• 한국자원식물학회지
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• 제26권6호
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• pp.695-700
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• 2013

Flax (Linum usitatissimum L.) has been used for the only edible oil in Korea. We carried out the field experiment in order to investigate the possibly combined effects of mepiquat chloride (MC) and trinexapac-ethyl (TE) on oil composition, lignan content, seed yield and endogenous gibberellins content of flax cultivar. Plant growth retardants mepiquat chloride (300 and 600 ppm) and trinexapac-ethyl (100, 200 and 300 ppm) were foliar-sprayed to flax plant at 50days after seeding. The plant height was decreased in the combination of mepiquat chloride 600 ppm with trinexapac-ethyl 100, 200 and 300 ppm. Mepiquat chloride treatment combined with trinexapac-ethyl observed the highest response on seed yield, followed by mepiquat chloride 300 ppm with trinexapac-ethyl 100 ppm, mepiquat chloride 300 ppm with trinexapac-ethyl 200 ppm and mepiquat chloride 300 ppm with trinexapac-ethyl 300 ppm. Lignan content was increased in all of the combination treatments. It concludes that the combination of mepiquat chloride 300 ppm with trinexapac-ethyl 300 ppm will be useful to increasing oil and lignan content in flax plants.

• 한국자원식물학회지
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• 제24권6호
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• pp.696-701
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• 2011

The aim of this field experiment was to investigate the possible effects of mepiquat chloride (TE) and trinexapac-ethyl (MC) on oil composition, seed yield and endogenous gibberellins content of flax cultivar. Foliar application of plant growth retardants mepiquat chloride (0.897, 1.794 and 2.691 kg a.i. $ha^{-1}$) and trinexapac-ethyl (0.756, 1.512 and 2.668 kg a.i. $ha^{-1}$) had significantly increased seeds ripening rate and seed yield. In contrast, plant height was decreased by foliar application of MC and TE. The application of MC significantly increased seed oil yield (730 kg $ha^{-1}$ by 27.0%) compared to the control. Seed and oil yield, and unsaturated fatty acids (oleic acid, linoleic acid and linolenic acid) were increased by foliar application of MC.

• 한국약용작물학회지
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• 제23권4호
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• pp.311-318
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• 2015

This study had been conducted to investigate the effect of some plant growth regulators inducing fruit enlargement and optimal harvest time in Sageretia thea. Two hundred fifty $mg/{\ell}$ mepiquat chloride treatment, $1mg/{\ell}$ thidiazuron treatment on full bloom, and $200mg/{\ell}$ gibberellic acid treatment on 7 days before full bloom resulted in the increase of 21.7% in weight, and $200mg/{\ell}$ gibberellic acid treatment 7 days before full bloom, 10$mg/{\ell}$ forchlorfenuron treatment 14 days after full bloom, and $1mg/{\ell}$ thidiazuron treatment on full bloom also brought about positive effects on the enlargement of the fruit, increasing 6.3%, 6.3% and 8.1% in its transverse diameter, respectively. Furthermore, the effects of the plant growth regulator treatments on the harvest time of Sageretia thea were determined as follows: the increase in the optimal harvest time of 57.2 - 75.4%, shorter maturation period, by the treatments with $500mg/{\ell}$ mepiquat chloride 7 days after full bloom, $100mg/{\ell}$ gibberellic acid treatment on full bloom, $2.5mg/{\ell}$ forchlorofenuron 7 days after full bloom and $2mg/{\ell}$ thidiazuron treatment 7 days before full bloom; and the greater effects of plant growth regulator treatments on the fruit maturation in the following order, gibberellic acid > thidiazuron > forchlorofenuron > mepiquat chloride. The results of this study are expected to be used as a reference data to develop Sageretia thea as a new local specific crop for Jeju island.

