Formation of cluster roots and citrate exudation by Lupinus albus in response to localized application of different phosphorus sources

Shu, Liangzuo; Shen, Jianbo; Rengel, Zed; Tang, Caixian; Zhang, Fusuo; Cawthray, Gregory R.

doi:10.1016/j.plantsci.2007.02.006

Cited by 39 publications

(22 citation statements)

References 54 publications

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“…It is well documented that white lupin is efficient in mobilization of sparingly soluble P pools through root exudation and cluster root formation (Braum and Helmke 1995;Egle et al, 2003;Watt and Evans, 2003;Shen et al, 2003;Lambers et al, 2006;Shu et al, 2007;Wang et al, 2008). In the present study, we detected large citrate exudation by lupin (15.7 ± 2.3 µmol h −1 per plant), but the pH of white lupin exudates was higher than in wheat cultivars.…”

Section: Figuresupporting

confidence: 44%

Differential Capacity of Wheat Cultivars and White Lupin to Acquire Phosphorus From Rock Phosphate, Phytate and Soluble Phosphorus Sources

Sepehr

Rengel

Fateh

et al. 2012

Journal of Plant Nutrition

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2 We characterized varying capacity of two wheat cultivars ('Brookton' and 'Krichauff') and white lupin to acquire and utilize phosphorus (P) from different P resources [P 0 , rock phosphate, composted rock phosphate, phytate and soluble P) at 200 mg P kg −1 soil]. In all three genotypes, shoot P concentration and content were highest in the phytate treatment and lowest in P 0 . Roots of wheat cultivars exuded only traces of organic acid anions, whereas lupin root exudates contained high concentration of citrate. Phosphorus utilization efficiency (PUTE) was highest in P 0 and lowest in the phytate treatment for all three genotypes. Phosphorus acquisition efficiency (PACE) ranged from 1 ('Brookton' in P 0 ) to 355% ('Brookton' supplied with phytate). In conclusion, the availability of P in rock phosphate was not influenced by microbe and organics supplementation in the composting process and wheat cultivars were not as efficient as lupin in using P from sparingly soluble P sources.

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Section: Figuresupporting

confidence: 44%

Differential Capacity of Wheat Cultivars and White Lupin to Acquire Phosphorus From Rock Phosphate, Phytate and Soluble Phosphorus Sources

Sepehr

Rengel

Fateh

et al. 2012

Journal of Plant Nutrition

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“…In the present study, [citrate] was significantly greater in soils associated with cluster roots at pH 5.5 compared with that at pH 7.5 (Fig. 3), although that was only significant for plants grown on Al-P. Split-root studies have shown that the amount of citrate released from cluster roots can be increased locally by reducing [P] in the root environment (e.g., L. albus, Shu et al 2007 andH. prostrata, Shane et al 2003a, b).…”

Section: Influence Of Phcontrasting

confidence: 43%

“…On the other hand, the amount of P supplied to roots can locally influence cluster-root growth. Shu et al 2007, using split-root studies with L. albus, showed that cluster-roots were significantly suppressed by 6-10% on root halves that had greater P supply. In the present study, given the significantly greater solubility of both P sources at pH 5.5, equal cluster-root proportions on root halves would mean that any local influence of pH on clusterroot growth was indirect, perhaps on shoot P though greater P availability in the root environment.…”

Section: Influence Of Phmentioning

confidence: 99%

Impact of phosphorus mineral source (Al–P or Fe–P) and pH on cluster-root formation and carboxylate exudation in Lupinus albus L.

