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Degradation Enhancement as the Mechanism of Resistance to Imazethapyr in Barnyardgrass Planta Daninha
DALAZEN,G.; PISONI,A.; RAFAELI,R.S.; MEROTTO JR.,A..
ABSTRACT: Non-target site (NTS) herbicide resistance by degradation enhancement is an increasing problem in several weeds around the world. In this study, the occurrence of degradation enhancement by cytochrome P450 monooxygenases (cytP450) was evaluated as the mechanism of resistance to imazethapyr in barnyardgrass. The cytP450 inhibitors malathion and piperonyl butoxide (PBO) and the inducer naphthalic anhydride (NA), applied in mixture or sequentially with imazethapyr, were evaluated on imidazolinone-susceptible and -resistant barnyardgrass byotipes. In addition, the degradation of imazethapyr was analyzed in plants treated with imazethapyr applied alone or two hours after malathion or NA. The spraying of malathion and PBO reduced the resistance factor...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Echinochloa crus-galli; Herbicide detoxification; Weed resistance; Imidazolinones; CytP450.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100317
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Physiological and Genetic Bases of the Circadian Clock in Plants and Their Relationship with Herbicides Efficacy Planta Daninha
DALAZEN,G.; MEROTTO JR.,A..
In order to adapt to daily environmental changes, especially in relation to light availability, many organisms, such as plants, developed a vital mechanism that controls time-dependent biological events: the circadian clock. The circadian clock is responsible for predicting the changes that occur in the period of approximately 24 hours, preparing the plants for the following phases of the cycle. Some of these adaptations can influence the response of weeds to the herbicide application. Thus, the objectives of this review are to describe the physiological and genetic mechanisms of the circadian clock in plants, as well as to demonstrate the relationship of this phenomenon with the effectiveness of herbicides for weed control. Relationships are described...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Time of herbicide application; Weeds; Photoreceptors; Phytochromes.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100191
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