A comparison of nitrogen use efficiency definitions in Citrus rootstocks |
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Authors: | Agostino Sorgonà ,Maria Rosa AbenavoliPietro Giorgio Gringeri,Giovanni Cacco |
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Affiliation: | Dipartimento di Biotecnologie per il Monitoraggio Agro-Alimentare ed Ambientale (BIOMAA), Università Mediterranea di Reggio Calabria, Facoltà di Agraria Loc. Feo di Vito, I-89124 Reggio Calabria, RC, Italy |
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Abstract: | Nitrogen use efficiency (NUE) definitions, commonly used in literature, are evaluated in response to nitrate availability in four citrus rootstocks, Rough Lemon (Citrus jambhiri Lush) (RL), Sweet Orange (Citrus sinensis (L.) Osbeck) (SwO), Cleopatra Mandarin (Citrus reshni Hort ex Tan.) (CM) and Sour Orange (Citrus aurantium L.) (SO). The application of diverse definitions determine different characterizations in N-efficiency among rootstocks. Nitrogen utilization efficiency (NUtE) and nitrogen efficiency ratio (NER) determine equal level of nitrogen efficiency among all rootstocks. Total nitrogen accumulation (TNA), nitrogen uptake efficiency (NUpE), shoot dry weight (SDW) and total leaf area (TLA) response curves produce the same NUE characterization: SO and SwO were nitrate use efficient and inefficient rootstocks, respectively, while the RL and CM exhibit superior and inferior genetic potential, respectively. |
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Keywords: | Citrus rootstocks Nitrogen use efficiency Nitrate |
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