Data from: Source-sink relationships during grain filling in wheat in response to various temperature, water deficit and nitrogen deficit regimes
Data files
Jul 16, 2024 version files 174.85 KB
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README.md
3.18 KB
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SourceSinkAllYear_DataDeposition.xlsx
167.88 KB
Abstract
Grain filling is a critical process for improving crop production under adverse conditions caused by climate change. Here, using a quantitative method, we quantified post-anthesis source-sink relationships of a large data set to assess the contribution of remobilized pre-anthesis assimilates to grain growth for both biomass and nitrogen. The data set came from 13 years’ semi-controlled field experimentation, in which six bread wheat genotypes were grown at plot scale under contrasting temperature, water, and nitrogen regimes. On average, grain biomass was ~10% higher than post-anthesis aboveground biomass accumulation across regimes and genotypes. Overall, the estimated relative contribution (%) of remobilized assimilates to grain biomass became increasingly significant with increasing stress intensity, ranging from virtually nil to 100%. This percentage was altered more by water and nitrogen regimes than by temperature, indicating the greater impact of water or nitrogen regimes relative to high temperatures under our experimental conditions. Relationships between grain nitrogen demand and post-anthesis nitrogen uptake were generally insensitive to environmental conditions, as there was always significant remobilization of nitrogen from vegetative organs, which helped to stabilize the amount of grain nitrogen. Moreover, variations in the relative contribution of remobilized assimilates with environmental variables were genotype-dependent. