| | 1 | Author
| P. Camilleri, J. R. Bowyer, P. H. Mcneil | Requires cookie* | | | Title
| The Effects of Photosystem I Electron Acceptors on Leaf Discs  | | | | Abstract
| A leaf-disc chamber has been used to measure changes in photosynthesis by soybean leaf discs which have been supplied with photosystem I (PS I) electron acceptors via the transpiration stream. The uncharged heteropentalenes induce an inhibitory effect on C O ; fixation which is d e pendent on the /7-octanol-water partition coefficient o f these molecules. Paraquat, which carries a di-positive charge, was ineffective under the same conditions and at a concentration o f 10-4 m. Cationic species such as K +, Ca2+ and Mg2+ greatly enhanced the effect of paraquat on C 0 2 fixation while the presence o f these ions did not affect inhibition by the heteropentalenes. Such differences betw een uncharged and charged PS I electron acceptors have been explained in terms of electrostatic interactions encountered by paraquat on its way to the site o f action within the chloroplast, via the transpiration stream. | | | |
Reference
| Z. Naturforsch. 42c, 829 (1987); received D ecem ber 1 1986 | | | |
Published
| 1987 | | | |
Keywords
| Photosynthesis, Photosystem I Electron A cceptors, H eteropentalenes, Paraquat, Leaf Discs | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_C/42/ZNC-1987-42c-0829.pdf | | | | Identifier
| ZNC-1987-42c-0829 | | | | Volume
| 42 | |
|
