• Food Science and Preservation
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• v.14 no.6
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• pp.578-583
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• 2007

This study was conducted to evaluate the effect of high $CO_2$ pre-storage treatment on the quality of tomatoes (Lycopersicon esculentum Mill.) during ripening. Tomatoes at different maturity stage of breaker and pink were treated in air, or $CO_2$ (25, 50, 100%) for 24 hr at $20^{\circ}C$ before ripening in air at $20^{\circ}C$. Change of surface colour and softening were reduced by high $CO_2$ treatment of all concentrations. This effect of $CO_2$ on the colour and softening was higher in breaker fruit than pink fruit. $CO_2$ concentration of $25{\sim}100%$ did not affect on soluble solids content during ripening period. Titratable acidity of breaker tomatoes were reduced by 100% $CO_2$ treatment. High $CO_2$ treatment slightly reduced sweetness of breaker tomatoes. Acidity and texture of tomatoes increased with high $CO_2$ treatment. Off-flavour was denoted by $CO_2$ treatment in pink tomatoes. The external $CO_2$ injury developed after 22 days at $20^{\circ}C$ in pink tomatoes when treated with ${\geq}25%$ $CO_2$ and in breaker tomatoes with ${\geq}50%$ $CO_2$.

• Korean Journal of Weed Science
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• v.15 no.2
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• pp.148-153
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• 1995

Glyphosate (N-[phosphonomethyl]glycine) applied to the assimilate-exporting leaves or sprayed to the whole plants of tomato(Lycopersicon esculentum Mil var. Moneymaker) induced the rapid inhibition of 5-enolpyruvyl skimic acid 3-phosphate synthase(EPSP-synthase). It shows that EPSP-synthase activity precedes chlorophyll loss. There is no difference in EPSP-synthase activity between in vivo tomato meristem and cell suspension culture if glyphosate is not applied. The EPSP-synthase activity is in a range of 4 to 6 nkat per mg protein. The inhibition of EPSP-synthase action is induced within 36 h after glyphosate application while the Chl contents were reduced 48 h after the application. In cell suspension culture of tomato and Corydalis (Corydalis sempervirens), a sublethal concentration of glyphosate retards the fresh weight increase and prolonged lag phase. The fresh weight is reached maximal about 14 days after the subculture in the presence of glyphosate. The inhibitory effect of glyphosate on EPSP-synthase is remarkably induced in lag phase.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1995.10a
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• pp.58-60
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• 1995

1995년 현재 전국의 육묘장 수는 대략 25개소에 이른다. 1992년부터 도입되기 시작한 플러그육묘 방식은 급속도로 늘어나 매년 5-7개소가 신설되고 있다. 이와 같이 양적팽창에도 불구하고 품질, 수량, 납기 및 경영상의 문제점을 드러내고 있어 상당수의 육묘장은 경영적 어려움에 처해 있다. 이와 같은 문제점 중에서도 가장 심각한 것은 기술수준의 낙후로 인한 품질의 저하이다. 플러그는 작은 셀내에서 육모되기 때문에 밀도가 높아 도장의 우려가 크다. (중략)

• The Plant Pathology Journal
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• v.15 no.6
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• pp.348-350
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• 1999

Gray leaf spot of tomato was observed on tomato plants growing in a middle of a pepper field where pepper plants were badly infected with gray leaf spot. Both Stemphylium solani and S. lycopersici were isolated from the lesion. Both species were highly pathogenic on tomato and pepper. This is the first report in Korea of occurrence of gray leaf spot of tomato caused by Stemphylium solani Weber.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.04a
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• pp.1-2
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• 2002

토마토의 품질을 향상시키기 위한 처리들이 대부분 수량감소를 동반하는데 수량감소를 최소화하면서 품질을 개선할 수 있는 방법을 구명하기 위하여 해수를 처리하여 토마토의 품질을 향상시킬 수 있는 가능성을 검토하였다. 해수에는 Na와 Cl 이온이 80% 이상을 차지하고, EC가 높기 때문에 NaCl을 대체할 수 있을 뿐만 아니라 근권에 EC를 효과적으로 높일 수 있을 것으로 판단되어 수행하였다. (중략)

• Korean Journal Plant Pathology
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• v.14 no.6
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• pp.744-746
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• 1998

Control effect of acidified nutrient solution on bacterial wilt of tomato plants was tested by examining the degree of bacterial growth inhibition and plant damage due to the acidity. Ralstonia solanacearum, the causal bacterium of bacterial wilt of tomato plants, showed 105 times population reduction when the bacterium was cultured in the acidified nutrient solution (pH 3.5∼4.0). However, fruit yields were decreased only fifteen to twenty percents. These results suggest that control of the bacterial wilt of tomato plants may be possible with supplying acidified nutrient solution.

