Teerarak, Montinee

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Teerarak, Montinee
Alternative Name
Teerarak, M.
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Email
montinee.te@kmitl.ac.th

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    Item type:Publication,
    The impact of sodium chloride on root growth, cell division, and interphase silver-stained nucleolar organizer regions (AgNORs) in root tip cells of Allium cepa L.
    (2009-06-17)
    Teerarak, Montinee
    ;
    Bhinija, Kisana
    ;
    Thitavasanta, Sompop
    ;
    Laosinwattana, Chamroon
    To evaluate genetic damage, parameters including root growth, chromosomal aberrations, and interphase silver-stained nucleolar organizer regions (AgNORs) in root tip cells of Allium cepa L. were investigated after treatment with NaCl (40-160 mM). The results showed that NaCl caused a decrease in root growth. All concentrations of NaCl showed an inhibitory effect on dividing cells in root tips of A. cepa L. and caused a reduction in mitotic index values. Upon exposure to NaCl, roots exhibited various mitotic abnormalities, including c-mitosis, anaphase bridge, and chromosome stickiness. In addition, interphase cells with micronuclei, budding nuclei, and unequal-sized nuclei were observed. Moreover, total cell aberration increased with increasing NaCl concentration. For AgNOR parameters, the average number of AgNORs per nucleus decreased in roots treated at all NaCl concentrations. The singular AgNOR area and whole AgNOR area in the nucleus containing 1-3 AgNORs were inversely proportional to NaCl concentrations. © 2009 Elsevier B.V. All rights reserved.
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    Allelopathic potential of Chinese rice flower (aglaia odorata Lour.) as organic herbicide
    (2009-01-01)
    Laosinwattana, C.
    ;
    Poonpaiboonpipat, T.
    ;
    Teerarak, M.
    ;
    Phuwiwat, W.
    ;
    Mongkolaussavaratana, T.
    The aqueous extracts of leaf and branches of Aglaia odorata inhibited the germination and seedling growth of bamyardgrass (Echinochloa crus-galli (L.) Beauv.) and wild pea (Phaseolus lathyroides L.) over the control. Besides its dry leaf powder (31.25, 62.5, 125 and 250 mg/plate) was more inhibitory to these parameters than aqueous extract. Furthermore, the inhibitory effects of dried leaf pellets of Chinese rice flower were more stronger than dried leaf powders at equal rates. The pellets applied at 0.5 ton ha<sup>-1</sup> dose as soil surface mulch inhibited the seedlings emrgence of banyardgrass and wild pea by 67% and 2%, respectively. Thus the Chinese rice flower pellets has the potential to act as organic herbicide for control of bamyardgrass weed.