The effects of phosphate and soil moisture on the nodulation and growth of Phaseolus vulgaris

Abstract

An examination of the effects of adding phosphorus to the soil on nodulation and P utilization in Phaseolus vulgaris L. showed a positive response in plant weight to increasing rates of phosphorus ( 32 P) when water tension was low in the pots.The efficiency of the utilization of fertilizer-P was directly influenced by the water content of the soil, showing increasing P accumulation after flowering.A highly positive interaction between P addition, water content and nodulation was observed. Nodules were shown to have a high P requirement, with phosphorus ( 32 P) contributing to an increase in the number and size of nodules.

Effect of phosphorus on drought tolerance inChloris gayanaKunth andCoix lacryma-jobiL

“…Increase in plant growth and yields by the increase in the content of available P in plants through mycorrhizal addition or foliar application under water stress conditions was reported in Phaseolus wdgaris (Bonetti et al 1984), Sorghum bicolor (Lahiri 1980), and Allium cepa (Nelsen and Safir 1982). The increase in the plant growth at the higher P level under stress conditions could be attributed to the improvement of the P nutrition status of plants, which resulted from increased P uptake.…”

The Response of the Phosphate Uptake System and the Organic Acid Exudation System to Phosphate Starvation in Sesbania rostrata

“…The deficiency of P i is thought to be one of the limiting factors of nitrogen fixation, and that leguminous plants require a relatively large amount of P i . There has been reported an apparent interaction between the fertilization of P i and nodulation (Bonetti et al 1984). In soybeans, the supply of P i contributes to the higher nitrogen fixating ability and nodule mass rather than to plant growth (Israel 1987).…”

Cell membrane stability and leaf water relations as affected by phosphorus nutrition under water stress in maize

“…It has been shown in a number of instances that the supply of extra P to plants can be of considerable benefit during water stress by increasing both the growth rate and yield (Nelson and Safir 1982;Bonetti et al 1984).…”