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

作     者：Michael O.Adu Paul A.Asare David O.Yawson Kwadwo K.Amoah Kofi Atiah Matthew K.Duah Alex Graham Michael O.Adu;Paul A.Asare;David O.Yawson;Kwadwo K.Amoah;Kofi Atiah;Matthew K.Duah;Alex Graham

作者机构：Department of Crop ScienceSchool 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 ScienceSchool of AgricultureCollege of Agriculture and Natural SciencesUniversity of Cape CoastCape CoastGhana 

出 版 物：《Plant Phenomics》 (植物表型组学（英文）)

年 卷 期：2023年第5卷第1期

页      面：6-21页

核心收录：

学科分类：0402[教育学-心理学(可授教育学、理学学位）] 0303[法学-社会学] 0832[工学-食品科学与工程（可授工学、农学学位）] 09[农学] 0901[农学-作物学] 

主　　题：Root instru constraints 

摘      要：Due to roots physical and physiological roles in crop productivity,interest in root system architecture(RSA)and plasticity in responses to abiotic stresses is growing.Sorghum is significant for the food security of millions of people.Phosphorus deficiency is an important limitation of sorghum productivity.There 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 genotypes.The results showed that both genotypes responded to[P]_(ext) but with significant variations in about 80%of the RSA traits analyzed.Aboveground biomass and most RSA traits increased with increasing[P]_(ext).Plasticity was both genotype-and trait-dependent.For 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 former.RSA traits,such as convex area,surface area,total root length,and length diameter ranges,showed sizeable genetic variability.Root biomass had a high degree of plasticity,but root number and angle traits were the leading contributors to variation.The results suggested 2 root trait spectra:root exploration and developmental spectrum,and there was an indication of potential trade-offs among groups of root traits.It 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.