Hungry and thirsty: Effects of CO2 and limited water availability on plant performance

Andries A. Temme, Jin Chun Liu, Will K. Cornwell, Rien Aerts, Johannes H.C. Cornelissen

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Carbon dioxide and water are crucial resources for plant growth. With anthropogenic fossil fuel emissions, CO2 availability is and has been increasing since the last glacial maximum. Simultaneously water availability is expected to decrease and the frequency and severity of drought episodes to increase in large parts of the world. How plants respond to these two changes will help in understanding plants’ responses to climate of the future. Here we sought to understand how drought affects plant traits responses to CO2 and whether there are trade-offs in responsiveness to low and elevated CO2 and drought. We grew seedlings of seven C3 annuals at past low (160 μl l−1), ambient (450 μl l−1) and elevated (750 μl l−1) CO2. At each concentration plants were subjected to well-watered conditions (100% soil water availability, SWA), 40% SWA or 20% SWA. We measured biomass allocation, relative growth rate, tissue N concentration, and gas exchange. Compared to well-watered conditions plant size was an important element in the absolute response to SWA decrease, i.e. the smaller, slow growing species were unaffected by drought at low CO2. Plants allocated less mass to root tissue at low CO2 contrasting with increased root mass fraction at lower SWA at ambient CO2. Across all traits measured, we found mostly additive effects of CO2 and water. As due to climate change regions become more drought prone these results suggest CO2 fertilization will not counteract the effects of reduced water availability.

Original languageEnglish
JournalFlora: Morphology, Distribution, Functional Ecology of Plants
DOIs
Publication statusPublished - 10 May 2019

Fingerprint

water availability
carbon dioxide
plant available water
soil water
drought
water
well
biomass allocation
effect
gas exchange
Last Glacial Maximum
fossil fuel
response elements
fossil fuels
dry matter partitioning
seedling
additive effect
plant response
climate change
climate

Keywords

  • Annual C herbs
  • Biomass allocation
  • Drought
  • Elevated CO
  • Gas exchange
  • Growth
  • Plant traits

Cite this

@article{87ce98282f6d4ab39e4ad4ba337c2aa0,
title = "Hungry and thirsty: Effects of CO2 and limited water availability on plant performance",
abstract = "Carbon dioxide and water are crucial resources for plant growth. With anthropogenic fossil fuel emissions, CO2 availability is and has been increasing since the last glacial maximum. Simultaneously water availability is expected to decrease and the frequency and severity of drought episodes to increase in large parts of the world. How plants respond to these two changes will help in understanding plants’ responses to climate of the future. Here we sought to understand how drought affects plant traits responses to CO2 and whether there are trade-offs in responsiveness to low and elevated CO2 and drought. We grew seedlings of seven C3 annuals at past low (160 μl l−1), ambient (450 μl l−1) and elevated (750 μl l−1) CO2. At each concentration plants were subjected to well-watered conditions (100{\%} soil water availability, SWA), 40{\%} SWA or 20{\%} SWA. We measured biomass allocation, relative growth rate, tissue N concentration, and gas exchange. Compared to well-watered conditions plant size was an important element in the absolute response to SWA decrease, i.e. the smaller, slow growing species were unaffected by drought at low CO2. Plants allocated less mass to root tissue at low CO2 contrasting with increased root mass fraction at lower SWA at ambient CO2. Across all traits measured, we found mostly additive effects of CO2 and water. As due to climate change regions become more drought prone these results suggest CO2 fertilization will not counteract the effects of reduced water availability.",
keywords = "Annual C herbs, Biomass allocation, Drought, Elevated CO, Gas exchange, Growth, Plant traits",
author = "Temme, {Andries A.} and Liu, {Jin Chun} and Cornwell, {Will K.} and Rien Aerts and Cornelissen, {Johannes H.C.}",
year = "2019",
month = "5",
day = "10",
doi = "10.1016/j.flora.2018.11.006",
language = "English",
journal = "Flora",
issn = "0367-2530",
publisher = "Elsevier",

}

Hungry and thirsty : Effects of CO2 and limited water availability on plant performance. / Temme, Andries A.; Liu, Jin Chun; Cornwell, Will K.; Aerts, Rien; Cornelissen, Johannes H.C.

In: Flora: Morphology, Distribution, Functional Ecology of Plants, 10.05.2019.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Hungry and thirsty

T2 - Effects of CO2 and limited water availability on plant performance

AU - Temme, Andries A.

AU - Liu, Jin Chun

AU - Cornwell, Will K.

AU - Aerts, Rien

AU - Cornelissen, Johannes H.C.

PY - 2019/5/10

Y1 - 2019/5/10

N2 - Carbon dioxide and water are crucial resources for plant growth. With anthropogenic fossil fuel emissions, CO2 availability is and has been increasing since the last glacial maximum. Simultaneously water availability is expected to decrease and the frequency and severity of drought episodes to increase in large parts of the world. How plants respond to these two changes will help in understanding plants’ responses to climate of the future. Here we sought to understand how drought affects plant traits responses to CO2 and whether there are trade-offs in responsiveness to low and elevated CO2 and drought. We grew seedlings of seven C3 annuals at past low (160 μl l−1), ambient (450 μl l−1) and elevated (750 μl l−1) CO2. At each concentration plants were subjected to well-watered conditions (100% soil water availability, SWA), 40% SWA or 20% SWA. We measured biomass allocation, relative growth rate, tissue N concentration, and gas exchange. Compared to well-watered conditions plant size was an important element in the absolute response to SWA decrease, i.e. the smaller, slow growing species were unaffected by drought at low CO2. Plants allocated less mass to root tissue at low CO2 contrasting with increased root mass fraction at lower SWA at ambient CO2. Across all traits measured, we found mostly additive effects of CO2 and water. As due to climate change regions become more drought prone these results suggest CO2 fertilization will not counteract the effects of reduced water availability.

AB - Carbon dioxide and water are crucial resources for plant growth. With anthropogenic fossil fuel emissions, CO2 availability is and has been increasing since the last glacial maximum. Simultaneously water availability is expected to decrease and the frequency and severity of drought episodes to increase in large parts of the world. How plants respond to these two changes will help in understanding plants’ responses to climate of the future. Here we sought to understand how drought affects plant traits responses to CO2 and whether there are trade-offs in responsiveness to low and elevated CO2 and drought. We grew seedlings of seven C3 annuals at past low (160 μl l−1), ambient (450 μl l−1) and elevated (750 μl l−1) CO2. At each concentration plants were subjected to well-watered conditions (100% soil water availability, SWA), 40% SWA or 20% SWA. We measured biomass allocation, relative growth rate, tissue N concentration, and gas exchange. Compared to well-watered conditions plant size was an important element in the absolute response to SWA decrease, i.e. the smaller, slow growing species were unaffected by drought at low CO2. Plants allocated less mass to root tissue at low CO2 contrasting with increased root mass fraction at lower SWA at ambient CO2. Across all traits measured, we found mostly additive effects of CO2 and water. As due to climate change regions become more drought prone these results suggest CO2 fertilization will not counteract the effects of reduced water availability.

KW - Annual C herbs

KW - Biomass allocation

KW - Drought

KW - Elevated CO

KW - Gas exchange

KW - Growth

KW - Plant traits

UR - http://www.scopus.com/inward/record.url?scp=85056991422&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056991422&partnerID=8YFLogxK

U2 - 10.1016/j.flora.2018.11.006

DO - 10.1016/j.flora.2018.11.006

M3 - Article

JO - Flora

JF - Flora

SN - 0367-2530

ER -