Does Legume Root Exudation Facilitate Itself P Uptake in Intercropped Wheat?

Presti, Emilio Lo; Badagliacca, Giuseppe; Romeo, Maurizio; Monti, Michele

doi:10.1007/s42729-021-00605-x

Cited by 10 publications

(9 citation statements)

References 82 publications

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“…Recent studies have also demonstrated that root exudates can accelerate organic matter mineralization (priming effect), where exudates such as amino acids, sugars, and flavonoids mediate soil nitrogen mineralization by influencing the soil environment [ 20 ]. The various effects of root exudates can impact the nitrogen and phosphorus cycles in the rhizosphere, benefiting plants [ 21 , 22 ]. The role of root secretions extends beyond increasing nutrient availability: they also directly influence the outcomes of root–root interactions in the rhizosphere [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Root–Root Interactions on the Physiological Characteristics of Haloxylon ammodendron Seedlings

Yang,

Ji,

et al. 2024

Plants

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The root traits and response strategies of plants play crucial roles in mediating interactions between plant root systems. Current research on the role of root exudates as underground chemical signals mediating these interactions has focused mainly on crops, with less attention given to desert plants in arid regions. In this study, we focused on the typical desert plant Haloxylon ammodendron and conducted a pot experiment using three root isolation methods (plastic film separation, nylon mesh separation, and no separation). We found that (1) as the degree of isolation increased, plant biomass significantly increased (p < 0.05), while root organic carbon content exhibited the opposite trend; (2) soil electrical conductivity (EC), soil total nitrogen (STN), soil total phosphorus (STP), and soil organic carbon (SOC) were significantly greater in the plastic film and nylon mesh separation treatments than in the no separation treatment (p < 0.05), and the abundance of Proteobacteria and Actinobacteriota was significantly greater in the plastic film separation treatment than in the no separation treatment (p < 0.05); (3) both plastic film and nylon mesh separations increased the secretion of alkaloids derived from tryptophan and phenylalanine in the plant root system compared with that in the no separation treatment; and (4) Pseudomonas, Proteobacteria, sesquiterpenes, triterpenes, and coumarins showed positive correlations, while both pseudomonas and proteobacteria were significantly positively correlated with soil EC, STN, STP, and SOC (p < 0.05). Aurachin D was negatively correlated with Gemmatimonadota and Proteobacteria, and both were significantly correlated with soil pH, EC, STN, STP, and SOC. The present study revealed strong negative interactions between the root systems of H. ammodendron seedlings, in which sesquiterpenoids, triterpenoids, coumarins, and alkaloids released by the roots played an important role in the subterranean competitive relationship. This study provides a deeper understanding of intraspecific interactions in the desert plant H. ammodendron and offers some guidance for future cultivation of this species in the northwestern region of China.

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Section: Introductionmentioning

confidence: 99%

Effects of Root–Root Interactions on the Physiological Characteristics of Haloxylon ammodendron Seedlings

Yang,

Ji,

et al. 2024

Plants

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“…However, some studies found that cereals also enhanced their exudation of LMWOA in intercropping with different legumes compared to cereal monocropping. For instance, an increased concentration of different LMWOA such as malate, citrate and oxalate has been found in the rhizosphere soil of wheat in intercropping compared to monocropping when grown together with faba bean, white lupin or pea (C. Li et al, 2016; Lo Presti et al, 2021). Similarly, the malate concentration in the rhizosphere soil of maize was significantly increased by a factor of 12 in intercropping with faba bean compared to maize monocropping (H. Li et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the LMWOA composition of maize also differed significantly between mono‐ and intercropping when maize was grown together with faba bean or white lupin supplied with FePO 4 (H. Li et al, 2010). However, in many of these studies it cannot be excluded that LMWOA released by the companion plants diffused to the roots of the main crop because LMWOA were collected from the rhizosphere soil (H. Li et al, 2010; C. Li et al, 2016; Lo Presti et al, 2021; L. Wang et al, 2020). Thus, it is not known if the LMWOA are derived from the cereal or from the companion plant.…”

Section: Introductionmentioning

confidence: 99%

“…We selected contrasting companions for this experiment, two legumes (lupin and soy) and the Brassica white mustard. Root exudates were collected separately from all plant individuals using the soil‐hydroponic‐hybrid sampling approach, in contrast to previous studies that extracted LMWOA only from rhizosphere soil (H. Li et al, 2010; C. Li et al, 2016; Lo Presti et al, 2021; L. Wang et al, 2020). Root exudates were analyzed for LMWOA, pH and dissolved organic carbon (DOC).…”

Section: Introductionmentioning

confidence: 99%

“…However, in many of these studies it cannot be excluded that LMWOA released by the companion plants diffused to the roots of the main crop because LMWOA were collected from the rhizosphere soil (H. Li et al, 2010;Lo Presti et al, 2021;L. Wang et al, 2020).…”

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Lupin causes maize to increase organic acid exudation and phosphorus concentration in intercropping

Schwerdtner

Lacher

Spohn

2022

J of Sust Agri & Env

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Purpose: There is a need to develop agricultural practices that mobilize sparingly soluble soil phosphorus (P) due to increasing scarcity of P fertilizer. Interactions of different plant species in the rhizosphere might increase P mobilization, but the underlying mechanisms are still not fully understood. Methods:We conducted a pilot study with four plant species (maize, soy, lupin, mustard) grown alone and in combination with maize (intercropping) to investigate how species interact to mobilize P from iron phosphate (FePO 4 ). Root exudates of individual plants were collected and analyzed for low molecular weight organic acid anions (LMWOA) and pH.Results: Maize increased its exudation of LMWOA and its biomass P concentration in intercropping, especially when grown together with lupin. This is the first study to show unequivocally that a high LMWOA concentration in the rhizosphere in intercropping is not only caused by high LMWOA release of the companion but also by an increased LMWOA exudation of the main crop. The high release of LMWOA was associated with a higher maize P concentration, indicating that enhanced LMWOA release in intercropping is beneficial for P acquisition of maize. Moreover, lupin and mustard mobilized more P from FePO 4 than maize and soy likely through high LMWOA exudation (lupin) and rhizosphere alkalinization (mustard). Conclusion:Taken together, we reveal that intercropping with lupin increases the release of LMWOA by maize and concurrently the maize P concentration, suggesting that intercropping is useful for the mobilization of P from FePO 4 because it affects the exudation of maize.

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The potential role of durum wheat–chickpea intercropping in promoting plant growth and yield in low soil phosphorus availability under field conditions

Oubenali,

El Moukhtari,

Lamsaadi

et al. 2024

Euro-Mediterr J Environ Integr

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Does Legume Root Exudation Facilitate Itself P Uptake in Intercropped Wheat?

Cited by 10 publications

References 82 publications

Effects of Root–Root Interactions on the Physiological Characteristics of Haloxylon ammodendron Seedlings

Effects of Root–Root Interactions on the Physiological Characteristics of Haloxylon ammodendron Seedlings

Lupin causes maize to increase organic acid exudation and phosphorus concentration in intercropping

The potential role of durum wheat–chickpea intercropping in promoting plant growth and yield in low soil phosphorus availability under field conditions

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