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What happens with tobacco metabolism if protein casein is the only source of nitrogen?

Publication

Abstract

The well-known paradigm that plants must rely on soil fauna for the breakdown of organic matter has been challenged by many scientists now. We took a closer look on what happened with tobacco metabolism if grown in vitro in sterile conditions with casein as a sole nitrogen (N) source.

Taken together, our findings suggest that tobacco plants accumulate mainly branched-chain and basic amino acids from casein, secrete proteases into the medium and break the peptides in the apoplast.