Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1071/FP20305 |
| CAM photosynthesis in desert blooming Cistanthe of the Atacama, Chile | |
| Holtum, Joseph A. M.; Hancock, Lillian P.; Edwards, Erika J.; Winter, Klaus | |
| 通讯作者 | Holtum, JAM (corresponding author), James Cook Univ, Coll Sci & Engn, Townsville, Qld 4811, Australia. ; Holtum, JAM (corresponding author), Smithsonian Trop Res Inst, POB 0843-03092, Balboa, Ancon, Panama. |
| 来源期刊 | FUNCTIONAL PLANT BIOLOGY
 |
| ISSN | 1445-4408 |
| EISSN | 1445-4416 |
| 出版年 | 2021 |
| 卷号 | 48期号:7页码:691-702 |
| 英文摘要 | When plants of the Atacama desert undergo episodic blooms, among the most prominent are succulent-leaved Cistanthe (Montiaceae). We demonstrate that two Cistanthe species, the perennial Cistanthe sp. aff. crassifolia and the annual/biannual Cistanthe sp. aff. longiscapa, can exhibit net CO2 uptake and leaf acidification patterns typical of crassulacean acid metabolism (CAM). In C. sp. aff. crassifolia leaves, CAM expression was facultative. CAM-type nocturnal net CO2 uptake and acid accumulation occurred in drought-stressed but not in well-watered plants. By contrast, CAM expression in C. sp. aff. longiscapa was largely constitutive. Nocturnal acid accumulation was present in leaves of well-watered and in droughted plants. Following water-deficit stress, net nocturnal CO2 uptake was induced and the level of acid accumulated increased. Neither nocturnal CO2 uptake nor acid accumulation was reduced when the plants were re-watered. delta C-13 values of a further nine field-collected Cistanthe species are consistent with a contribution of CAM to their carbon pools. In the Portulacinae, a suborder with eight CAM-containing families, Cistanthe becomes the sixth genus with CAM within the family Montiaceae, and it is likely that the ancestor of all Portulacineae also possessed CAM photosynthesis. In the stochastic rainfall landscape of the Atacama, carbon uptake in the dark is a water-use efficient mechanism that increases the carbon pool available for seed production or dormancy. The next rain event may be years away. |
| 英文关键词 | CAM evolution crassulacean acid metabolism Cistanthe constitutive CAM drought facultative CAM Montiaceae delta C-13 values nocturnal succulent |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000643852000001 |
| WOS类目 | Plant Sciences |
| WOS研究方向 | Plant Sciences |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/350346 |
| 作者单位 | [Holtum, Joseph A. M.] James Cook Univ, Coll Sci & Engn, Townsville, Qld 4811, Australia; [Holtum, Joseph A. M.; Winter, Klaus] Smithsonian Trop Res Inst, POB 0843-03092, Balboa, Ancon, Panama; [Hancock, Lillian P.] Brown Univ, Dept Ecol & Evolutionary Biol, Box G-W, Providence, RI 02912 USA; [Edwards, Erika J.] Yale Univ, Dept Ecol & Evolutionary Biol, POB 208105, New Haven, CT 06520 USA |
| 推荐引用方式 GB/T 7714 | Holtum, Joseph A. M.,Hancock, Lillian P.,Edwards, Erika J.,et al. CAM photosynthesis in desert blooming Cistanthe of the Atacama, Chile[J],2021,48(7):691-702. |
| APA | Holtum, Joseph A. M.,Hancock, Lillian P.,Edwards, Erika J.,&Winter, Klaus.(2021).CAM photosynthesis in desert blooming Cistanthe of the Atacama, Chile.FUNCTIONAL PLANT BIOLOGY,48(7),691-702. |
| MLA | Holtum, Joseph A. M.,et al."CAM photosynthesis in desert blooming Cistanthe of the Atacama, Chile".FUNCTIONAL PLANT BIOLOGY 48.7(2021):691-702. |
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