Journal article
Effect of heat wave on N 2 fixation and N remobilisation of lentil ( Lens culinari s MEDIK) grown under free air CO 2 enrichment in a mediterranean‐type environment
Plant biology (Stuttgart, Germany), Vol.22(S1), pp.123-132
01/2020
PMID: 31532043
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Source: InCites
Abstract
The stimulatory effect of elevated [CO2] (e[CO2]) on crop production in future climates is likely to be cancelled out by predicted increases in average temperatures. This effect may become stronger through more frequent and severe heat waves, which are predicted to increase in most climate change scenarios. Whilst the growth and yield response of some legumes grown under the interactive effect of e[CO2] and heat waves has been studied, little is known about how N2 fixation and overall N metabolism is affected by this combination.
To address these knowledge gaps, two lentil genotypes were grown under ambient [CO2] (a[CO2], ~400 µmol·mol−1) and e[CO2] (~550 µmol·mol−1) in the Australian Grains Free Air CO2 Enrichment facility and exposed to a simulated heat wave (3-day periods of high temperatures ~40 °C) at flat pod stage. Nodulation and concentrations of water-soluble carbohydrates (WSC), total free amino acids, N and N2 fixation were assessed following the imposition of the heat wave until crop maturity.
Elevated [CO2] stimulated N2 fixation so that total N2 fixation in e[CO2]-grown plants was always higher than in a[CO2], non-stressed control plants. Heat wave triggered a significant decrease in active nodules and WSC concentrations, but e[CO2] had the opposite effect. Leaf N remobilization and grain N improved under interaction of e[CO2] and heat wave.
These results suggested that larger WSC pools and nodulation under e[CO2] can support post-heat wave recovery of N2 fixation. Elevated [CO2]-induced accelerated leaf N remobilisation might contribute to restore grain N concentration following a heat wave.
Details
- Title
- Effect of heat wave on N 2 fixation and N remobilisation of lentil ( Lens culinari s MEDIK) grown under free air CO 2 enrichment in a mediterranean‐type environment
- Creators
- S Parvin - Southern Cross Plant Science Southern Cross University Lismore NSW Australia, School of Ecosystem and Forest Sciences The University of Melbourne Creswick Vic. Australia, Department of Agronomy Bangladesh Agricultural University Mymensingh BangladeshS Uddin - Department of Agronomy Bangladesh Agricultural University Mymensingh Bangladesh, NSW Department of Primary Industries Wagga Wagga Agricultural Institute Wagga Wagga NSW Australia, Faculty of Veterinary and Agricultural Sciences The University of Melbourne Creswick Vic. AustraliaM Bourgault - Northern Agricultural Research Centre Montana State University Havre MT USAA Delahunty - Agriculture Victoria Research Horsham Vic. AustraliaJ Nuttall - Agriculture Victoria Research Horsham Vic. AustraliaJ Brand - Agriculture Victoria Research Horsham Vic. AustraliaG O'Leary - Agriculture Victoria Research Horsham Vic. AustraliaG. J Fitzgerald - Faculty of Veterinary and Agricultural Sciences The University of Melbourne Creswick Vic. Australia, Agriculture Victoria Research Horsham Vic. AustraliaR Armstrong - Agriculture Victoria Research Horsham Vic. Australia, Department of Animal, Plant and Soil Sciences La Trobe University Bundoora Vic. AustraliaM Tausz - Department of Agriculture, Science and the Environment School of Health, Medical and Applied Science CQUniversity Australia Rockhampton Qld Australia
- Contributors
- L. J De Kok (Editor)
- Publication Details
- Plant biology (Stuttgart, Germany), Vol.22(S1), pp.123-132
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Grant note
- Australian Commonwealth Department of Agriculture and Water Resources. Grant Number: FtRG1193982 Grain Research and Development Corporation. Grant Number: DAV00137 Australian Research Council (ARC) Albert Shimmins Fund, We gratefully acknowledge the contribution of all AGFACE team. SP received a Melbourne International Research Scholarship and Postgraduate Writing-Up Grant supported by the Albert Shimmins Fund.
- Identifiers
- 991012925096502368
- Academic Unit
- Faculty of Science and Engineering; Science
- Language
- English
- Resource Type
- Journal article