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Aminoethoxyvinylglycine 처리시기가 복숭아 ‘장택백봉’의 유통 중 품질에 미치는 영향
왕무화(Mao-Hua Wang),이욱용(Ug-Yong Lee),오광석(Kwang-Suk Oh),이은구(Eun-Gu Lee),안영직(Young-Jik Ahn),황용수(Yong-Soo Hwang),천종필(Jong-Pil Chun) 충남대학교 농업과학연구소 2012 농업과학연구 Vol.39 No.4
This research aimed to investigate the effect of preharvest spray of aminoethoxyvinylglycine (AVG) on fruit quality of ‘Nagasawa Hakuho’ peach (Prunus persica Batsch). The efficacy of various concentrations of AVG (75 and 150 ㎎/L), which inhibits the ethylene biosynthesis, was evaluated under field conditions. Treatments were performed 21, 14 and 7 days before harvest, respectively. Fruit weight, flesh firmness, soluble solids content, acidity, ethylene production, respiration rate and skin color difference were determined at harvest time and during shelf-life at 25℃. Results indicated that the most appropriate timing of AVG spraying was 21 days before harvest at the concentration of 75 mg/L as shown higher firmness at harvest time and lower ethylene production and respiration rate during shelf-life. Spraying of AVG during near harvest period (14 to 7 days before harvest) inhibited fruit growth slightly, independent of concentration and did not affect fruit quality in ‘Nagasawa Hakuho’ peach.
Sopheareth, Mao,Chan, Sarun,Naing, Kyaw Wai,Lee, Yong Seong,Hyun, Hae Nam,Kim, Young Cheol,Kim, Kil Yong The Korean Society of Plant Pathology 2013 Plant Pathology Journal Vol.29 No.1
A chitinolytic bacterial strain having strong antifungal activity was isolated and identified as Burkholderia cepacia MPC-7 based on 16S rRNA gene analysis. MPC-7 solubilized insoluble phosphorous in hydroxyapatite agar media. It produced gluconic acid and 2-keto-gluconic acid related to the decrease in pH of broth culture. The antagonist produced benzoic acid (BA) and phenylacetic acid (PA). The authentic compounds, BA and PA, showed a broad spectrum of antimicrobial activity against yeast, several bacterial and fungal pathogens in vitro. To demonstrate the biocontrol efficiency of MPC-7 on late blight disease caused by Phyto-phthora capsici, pepper plants in pot trials were treated with modified medium only (M), M plus zoospore inoculation (MP), MPC-7 cultured broth (B) and B plus zoospore inoculation (BP). With the sudden increase in root mortality, plants in MP wilted as early as five days after pathogen inoculation. However, plant in BP did not show any symptom of wilting until five days. Root mortality in BP was markedly reduced for as much as 50%. Plants in B had higher dry weight, P concentration in root, and larger leaf area compared to those in M and MP. These results suggested that B. cepacia MPC-7 should be considered as a candidate for the biological fertilizer as well as antimicrobial agent for pepper plants.