The effect of sulphite on chlorophyll fluorescence and sucrose metabolism in poplar leaves
2002
Lorenc-Pluciäska, G. | Szadel, A. | Pluciäski, A. | Matysiak, R. (Polish Academy of Sciences, K¢rnik (Poland). Inst. of Dendrology)
On the basis of the results obtained in the present study, we postulate that sulphite at concentrations = 1.0 mM inhibits primarily sucrose synthesis, favours starch accumulation and has an indirect effect on sucrose degradation. Furthermore, if sucrose formation and availability for leaves to function effectively are limited under high stress conditions (i.e. 5.0 mM of sulphite), then the sucrose synthase pathway, as energetically les expensice than invertase, is induced, enabling Pi recycling and yielding products for biosynthesis and respiration
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