et al. 2008

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Lupinus albus L. were grown in rhizoboxes containing a soil amended with sparingly available Fe-P or Al-P (100 μg P g −1 soil/resin mixture). Root halves of individual plants were supplied with nutrient solution (minus P) buffered at either pH 5.5 or 7.5, to assess whether the source of mineral-bound P and/or pH influence cluster-root growth and carboxylate exudation. The P-amended soil was mixed 3:1 (w/w) with anion-exchange resins to allow rapid fixation of carboxylates. Treatments lasted 10 weeks. Forty percent and 30% of the root mass developed as cluster roots in plants grown on Fe-P and Al-P respectively, but cluster-root growth was the same on root-halves grown at pH 5.5 or 7.5. Mineralbound P source (Al-or Fe-P) had no influence on the types of carboxylates measured in soil associated with cluster roots-citrate (and trace amounts of malate and fumarate) was the only major carboxylate detected. The [citrate] in the rhizosphere of cluster roots decreased with increased shoot P status (suggesting a systemic effect) and also, only for plants grown on Al-P, with decreased pH in the root environment (suggesting a local effect). In a separate experiment using anion exchange resins pre-loaded with malate or citrate, we measured malate (50%) and citrate (79%) recovery after 30 days in soil. We therefore, also conclude that measurements of [citrate] and [malate] at the root surface may be underestimated and would be greater than the 40-and 1.6-μmol g −1 root DM, respectively estimated by us and others because of decomposition of carboxylates around roots prior to sampling.

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“…Un ejemplo es Gevuina avellana Molina, la cual crece en suelos volcánicos de Chile y desarrolla raíces en conglomerado para movilizar P mediante la exudación de ácidos orgánicos (Ramírez et al, 2004). Sin embargo, otras plantas pertenecientes a otras familias también pueden producir raíces en conglomerado, como por ejemplo el caso de la leguminosa lupino blanco (Lupinus albus L.) (Shu et al, 2007). Una de las características de las raíces en conglomerado es la producción concentrada de ácidos orgánicos, como el ácido málico y cítrico, en lugares con mayor concentración de P, incrementando así, su solubilidad en el suelo (Shane y Lambers, 2005;Shu et al, 2007;Lambers et al, 2012).…”

Section: Raíces En Conglomeradosunclassified

“…Sin embargo, otras plantas pertenecientes a otras familias también pueden producir raíces en conglomerado, como por ejemplo el caso de la leguminosa lupino blanco (Lupinus albus L.) (Shu et al, 2007). Una de las características de las raíces en conglomerado es la producción concentrada de ácidos orgánicos, como el ácido málico y cítrico, en lugares con mayor concentración de P, incrementando así, su solubilidad en el suelo (Shane y Lambers, 2005;Shu et al, 2007;Lambers et al, 2012). El uso de lupino blanco en cultivos mixtos permite aumentar al doble la absorción de P en trigo, comparado a trigo en monocultivo (Horst y Waschkies, 1987).…”

Section: Raíces En Conglomeradosunclassified

Sistemas radicales de cultivos: extensión, distribución y crecimiento

Cabeza

Claassen

2017

agrosur

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The roots are the plant organs responsible for water and nutrient absorption which are needed for adequate plant growth. Therefore, it is important to know both the extent and distribution of the root system into the soil since it determines the ability of the plant for mining soil resources, especially in poor soils or soils with low nutrient or water availability. The present work describes the root system of different crops and their relationships with the shoot, and how it determines the efficiency for nutrient uptake. On the other side, we review some morphological adaptations of the root system that improve the absorption of nutrients. This work also describes how the renewal of the root system occurs in a growing season and how it changes or adapts depending on environmental stress factors affecting the plants.

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Formation of cluster roots and citrate exudation by Lupinus albus in response to localized application of different phosphorus sources

Cited by 39 publications

References 54 publications

Differential Capacity of Wheat Cultivars and White Lupin to Acquire Phosphorus From Rock Phosphate, Phytate and Soluble Phosphorus Sources

Differential Capacity of Wheat Cultivars and White Lupin to Acquire Phosphorus From Rock Phosphate, Phytate and Soluble Phosphorus Sources

Impact of phosphorus mineral source (Al–P or Fe–P) and pH on cluster-root formation and carboxylate exudation in Lupinus albus L.

Sistemas radicales de cultivos: extensión, distribución y crecimiento

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