01720naa a2200217 a 450000100080000000500110000800800410001910000220006024501270008226000090020952009700021865300100118865300260119865300110122465300200123565300230125570000180127870000180129670000170131477301710133111219402014-10-10       2014    bl uuuu     u00u1 u    #d1 aMARTINI, L. F. D.  aAbsorption, translocation and metabolism of  BISPYRIBAC-SODIUM on rice seedlings under cold stress.h[electronic resource]  c2014  aRice production is highly affected by weed competition. The efficacy of chemical weed control and crop safety, as well its crop selectivity, is a function of absorption, translocation and metabolism of herbicides. This study investigates the effect of cold stress 22/16C (day/night) on absorption, translocation and metabolism of 14C-bispyribac-sodium on rice seedlings. Maximum 14C-bispyribac-sodium absorption occurred at 24 HAT and was stimulated by the warm 30/22C (day/night) temperature. A large amount of total absorbed herbicide was retained on the treated leaf, indicating that bispyribac-sodium had lower translocation to other plant parts. Injury on rice plants was enhanced by exposure to cold, emphasizing the negative effect on herbicide metabolism. Cold-grown plants had higher recovery of the parent herbicide than plants grown at a warm temperature. Moreover, warm grown plants showed a greater amount of metabolite B compared to cold grown plants.  aArroz  aherbicide selectivity  ainjury  alow temperature  aP450-monooxygenase1 aBURGOS, N. R.1 aNOLDIN, J. A.1 aAVILA, L. A.  tIn: CONGRESSO BRASILEIRO DA CI??NCIA DAS PLANTAS DANINHAS, 29., 2014, Gramado, RS. Anais... Londrina, PR: Sociedade Brasileira da Ci??ncia das Plantas Daninhas, 2014.