Journal Article

Root Proliferation, Proton Efflux, and Acid Phosphatase Activity in Common Bean (Phaseolus vulgaris) Under Phosphorus Shortage

Drevon, Jean Jacques, Institut National de la Recherche Agronomique (UMR 1220), Montpellier, France, Slatni, Tarek, Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie, Tunisia, Labidi, Nahla, Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie, Tunisia, Abdelly, Chedly, Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie, Tunisia, Kouas, Saber, Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie, Tunisia, Debez, Ahmed, Laboratoire d'Adaptation des Plantes aux Stress Abiotiques, Centre de Biotechnologie, Tunisia

2009

Overview

The impact of phosphorus (P) availability on root proliferation, proton efflux, and acid phosphatase activities in roots and leaves was investigated in two lines of common bean (Phaseolus vulgaris): BAT 477 and CocoT. Phosphorus was supplied as KH₂PO₄ at 0 and 60 μmol per plant (0P and 60P, respectively). Under P shortage, the plant growth was more restricted in CocoT than in BAT 477, shoots being more affected than roots. The root area increased significantly at 0P in both lines. Up to 1 week following P shortage, the proton efflux increased in both lines despite a higher extent in BAT 477 as compared to CocoT. Root acid phosphatase activity was significantly higher under P limitation in the both lines, this trend being more pronounced in BAT 477 than in CocoT. This was also true for the leaf acid phosphatase. Regardless of the bean line, higher values were recorded for the old leaves as compared to the young ones for this parameter. Interestingly, a significant correlation between Pi content in old leaves and their acid phosphatase activity was found in P-lacking (0P) plants of the both bean lines, suggesting that acid phosphatase may contribute to increase the phosphorus use efficiency in bean through the P remobilization from the old leaves. As a whole, our results highlight the significance of the root H+ extrusion and the acid phosphatase activity rather than the root proliferation in the relative tolerance of BAT 477 to severe P deficiency.

• Publisher: Springer-Verlag,Springer Nature B.V,한국식물학회
• Subject: ACID PHOSPHATASE / Acidification / Beans / Biomedical and Life Sciences / Efflux / FOSFATASA ACIDA / French beans / Leaves / Legumes / Life Sciences / LSD / Lysergic acid diethylamide / Morphology / Original Research / PHASEOLUS VULGARIS / Phosphatase / PHOSPHATASE ACIDE / Phosphorus / Phosphorus availability / Phosphorus use efficiency / Plant Breeding/Biotechnology / Plant Ecology / Plant Genetics and Genomics / Plant growth / Plant Sciences / Plant Systematics/Taxonomy/Biogeography / Potassium phosphate / Potassium phosphates / Proton efflux / Protons / Root proliferation / Roots / Seeds / Shortages / 생물학