Root system architecture variation in response to different NH4plus concentrations and its association with nitrogen-deficient tolerance traits in rice

• Autorzy: Ogawa S. , Valencia M.O. , Ishitani M. , Selvaraj M.G.
• Języki publikacji: EN

Abstrakty

EN

Root plasticity, a trait that can respond to different soil environments, may assist plants to scavenge the nutrients in heterogeneous soils. The objective of this paper is to understand the NH₄⁺-responsive root architectural changes in rice for better acquisition of Nitrogen (N). Using a root basket method, we examined the variation in root plasticity among diverse rice genotypes grown under hydroponics with different NH₄⁺ concentrations. Significant variation in NH₄⁺-responsive root architectural changes was observed among rice genotypes studied. From the hydroponic study, five contrasting genotypes with distinct rooting patterns (mono and dimorphic) were selected based on the ratio of deeper roots and rooting pattern value. These distinct genotypes were evaluated in the field to identify the role of root architecture on plant performance under different N applications. Our field results revealed that the dimorphic rooting genotypes enhance the grain yield and shoot biomass under N-deficit conditions than monomorphic root genotypes. We conclude that root architectural plasticity and dimorphic rooting pattern would be helpful to enhance the nitrogen-acquisition efficiency under N-deficit conditions in rice.

Słowa kluczowe

EN

root system; variation; plant response; ammonium cation; concentration; nitrogen-deficient tolerance; rice; root plasticity

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2014
• Tom: 36
• Numer: 09
• Opis fizyczny: p.2361-2372,fig.,ref.

Twórcy

autor

Ogawa S.

• International Center for Tropical Agriculture (CIAT), A.A. 6713 Cali, Colombia
• Department of Global Agriculture Science, Graduate School of Agricultural and Life Science, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, 113-8657 Tokyo, Japan

autor

Valencia M.O.

• International Center for Tropical Agriculture (CIAT), A.A. 6713 Cali, Colombia
• Faculty of Agricultural Sciences, National University of Colombia, Carrera 32 No 12-00 Chapinero, via Candelaria, Palmira, Colombia

autor

Ishitani M.

• International Center for Tropical Agriculture (CIAT), A.A. 6713 Cali, Colombia

autor

Selvaraj M.G.

• International Center for Tropical Agriculture (CIAT), A.A. 6713 Cali, Colombia

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Identyfikatory

DOI

10.1007/s11738-014-1609-6