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Peanut Photosynthesis Under Drought and Re-Watering
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lauriano, J. A. Ramalho, José C. Lidon, Fernando José Cebola Matos, M. Do Céu |
| Copyright Year | 2004 |
| Abstract | The photosynthetic response of three Arachis hypogaea L. cultivars (57-422, 73-30, and GC 8-35) grown for two months was measured under water available conditions, severe water stress, and 24, 72, and 93 h following re-watering. At the end of the drying cycle, all the cultivars reached dehydration, relative water content (RWC) ranging between 40 and 50 %. During dehydration, leaf stomatal conductance (gs), transpiration rate (E), and net photosynthetic rate (PN) decreased more in cvs. 57-422 and GC 8-35 than in 73-30. Instantaneous water use efficiency (WUEi) and photosynthetic capacity (Pmax) decreased mostly in cv. GC 8-35. Except in cv. GC 8-35, the activity of photosystem 1 (PS1) was only slightly affected. PS2 and ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO) were the main targets of water stress. After re-watering, cvs. 73-30 and GC 8-35 rapidly regained gs, E, and PN activities. Twenty-four hours after re-watering, the electron transport rates and RuBPCO activity strongly increased. PN and Pmax fully recovered later. Considering the different photosynthetic responses of the studied genotype, a general characterisation of the interaction between water stress and this metabolism is presented. |
| Starting Page | 37 |
| Ending Page | 41 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1023/B:PHOT.0000040567.42444.c2 |
| Volume Number | 42 |
| Alternate Webpage(s) | https://ps.ueb.cas.cz/pdfs/phs/2004/01/07.pdf |
| Alternate Webpage(s) | https://doi.org/10.1023/B%3APHOT.0000040567.42444.c2 |
| Journal | Photosynthetica |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
