| 引用本文: | 施娴,陈开宁,黄蔚,杨鑫.不同温度培养下莕菜(Nymphoides peltata)生长与光合作用特征.湖泊科学,2013,25(4):545-550. DOI:10.18307/2013.0412 |
| SHI Xian,CHEN Kaining,HUANG Wei,YANG Xin.Growth and photosynthesis characteristics of the Nymphoides peltata under different temperatures. J. Lake Sci.2013,25(4):545-550. DOI:10.18307/2013.0412 |
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| 不同温度培养下莕菜(Nymphoides peltata)生长与光合作用特征 |
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施娴1,2, 陈开宁1, 黄蔚1,2, 杨鑫1,2
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1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院大学, 北京 100049
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| 摘要: |
| 以太湖东山与西山之间水域的莕菜根茎为实验材料,在室内分别进行3种温度(28、30、32℃)处理,利用Li-6400便携式光合作用测量系统,分别测定3种温度处理下莕菜的光响应曲线和CO2响应曲线,并且利用非直角双曲线法进行拟合,得到相关参数.结果表明,3种温度下,莕菜的光合能力大小顺序表现为30℃ >32℃ >28℃,羧化效率为32℃ >30℃ >28℃,蒸腾速率、气孔导度均为30℃ >28℃ >32℃;28、30和32℃下的单位叶片生物量分别为0.0019±0.0002、0.0021±0.0003、0.0020±0.0003 g(DW)/cm2,叶片及其单位面积生物量为30℃ >28℃ >32℃,但差异不显著;30℃下的根、茎干重显著高于另外2个温度下的.在低于30℃的温度条件下,随着温度的升高,莕菜的光合能力均明显升高,促进了植物的生长;而当温度超过30℃后,光合作用效率降低,植物的生长则受到抑制.在适宜温度范围内(<30℃),小幅度的升温(2℃)产生了显著的积温效应(200℃·d),促进了莕菜的生长.因此推断,1998 2006年太湖地区平均气温升高约1.0℃的现象对近年来太湖莕菜的大面积扩张可能具有促进作用. |
| 关键词: 莕菜 光合作用 生物量 积温 |
| DOI：10.18307/2013.0412 |
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| 基金项目:国家自然科学基金项目(41171413);国家水体污染控制与治理科技重大专项项目(2012ZX07103-002)联合资助 |
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| Growth and photosynthesis characteristics of the Nymphoides peltata under different temperatures |
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SHI Xian1,2, CHEN Kaining1, HUANG Wei1,2, YANG Xin1,2
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1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.University of Chinese Academy of Sciences, Beijing 100049, P.R.China
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| Abstract: |
| Roots of Nymphoides peltata collected from Lake Taihu were cultured under three different temperatures (28,30, 32℃).The biomass under such different temperature conditions were 0.0019±0.0002,0.0021±0.0003 and 0.0020±0.0003 g (DW)/cm2,respectively.Meanwhile,the dry weight of stem and root was maximum under 30℃ than other treatments that had significant difference;the order of the dry weight and biomass per unit area of leave was 30℃ > 28℃ > 32℃.Light response curves and ACI curves were determined by a Li-6400 portable photosynthesis analysis system,and the non-rectangular hyperbolic method was used to fit the curve to obtain relevant photosynthetic parameters.The results showed that the influences of temperature on order of N.peltata photosynthetic capacity was 30℃ > 32℃ > 28℃,the order of carboxylation efficiency was 32℃ > 30℃ > 28℃,transpiration efficiency and stomatal conductance showed the same trend,30℃ > 28℃ > 32℃.The photosynthetic capacity of N.peltata increased significantly with the increasing temperature,and the growth of N.peltata was promoted;however,the photosynthetic efficiency reduced when the temperature exceeded 30℃ with the suppression of N.peltata.In the appropriate temperature range(< 30℃),small amplitude warming(2℃) produced a significant effect of accumulated temperature(200℃·d), which promote the growth of N.peltata.It is deduced that the phenomenon that the average temperature of Lake Taihu increased about 1℃ during 1998 2006 may promote the expansion of N.peltata in Lake Taihu in recent years. |
| Key words: Nymphoides peltata photosynthesis biomass accumulated temperature |
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