Root morphological traits related to phosphorus - uptake efficiency of soybean, sunflower, and maize
Many of the plant acquisition strategies for immobile nutrients, such as phosphorus [P], are related to the maximization of soil exploration at minimum metabolic cost. Previous studies have suggested that soybean [Glycine max L.], sunflower [Helianthus annuus L.], and maize [Zea mays L.] differ in t...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2015fernandez2.pdf LINK AL EDITOR |
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| 008 | 181208t2015 |||||o|||||00||||eng d | ||
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| 999 | |d 47297 | ||
| 022 | |a 1436-8730 | ||
| 024 | |a 10.1002/jpln.201500155 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 100 | 1 | |a Fernández, Mariana Cecilia |9 12268 | |
| 245 | 0 | 0 | |a Root morphological traits related to phosphorus - uptake efficiency of soybean, sunflower, and maize |
| 520 | |a Many of the plant acquisition strategies for immobile nutrients, such as phosphorus [P], are related to the maximization of soil exploration at minimum metabolic cost. Previous studies have suggested that soybean [Glycine max L.], sunflower [Helianthus annuus L.], and maize [Zea mays L.] differ in their P uptake efficiency. In this investigation we employed these three species to evaluate: [1] the effect of suboptimal P conditions on root morphological traits related to root porosity and fineness and [2] how these traits are related to P-uptake efficiency. Opaque 25-L plastic containers were used to grow plants hydroponically. The three species were compared under two P availability levels [low P and high P]. Most of the observed responses were in the direction to favor P uptake under low-P conditions. Compared to P-sufficient plants, P-stressed plants of the three species showed higher root-to-shoot ratio, specific root length, root porosity and root aerenchyma, and a lower root density. For example, P-stress increased root porosity by a factor of 2.0, 1.4, and 1.4 in soybean, sunflower, and maize, respectively. Soybean and sunflower were the species with the highest P-uptake efficiency, expressed as P uptake either per unit root biomass or length. The results demonstrate the central role of aerenchyma development in modifying root length per unit root biomass and, thus, reducing the root`s foraging costs. Consequently, aerenchyma is suggested to be a possible mechanism for better P-uptake efficiency. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | 0 | |a AERENCHYMA | |
| 653 | 0 | |a MINERAL NUTRITION | |
| 653 | 0 | |a PLANT STRESS | |
| 653 | 0 | |a ROOT MORPHOLOGY | |
| 700 | 1 | |9 6390 |a Rubio, Gerardo | |
| 773 | |t Journal of Plant Nutrition and Soil Science |g vol.178 (2015), p.807-815, grafs., tbls. | ||
| 856 | |u http://ri.agro.uba.ar/files/intranet/articulo/2015fernandez2.pdf |i En reservorio |q application/pdf |f 2015fernandez2 |x MIGRADOS2018 | ||
| 856 | |u https://www.wiley.com/ |x MIGRADOS2018 |z LINK AL EDITOR | ||
| 942 | 0 | 0 | |c ARTICULO |
| 942 | 0 | 0 | |c ENLINEA |
| 976 | |a AAG | ||