Title: Studies on the Cold Resistance of Four Magnoliaceae Species in Guizhou Province
Abstract: The cold resistance of four Magnoliaceae species in Guizhou Province was studied by means of comparing the related physiological indices including TL50,MDA content and SOD activity under cold stress caused by gradient of low-temperature treatment in order to provide theoretical reference for the landscaping application of these native species.The results showed that the TL50 of each species was different,the lowest TL50 was-17.07 ℃ with Parakmeria lotungensis,while the highest TL50 was-6.38 ℃ with Tsoongiodron odorum.The first MDA peak value of each species all appeared above the TL50,and that of Tsoongiodron odorum appeared at the relatively highest temperature,whereas the first MDA peak value of Parakmeria lotungensis occurred at the relatively lowest temperature.The SOD activity of Tsoongiodron odorum substantially increased at the temperature between 5 ℃ and 4 ℃,but then decreased gradually after the temperature was lower than-4 ℃;The SOD activity of the rest three tree species changed less with the temperature variation.The cold resistance of the four species was ranked in the order as Parakmeria lotungensisMichelia chapensisMichelia crassipesTsoongiodron odorum in the light of above indices.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 2
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