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KMID : 1098420090170050328
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Korean Journal of Medicinal Crop Science
2009 Volume.17 No. 5 p.328 ~ p.334
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Growth and Abscisic Acid Changes of Creeping Thyme in the Exposure of NaCl and Drought
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Kim Min-Jea
Eom Seok-Hyun
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Abstract
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Experimental purpose was to evaluate growth characteristic and abscisic acid (ABA) responses against salt/ drought stresses. In the shoot biomass, creeping thyme was tolerated in mild NaCl stress, ranging 0 to 100 mM, while it was severely reduced in higher salinity. Under constant drought stress, the shoot biomass of creeping thyme showed a worse value compared to that of 100 mM NaCl treatment. Chlorophyll degradation was more severe in immature leaf than mature leaf under salt and drought stresses. In salt stress, immature leaf produced much amounts of ABA compared to mature leaf and also immature leaf showed faster increase of ABA than that of mature leaf. In drought stress, immature leaf responded to stress within 24 hours by the increase of ABA, while mature leaf responded to at 72 hours. Our results recommended that the optimal salinity level of creeping thyme was 50~100 mM NaCl.
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KEYWORD
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Abscisic Acid, Biomass, Chlorophyll content, Creeping Thyme, Salinity, Water Deficit
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