Chutipaijit, Sutee

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Preferred name
Chutipaijit, Sutee
Alternative Name
Chutipaijit, S.
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Email
sutee.ch@kmitl.ac.th

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    Nanocarbon induced modifications in morpho-physiopgical characteristics in rice plants [oryza sativa l. cv. black jasmine rice (Hom-nin)]
    (2020-01-01)
    Samart, Sutichai
    ;
    Chutipaijit, Sutee
    The aim of this research was to evaluate the potential application of nanocarbon in plant growth and physiological responses in rice plants. This research was designed to evaluate the effects of different concentration of nanocarbon (0-1,000 mg L<sup>-1</sup>) on growth characterizations and physiological parameters after 1-4 weeks of nanocarbon-treatment. Induction in the growth performances and contents of photosynthetic pigments (chlorophyll A, chlorophyll B and carotenoids), antioxidant enzyme activities (catalase and peroxidase) and flavonoids was observed in the rice plants after treated with nanocarbon. The results showed that nanocarbon promoted the plant growth in rice plants cv. Black jasmine rice or Hom-nin by increasing the shoot lengths and dry weights. The significant increase of shoot length and dry weight were found in 200 and 600 mg L<sup>-1</sup> nanocarbontreatments. Additionally, the high contents of photosynthetic pigment concentrations in treated-plants showed significant difference at 600 mg L<sup>-1</sup> nanocarbon compared to the control (0 mg L<sup>-1</sup> nanocarbon). The antioxidant activities of catalase and peroxidase enzymes in nanocarbon treated-plants were significantly increased compared to the control. Furthermore, the induction of flavonoid contents in treated-plants was increased by 200 and 600 mg L<sup>-1</sup> nanocarbon. The results suggested that nanocarbon able to promote the biomass and has benefit to increase the photosynthetic pigments and antioxidant enzymes for plant growth performances. This research provided plant growth and physiological responses evidence on the beneficial effect of nanocarbon in rice plants, especially Black jasmine rice or Hom-nin cultivar.
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    Assessment of antioxidant enzymes in response to exogenous titanium dioxide (TiO2) nanoparticles in Chainat 1 rice cultivar
    (2018-01-01)
    Samart, Sutichai
    ;
    Phakamas, Nittaya
    ;
    Chutipaijit, Sutee
    Antioxidant enzymes are important to prevent the destruction of photosynthetic pigments in plant cells. There have been reported that ZnO nanoparticles can promote activities of antioxidant enzymes in rice, but should not use in high activities because it can cause toxicity. Therefore, the objective of this study was to investigate the effect of titanium dioxide (TiO<inf>2</inf>) nanoparticles on the activities of antioxidant enzymes in Chainat 1 rice cultivar. Rice plants were treated with TiO<inf>2</inf> nanoparticles using different concentrations i.e., 0, 100, 200, 400, 600 and 800 mg.L<sup>-1</sup> for every 7 days-interval. Photosynthetic pigment contents (chlorophyll A, chlorophyll B and carotenoid) and activities of antioxidant enzymes (catalase and peroxidase) were recorded at 37, 44 and 51 days after planting. The results showed that the treatment of TiO<inf>2</inf> nanoparticles was not effect on the quantities of chlorophyll A, chlorophyll B and carotenoids, but found that the activities of peroxidase and catalase enzymes were significant affected at all growth stages. Especially, at a concentration of 200 mg.L<sup>-1</sup> TiO<inf>2</inf> found that rice plants contained the highest activities of peroxidase enzyme and significant difference from control treatment. However, the treatments of higher dose than 200 mg.L<sup>-1</sup> TiO<inf>2</inf> would have a chance to meet toxicity in rice plants as the activities of antioxidant enzymes were decreased.