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Asian Journal of Plant Sciences
  Year: 2005 | Volume: 4 | Issue: 2 | Page No.: 85-89
DOI: 10.3923/ajps.2005.85.89
 
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Phenotypic Responses of Thai Jasmine Rice to Salt-stress under Environmental Control of in vitro Photoautotrophic System

Suriyan Cha-um, Kanyaratt Supaibulwattana and Chalermpol Kirdmanee

Abstract:
Rice crop response to salt stress is well known to involve multifunction mechanisms, which is dramatically regulated by various environmental factors. To reduce the uncontrolled environmental signals, the phenotypic responses of rice crop to salt stress were investigated under an in vitro environmental engineering system. The chlorophyll a, chlorophyll b, carotenoid, flavonoid and anthocyanin concentrations of seedlings cultured under acidic pH and low Relative Humidity (RH) with salt-stress conditions were sharply reduced by the factors of 2.26, 2.04, 2.15, 1.60 and 1.49 folds, respectively when compared to those cultured under neutral pH and high RH without salt-stress conditions. Degradation on pigment concentrations of rice seedlings positively related to the net-photosynthetic rate reduction (r = 0.94), led to growth retardation i.e. leaf area, shoot height, fresh and dry weights. The environmental factors of in vitro culture system such as extreme pH and RH should exhibit their realistic phenotypic responses to salt-stress that further applied for salt-tolerant screening.
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How to cite this article:

Suriyan Cha-um, Kanyaratt Supaibulwattana and Chalermpol Kirdmanee, 2005. Phenotypic Responses of Thai Jasmine Rice to Salt-stress under Environmental Control of in vitro Photoautotrophic System. Asian Journal of Plant Sciences, 4: 85-89.

DOI: 10.3923/ajps.2005.85.89

URL: https://scialert.net/abstract/?doi=ajps.2005.85.89

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