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ATPase activity in cell wall and microsomal fractions from fresh and washed potato tuber discs was measured. The activity was markedly stimulated by Ca(2+) whereas K(+) and Na(+) had little effect. The Ca(2+)-ATPase increased with washing, particularly in the cell wall fractions and in the low
Actinomycin D prevents the full development in a 24-hour period of both wound respiration and cyanide resistance only when given in the first 10 to 12 hours following the cutting of potato tuber (Solanum tuberosum var. Russet) slices. The capacity for choline incorporation into phosphatidylcholine
Gossypol was examined in relation to its effect on certain enzymes and enzyme complexes associated with the tricarboxylic acid cycle and the electron transport system. Succinic dehydrogenase and cytochrome oxidase activity from sweet potato was completely inhibited by gossypol at 7.5 x 10(-3)m and