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Title:: Effects of Nodulation on Soybean Growth, Malate Synthesis and Exudation in Different Phosphorus Concentrations

Author(s):: LI Jiao-jiao; XU Zhou; LIANG Cui-yue; LIAO Hong; College of Agriculture, South China Agricultural University/State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources / Root Biology Center, Guangzhou 510642, China

Keywords:: Phosphorus availability; Rhizobium; Soybean; Malate

PACS:: -

DOI:: 10.11861/j.issn.1000-9841.2015.04.0643

Abstract:: The objective of study was to evaluate the effects of nodulation on the response of malate synthesis and exudation from soybean roots to phosphorus(P) availability. One soybean genotype YC03-3 was used, and inoculated with or without rhizobia under both high and low P conditions. At both flowering and maturing stages, plant dry weight, nitrogen(N) and P concentration, malate concentration and exudation were measured. The results showed that nodulated plants had higher biomass and N/P concentration than those in non-nodualted plants under high P conditions.However, no significant difference was observed under low P conditions.Malate concentration in non-nodulated roots was not influenced by P availability.However, malate concentration in nodulated roots was significantly higher at low P level than that at high P level at maturing stage. Moreover, malate exudation was significantly higher in the nodulated plants than that in non-nodulated plants under high P conditions. The results indicated that nodulation was involved in regulation of phosphate starvation responsive soybean growth, malate concentration and exudation.

References:

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Effects of Nodulation on Soybean Growth, Malate Synthesis and Exudation in Different Phosphorus Concentrations(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

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