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Photosynthetic Characteristics of Tetraploid and Diploid Eucommia ulmoides(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年06期
Page:
35-38
Research Field:
Publishing date:

Info

Title:
Photosynthetic Characteristics of Tetraploid and Diploid Eucommia ulmoides
Author(s):
LI Lei1; ZHANG Wei-chao1; GUO Jing2; GUO Bao-lin1
1.College of Forestry,Agricultural University of Hebei,Baoding,Hebei 071001;
2.College of Agronomy，Agricultural University of Hebei,Baoding,Hebei 071001
Keywords:
Eucommia ulmoides; tetraploid; diploid; photosynthetic characteristics
PACS:
S 567.1+9
DOI:
-
Abstract:
Diurnal variation of photosynthesis,light response curve and CO2 response curve were investigated leaves of tetraploid and diploid Eucommia ulmoides.by using Li-6400 portable photosynthesis analyzer system.The results showedthat diurnal change in net photosynthetic rate (Pn) of Eucommia ulmoides was a bimodal curve,the phenomenon of midday depression of photosynthesis were observed in the tetraploid and diploid.The maximum net photosynthetic rate(Pmax) of the tetraploid was significantly higher than that of the diploid during the whole daytime period,the annual photosynthetic rates (Pn) of mature Eucommia ulmoides leaves presented a bimodal curve,the maximum Pn appeared in June and August.The light compensation point of different Eucommia ulmoides was 18.00~27.78 μmol?m-2?s-1,light saturation point (LSP) was 1 216.67~1 240.00 μmol?m-2?s-1.The CO2compensation point (CCP) was 72.50~117.75 μmol/mol,and the CO2 saturation point (CSP) was 1 347.47~1 397.48 μmol/mol.The photosynthesis of the tetraploid Eucommia ulmoides was more active than that of the diploid.

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Last Update: 2014-08-29