Role of phosphorus nutrition in development of cluster roots and release of carboxylates in soil-grown Lupinus albus

Shen, Jianbo; Rengel, Zed; Tang, Caixian; Zhang, F.

doi:10.1023/a:1022375229625

Cited by 104 publications

(76 citation statements)

References 25 publications

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“…Despite the supply of iron and zinc through the nutrient solution and despite the relatively high amounts of bicarbonate extractable P in the original soil, white lupins produced a significant quantity of cluster roots, especially at the end of the one-year experiment. Our results show that P-adequate plants also form cluster roots as previously demonstrated by Shen et al (2003) who supported the hypothesis that a partial depletion of available P over time could have induced P deficiency and enhanced formation of cluster roots. In our study, the low amounts of organic P and bicarbonate extractable P, and conversely the high phosphatase activities and the significant release of organic acids near the roots after a year confirmed this hypothesis.…”

Section: Discussionsupporting

confidence: 91%

Soil Phosphorus Uptake by Continuously Cropped Lupinus albus: A New Microcosm Design

et al. 2006

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When grown in soils with sparingly available phosphorus (P), white lupin (Lupinus albus L.) forms special root structures, called cluster roots, which secrete large amounts of organic acids and concomitantly acidify the rhizosphere. Many studies dealing with the understanding of this P acquisition strategy have been performed in short time experiments either in hydroponic cultures or in small microcosm designs with sand or sand:soil mixtures. In the present study, we applied an experimental design which came nearer to the natural field conditions: we performed a one-year experiment on large microcosms containing 7 kg of soil and allowing separation of rhizosphere soil and bulk soil. We planted six successive generations of lupins and analysed P uptake, organic P desorption, phosphatase activities and organic acid concentrations in different soil samples along a spatio-temporal gradient. We compared the rhizosphere soil samples of cluster (RSC) and non-cluster roots (RSNC) as well as the bulk soil (BS) samples. A total shoot biomass of 55.69 ± 1.51 g (d.w.) y )1 was produced and P uptake reached 220.59 ± 5.99 mg y )1 . More P was desorbed from RSC than from RSNC or BS (P < 0.05). RSC and RSNC showed a higher activity of acid and alkaline phosphatases than BS samples and a higher acid phosphatase activity was observed in RSC than in RSNC throughout the one-year experiment. Fumarate was the most abundant organic acid in all rhizosphere soil samples. Citrate was only present in detectable amounts in RSC while malate and fumarate were recovered from both RSC and RSNC. Almost no organic acids could be detected in the BS samples. Our results demonstrated that over a one-year cultivation period in the absence of an external P supply, white lupin was able to acquire phosphate from the soil and that the processes leading to this P uptake took place preferentially in the rhizosphere of cluster roots.

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Section: Discussionsupporting

confidence: 91%

Soil Phosphorus Uptake by Continuously Cropped Lupinus albus: A New Microcosm Design

et al. 2006

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“…These results showed that low P condition increased the CRN of E. coccineum as it has been reported previously in other species (Shane et al, 2003;Shen et al, 2003;Shane and Lambers, 2006). In absence of P, hormonal treatment of plants with NAA caused an increase of 61% in CRN and NPA application caused a decrease in 70% in CRN.…”

Section: Resultssupporting

confidence: 89%

“…Some reports in Lupinus albus L. (Fabaceae) have shown that CR induction is dependent on P, N, Fe, Mg or Zn deficiency (Shane et al, 2003;Shen et al, 2003). In this species, the mass of CR is more than 50% of the total root mass obtained in plants under low P conditions.…”

Section: Introductionmentioning

confidence: 87%

Effect of auxin on cluster roots induction in Embothrium coccineum J.R. Forst. & G. Forst. in phosphorus deficiency condition

Donoso-Ñanculao

Castro²,

Navarrete³

et al. 2013

Chilean J. Agric. Res.

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Auxins play an important role in cluster root (CR) development in some species under low P conditions. However, the mechanism for CR induction in Embothrium coccineum J.R. Forst. & G. Forst remains unknown. Therefore, the aim of this work was to determine the effect of auxin on CR induction in E. coccineum, under low P conditions. For this, plants of E. coccineum were grown under P sufficiency and deficiency, and were treated with exogenous auxin and an auxin transport inhibitor. Phosphorous concentration in leaves, proportion of the total root allocated to CR mass (CRA), CR number (CRN), CR mass (CRm), and individual CR mass (ICRm), were measured. The number of CR showed a negative correlation with P concentrations in leaves. Furthermore, application of auxin in plants grown under P deficiency increased the CRA in a 50% and CRN in a 60%. The values of all parameters measured in plants grown under P deficiency conditions were reduced to less than half that observed in control plants, after foliar application of auxin transport inhibitor. However, no difference was observed when auxin was applied in plants grown with P supply. These results suggest that P and auxin are important factors for CR induction in E. coccineum.

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“…This can be partly explained by the CON control, SA straw ash, RMA rape meal ash, CA cereal ash, Pw water-soluble P, Pdl doublelactate-soluble P, NS not significant at p 0.05 Different characters indicate significant different means at p 0.05 within a column *p 0.05 CON control, SA straw ash, RMA rape meal ash, CA cereal ash, Pw water-soluble P, Pdl doublelactate-soluble P, NS not significant low P uptake of this species (Table 2.8). Furthermore, in many studies P mobilization effects were found for lupin, albeit mainly for white lupin (Shen et al 2003;Kania 2005) owing to special root morphology (cluster roots) and root-induced chemical changes in the rhizosphere. According to results of Egle et al (2003) and Pearse et al (2007), blue lupin, which was used in the pot experiments, does not generate such "cluster roots", but can enhance nutrient availability by means of carboxylate excretion into the soil and uptake of cations.…”

Section: Effect Of Biomass Ashes and Cultivated Crops On Soil Charactmentioning

confidence: 99%

Phosphorus Fertilizing Effects of Biomass Ashes

Schiemenz

Kern

Paulsen³

et al. 2011

Recycling of Biomass Ashes

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The reutilization of biomass ashes in agriculture is important to create nutrient cycles. In field and pot experiments we investigated the fertilizing effects of different biomass ashes (rape meal ash, straw ash, and cereal ash) for eight different crops on a loamy sand and a sandy loam. Special emphasis was given to phosphorus (P). The ashes showed large differences in their elemental composition. The highest P contents (10.5%) were measured in the cereal ash, and lowest in straw ash (1% P). The solubility of P in water was low; however, about 80% of P was soluble in citric acid. Generally, the P fertilizing effect of ashes was comparable to that of highly soluble P fertilizers such as triple superphosphate. The ash supply resulted in an increase of P uptake of cultivated crops as well as in increased soil P pools (total P, water-soluble P, double-lactate-soluble P, oxalate-soluble P) and P saturation. The ash effects depended also on the cultivated crop. Good results were found in combination with phacelia, buckwheat, and maize. Provided that biomass ashes are low in heavy metals and other toxic substances, the ashes can be applied in agriculture as a valuable fertilizer.

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Role of phosphorus nutrition in development of cluster roots and release of carboxylates in soil-grown Lupinus albus

Cited by 104 publications

References 25 publications

Soil Phosphorus Uptake by Continuously Cropped Lupinus albus: A New Microcosm Design

Soil Phosphorus Uptake by Continuously Cropped Lupinus albus: A New Microcosm Design

Effect of auxin on cluster roots induction in Embothrium coccineum J.R. Forst. & G. Forst. in phosphorus deficiency condition

Phosphorus Fertilizing Effects of Biomass Ashes

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