Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/12-0006.1 |
Variation in photosynthetic response to temperature in a guild of winter annual plants | |
Gremer, Jennifer R.1; Kimball, Sarah2; Angert, Amy L.3; Venable, D. Lawrence1; Huxman, Travis E.1,2,4 | |
通讯作者 | Gremer, Jennifer R. |
来源期刊 | ECOLOGY |
ISSN | 0012-9658 |
出版年 | 2012 |
卷号 | 93期号:12页码:2693-2704 |
英文摘要 | How species respond to environmental variation can have important consequences for population and community dynamics. Temperature, in particular, is one source of variation expected to strongly influence plant performance. Here, we compared photosynthetic responses to temperature across a guild of winter annual plants. Previous work in this system identified a trade-off between relative growth rate (RGR) and water-use efficiency (WUE) that predicts species differences in population dynamics over time, which then contribute to long-term species coexistence. Interestingly, species with high WUE invest in photosynthetic processes that appear to maximize carbon assimilation, while high-RGR species appear to maximize carbon gain by increasing leaf area for photosynthesis. In high-WUE species, higher rates of carbon acquisition were associated with increased investment into light-driven electron transport (J(max)). We tested whether such allocation allows these plants to have greater photosynthetic performance at lower temperatures by comparing the temperature sensitivity of photosynthesis across species in the community. Six species were grown in buried pots in the field, allowing them to experience natural changes in seasonal temperature. Plants were taken from the field and placed in growth chambers where photosynthetic performance was measured following short-term exposure to a wide range of temperatures. These measurements were repeated throughout the season. Our results suggest that high-WUE species are more efficient at processing incoming light, as measured by chlorophyll fluorescence, and exhibit higher net photosynthetic rates (A(net)) than high-RGR species, and these advantages are greatest at low temperatures. Sampling date differentially affected fluorescence across species, while species had similar seasonal changes in A(net). Our results suggest that species-specific responses to temperature contribute to the WUE-RGR trade-off that has been shown to promote coexistence in this community. These differential responses to environmental conditions can have important effects on fitness, population dynamics, and community structure. |
英文关键词 | chlorophyll fluorescence desert annuals light-saturated electron transport photosynthesis quantum efficiency relative growth rate temperature response water-use efficiency |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000312892500019 |
WOS关键词 | DESERT ANNUALS ; GROWTH TEMPERATURE ; CHLOROPHYLL FLUORESCENCE ; PHENOTYPIC PLASTICITY ; POPULATION-DYNAMICS ; CONDUIT DIAMETER ; ARID ECOSYSTEMS ; USE EFFICIENCY ; TRADE-OFFS ; DROUGHT |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of Arizona ; Colorado State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172070 |
作者单位 | 1.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA; 2.Univ Calif Irvine, Ctr Environm Biol, Irvine, CA 92697 USA; 3.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA; 4.Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697 USA |
推荐引用方式 GB/T 7714 | Gremer, Jennifer R.,Kimball, Sarah,Angert, Amy L.,et al. Variation in photosynthetic response to temperature in a guild of winter annual plants[J]. University of Arizona, Colorado State University,2012,93(12):2693-2704. |
APA | Gremer, Jennifer R.,Kimball, Sarah,Angert, Amy L.,Venable, D. Lawrence,&Huxman, Travis E..(2012).Variation in photosynthetic response to temperature in a guild of winter annual plants.ECOLOGY,93(12),2693-2704. |
MLA | Gremer, Jennifer R.,et al."Variation in photosynthetic response to temperature in a guild of winter annual plants".ECOLOGY 93.12(2012):2693-2704. |
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