Effects of Root Whorl Number on Performance of Common Bean (Phaseolus Vulgaris L.) Plants Grown under Low P Availability
Plant root characteristics are of primary importance in determining the ability of a plant to acquire nutrients and water. Several root characteristics are known to be responsible for nutrient acquisition efficiency in common bean. These traits include root depth, adventitious rooting, root hairs and number of root whorls. Whorls are defined as distinct tiers of basal roots that emerge in a tetrarch fashion along the base of hypocotyls. In this study, a set of six contrasting genotypes in basal root whorls were evaluated for performance in soil with low phosphorus availability. Plants were grown in mixed sand-soil media in the greenhouse, under low and high phosphorus availability. Data were collected at 14, 21 and 28 days after planting. Collected data included number of root whorls, number of basal roots, shoot and root dry weights, total leaf area and shoot P content and concentration. We concluded that number of root whorls is associated with P acquisition efficiency and that this trait can be used for selection of genotypes with better performance under low P availability.
Magalhaes Amade Miguel Rogerio Vieira Kathleen Brown Jonathan Lynch
Agricultural Research Institute of Mozambique, HAM, Central Zone Research Center, Sussundenga Resear Penn State University, 102 Tyson Building, University Park, PA 16802, USA
国际会议
The 7th International Symposium on Plant-Soil Interactions at Low pH(第七届低pH条件下植物-土壤交互作用国际研讨会)
广州
英文
180-181
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）