01807naa a2200301 a 450000100080000000500110000800800410001902200140006010000180007424501170009226000090020952009550021865000180117365000230119165000230121465000090123765000200124665000120126665000100127865000120128865000170130065000270131770000230134470000180136770000250138570000260141077300690143620764212017-12-27       2017    bl uuuu     u00u1 u    #d  a2320-38621 aGARCIA, M. L.  aStandardized rosemary extract induces host plant defenses and suppresses rice leaf blast.h[electronic resource]  c2017  aThe efficiency of rosemary (Rosmarinus officinalis L.) liquid extract (RLE), standardized as rosmarinic acid (RA) on the suppression of rice (Oryza sativa) leaf blast (Magnaporthe oryzae) (LB) were determinate. RLE (3.3, 6.6, and 10 mg·mL-1), SRA (3.1, 4.2, and 6.3 mg·mL-), and water (control) were sprayed on leaves of Primavera rice cultivar, at 48 hours before inoculation with M. oryzae (MO). The activities of chitinase, B-1, 3-glucanase, peroxidase, lipoxygenase, phenylalanine ammonia-lyase, and phenolic compounds and of salicylic acid levels were determined in samples collected before and after inoculation with MO. The highest concentrations of RLE and RA reduced the LB severity by more than 92%. Except for Peroxidase, all enzymes increased their activity after spraying RLE and RA, prior and after the challenge inoculation. Our results suggest that RLE standardized as RA can induce the activity of enzymes related to plant defense.  aBlast disease  aInduced resistance  aMagnaporthe oryzae  aRice  aRosmarinic acid  aAlecrim  aArroz  aBrusone  aOryza sativa  aRosmarinus officinalis1 aFERREIRA, N. L. O.1 aARRUDA, R. L.1 aFILIPPI, M. C. C. de1 aCONCEIÇÃO, E. C. da  tJournal of Medicinal Plants Studiesgv. 5, n. 5, p. 39-45, 2017.