Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

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Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging. / Kumar, Amit; van Duijnen, Richard; Delory, Benjamin; Reichel, Rüdiger; Brüggemann, Nicolas; Temperton, Victoria Martine.

in: Plant and Soil, Jahrgang 453, Nr. 1-2, 01.08.2020, S. 515-528.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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@article{c4884506cbb5485b948349995b4a440d,
title = "Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging",
abstract = "Aims: Root system responses to the limitation of eithernitrogen (N) or phosphorus (P) are well documented,but how the early root system responds to (co-) limitation of one (N or P) or both in a stoichiometric framework is not well-known. In addition, how intraspecificcompetition alters plant responses to N:P stoichiometryis understudied. Therefore, we aimed to investigate theeffects of N:P stoichiometry and competition on rootsystem responses and overall plant performance. Methods: Plants (Hordeum vulgareL.) were grown inrhizoboxes for 24 days in the presence or absence ofcompetition (three vs. one plant per rhizobox), andfertilized with different combinations of N:P (low N +low P, low N + high P, high N + low P, and high N +high P). Results: Shoot biomass was highest when both N and Pwere provided in high amounts. In competition, shootbiomass decreased on average by 22%. Total root biomass (per plant) was not affected by N:P stoichiometryand competition but differences were observed in specific root length and root biomass allocation across soildepths. Specific root length depended on the identity oflimiting nutrient (N or P) and competition. Plants hadhigher proportion of root biomass in deeper soil layersunder N limitation, while a greater proportion of rootbiomass was found at the top soil layers under Plimitation. Conclusions: With low N and P availability during earlygrowth, higher investments in root system developmentcan significantly trade off with aboveground productivity, and strong intraspecific competition can furtherstrengthen such effects.",
keywords = "Ecosystems Research, Root system responses, vertical root distribution, specific root length, nutrient stoichiometry, instraspecific competition, Root system responses, vertical root distribution, specific root length, nutrient stoichiometry, Intraspecific competition",
author = "Amit Kumar and {van Duijnen}, Richard and Benjamin Delory and R{\"u}diger Reichel and Nicolas Br{\"u}ggemann and Temperton, {Victoria Martine}",
year = "2020",
month = aug,
day = "1",
doi = "10.1007/s11104-020-04626-w",
language = "English",
volume = "453",
pages = "515--528",
journal = "Plant and Soil",
issn = "0032-079X",
publisher = "Springer",
number = "1-2",

}

RIS

TY - JOUR

T1 - Barley shoot biomass responds strongly to N:P stoichiometry and intraspecific competition, whereas roots only alter their foraging

AU - Kumar, Amit

AU - van Duijnen, Richard

AU - Delory, Benjamin

AU - Reichel, Rüdiger

AU - Brüggemann, Nicolas

AU - Temperton, Victoria Martine

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Aims: Root system responses to the limitation of eithernitrogen (N) or phosphorus (P) are well documented,but how the early root system responds to (co-) limitation of one (N or P) or both in a stoichiometric framework is not well-known. In addition, how intraspecificcompetition alters plant responses to N:P stoichiometryis understudied. Therefore, we aimed to investigate theeffects of N:P stoichiometry and competition on rootsystem responses and overall plant performance. Methods: Plants (Hordeum vulgareL.) were grown inrhizoboxes for 24 days in the presence or absence ofcompetition (three vs. one plant per rhizobox), andfertilized with different combinations of N:P (low N +low P, low N + high P, high N + low P, and high N +high P). Results: Shoot biomass was highest when both N and Pwere provided in high amounts. In competition, shootbiomass decreased on average by 22%. Total root biomass (per plant) was not affected by N:P stoichiometryand competition but differences were observed in specific root length and root biomass allocation across soildepths. Specific root length depended on the identity oflimiting nutrient (N or P) and competition. Plants hadhigher proportion of root biomass in deeper soil layersunder N limitation, while a greater proportion of rootbiomass was found at the top soil layers under Plimitation. Conclusions: With low N and P availability during earlygrowth, higher investments in root system developmentcan significantly trade off with aboveground productivity, and strong intraspecific competition can furtherstrengthen such effects.

AB - Aims: Root system responses to the limitation of eithernitrogen (N) or phosphorus (P) are well documented,but how the early root system responds to (co-) limitation of one (N or P) or both in a stoichiometric framework is not well-known. In addition, how intraspecificcompetition alters plant responses to N:P stoichiometryis understudied. Therefore, we aimed to investigate theeffects of N:P stoichiometry and competition on rootsystem responses and overall plant performance. Methods: Plants (Hordeum vulgareL.) were grown inrhizoboxes for 24 days in the presence or absence ofcompetition (three vs. one plant per rhizobox), andfertilized with different combinations of N:P (low N +low P, low N + high P, high N + low P, and high N +high P). Results: Shoot biomass was highest when both N and Pwere provided in high amounts. In competition, shootbiomass decreased on average by 22%. Total root biomass (per plant) was not affected by N:P stoichiometryand competition but differences were observed in specific root length and root biomass allocation across soildepths. Specific root length depended on the identity oflimiting nutrient (N or P) and competition. Plants hadhigher proportion of root biomass in deeper soil layersunder N limitation, while a greater proportion of rootbiomass was found at the top soil layers under Plimitation. Conclusions: With low N and P availability during earlygrowth, higher investments in root system developmentcan significantly trade off with aboveground productivity, and strong intraspecific competition can furtherstrengthen such effects.

KW - Ecosystems Research

KW - Root system responses

KW - vertical root distribution

KW - specific root length

KW - nutrient stoichiometry

KW - instraspecific competition

KW - Root system responses

KW - vertical root distribution

KW - specific root length

KW - nutrient stoichiometry

KW - Intraspecific competition

UR - http://www.scopus.com/inward/record.url?scp=85087743881&partnerID=8YFLogxK

U2 - 10.1007/s11104-020-04626-w

DO - 10.1007/s11104-020-04626-w

M3 - Journal articles

VL - 453

SP - 515

EP - 528

JO - Plant and Soil

JF - Plant and Soil

SN - 0032-079X

IS - 1-2

ER -

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