에 유의적인 차이는 없었다. 모든 Ge 처리구에서 6개월 저장기간 동안 높은 과실경도와 과실 비중을 유지했으며, 과육 내 치밀한 세포 조밀도를 나타내서, 배 ‘신고’에서 흔히 일어날 수 있는 과실 내 바람들이 현상을 감소시켰다. 전체적으로 Ge처리구간에 유의적인 차이는 없었지만, Ge 복합처리구에서 보다 더 상품성 있는 과실을 생산한 것으로 판단된다.
Abstract
We investigated how Germanium (Ge) application, and the application method, affected ‘Niitaka’ (Pyrus pyrifolia) fruit quality in a conventional orchard. Ge-treated pears weredark yellow in color, indicating appropriate maturation. Other fruit characteristics, and weight, did not significantly differ between tests and controls. Compared to controls, fruit from Ge-treated trees had more soluble solids, a lower acid content, and fewer stone cells, which reduced fruit chewiness. Ge-treated trees showed a higher Ge concentration in fruit but a lower calcium (Ca) concentration. Other fruit mineral nutrients, includingP, K, and Mg, did not differ in level between Ge-treated fruit and controls. Ge-treated fruit showed greater firmness and a heavier specific weight during 6 months of storage, compared to control fruit. Therefore, Ge treatment reduced fruit pithiness, which can be a problem in ‘Niitaka’ pears. Overall, there was no significant difference between Ge-treated and control fruit qualities, but a combined Ge treatment (fertilization plus foliar application plus trunk injection) slightly improved fruit quality.
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