
TY  - JOUR
A1  - Furbank, RT 
A1  - Badger, MR 
T1  - Photorespiratory Characteristics of Isolated Bundle Sheath Strands of C<sub>4</sub> Monocotyledons
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1983
VL  - 10
IS  - 5
SP  - 451
EP  - 458
KW  - 
UR  - https://doi.org/10.1071/PP9830451 
N2  - Bundle sheath strands (free of mesophyll tissue) were isolated from leaves of Zea mays L., Panicum miliaceum L. and Chloris gayana L. The response of oxygen exchange to CO2 and O2 concentration in these strands was examined using 18O2 and mass spectrometry. Bundle sheath strands from all these species showed considerable O2 uptake at low CO2, 40-80 µmol (mg Chl)-1 h-1. This O2 uptake was stimulated by O2 in the range 60-300 µM and was suppressed 60-70% by 5 mM NaHCO3. The remaining light-dependent O2 uptake was similarly sensitive to increasing O2 concentration. These results are interpreted in terns of the CO2 concentrating function of C4 photosynthesis and the low apparent rates of photorespiration observed in C4 plants in vivo. 
ER  -

