Interactive effects of CO2 enrichment and temperature on the growth of dioecious Hydrilla verticillata
Interactive effects of CO2 enrichment and temperature on the growth of dioecious Hydrilla verticillata
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DOI：
10.1016/0098-8472(94)90016-7
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发表时间：
1994-10
影响因子：
5.7
通讯作者：
De Chen;M. Coughenour;Debra R. Eberts;J. Thullen
中科院分区：
文献类型：
--
作者：
De Chen;M. Coughenour;Debra R. Eberts;J. Thullen
在生长箱中进行了植物生长对不同CO2浓度和温度的响应实验，探讨大气CO2浓度和温度对雌雄异株黑藻[Hydrilla verticillata（L.f.）]生长和干物质分配的交互影响在12小时光周期下，将水螅植物暴露于两种大气CO2浓度（350和700 ppm）和三种温度（15、25和32°C）约2个月。植物生长分析表明，CO2浓度升高对黑藻的生长有促进作用，且这种促进作用的百分比具有强烈的温度依赖性。在700 ppm CO2和32°C下实现最大生物质产量。在15°C下，CO2加倍使总干物质产量增加约27%，这是由于叶生物量增加26%，茎生物量增加34%，根生物量增加16%。在25°C下，CO2加倍使干物质产量增加约46%，这是由于叶生物量增加29%，茎生物量增加27%，根生物量增加40%。然而，在32°C时，CO2加倍对总干物质产量的提高比例仅为7%左右。干物质在植株不同部位间的分配受温度的影响，而不受CO2浓度升高的影响。
Experiments of plant growth responses to different CO2concentrations and temperatures were conducted in growth chambers to explore the interactive effects of atmospheric CO2enrichment and temperature on the growth and dry matter allocation of dioeciousHydrilla [Hydrilla verticillata(L.f.) Royle].Hydrillaplants were exposed to two atmospheric CO2concentrations (350 and 700 ppm) and three temperatures (15, 25 and 32°C) under a 12-hr photoperiod for about 2 months. The plant growth analysis showed that elevated CO2appeared to enhance the growth ofHydrilla, and that the percentage of the enhancement is strongly temperature-dependent. Maximum biomass production was achieved at 700 ppm CO2and 32°C. At 15°C, the total dry matter production was increased about 27% by doubling CO2, due to a 26% enhancement of leaf biomass, a 34% enhancement of stem biomass and 16% enhancement of root biomass. At 25°C, the dry matter production was increased about 46% by doubling CO2, due to a 29% enhancement of leaf biomass, a 27% enhancement of stem biomass and 40% enhancement of root biomass. At 32°C, however, the percentage of the enhancement of total dry matter production by doubling CO2was only about 7%. The dry matter allocation among different plant parts was influenced by temperature but not by elevated CO2concentration.