• 한국버섯학회지
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• 제18권4호
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• pp.380-386
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• 2020

전국 12개 지역에서 수집된 표고 768건, 표고배지 143건의 시료를 대상으로 다종다성분 320종 및 단성분 mepiquat chloride에 대해 분석한 결과, 표고 4건, 표고배지 3건으로 총 7건에서 잔류농약이 검출되었으며, 검출된 성분은 carbendazim, diflubenzuron, fluopyram, dinotefuran 이었다. 본 연구에서는 표고 3건, 배지 1건으로 총 4건의 시료에서 carbendazim이 검출되었으나 각각의 검출량은 0.056 mg/kg, 0.17 mg/kg, 0.043 mg/kg, 0.09 mg/kg으로 MRL인 0.7 mg/kg에 비해 소량으로 나타났다. Fluopyram은 0.068 mg/kg, dinotefuran은 0.06 mg/kg으로 모두 배지에서 각각 1건씩 검출되었다. 식물생장조절제로 사용되는 mepiquat chloride는 본 연구에서는 검출되지 않았다. 전체 수집표고 중 소수의 시료에서 잔류농약이 검출되었나, 등록되지 않은 농약은 PLS에 의하면 0.01 ppm이 최대허용치로 구분되어 있어, 후속 연구를 통하여 표고를 비롯한 버섯류의 안전성의 기준 작성에 필수적인 자료를 확보하고자 한다.

• 한국버섯학회지
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• 제18권4호
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• pp.387-392
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• 2020

국내 유통 중인 건조 목이 8건(국내산 3건, 중국산 5건)을 수집하여 잔류농약 321종, 중금속 7종, 방사능 3종의 유해물질 잔류성분을 조사하였다. 잔류농약 검사결과 국내산 3건에서는 검출되지 않았으나, 중국산 5건 중 4건에서 Chlorpyrifos, Isoprocarb, Mepiquat chloride, Carbendazim이 검출되었다. 농산물 농약 잔류허용기준에 의하면 목이는 Mepiquat chloride(0.5 mg/kg 이하)만 기준치가 설정되어 있다. 또한 중금속 검사결과는 모든 건조 목이에서 미량의 중금속이 검출되었으나, 기준치 이하로 낮게 나타났다. 다만 국내산 시료 1건에서 납 함량이 기준치(0.3 mg/kg)보다 높게 나타나 정확한 원인 규명을 위해서는 톱밥배지, 지하수, 보관·유통 과정에 대한 추가적인 조사가 필요할 것으로 보여진다. 방사능 조사결과에서는 모든 건조 목이에서 방사능 농도가 MDA값 이하로 불검출 수준으로 나타났다. 국내산과 중국산의 평균 방사능 농도는 요오드(131I)와 세슘(134Cs)은 비슷한 수준으로 나타났으며, 세슘(137Cs)은 국내산보다 중국산에서 다소 높게 나타났다. 방사성 세슘(137Cs)은 버섯류에 잘 농축되는 것으로 알려져 있는데 이번 조사에서는 국내 유통 중인 건조 목이는 방사능에 안전하게 나타났다.

• 한국작물학회지
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• 제49권4호
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• pp.300-304
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• 2004

Gibberellic acid did not affect ethylene production, whereas gibberellin biosynthesis inhibitors triggered ethylene production in dormant tubers. Gibberellic acid did not induce sprouting of dormant tubers, however, treatment of gibberellin biosynthesis retardants enhanced sprouting rates. Sprouting rate in ancymidol-treated tubers was highest among gibberellin biosynthesis retardants. Sprouting rate of tubers treated with ancymidol increased to $91.4\%$. Batatasin-III content in $GA_3$ treated tuber was increased in the highest concentration $(30{\mu}g\;I^{-1})$. Tubers treated with mepiquat chloride, Batatasin-I was increased steadily, but contents of Batatasin-III and V showed dramatic decrease at the $ 1,000{\mu}g\;I^{-1})$ concentration. This infers that gibberellin biosynthesis retardants play key roles in promoting breaking dormancy on dormant tubers of Chinese yam.