Root surface area, as a parameter in relation to water and nutrient uptake by cucumber plant

Tachibana, Yasunori; Ohta, Yasusada

doi:10.1080/00380768.1983.10434642

Cited by 20 publications

(7 citation statements)

References 8 publications

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“…Uptake of water and nutrients in plants is dictated more by root morphological properties such as root length density and root surface area, than by root mass (Tachibana andOhta 1983, Eissenstat 1992). Nitrogen addition in our experiment significantly increased root surface area, root length density, root tip density and branching density, thereby improving capacity for N absorption.…”

Section: Fine Root Morphologymentioning

confidence: 99%

Elevated ozone prevents acquisition of available nitrogen due to smaller root surface area in poplar

et al. 2020

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Poplars are ecologically and economically important tree genus, sensitive to ozone (O3). This study aimed to investigate modifying effects of elevated O3 on poplar root response to nutrient addition. Methods 2In pot experiment, young trees of an O3-sensitive Oxford poplar clone (Populus maximoviczii Henry × berolinensis Dippel) growing in soil with three levels of P (0, 40 and 80 kg ha -1 ) and two levels of N (0 and kg ha -1 ) were exposed to three levels of O3 (ambient -AA, 1.5 x AA, 2.0 x AA) at a free air exposure facility. After one growing season, root biomass, fine root (<2 mm) nutrient concentrations and ratios, and fine root morphology were assessed. ResultsNitrogen addition resulted in an up to +100.5% increase in coarse and fine root biomass under AA, and only up to +46.3% increase under 2.0 x AA. Elevated O3 and P addition had a positive effect, while N had a negative effect on P concentrations in fine roots. Nitrogen limitation for root growth expressed as a N:P ratio was more pronounced at elevated O3.Nitrogen addition increased root surface area per soil volume by +78.3% at AA and only by +9.9% at 2.0 x AA. ConclusionsSmaller root surface area per soil volume at elevated O3 prevented acquisition of available N, rendering N fertilization of young poplar plantations in such conditions economically and environmentally questionable.

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Section: Fine Root Morphologymentioning

confidence: 99%

Elevated ozone prevents acquisition of available nitrogen due to smaller root surface area in poplar

et al. 2020

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“…In other crops, microbial inoculant increased root surface area (22–58%) and root length (28–37%) 77 . Plants with large root surface area can explore soil volume more thoroughly and acquire more nutrients 78,79 …”

Section: Discussionmentioning

confidence: 99%

Microbial consortium inoculant increases pasture grasses yield in low‐phosphorus soil by influencing root morphology, rhizosphere carboxylate exudation and mycorrhizal colonisation

et al. 2021

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BACKGROUND Pasture farming in south‐western Australia is challenged by nutrient‐poor soils. We assessed the impact of microbial consortium inoculant (MI) and rock mineral fertiliser (MF) on growth, nutrient uptake, root morphology, rhizosphere carboxylate exudation and mycorrhizal colonisation in three pasture grasses – tall fescue (Festuca arundinacea L.), veldt grass (Ehrharta calycina Sm.) and tall wheatgrass (Thinopyrum ponticum L.) grown in low‐phosphorus (P) sandy soil in a glasshouse for 30 and 60 days after sowing (DAS). RESULTS Veldt grass produced the highest specific root length and smallest average root diameter in both growth periods, and had similar shoot weight, root surface area and fine root length (except at 30 DAS) to tall fescue. Compared with the control, MI alone or combined with MF significantly increased shoot and root biomass (except root biomass at 30 DAS), likely due to the significant increases in root surface area and fine root length. Plants supplied with MI + MF had higher shoot N and P contents than those in the MI and the control treatments at 60 DAS. Malate, citrate and trans‐aconitate were the major rhizosphere carboxylates exuded at both 30 and 60 DAS. Malate exudation varied among species and treatments in both growth periods, but citrate exudation was consistently higher in the low‐P treatments (control and MI) than the MF and MI + MF treatments. CONCLUSION Microbial consortium inoculant can positively influence pasture production in low‐P soil by increasing root surface area and fine root length, whereas exudation of nutrient‐mobilising carboxylates (citrate) is dependent more on soil P supply than microbial consortium inoculant. © 2021 Society of Chemical Industry.

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“…Nevertheless, little is known about the relationship of root functional traits with plant N use strategies. Root surface area is generally correlated to plant nutrient uptake rates 36 . P. fluorescens inoculants significantly increased root surface area under eCO 2 ( Table S1 ), suggesting that P. fluorescens inoculants could enhance the potential for plant roots to acquire N under N-limited eCO 2 condition.…”

Section: Discussionmentioning

confidence: 99%

Increased plant productivity and decreased microbial respiratory C loss by plant growth-promoting rhizobacteria under elevated CO2

Nie

Bell

Wallenstein

et al. 2015

Sci Rep

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Increased plant productivity and decreased microbial respiratory C loss can potentially mitigate increasing atmospheric CO2, but we currently lack effective means to achieve these goals. Soil microbes may play critical roles in mediating plant productivity and soil C/N dynamics under future climate scenarios of elevated CO2 (eCO2) through optimizing functioning of the root-soil interface. By using a labeling technique with 13C and 15N, we examined the effects of plant growth-promoting Pseudomonas fluorescens on C and N cycling in the rhizosphere of a common grass species under eCO2. These microbial inoculants were shown to increase plant productivity. Although strong competition for N between the plant and soil microbes was observed, the plant can increase its capacity to store more biomass C per unit of N under P. fluorescens addition. Unlike eCO2 effects, P. fluorescens inoculants did not change mass-specific microbial respiration and accelerate soil decomposition related to N cycling, suggesting these microbial inoculants mitigated positive feedbacks of soil microbial decomposition to eCO2. The potential to mitigate climate change by optimizing soil microbial functioning by plant growth-promoting Pseudomonas fluorescens is a prospect for ecosystem management.

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Root surface area, as a parameter in relation to water and nutrient uptake by cucumber plant

Cited by 20 publications

References 8 publications

Elevated ozone prevents acquisition of available nitrogen due to smaller root surface area in poplar

Elevated ozone prevents acquisition of available nitrogen due to smaller root surface area in poplar

Microbial consortium inoculant increases pasture grasses yield in low‐phosphorus soil by influencing root morphology, rhizosphere carboxylate exudation and mycorrhizal colonisation

Increased plant productivity and decreased microbial respiratory C loss by plant growth-promoting rhizobacteria under elevated CO2

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