Abstract:
The aim of this research was to determine the effect of nano-TiO2 at different concentrations on the
morphological and physiological response of aromatic rice (Oryza sativa L.). Khao Dawk Mali 105 rice cultivar
(KDML105) were grown in NB medium supplemented with 100, 300, 500 and 1,000 mg L-1 nano-TiO2. Tissue
culture grown seedlings were used to investigate morphological characterization (%germination, shoot length
and root length parameters) and physiological characterization (photosynthetic pigments and antioxidant
enzymes parameters) in rice seedlings during 5-14 days after treatment conditions. Rice seedlings treated with
100 and 300 mg L-1 nano-TiO2 were increased the %germination (1.01-1.07-fold), shoot length (1.03-2.05-fold)
and root length (1.04-1.96-fold). Furthermore, the concentrations of photosynthetic pigments and the specific
activities of antioxidant enzymes showed an increase of chlorophyll A (1.02-1.75-fold), chlorophyll B (1.07-
2.10-fold) and carotenoids (1.10-1.87-fold) contents as well as catalase (1.05-1.35-fold) and peroxidase (1.11-
1.79-fold) enzyme activities in rice seedling treated with 100 and 300 mg L-1 nano-TiO2 when compared with
the untreated and treated with 500 and 1,000 mg L-1 nano-TiO2. The changes in the morphological
characterization showed a positive correlation with the physiological characterization in rice seedlings treated
with 100 and 300 mg L-1 nano-TiO2. The results indicated that the antioxidant enzyme system leads to more
effective roles in plant protection against nanomaterials stress which enhance their morphological and
physiological properties in plants.
สถาบันเทคโนโลยีปทุมวัน.สำนักห้องสมุด
Address:
กรุงเทพมหานคร
Email:
somsuay12@hotmail.com
Created:
2017
Modified:
2561-02-23
Issued:
2561-02-23
บทความ/Article
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BibliograpyCitation :
Pathumwan Academic Journal. Vol. 7, No. 18, (January - April 2017), p 27 - 39.