Effects of experimental warming on peroxidase, nitrate reductase and glutamine synthetase activities in wheat
¹Instituto Tecnológico de Sonora, 5 de febrero, 818 Sur, Col. Centro, Cd. Obregón, Sonora, México, CP: 85000
²Instituto Tecnológico del Valle del Yaqui, Calle 600, Block 611, Bácum, San Ignacio Río Muerto, Sonora, México, CP: 85275
³Laboratorio Nacional de Geoquímica y Mineralogía, Sede Regional Sur de Sonora, 5 de febrero, 818 Sur, Col. Centro, Cd. Obregón, Sonora, México, CP: 85000
⁴Instituto Potosino de Investigación Científica y Tecnológica. Camino a la Presa San José 2055, Col. Lomas, Sección 4, San Luis Potosí, México, CP: 78216
*Corresponding author: firstname.lastname@example.org
Given the effects of climate change and its significant consequences on plant productivity, it is necessary to evaluate the enzymatic responses of the most important crops such as wheat (Triticum durum L.). We examined the response of foliar peroxidase activity, nitrate reductase, and glutamine synthetase to experimental increments of temperature (+2 °C) under field conditions following conventional agricultural practices. Foliar samples, in both control and warming treatments were taken during growth, tillering and flowering phenophases to test the peroxidase activity. Similarly, nitrate reductase, glutamine synthetase activities, and glutamine content were measured during the heading phenophase. Due to the effects of experimental warming, peroxidase activity significantly increased. The nitrate reductase activity was also higher in the warming treatment, suggesting a high nitrogen metabolism efficiency. Whereas, the increase observed in the glutamine synthetase activity, and consequently the glutamine content, evidenced a biochemical signal of an early senescence due to the effect of warming.