Variation in photosynthetic characteristics of Cyclocarya paliurus seedlings from different provenances

doi:10.3969/j.jssn.1000-2006.2012.04.008

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2012, Vol. 36 ›› Issue (04): 41-45.doi: 10.3969/j.jssn.1000-2006.2012.04.008

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Variation in photosynthetic characteristics of Cyclocarya paliurus seedlings from different provenances

YANG Ruiqing^1,2, CHU Xiuli^1,3, YANG Wanxia¹, SHANG Xulan¹, FANG Shengzuo^1*, CHE Shaohui³

1.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 2.Shanghai City Green Management Guidance Station, Shanghai 200020, China; 3.Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091

Online:2012-07-07 Published:2012-07-07

Abstract

Abstract: The photosynthetic characteristics of Cyclocarya paliurus from twelve selected provenances were measured with Li Cor-6400 potable photosynthesis system. The results were as follows: The diurnal dynamic of photosynthesis rate(P_n)and transpiration rate(T_r)displayed a 2-peak “M” shaped curve which appeared at around 10:00 and 14:00 respectively. However, CO₂ concentration between cells showed a “W” shaped curve which exactly opposite to the P_n and T_r curve. Stomatal conductance had max value at 6:00 but decreased quickly after then. However, it displayed same trend with P_n and T_r after 8:00. Water use efficiency(WUE)increased before 8:00 and after 12:00, but decreased during the period of 8:00-12:00. There were significant differences in the photosynthetic characteristics among different provenances selected. By using the significant differed photosynthesis characteristics to do the Fuzzy mathematics analysis, Kunming, Anji, Lushan, Ziyuan and Shucheng were considered the superior ones cultivated in Jiangsu province.

CLC Number:

S718.4

YANG Ruiqing, CHU Xiuli, YANG Wanxia, SHANG Xulan, FANG Shengzuo, CHE Shaohui. Variation in photosynthetic characteristics of Cyclocarya paliurus seedlings from different provenances[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2012, 36(04): 41-45.

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Variation in photosynthetic characteristics of Cyclocarya paliurus seedlings from different provenances

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