KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Sompornpailin, KanokpornSubject: search.filters.subject.Indica rice

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    High contents of proline and anthocyanin increase protective response to salinity in Oryza sativa L. spp. indica
    (2011-09-01)
    Chutipaijit, Sutee
    ;
    Cha-um, Suriyan
    ;
    Sompornpailin, Kanokporn
    Pigmented rice cultivar is a good candidate for abiotic tolerance especially salt tolerant trait. Physiological and growth parameters of eight indica rice genotypes under control or salt stress conditions were subjected to Hierarchical cluster analysis. From cluster ranking, rice genotypes were classified into two groups, salt-tolerant (Sangyod, Khao Dang, Kulab Dang and TD49) and salt-sensitive genotypes (Klum Sakol, Klum Khonkaen1, Klum Khonkaen2 and Black Sticky Rice). In salt stress (100 mM NaCl), the salt-tolerant genotypes showed the high percentages of proline and anthocyanin more than in the salt-sensitive genotypes. In addition, the photosynthetic pigment stabilizations of stressed-seedlings were positively correlated to the proline (R <sup>2</sup> = 0.98) and anthocyanin (R <sup>2</sup> = 0.70) accumulations. While, the malondialdehyde (MDA) contents of salt-stressed seedlings were negatively correlated to the proline (R <sup>2</sup> = 0.63) and anthocyanin (R <sup>2</sup> = 0.51) accumulations. Moreover, the total antioxidant activity of extraction from stressed-seedlings was assessed using the ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) method. The higher percentages of total antioxidant activity were determined in salt-tolerant (125-199%) than salt-sensitive genotypes (106-113%). From the results it can be concluded that accumulation of above mentioned metabolites is associated with cellular protection and salt detoxification in salinity rice seedlings.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Proline accumulation and physiological responses of indica rice genotypes differing in tolerance to salt and drought stresses
    (2010-06-01)
    Chutipaijit, Sutee
    ;
    Suriyan, Cha Um
    ;
    Sompornpailin, Kanokporn
    The study determined the relationship between proline accumulation and physiological responses of indica rice genotypes to salt and drought stresses in photoautotrophic conditions. Two salt-tolerant genotypes of indica rice [cv. jasmine rice (KDML 105) and Dang], two drought-tolerant genotypes [Rice Department 6 (RD6) and Rice Department 15 (RD15)] and a salt-and drought-sensitive genotype [Pathumthani 1 (PT 1)] were exposed to 100 mM NaCl (salt stress) or 100 mM mannitol (drought stress) for 4 d. The relative water content (RWC) and malondialdehyde (MDA) accumulation in salt-and drought-tolerant genotypes did not significantly change. The proline accumulation in these genotypes greatly increased with stress. On the other hand, the salt-and drought-sensitive genotype which had lower proline accumulation demonstrated a significant decrease in RWC and increase in MDA content. Moreover, our results showed a strong correlation between proline concentrations and free radical scavenging by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The high concentration of proline solution presented high DPPH antioxidant activity. The higher proline accumulation in stressed seedlings of tolerant genotypes may help to maintain the RWC and MDA of rice plant, which could lead to preferable growth performance.