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Foliar phosphorus supply and CO2 assimilation in common bean (Phaseolus vulgaris L.) under water deficit

2006; SciELO; Volume: 18; Issue: 3 Linguagem: Inglês

10.1590/s1677-04202006000300007

1677-9452

Mauro G. Santos, Rafael Vasconcelos Ribeiro, M. G. Teixeira, Ricardo Ferraz de Oliveira, Carlos Pimentel,

Soybean genetics and cultivation

Two common bean cultivars were grown in pots under greenhouse conditions. Plants were submitted to a foliar Pi spray two days before suspending irrigation, what enhanced net CO2 assimilation rate of Ouro Negro cultivar but did not change significantly the photosynthesis of Carioca cultivar under both water deficit and rehydration periods. The results revealed that a foliar Pi spray induced an up-regulation of photosynthesis in common bean under mild water deficit, with this effect being genotype-dependent.