Effects of soil temperature on growth, biomass allocation and resource acquisition of Andropogon gerardii Vitman

EVAN H. DELUCIA, SCOTT A. HECKATHORN, THOMAS A. DAY

Research output: Contribution to journalArticle

Abstract

The effects of root temperature on growth and resource acquisition (carbon, nitrogen and phosphorus) were examined in Andropogon gerardii, a dominant C4 grass of tallgrass prairies of the midcontinental USA. Soil temperature (5.9 to 35.5 °C) was manipulated independently from air temperature (c. 25/20 °C day/night) in a greenhouse. Total biomass at the end of the experiment and relative growth rate (RGR) were maximum at 25 °C soil temperature (Tsoil) and decreased at higher and lower temperatures. Tsoil had no effect on leaf area ratio (the ratio of leaf area to total biomass); thus the effect of Tsoil on RGR was primarily through its influence on net assimilation rate (NAR). Different mechanisms may have contributed to decreases in NAR at sub‐ and supra‐optimal Tsoil. Soil temperatures below 20 °C caused significant reductions in foliar nitrogen (N) and phosphorus (P) concentration. High concentrations of these nutrients in roots suggest that nutrient transport was more strongly inhibited than uptake, and low foliar N and P may have contributed to reduced photosynthetic rates observed at 5 and 10 °C Tsoil. Net photosynthesis was < 12 μmol m−2 s−1 at 5 and 10 °C Tsoil and > 20 °mol m−2 s−1 at 15–40 °C. Changes in net photosynthesis did not therefore contribute to the reduction in NAR at supra‐optimal Tsoil. The strong growth dependence of A. gerardii on Tsoil indicates that this abiotic factor may significantly limit productivity in tallgrass prairie, particularly early in the growing season.

Original languageEnglish (US)
Pages (from-to)543-549
Number of pages7
JournalNew Phytologist
Volume120
Issue number4
DOIs
StatePublished - Apr 1992

Fingerprint

Andropogon
Andropogon gerardii
Resource Allocation
net assimilation rate
dry matter partitioning
Biomass
soil temperature
Soil
prairies
Temperature
leaf area
Growth
photosynthesis
phosphorus
nutrient transport
biomass
Photosynthesis
nitrogen
Phosphorus
air temperature

Keywords

  • Andropogon gerardii
  • nutrient uptake
  • photosynthesis
  • relative growth rate
  • soil temperature

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Effects of soil temperature on growth, biomass allocation and resource acquisition of Andropogon gerardii Vitman. / DELUCIA, EVAN H.; HECKATHORN, SCOTT A.; DAY, THOMAS A.

In: New Phytologist, Vol. 120, No. 4, 04.1992, p. 543-549.

Research output: Contribution to journalArticle

@article{82574bf402544031ae845d1088e63a82,
title = "Effects of soil temperature on growth, biomass allocation and resource acquisition of Andropogon gerardii Vitman",
abstract = "The effects of root temperature on growth and resource acquisition (carbon, nitrogen and phosphorus) were examined in Andropogon gerardii, a dominant C4 grass of tallgrass prairies of the midcontinental USA. Soil temperature (5.9 to 35.5 °C) was manipulated independently from air temperature (c. 25/20 °C day/night) in a greenhouse. Total biomass at the end of the experiment and relative growth rate (RGR) were maximum at 25 °C soil temperature (Tsoil) and decreased at higher and lower temperatures. Tsoil had no effect on leaf area ratio (the ratio of leaf area to total biomass); thus the effect of Tsoil on RGR was primarily through its influence on net assimilation rate (NAR). Different mechanisms may have contributed to decreases in NAR at sub‐ and supra‐optimal Tsoil. Soil temperatures below 20 °C caused significant reductions in foliar nitrogen (N) and phosphorus (P) concentration. High concentrations of these nutrients in roots suggest that nutrient transport was more strongly inhibited than uptake, and low foliar N and P may have contributed to reduced photosynthetic rates observed at 5 and 10 °C Tsoil. Net photosynthesis was < 12 μmol m−2 s−1 at 5 and 10 °C Tsoil and > 20 °mol m−2 s−1 at 15–40 °C. Changes in net photosynthesis did not therefore contribute to the reduction in NAR at supra‐optimal Tsoil. The strong growth dependence of A. gerardii on Tsoil indicates that this abiotic factor may significantly limit productivity in tallgrass prairie, particularly early in the growing season.",
keywords = "Andropogon gerardii, nutrient uptake, photosynthesis, relative growth rate, soil temperature",
author = "DELUCIA, {EVAN H.} and HECKATHORN, {SCOTT A.} and DAY, {THOMAS A.}",
year = "1992",
month = "4",
doi = "10.1111/j.1469-8137.1992.tb01804.x",
language = "English (US)",
volume = "120",
pages = "543--549",
journal = "New Phytologist",
issn = "0028-646X",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Effects of soil temperature on growth, biomass allocation and resource acquisition of Andropogon gerardii Vitman

AU - DELUCIA, EVAN H.

