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치즈 유청의 오이모자이크바이러스와 고추모틀바이러스 감염 억제 효과
정봉남(Bong Nam Chung),권선정(Sun Jung Kwon),최국선(Gug Seoun Choi),윤주연(Ju Yeon Yoon),조인숙(In Sook Cho) 한국식물병리학회 2020 식물병연구 Vol.26 No.2
치즈 제조공정에서 나오는 부산물인 유청이 진딧물에 의 해 전염되는 오이모자이크바이러스(cucumber mosaic virus, CMV)와 고추모틀바이러스(pepper mottle virus, PepMoV)의 감염 억제효과가 있는지를 고추 ‘청양’ 품종을 대상으로 조사 하였다. 온실에서 유청 원액 및 원액을 물로 2–20배로 희석하 여 고추 ‘청양’ 품종에 분무한 후 복숭아혹진딧물을 이용하여 CMV-Vch를 접종한 결과, 원액을 처리한 실험 구의 감염률이 6.6%로, 대조로 물을 처리한 실험 구의 감염률 23.3%에 비해 저하되었다. 노지에서 재배하는 고추 ‘청양’ 품종에 CMV는 인 위적으로 접종하지 않고 자연 감염되도록 둔 상태에서 정식일 부터6월말일까지1주일간격으로유청원액을분무처리한결 과, 6월5일 이전에 자연적으로 CMV에 감염된 식물체의 비율이 무처리와 살충제 처리에 비해 각각 18.9%와 16.7% 감소하였다. 유청의 식물 바이러스 감염억제에 대한 작용 기작을 알기 위하 여 온실에서 PepMoV-kr에 감염된 식물체 즙액과 유청을 1:1로 혼합하여 고추에 인공접종하여 시간경과에 따른 외피단백질 농도변화를웨스턴블로팅방법으로분석한결과,접종6일후 대조에 비하여 적었으나, 접종 9일 후에는 대조와 동일하게 증 가하였다. 본 연구 결과는 유청이 고추에 발생하는 서로 다른 속에 속하는 두 종류의 바이러스인 CMV와 PepMoV에 의한 감 염 억제에 효과가 있다는 것을 보여주었다. Evaluations were made for the effects of cheese whey treatment on infection of pepper plants by cucumber mosaic virus-Vch (CMV-Vch) and pepper mottle virus-Kr (PepMoV-Kr). In a greenhouse, pepper plants sprayed with whey, prior to inoculation by CMV-Vch using aphids, showed a viral infection rate significantly lower (6.6%) than for the control (23.3%). In an open field experiment, in which CMV infection relied on natural transmis- sion by aphids, pepper plants were sprayed with undiluted whey once a week, starting on the transplanting date (May 2) to the end of June. On June 5, these whey-sprayed plants showed a CMV infection rate reduced by 18.9% and 16.7%, compared to untreated and pesticide-treated plants, respectively. In the greenhouse, pepper plants inoculated with PepMoV-Kr mixed with whey showed a viral infection rate decreased by 60% compared to the control. The accumulated amount of PepMoV-Kr coat protein was less than that for the virus- only control at 6 days post inoculation (dpi), but increased up to a similar level as the control at 9 dpi. This study showed that cheese whey is effective in reducing infection of both CMV and PepMoV in pepper plants.
이희주(Hee Ju Lee),김미경(Mi-Kyeong Kim),이상규(Sang Gyu Lee),최장선(Chang Sun Choi),최홍수(Hong-Soo Choi),곽해련(Hae Ryun Kwak),최국선(Gug Seoun Choi),전창후(Changhoo Chun) 한국원예학회 2015 원예과학기술지 Vol.33 No.2
Melon leaves showing yellowing symptoms were analyzed using electron microscopy and RT-PCR for major cucurbit-infecting-viruses (CMV, MNSV, CGMMV, SqMV, WMV, KGMMV, PRSV and ZYMV) reported in Korea, but these viruses were not detected. As the result of further analysis by next-generation sequencing (NGS), the virus was identified as Cucurbit aphid-borne yellows virus (CABYV), and then confirmed by RT-PCR using CABYV-specific primers. When photosynthetic capacity was measured based on chlorophyll fluorescence yield (ChlFY), the leaves of the diseased plants showed 4.09 μ㏖?m<SUP>-2</SUP>?s<SUP>-1</SUP>, which was one-third of the readings observed for unaffected normal plants (12.36 μ㏖?m<SUP>-2</SUP>?s<SUP>-1</SUP>). The root functions of plants affected by leaf yellowing symptoms (LYS) was 0.28 ㎎?g<SUP>-1</SUP>, about half that measured for the normal unaffected plants (0.48 ㎎?g<SUP>-1</SUP>). Cytological observations revealed that there were no morphological differences in the palisade parenchyma and mesophyll spongy cells of the leaves between the diseased and the normal plants. However, the same leaf cells of the affected plants contained more starch granules compared to those of the normal, unaffected plants. We conclude that the LYS of muskmelon is not merely a physiological disorder but a viral disease caused by CABYV and spread by aphids.