• Applied Biological Chemistry
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• v.50 no.4
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• pp.253-256
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• 2007

In an attempt to optimize the in vitro-regeneration conditions necessary for the genetic manipulation of tomato species, we examined 'Ailsa Graig' cultivar of Lycopersicon for regeneration ability. The basal medium used for callus formation and shoot regeneration was MS (MS + vitamin) supplemented with six combinations of zeatin 2 mg/l, zeatin 2 mg/l + IAA 0.1 mg/l, zeatin 2 mg/l + IAA 0.5 mg/l, zeatin 4 mg/l, zeatin 4 mg/l + IAA 0.1 mg/l and zeatin 4 mg/l + IAA 0.5 mg/l. When all conditions tested were considered, however, only zeatin 2 mg/l was shown to be the best in shoot regeneration. The morphological characterization from in vitro-cultured callus of Lycopersicon esculentum L. var. 'Ailsa Craig' was investigated with scanning electron microscope (SEM). The surfaces of in vitro-cultured callus had well-defined epidermal cell in condition of zeatin 2 mg/l, but those of different treatments were twisted. These results suggested that shape of callus was involved in efficiency of shoot regeneration in tomato 'Ailsa Craig'.

• Korean Journal of Plant Tissue Culture
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• v.21 no.2
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• pp.69-76
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• 1994

Callus growth and shoot regeneration of Solanum and Lycopersicon depended on genotype, growth regulators, and thiamine concentration. L. peruvianum LA 1277 and L. peruvianum LA 1373 and PI 251301 had the greatest callus growth while L hirsutum LA 1777, L.esculentum 'Diego'and 'Red Plum' had the least callus growth. Lycopersicon penvianum genotypes were superior to L. esculentur genotypes in regenerating plants. MG medium was more effective in regenerating shoots than MS medium. A low level of IAA (0.2mg/L) and high level of BA (2 mg/L) resulted in the greatest shoot regeneration. Shoot growth varied depending on thiamine concentration and genotype. Shoot proliferation of Solanum ptycathum, Solanum nigrum, and L. peruvianum PI 199380 was best on medium with 20 mg/L thiamine. Regeneration of L. peruvianum PI 251301 and PI 128652 was better on medium with 30 and 10mg/L thiamine, respectively.

• Korean Journal of Organic Agriculture
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• v.20 no.3
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• pp.385-397
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• 2012

A pot experiment was carried out to examined the effect of electrolyzed micronutrients (Fe, Mn, Zn, Sr, Se, Sn, Co, Ti, and V) solution treatments with nutrient solution and SCB slurry on the mineral content and growth of tomato in cherry tomato (Lycopersicon esculentum). The treatment of nutrient solution (NS)+micronutrients solution (MS) significantly increased the concentrations of Li, Zn, Sr, Se, Ti as compared with that of NS alone in the cherry tomato fruits, and SCB+MS solution treatment significantly increased Li, Zn, Se, Co, Sr, and Ti contents as compared with SCB treatment. The micronutrient contents of MN+SCB+MS treatment were significantly higher in Li, Zn, Se, Co and in Ti than those of SCB and NS treatment, respectively. The growth and yield of cherry tomato fruits was highest with NS treatment. The yield indices of cherry tomato treated with NS+MS treatment and SCB+NS+MS were 97% and 94% of NS treatment. In conclusion, it seems to be possible to produce micronutrient-fortified cherry tomato by the mixed treatment of electrolyzed micronutrients.

• Journal of Bio-Environment Control
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• v.6 no.1
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• pp.34-42
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• 1997

Effects of DIF on stem elongation in plug seedlings of mini tomato ‘Mini Carol’ and on the growth and flowering after transplanting were investigated. Stem elongation of seedlings was mainly influenced by day temperature rather than night temperature. When the effect of ＋DIF was compared to that of -DIF under the same average daily temperature(ADT), day temperature had greater impact on internode elongation than night temperature. On the other hand, leaf unfolding rate increased and compactness decreased as ADT in creased. Differences in internode length affected by DIF during seedlings stage DIF progressively diminished during growth period after transplanting. Node position at which first flower was initiated was lowered as ADT decreased. It was concluded that DIF treatment was an applicable tool for control of stem elongation, particularly to reduce stem length without a noticeably adverse effect on the growth and development of plant after transplanting.