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Title: Nutrient sink limitation constrains growth in two barley species with contrasting growth strategies

Abstract

Mineral nutrients exert important limitations on plant growth. Growth is limited by the nutrient source when it is constrained by nutrient availability and uptake, which may simultaneously limit investment in photosynthetic proteins, leading to carbon source limitation. However, growth may also be limited by nutrient utilization in sink tissue. The relative importance of these processes is contested, with crop and vegetation models typically assuming source limitations of carbon and mineral nutrients (especially nitrogen). This study compared the importance of source and sink limitation on growth in a slower-growing wild perennial barley ( Hordeum bulbosum) and a faster-growing domesticated annual barley ( Hordeum vulgare), by applying a mineral nutrient treatment and measuring nitrogen uptake, growth, allocation, and carbon partitioning. We found that nitrogen uptake, growth, tillering, shoot allocation and nitrogen storage were restricted by low nutrient treatments. Multiple lines of evidence suggest that low nutrient levels do not limit growth via carbon acquisition: 1. Carbohydrate storage does not increase at high nutrient levels. 2. Ratio of free amino acids to sucrose increases at high nutrient levels. 3. Shoot allocation increases at high nutrient levels. These data indicate that barley productivity is limited by the capacity for nutrient use in growth. Asmore » a result, models must explicitly account for sink processes in order to properly simulate this mineral nutrient limitation of growth.« less

Authors:
ORCiD logo [1];  [2];  [3];  [3]
  1. Univ. of Sheffield, Sheffield (United Kingdom); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Sheffield, Sheffield (United Kingdom)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1481803
Alternate Identifier(s):
OSTI ID: 1480973; OSTI ID: 1484314
Report Number(s):
BNL-209342-2018-JAAM
Journal ID: ISSN 2475-4455
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Published Article
Journal Name:
Plant Direct
Additional Journal Information:
Journal Volume: 2; Journal Issue: 11; Journal ID: ISSN 2475-4455
Publisher:
Wiley and American Society of Plant Biologists and Society for Experimental Biology
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Barley; Crop; Growth; Nitrogen; Nutrients; Source-Sink

Citation Formats

Burnett, Angela C., Rogers, Alistair, Rees, Mark, and Osborne, Colin P.. Nutrient sink limitation constrains growth in two barley species with contrasting growth strategies. United States: N. p., 2018. Web. doi:10.1002/pld3.94.
Burnett, Angela C., Rogers, Alistair, Rees, Mark, & Osborne, Colin P.. Nutrient sink limitation constrains growth in two barley species with contrasting growth strategies. United States. doi:10.1002/pld3.94.
Burnett, Angela C., Rogers, Alistair, Rees, Mark, and Osborne, Colin P.. Mon . "Nutrient sink limitation constrains growth in two barley species with contrasting growth strategies". United States. doi:10.1002/pld3.94.
@article{osti_1481803,
title = {Nutrient sink limitation constrains growth in two barley species with contrasting growth strategies},
author = {Burnett, Angela C. and Rogers, Alistair and Rees, Mark and Osborne, Colin P.},
abstractNote = {Mineral nutrients exert important limitations on plant growth. Growth is limited by the nutrient source when it is constrained by nutrient availability and uptake, which may simultaneously limit investment in photosynthetic proteins, leading to carbon source limitation. However, growth may also be limited by nutrient utilization in sink tissue. The relative importance of these processes is contested, with crop and vegetation models typically assuming source limitations of carbon and mineral nutrients (especially nitrogen). This study compared the importance of source and sink limitation on growth in a slower-growing wild perennial barley (Hordeum bulbosum) and a faster-growing domesticated annual barley (Hordeum vulgare), by applying a mineral nutrient treatment and measuring nitrogen uptake, growth, allocation, and carbon partitioning. We found that nitrogen uptake, growth, tillering, shoot allocation and nitrogen storage were restricted by low nutrient treatments. Multiple lines of evidence suggest that low nutrient levels do not limit growth via carbon acquisition: 1. Carbohydrate storage does not increase at high nutrient levels. 2. Ratio of free amino acids to sucrose increases at high nutrient levels. 3. Shoot allocation increases at high nutrient levels. These data indicate that barley productivity is limited by the capacity for nutrient use in growth. As a result, models must explicitly account for sink processes in order to properly simulate this mineral nutrient limitation of growth.},
doi = {10.1002/pld3.94},
journal = {Plant Direct},
number = 11,
volume = 2,
place = {United States},
year = {Mon Nov 12 00:00:00 EST 2018},
month = {Mon Nov 12 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/pld3.94

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