Differential Effect of Ribosome-Inactivating Proteins on Plant Ribosome Activity and Plant Cells Growth

Abstract
The effect of ribosome-inactivating proteins (RIPs), either single-chain or toxins, was studied on plant ribosomes. RIPs did not affect ribosomes from their own plants, while inhibiting to a variable extent protein synthesis by heterologous plant ribosomes. Ricin stimulated and PAP—S inhibited the growth of carrot cells in culture.