Abstract
The levels of invertase (E.C. 3.2.1.26) activity were measured throughout the development of the fourth leaf of Lolium temulentum. No neutral invertase activity was detected. Soluble acid invertase activity fell during leaf extension but rose again after ligule formation. This rise continued into senescence and was accompanied by the appearance of activity in the insoluble fraction. Evidence is presented that the insoluble activity was not an artefact of preparation, and that it represented an extracellular acid invertase. Fractionation of soluble invertase by gel filtration showed the appearance of a high molecular weight form at the time when insoluble activity was rising. The relationships between the different forms of the enzyme are discussed, together with their roles in leaf development.
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Pollock, C.J., Lloyd, E.J. The distribution of acid invertase in developing leaves of Lolium temulentum L.. Planta 133, 197–200 (1977). https://doi.org/10.1007/BF00391919
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DOI: https://doi.org/10.1007/BF00391919