Dynamics of photosynthesis in Eichhornia crassipes Solms of Jiangsu of China and their influencing factors
文献类型: 外文期刊
第一作者: Li Xia
作者: Li Xia;Zheng Jianchu;Yan Shaohua;Ren Chenggang;Wang Man;Cong Wei;Sheng Jing;Zhu Puping
作者机构:
关键词: Eichhornia crassipes;photosynthetic characteristics;environmental influencing factors
期刊名称:AFRICAN JOURNAL OF BIOTECHNOLOGY ( 影响因子:0.573; 五年影响因子:0.794 )
ISSN: 1684-5315
年卷期: 2010 年 9 卷 43 期
页码:
收录情况: SCI
摘要: With LI-6400 portable photosynthesis system, the photosynthetic characteristics of artificially cultured Eichhornia crassipes in Jiangsu, China, were monitored from June 1 to November 14, 2009. Both the net photosynthetic rate (Pn) in different positions and light and temperature-response curves of the top fourth leaf were measured in an open-circuit gas channel system in June, July, and August, respectively. The top third to sixth leaves matured with a high Pn in August, 2009. The values of the maximum net photosynthesis (Pmax), light component point (LCP) and apparent quantum efficiency (AQE) of the top fourth leaf of E. crassipes were 34.5 +/- 0.72 and 20.25 +/- 3.6 mu mol m(-2)s(-1) as well as 0.0532 +/- 0.0014, respectively, significantly higher than those in rice and maize. The light-saturation point (LSP) of leaves of E. crassipes was 2358 +/- 69 mu mol m(-2)s(-1), significantly higher than that in rice and much close to that in maize. The natural light intensity and temperatures in Jiangsu are suitable for E. crassipes to rapidly grow but not good enough for it to show the maximum internal photosynthetic capacity from the perspective of photosynthetic physiology, thus resulting in its low biomass in this region.
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