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In turn, detrimental HM effects on NM shoots could result from the diminution of most phenolics' accumulation, and only the content of coumarate (produced by bifunctional phenylalanine/tyrosine ammonia lyase) and rosmarinic acid increased. All these together with an enhanced concentration of abscisic acid might suggest that NM strategy to cope with HMs is based mostly on a restriction of metal movement with transpiration flow and their limited distribution in leaves. Summarizing, our findings for the first time point out the physiological

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BACKGROUND/AIM Temozolomide (TMZ) induces prolonged arrest of human glioma cells in the G2/M phase and inhibition of the G2 checkpoint intensifies the effect of TMZ. These findings suggest that the G2 checkpoint is linked to DNA repair mechanisms. MATERIALS AND METHODS To clarify the mechanism of TMZ resistance, we established TMZ-resistant (TR) clones by serial treatment of U87MG cells with TMZ. We evaluated TMZ-induced cell cycle arrest and the effect of various G2 checkpoint inhibitors. RESULTS We observed that longer exposure (over