Below-ground physiological processes enhancing phosphorus acquisition in plants

Vengavasi, Krishnapriya; Pandey, Renu; Soumya, P. R.; Hawkesford, Malcolm J.; Siddique, Kadambot H. M.

doi:10.1007/s40502-021-00627-8

Cited by 11 publications

(4 citation statements)

References 131 publications

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“…Thus, roots in these two P types of soil with low P availability accumulated 13–16% of total plant P, which was significantly higher compared to FL. This root adaptation to low P falls into a wide range of responses of root architecture development to low P availability [ 19 , 20 ]. The average root diameter was highest in TR, indicating preferred secondary/lateral root growth.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus Use Efficiency of Leafy Brassica sp. Grown in Three Contrasting Soils: Growth, Enzyme Activity and Phosphorus Fractionation

Urlić

Dumičić

Radić

et al. 2023

Plants

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Plant adaptations to low soil phosphorus (P) availability have been intensively studied in Brassica sp. in an attempt to identify the mechanisms involved in P uptake and utilization. The present pot experiment was conducted to evaluate the relationships between plant shoot and root growth, P uptake and use efficiency parameters, and P fractions and enzyme activity, in two species grown in three soil types. The aim of this study was to determine whether adaptation mechanisms are soil-dependent. Two kale species were grown in soils typical for coastal Croatia (terra rossa, rendzina, and fluvisol) with low P availability. Plants grown in fluvisol had the highest shoot biomass and accumulated most P, whereas plants developed the longest roots in terra rossa. Phosphatase activity differed among soils. P use efficiency differed among soils and species. Genotype IJK 17 showed better adaptation to low P availability, which was related to better uptake efficiency. In general, soils differed in inorganic and organic P fractions in rhizosphere soil, but no difference between genotypes was found. The activities of alkaline phosphatase and phosphodiesterase were negatively correlated with most organic P fractions, suggesting their function in the mineralization of soil organic P. Kale species activate different mechanisms of P uptake and utilization when grown in contrasting soil types, suggesting that specific responses to the soil type were more important than the genotypic difference.

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Section: Discussionmentioning

confidence: 99%

Phosphorus Use Efficiency of Leafy Brassica sp. Grown in Three Contrasting Soils: Growth, Enzyme Activity and Phosphorus Fractionation

Urlić

Dumičić

Radić

et al. 2023

Plants

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“…However, crops often absorb less than 1% of ortho-P in the soil solution, resulting in sub-optimal crop productivity [3]. Plants have developed a range of strategies to adapt to a lack of P and enhance their ability to obtain P [4,5]. Plants can boost their P-uptake efficiency by developing numerous root hairs and forming arbuscular mycorrhizal (AM) associations [6].…”

Section: Introductionmentioning

confidence: 99%

Interactions between Root Hair Development and Arbuscular Mycorrhizal Fungal Colonization in Trifoliate Orange Seedlings in Response to P Levels

Cao,

Zhao,

Xia

et al. 2024

Agriculture

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Both arbuscular mycorrhizal (AM) fungi and root hairs are crucial in facilitating plant uptake of phosphorus (P), while it is unclear whether and how they respond to varying P supplies. In order to explore how AM fungal colonization and root hair development are affected by substrate P supply, trifoliate orange (Poncirus trifoliata) seedlings were inoculated with AM fungus Rhizophagus intraradices and grown under low, moderate, and high P conditions; then, root hair morphological features and AM fungal colonization were measured. Following 120 days of AM fungal inoculation, root hair density, root hair length, AM fungal colonization rate, arbuscule colonization rate, and AM fungal colonization frequency all increased significantly under P-deficient conditions but decreased under high P conditions. Moreover, the colonization of AM fungi had a major impact on root hair formation by altering the expression of related genes and the growth of epidermal cells. The effect of AM fungi was dependent on P supply levels, as evidenced by the fact that root hair density and length increased at high P levels but decreased at low P levels. As a result, root hairs may serve as a preferential site for AM fungal colonization, and their morphology could influence the early stage of AM symbiosis establishment.

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“…Plants exposed to low N produce enhanced root length and better N remobilization (Hirel et al 2011) while most of the changes have been reported at gene level such as increased expression of nitrate and ammonium transporters (reviewed by Nacry et al 2013). Whereas several mechanisms in response to low P have been reported (Vengavasi et al 2021). These include alteration in root system architecture (e.g., increased lateral root density, length and density of root hairs, root angle, root biomass), exudation of organic substances (e.g., acid phosphatases, RNase, organic acids), and proton extrusion that mobilize xed P and enhance their uptake (Lynch and Meena et al 2021).…”

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confidence: 99%

Dual-nutrient induced stress tolerance in wheat is regulated by nitrogen and phosphorus uptake, assimilation, reutilization, and differential expression of candidate genes

Pandey,

Sharma,

Mishra

et al. 2024

Preprint

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Background and Aims We investigated genetic variability in wheat for dual-nutrient stress (DNS) tolerance in field conditions due to soil deficiencies in essential nutrients like nitrogen (N) and phosphorus (P). Most studies focus on model plants in controlled environments, but our research addresses DNS tolerance at the whole-plant level in real-world field conditions. Methods Seventy wheat genotypes were evaluated in field under low nutrient conditions (two years each for N and P). Data were subjected to principal component analysis and genotypes clustering by Ward’s method. In selected genotypes, the DNS tolerance mechanisms at physiological and molecular level were studied under different N and P treatment combinations. Results Field evaluation under low N and P demonstrated decreased total biomass and grain yield while nutrient use efficiency increased in comparison to their respective controls. The PCA (PC1+PC2) accounted for 54.1% (low N) and 56.1% (low P) genetic variability. Among genotypes, the physiological traits (biomass, N and P uptake, root morphology, N assimilation, extracellular acid phosphatase activity) were superior in HD2781, while inferior in C306 thereby, confirming the pattern obtained in the field. The expression of candidate genes involved in N and P transport, N assimilation, internal P remobilization, and transcription factors was significantly higher in HD2781 in comparison to C306. Conclusion Differential gene expression in wheat, particularly in genotype HD2781, enhances nutrient uptake, assimilation, and internal reutilization, contributing to dual-nutrient stress (DNS) tolerance. Recognizing resilient genotypes like HD2781 is crucial for sustaining wheat productivity in low-fertility soils.

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Below-ground physiological processes enhancing phosphorus acquisition in plants

Cited by 11 publications

References 131 publications

Phosphorus Use Efficiency of Leafy Brassica sp. Grown in Three Contrasting Soils: Growth, Enzyme Activity and Phosphorus Fractionation

Phosphorus Use Efficiency of Leafy Brassica sp. Grown in Three Contrasting Soils: Growth, Enzyme Activity and Phosphorus Fractionation

Interactions between Root Hair Development and Arbuscular Mycorrhizal Fungal Colonization in Trifoliate Orange Seedlings in Response to P Levels

Dual-nutrient induced stress tolerance in wheat is regulated by nitrogen and phosphorus uptake, assimilation, reutilization, and differential expression of candidate genes

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