• Title/Summary/Keyword: Lycopersicon esculentum

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Distribution and Phytotoxicity of Mercury in Tomato Seedlings Exposed to Mercury

  • Cho, Un-Haing
    • The Korean Journal of Ecology
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    • v.22 no.2
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    • pp.89-94
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    • 1999

  • Thirty-day-old seedlings of tomato (Lycopersicon esculentum) were treated with different concentrations of HgCl$_2$(0. 10 and 50 $\mu$M) for up to 20 days. and the detailed distribution of Hg absorbed and its toxicity in different plant parts (roots, stems and leaves) were investigated. The accumulation of Hg in plants increased with external Hg concentrations. and Hg is strongly retained by roots. Further. Hg content in leaves was various. showing more accumulation in older leaves. Seedlings exposed to toxic levels of Hg showed not only the reduction of dry weight and length of both shoot and root. and chlorophyll levels in leaves but also the enhancement of malondialdehyde (a lipid peroxidation product) formation in all plant parts investigated. These results suggest that physiological impairment of a plant exposed to Hg may be achieved by internal distribution of Hg absorbed and Hg-induced oxidative stress in different plant parts.

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Cadmium-Induced Phytotoxicity in Tomato Seedlings Due to the Accumulation of H2O2 That Results from the Reduced Activities of H2O2 Detoxifying Enzymes

  • Cho, Un-Haing
    • The Korean Journal of Ecology
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    • v.27 no.2
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    • pp.107-114
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    • 2004

  • Tomato (Lycopersicon esculentum) seedlings exposed to various concentrations of $CdC1_2$ (0∼100 $\mu$M) in the nutrient solution for up to 9 days were analyzed with the seedling growth, $H_2O_2$ production, glutathione levels and activity changes of enzymes related to $H_2O_2$ removal. The growth of seedlings was inhibited with over 50 $\mu$M Cd, whereas the levels of $H_2O_2$ and glutathione were enhanced with Cd exposure level and time. Meanwhile, Cd exposure increased the activities of catalase (CAT) and glutathione reductase (GR) but decreased the activities of dehydroascorbate acid reductase (DHAR) and ascorbate peroxidase (APX) in both leaves and roots. These results suggest that the altered activities of antioxidant enzymes particularly involved in the $H_2O_2$ removal and the subsequent $H_2O$$_2$ accumulation could induce the Cd-induced phytotoxicity.

  • https://doi.org/10.5141/JEFB.2004.27.2.107 인용 PDF KSCI

Effects of arbuscular mycorrhizal fungi on enhancing growth, fruit quality, and functional substances in tomato fruits (Lycopersicon esculentum Mill.)

  • Thanapat Suebrasri;Wasan Seemakram;Chanon Lapjit;Wiyada Mongkolthanaruk;Sophon Boonlue
    • Journal of Plant Biotechnology
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    • v.50
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    • pp.239-247
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    • 2023

  • This study aimed to investigate the efficiency of arbuscular mycorrhizal fungi (AMF) in enhancing plant performance and bioactive compound concentrations in tomatoes (Lycopersicon esculentum Mill.). This factorial pot experiment included nine replications over 120 days of cultivation. Three AMF species (Rhizophagus prolifer, Claroideoglomus etunicatum, and Acaulospora mellea) were utilized as inoculum, while non-mycorrhizal controls with or without synthetic NPK fertilizer were compared. Interestingly, C. etunicatum KS-02 inoculations effectuated the best fruit growth and weight, which were statistically higher than those of the control without AMF. However, only fruit fresh weight was higher in plants inoculated with C. etunicatum KS-02 than those treated with the synthetic NPK fertilizer. In addition, C. etunicatum KS-02 inoculations induced a ≥ 11% increase in DDPH (1,1-diphenyl-2-picrylhydrazyl) activity, lycopene content, and carotenoid content compared to the control. This study is the first to report Claroideoglomus species' effectiveness in promoting growth, fruit yield, and bioactive compound production in L. esculentum Mill. These findings substantiate the significant potential of C. etunicatum KS-02 for tomato cultivation without the adverse effects of excessive synthetic fertilizer use.

  • https://doi.org/10.5010/JPB.2023.50.030.239 인용 PDF

Glyphosate Toxicity: I. Long Term Analysis of Shikimic Acid Accumulation and Chlorophyll Degradation in Tomato Plant (Glyphosate 독성(毒性): I. Glyphosate 처리(處理)가 토마토의 Shikimic Acid의 축적(蓄積)과 엽록소(葉綠素)의 분해(分解)에 미치는 영향(影響))

  • Kim, Tae-Wan;Amrhein, Nikolaus
    • Korean Journal of Weed Science
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    • v.15 no.2
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    • pp.141-147
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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). Glyphosate induced the rapid accumulation of shikimic acid within 24 h. The accumulation of shikimic acid companied with chlorophyll loss in meristematic leaves, i.e. apical leaves. The chlorosis was acropetal in apical region of young growing leaf. The degradation of chlorophyll seems to be a secondary or tertiary effect of glyphosate. However, the level of shikimic acid accumulated was reduced except for roots and apical leaves from 5 days after treatment. The accumulating levels are considerably differed through the applicated regions. The level of shikimic acid is highest at the apical meristem 4 days after the application to 3rd old leaf.

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