
%0 Journal Article
%A Johnston, M 
%A Grof, CPL 
%A Brownell, PF 
%T Chlorophyll <I>a/b</I> Ratios and Photosystem Activity of Mesophyll and Bundle Sheath Fractions From Sodium-Deficient C<sub>4</sub> Plants
%J Functional Plant Biology
%D 1989/12/01
%V 16
%N 6
%P 449-457
%K 
%R https://doi.org/10.1071/PP9890449
%U https://www.publish.csiro.au/paper/PP9890449 
%X 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. 
