
TY  - JOUR
A1  - Johnston, M 
A1  - Grof, CPL 
A1  - Brownell, PF 
T1  - Chlorophyll <I>a/b</I> Ratios and Photosystem Activity of Mesophyll and Bundle Sheath Fractions From Sodium-Deficient C<sub>4</sub> Plants
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1989
VL  - 16
IS  - 6
SP  - 449
EP  - 457
KW  - 
UR  - https://doi.org/10.1071/PP9890449 
N2  - Significantly lower chlorophyll a/b ratios were observed in mesophyll thylakoids extracted from sodium-deficient than normal C4 plants of Amaranthus tricolor, Chloris gayana and Kochia childsii. The chlorophyll a/b ratio of bundle sheath thylakoids was not generally as significantly affected by sodium nutrition as the mesophyll thylakoids.    The lower chlorophyll a/b ratio in mesophyll thylakoids of sodium-deficient plants was associated with a lower photosystem II activity. The effect of sodium nutrition on photosystem I activity in the mesophyll thylakoids was dependent upon the species. Although no effect of sodium nutrition on photosystem I was observed in mesophyll thylakoids of K. childsii, photosystem I activity was greater in sodium-deficient than normal plants in A. tricolor.   The photosystem II and I activities of the bundle sheath thylakoids were not affected by sodium nutrition in either K. childsii or A. tricolor. 
ER  -

