00904naa a2200181 a 450000100080000000500110000800800410001910000160006024500850007626000090016152004150017065000120058565000120059765000160060965300260062570000180065177300530066912796602025-02-19       1986    bl uuuu     u00u1 u    #d1 aKEMP, M. S.  aPhyto-alexins and stress metabolites in sapwood of trees.h[electronic resource]  c1986  aA wide range of organic compounds, many of them fungitoxic or fungistatic, appear in the sapwood of trees after wounding, injury or fungal attack. There is evidence that most of these compounds are formed by dying parenchyma cells and they therefore can be considered to be phytoalexins. In many cases such compounds accumulate in narrow ‘reaction zones’ which serve to impede further progress of pathogens  aAlburno  aÁrvore  aFitoalexina  aEstresse metabólicoa1 aBURDEN, R. S.  tPhytochemistrygv. 25, n. 6, p. 1261-1269, 1986.