Carbon assimilation characteristics of plants in oasis-desert ecotone and their response to CO2 enrichment
文献类型：期刊论文
| 作者 | Su, PX; Chen, HS; An, LZ; Liu, XM |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2004-08-01 |
| 卷号 | 47页码:39-49 |
| 关键词 | oasis-desert ecotone carbon assimilation stable carbon isotope ratio photoinhibition CO2 enrichment |
| ISSN号 | 1006-9313 |
| DOI | 10.1360/04zd0005 |
| 通讯作者 | Su, PX(supx@ns.lzb.ac.cn) |
| 英文摘要 | Six species of more than 20-year-old desert woody plants in the oasis-desert ecotone were selected for study. The results showed that: (1) in different growing seasons delta(13)C values of assimilating organ varied between -14parts per thousand and -16parts per thousand for Haloxylon ammodendron (HA), -14parts per thousand - -15parts per thousand for Calligonum mongolicum (CM and -25parts per thousand - -28parts per thousand for Caragana korshinskii (CK), Nitraria sphaerocarpa (NS) and Hedysarum scoparium (HS). (2) The net photosynthetic rate (Pn) of HA and CM was significantly higher than those of the other species. With the decrease in Pn for the six species, their intercellular CO2 concentration increased, but stomatal limitation value decreased under the intensive light. At the same time, the photochemical efficiency of PS II dropped to different degrees. (3) The CO2 enrichment experiment demonstrated that, Pn of HA and CM increased to different extent under 450 mumol/mol, but their Pn reduced or approximated to the current condition under 650 mumol/mol. Under 450 mumol/mol the efficiency for solar energy utilization of CK and HS significantly reduced and under 650 mumol/mol their respiration rate exceeded photosynthesis rate. It can be concluded that HA and CM have some function of pathway for C-4, but the other three species have the function for C-3. The decline in their Pn is mainly caused by non-stomatal factors. HA, CM, CK and HS exhibited photoinhibition, which disappeared in a short time. This is a kind of positive readjustment to adapting to the desert environment. HA and CM can adapt to the high CO2 environment, but CK and HS cannot. With the rise in atmospheric CO2 concentration and climate warming, the latter two species in the oasis-desert ecotone may be gradually degraded or even disappear. |
| 收录类别 | SCI |
| WOS关键词 | ISOTOPE DISCRIMINATION ; C-4 PHOTOSYNTHESIS ; C-13/C-12 RATIOS ; PHOTOSYSTEM-II ; GAS-EXCHANGE ; PHOTOINHIBITION ; CHENOPODIACEAE ; TEMPERATURE ; CONDUCTANCE ; GRASSES |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000224381400005 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555643 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Su, PX |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, PX,Chen, HS,An, LZ,et al. Carbon assimilation characteristics of plants in oasis-desert ecotone and their response to CO2 enrichment[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2004,47:39-49. |
| APA | Su, PX,Chen, HS,An, LZ,&Liu, XM.(2004).Carbon assimilation characteristics of plants in oasis-desert ecotone and their response to CO2 enrichment.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,47,39-49. |
| MLA | Su, PX,et al."Carbon assimilation characteristics of plants in oasis-desert ecotone and their response to CO2 enrichment".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 47(2004):39-49. |
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来源：寒区旱区环境与工程研究所
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