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| Content Provider | Springer Nature Link |
|---|---|
| Author | Liu, X.Q. Wang, R.Z. Li, Y.Z. |
| Copyright Year | 2004 |
| Abstract | Photosynthetic pathway types, based on δ$^{13}$C measurements, were determined for 125 species in 95 genera and 32 families growing in rangelands from Inner Mongolia. Of the total species, 4 species from 3 genera and 2 families had C$_{4}$ photosynthesis (2 species in Gramineae and 2 in Chenopodiaceae) and 118 species from 90 genera and 31 families had C$_{3}$ photosynthesis. The number of C$_{4}$ species differed significantly among four rangeland sites, 4 species in desert, 3 species in steppe, but no C$_{4}$ species were identified in meadow and dune. Six species [e.g. Agriophyllum arenarium Bieb., Bassia dasyphylla O. Kuntze, Saussurea japonica (Thunb.) DC.] earlier identified as C$_{4}$ species using the enzyme ratio method were found as C$_{3}$ species using the carbon isotope ratios (δ$^{13}$C). Hence the enzyme ratio method for C$_{3}$ and C$_{4}$ identification may not always be reliable. The δ$^{13}$C values of 3 species of Crassulaceae, which had been considered as CAM species, differed remarkably [−25.79 ‰ for Sedum aizoon L., −24.42 ‰ for Osostachys fimbriatus (Turcz.) Berger, and −16.97 ‰ for O. malacophyllus (Pall.) Fisch], suggesting that the use of δ$^{13}$C method as a diagnosis for CAM photosynthetic pathway type may not always be reliable and supplementary measurements are needed. |
| Starting Page | 339 |
| Ending Page | 344 |
| Page Count | 6 |
| File Format | |
| ISSN | 03003604 |
| Journal | Photosynthetica |
| Volume Number | 42 |
| Issue Number | 3 |
| e-ISSN | 15739058 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2004-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Plant Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science |
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