가온 하우스의 망고 ‘Irwin’ 열매솎이(엽과비)에 따른 과실품질, 활성산소 소거활성 및 폴리페놀 함량 비교

Comparison of the Characteristics of Fruit Quality and Free Radical Scavenging Activities and Polyphenol Content by a Degree of Fruit Thinning(Leaf-Fruit Ratio) in Mango ‘Irwin’ Cultivated in a Plastic Heating House

망고 ‘Irwin’의 가온 하우스 재배에 에서 열매솎이(엽과비, 7-10; 조적과 및 16-20; 정밀적과)에 따른 과실품질, 활성산소 소거활성을 비교하였다. 과실생육 동안에 과실크기와 후숙 후의 과실품질은 조적과가 정밀적과보다 낮았다. 나무의 스트레스와 연관된 광양자 효율(Fv/Fm)은 조적과가 정밀적과 보다 낮은 경향을 보였다. 활성산소 소거활성은 과피 및 과육의 에탄올 추출물 함량에 따라 차이가 있었다. 과피 추출물에서는 조적과가 0.25µg 이하에서 과육추출물은 1mg 이하에서 정밀적과 보다 높았다. 활성산소 소거활성에 관련된 mangiferin 함량은 처리간에 차이가 없었으나 naringin함량은 차이가 있었다. 특히, 과피 및 과육추출물에서 그 활성산소 소거활성의 차이는 극도의 여러 스트레스의 환경상태에서 착과부담이 더해진 스트레스 영향 등에 의한 것으로 생각이 되었다.

The characteristics of fruit quality, free radical scavenging activity of mango ‘Irwin’cultivated in a plastic heating house were compared between types of the fruit thinning (leaf-fruit ratio 7-10; rough fruit thinning, leaf-fruit ratio 16-20; and detailed fruit thinning). The fruit size during the growth stage and fruit quality after ripening were lower in rough fruit thinning (RFT) than in detailed fruit thinning (DFT). The proton efficiency(Fv/Fm) related to tree stress tended to be lower in REF than in DFT. The free radical scavenging activity differed according to the content of ethanol extract in peel and flesh. The free radical scavenging activity of RFT was higher than the of DEF in peel extracts when the content of ethanol was not higher then 0.25μg and the flesh extracts when the content to ethanol was not higher than 1mg. There was no difference in mangiferin content related to the free radical scavenging activity between the two treatments, but naringin content differed between the treatments. In particular, the difference in free radical scavenging activity in the peel and flesh extracts was thought to be attributable to the effects of added stress with the fruit setting burden in an environment with many extreme stress conditions