/sup 14/CO/sub 2/ incorporation into C/sub 4/ acids by leaves of the C/sub 3/-C/sub 4/ intermediate species, Moricandia arvensis and Panicum milioides, at Gamma-levels of CO/sub 2/
Conference
·
· Plant Physiol., Suppl.; (United States)
OSTI ID:5021786
The crucifer M. arvensis is a species with photorespiratory characteristics intermediate between C/sub 3/ and C/sub 4/ plants. Although the precise mechanism promoting decreased photorespiration has yet to be elucidated, evidence to date disfavors participation of C/sub 4/ metabolism. In order to conclusively assess the possible contribution, if any, of limited C/sub 4/ metabolism to the reduction of photorespiration, detached leaves of M. arvensis and M. moricandioides (C/sub 3/) were labeled with /sup 14/CO/sub 2/. When M. arvensis was illuminated and pulsed for 10 s the amount of label in malate increased from 4.5% of total soluble dpm fixed at 21% O/sub 2/ and 340 ..mu..l/l CO/sub 2/ to 10.3% at 20 ..mu..l/l. A two-fold increase was also evident for aspartate (from 2.9% to 6.5%). The C/sub 3/ Moricandia species failed to show a similar response to decreased CO/sub 2/. The physiological significance of the increase in C/sub 4/ acid-labeling which occurred in the intermediate species will be investigated by pulse-chase analyses of C/sub 4/ acids and glycine. Similar data for Panicum milioides (C/sub 3/-C/sub 4/) will also be presented.
- Research Organization:
- Univ. of Nebraska, Lincoln
- OSTI ID:
- 5021786
- Conference Information:
- Journal Name: Plant Physiol., Suppl.; (United States) Journal Volume: 80:4
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reduced apparent photorespiration by the C/sub 3/-C/sub 4/ intermediate species, Moricandia arvensis and Panicum milioides
Biochemical and physiological characterization of higher plants with reduced photorespiration. Progress report, May 25, 1981-August 1, 1983
Photorespiratory properties of total leaf protoplasts isolated from C/sub 3/-C/sub 4/ intermediate species of MORICANDIA. [Moricandia arvensis; Moricandia foetida; Tritium Aestivum]
Journal Article
·
Thu Feb 28 23:00:00 EST 1985
· Plant Physiol.; (United States)
·
OSTI ID:5806470
Biochemical and physiological characterization of higher plants with reduced photorespiration. Progress report, May 25, 1981-August 1, 1983
Technical Report
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Fri Dec 31 23:00:00 EST 1982
·
OSTI ID:5701776
Photorespiratory properties of total leaf protoplasts isolated from C/sub 3/-C/sub 4/ intermediate species of MORICANDIA. [Moricandia arvensis; Moricandia foetida; Tritium Aestivum]
Conference
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Mon Mar 31 23:00:00 EST 1986
· Plant Physiol., Suppl.; (United States)
·
OSTI ID:5019470