AU - HECKATHORN, SCOTT A.

AU - DAY, THOMAS A.

PY - 1992/4

Y1 - 1992/4

N2 - The effects of root temperature on growth and resource acquisition (carbon, nitrogen and phosphorus) were examined in Andropogon gerardii, a dominant C4 grass of tallgrass prairies of the midcontinental USA. Soil temperature (5.9 to 35.5 °C) was manipulated independently from air temperature (c. 25/20 °C day/night) in a greenhouse. Total biomass at the end of the experiment and relative growth rate (RGR) were maximum at 25 °C soil temperature (Tsoil) and decreased at higher and lower temperatures. Tsoil had no effect on leaf area ratio (the ratio of leaf area to total biomass); thus the effect of Tsoil on RGR was primarily through its influence on net assimilation rate (NAR). Different mechanisms may have contributed to decreases in NAR at sub‐ and supra‐optimal Tsoil. Soil temperatures below 20 °C caused significant reductions in foliar nitrogen (N) and phosphorus (P) concentration. High concentrations of these nutrients in roots suggest that nutrient transport was more strongly inhibited than uptake, and low foliar N and P may have contributed to reduced photosynthetic rates observed at 5 and 10 °C Tsoil. Net photosynthesis was < 12 μmol m−2 s−1 at 5 and 10 °C Tsoil and > 20 °mol m−2 s−1 at 15–40 °C. Changes in net photosynthesis did not therefore contribute to the reduction in NAR at supra‐optimal Tsoil. The strong growth dependence of A. gerardii on Tsoil indicates that this abiotic factor may significantly limit productivity in tallgrass prairie, particularly early in the growing season.

AB - The effects of root temperature on growth and resource acquisition (carbon, nitrogen and phosphorus) were examined in Andropogon gerardii, a dominant C4 grass of tallgrass prairies of the midcontinental USA. Soil temperature (5.9 to 35.5 °C) was manipulated independently from air temperature (c. 25/20 °C day/night) in a greenhouse. Total biomass at the end of the experiment and relative growth rate (RGR) were maximum at 25 °C soil temperature (Tsoil) and decreased at higher and lower temperatures. Tsoil had no effect on leaf area ratio (the ratio of leaf area to total biomass); thus the effect of Tsoil on RGR was primarily through its influence on net assimilation rate (NAR). Different mechanisms may have contributed to decreases in NAR at sub‐ and supra‐optimal Tsoil. Soil temperatures below 20 °C caused significant reductions in foliar nitrogen (N) and phosphorus (P) concentration. High concentrations of these nutrients in roots suggest that nutrient transport was more strongly inhibited than uptake, and low foliar N and P may have contributed to reduced photosynthetic rates observed at 5 and 10 °C Tsoil. Net photosynthesis was < 12 μmol m−2 s−1 at 5 and 10 °C Tsoil and > 20 °mol m−2 s−1 at 15–40 °C. Changes in net photosynthesis did not therefore contribute to the reduction in NAR at supra‐optimal Tsoil. The strong growth dependence of A. gerardii on Tsoil indicates that this abiotic factor may significantly limit productivity in tallgrass prairie, particularly early in the growing season.

KW - Andropogon gerardii

KW - nutrient uptake

KW - photosynthesis

KW - relative growth rate

KW - soil temperature

UR - http://www.scopus.com/inward/record.url?scp=0000487546&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000487546&partnerID=8YFLogxK

U2 - 10.1111/j.1469-8137.1992.tb01804.x

DO - 10.1111/j.1469-8137.1992.tb01804.x

M3 - Article

AN - SCOPUS:0000487546

VL - 120

SP - 543

EP - 549

JO - New Phytologist

JF - New Phytologist

SN - 0028-646X

IS - 4

ER -