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The Role Of Short-Term High Temperature Pretreatment On The Uv-B Tolerance Of Barley Cultivars, Nuran Çi̇çek, Ivanka Fedina, Hüsnü Çakirlar, Maya Velitchkova, Katya Georgieva
The Role Of Short-Term High Temperature Pretreatment On The Uv-B Tolerance Of Barley Cultivars, Nuran Çi̇çek, Ivanka Fedina, Hüsnü Çakirlar, Maya Velitchkova, Katya Georgieva
Turkish Journal of Agriculture and Forestry
The impact of pretreatment with high temperature (45 °C for 45 min) on the UV-B tolerance of 4 barley cultivars (Hordeum vulgare L. 'Bülbül-89', 'Kalaycı-97', 'Tarm-92', and 'Tokak-157/37') was examined. The response of the plants to treatment was evaluated by measuring the pigment content, chlorophyll a fluorescence, oxygen evolution, fraction of oxygen-evolving complex, proline content, UV-B-absorbing compounds (A_{535} and A_{300}), and stress markers (malondialdehyde, H_2O_2, and UV-B marker). Regardless of high temperature pretreatment, UV-B irradiation decreased the photosynthetic pigment content, photosystem II activity, oxygen evolution, and the fraction of oxygen-evolving complex in almost all of the barley cultivars. UV-B treatment …
Optimizing Water And Nitrogen Use For Maize Production Under Semiarid Conditions, Hafiz Mohkum Hammad, Ashfaq Ahmad, Farhat Abbas, Wajid Farhad
Optimizing Water And Nitrogen Use For Maize Production Under Semiarid Conditions, Hafiz Mohkum Hammad, Ashfaq Ahmad, Farhat Abbas, Wajid Farhad
Turkish Journal of Agriculture and Forestry
Water and nitrogen are among the most important crop inputs for optimum production of maize (Zea mays L.). A comprehensive experiment was conducted during 2009 and 2010 under the semiarid conditions of Pakistan to evaluate the effects of water and N applications on the growth and yield of irrigated maize. The objective was to formulate water and N best management practices (BMPs) for the above conditions. Three irrigation regimes (525, 450, and 375 mm ha^{-1}) with 5 N rates (0, 75, 150, 225, and 300 kg ha^{-1}) were tested using a split plot with a randomized complete block design. The …