02538naa a2200289 a 450000100080000000500110000800800410001910000250006024501270008526000090021252016810022165300220190265300190192465300230194365300190196665300280198570000190201370000190203270000200205170000250207170000180209670000180211470000190213270000190215170000220217077300560219211304692020-12-15       2020    bl uuuu     u00u1 u    #d1 aAUCIQUE-PEREZ, C. E.  aHow do wheat plants cope with Pyricularia oryzae infection? A physiological and metabolic approach.h[electronic resource]  c2020  aWheat blast, caused by Pyricularia oryzae, has become one of the major threats for food security worldwide. Here, we investigated the behavior of three wheat cultivars (BR-18, Embrapa-16, and BRS-Guamirim), difering in their level of resistance to blast, by analyzing changes in cellular damage, antioxidative metabolism, and defense compounds as well as their photosynthetic performance and metabolite profle. Blast severity was lower by 45 and 33% in Embrapa-16 and BR-18 cultivars (moderately resistant), respectively, at 120 h after inoculation in comparison to BRS-Guamirim cultivar (susceptible). Cellular damage caused by P. oryzae infection was great in BRS-Guamirim compared to BR-18. The photosynthetic performance of infected plants was altered due to difusional and biochemical limitations for CO2 fxation. At the beginning of the infection process, dramatic changes in both carbohydrate metabolism and on the levels of amino acids, intermediate compounds of the tricarboxylic acid cycle, and polyamines were noticed regardless of cultivar suggesting an extensive metabolic reprogramming of the plants following fungal infection. Nevertheless, Embrapa-16 plants displayed a more robust and efcient antioxidant metabolism, higher phenylalanine ammonia-lyase and polyphenoloxidase activities and higher concentrations of phenolics and lignin, which, altogether, helped them to counteract more efciently the infection by P. oryzae. Our results demonstrated that P. oryzae infection signifcantly modifed the metabolism of wheat plants and different types of metabolic defence may act both additively and synergistically to provide additional plant protection to blast.  aCarbon metabolism  aFungal disease  aMetabolic profling  aPhotosynthesis  aReactive oxygen species1 aRESENDE, R. S.1 aMARTINS, A. O.1 aSILVEIRA, P. R.1 aCAVALCANTI, J. H. F.1 aVIEIRA, N. M.1 aFERNIE, A. R.1 aARAÚJO, W. L.1 aDAMATTA, F. M.1 aRODRIGUES, F. Á.  tPlanta, HEIDELBERG, Germanygv. 252, p. 1-17, 2020.