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Root System Traits Contribute to Variability and Plasticity in Response to Phosphorus Fertilization in 2 Field-Grown Sorghum[Sorghum bicolor(L.)Moench]Cultivars

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Plant Phenomics 2023年第1期5卷 6-21页

作者： Michael O.Adu paul a.asare David O.Yawson Kwadwo K.Amoah Kofi Atiah Matthew K.Duah Alex Graham Department of Crop Science School of AgricultureCollege of Agriculture and Natural SciencesUniversity of Cape CoastCape CoastGhana Centre for Resource Management and Environmental Studies(CERMES) The University of the West IndiesCave Hill CampusP.O.Box 64Bridgetown BB11000Barbados Department of Soil Science School of AgricultureCollege of Agriculture and Natural SciencesUniversity of Cape CoastCape CoastGhana

Due to roots'physical and physiological roles in crop productivity,interest in root system architecture(RSA)and plasticity in responses to abiotic stresses is *** is significant for the food security of millions of *** deficiency is an important limitation of sorghum *** is little information on the RSA-based responses of sorghum to variations in external P supply([P]_(ext)).This study evaluated the phenotypic plasticity and RSA responses to a range of[P]_(ext) in 2 sorghum *** results showed that both genotypes responded to[P]_(ext) but with significant variations in about 80%of the RSA traits *** biomass and most RSA traits increased with increasing[P]_(ext).Plasticity was both genotype-and *** most RSA traits,the white sorghum genotype showed significantly higher plasticity than the red genotype,with the former having about 28.4%higher total plasticity than the *** traits,such as convex area,surface area,total root length,and length diameter ranges,showed sizeable genetic *** biomass had a high degree of plasticity,but root number and angle traits were the leading contributors to *** results suggested 2 root trait spectra:root exploration and developmental spectrum,and there was an indication of potential trade-offs among groups of root *** is concluded that RSA traits in sorghum contribute to variability and plasticity in response to[P]_(ext).Given that there might be trade-offs among sorghum root traits,it would be instructive to determine the fundamental constraints underlying these trade-offs.

关键词： Root instru constraints

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