JOURNAL OF BEIJ ING FORESTRY UNIVERSITY

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1 JOURNAL OF BEIJ ING FORESTRY UNIVERSITY Vol. 30, No. 4 Jul., ,2 1 1 (1 2 ) : 3,,7129,; 20124, ;75100, (10 ) (1 ),Logistic ( LT 50 ), , ,,,, : ; ; ; :S71813 :A : (2008) RUAN Zhi2ping 1,2 ; XIANG Ping 1 ; LI Zhen2ji 1. Cold tolerance of Butia capitata, Acoelorrhaphe wrightii and Elaeis guineensis. Journal of Beijing Forestry University (2008) 30 (4) [ Ch, 22 ref. ] 1 College of Life Sciences,Xiamen University,Fujian Province,361005,P. R. China ; 2 Xiamen Botanical Garden,Fujian Province,361005,P. R. China. Cold tolerances of Butia capitata, Acoelorrhaphe wrightii and Elaeis guineensis were studied during the winter (October of 2005 to January of 2006) in Xiamen City by cold injury index,electrolyte leakage and semi2 lethal low temperature. The results show that the cold injury indices ( CI) of B. capitata, A. wrightii and E. guineensis were 7129,20124 and 75100,respectively. The electrolyte leakage of leaves was measured in October and January under different temperatures,and the semi2lethal low temperature (L T 50 ) of leaves was assayed in different sampling periods by Logistic equation. The L T 50 of B. capitata, A. wrightii and E. guineensis were , and in October, and were , and in January,respectively. The results indicate that the sequence of the cold tolerance is as follows : B. capitata > A. wrightii > E. guineensis. Key words palm ; electrolyte leakage ; semi2lethal low temperature ; cold resistance (Palmae),,,, [1 ],,, l6 85, 818 % [2 ],,, [3225 ],, [6 ], , ,,,, [7 ],,, : http :ΠΠwww. bjfujournal. cn,http :ΠΠjournal. bjfu. edu. cn : :,, : : com. cn : :, : : com :

2 78 30 [82217 ], 3,,,,, 1 111,24 24 N, E,,1916, mm , TABLE 1 Average and lowest temperatures of Xiamen City from October 2005 to January ( Butia capitata Becc. ) ( Acoelorrhaphe wrightii ( Griseb. & H. Wendl. ) H. Wendl. ex Becc. ) ( Elaeis guineensis Jacq. ),,,, 10 g,, ,,, 30,, 5 (2), CI CI = n iw i Π( NW max ) (1), n i, W i, N, W max : [18 ], 1),, 2 TABLE 2 Evaluation standard of cold injury to palm in Xiamen City ,, 1Π3,,,,, 2Π3,,,, ( ), 4 8,,( 3 cm ) 6, A1 A2 A3 A4 A5 A6, 3 g, 3, 2) Polyscience 9610, h 3) 4 30 min, 8 ml, 4 h,, DS222 1 ( C 1 ) ; 10 min, 24 h, 2 ( C 2 ),,3 Y = ( C 1 - C w )Π( C 2 - C w ) (2), Y ( %), C 1 C 2 C w 1 2 (cmπs) 4) Logistic, Y = KΠ(1 + ae - bt ) (3), t ( ), K a b 114 SPSS1115, Logistic, ,,3,,,1

3 4 : 79 ( 617 %) 2 ( 313 %),,,7129,, 2, 4617 %,20124,,, 3 4, 5010 %, 75100,, 3 3 TABLE 3 Comparison of cold injury grades to three palm species leaves in Xiamen City Π % Π % Π % Π % Π % ( ) 4,, S (1), - 8, , - 10, % ; - 2-4,- 4, % ; - 2,45110 % Logistic, (LT 50 ), ; ; (6), > > % TABLE 4 Changes of electrolyte leakages of three palm species leaves under different temperatures in October 2005 Π : FIGURE 1 Changes of electrolyte leakages of B. capitata,a. wrightii and E. guineensis in October ( ) 3 5,2, , , - 14, %, % ; - 6-8,- 8,50160 % ; - 2-4, - 4,50 % Logistic, S ( L T 50 ), L T ; L T ; L T (6) > > % TABLE 5 Changes of electrolyte leakages of three palm species leaves under different temperatures in January 2006 Π

4 FIGURE 2 Changes of electrolyte leakages of B. capitata, A. wrightii and E. guineensis in January 214 S, LT 50 TABLE 6 Relationships between electrolyte leakage and temperature and semi2lethal low temperature (LT 50 ) of three palm species Logistic LT 50 R 2 Y = Π( e x ) Y = Π( e x ) Y = Π( e x ) Y = Π( e x ) Y = Π( e x ) Y = Π( e x ) ,3 L T 50 L T 50,,, L T 50, ; L T , 1157, ; L T ,- 2194,,0175,,,,;, 3 L T ,L T ,,, 3 Lyons [19 ],,,,,,,,, , , - 10,, - 10, 1 3,,,,,,,, , - 117,- 4,, 215,,,, [20 ],3, [212222],,,, [14,16],,,,,,

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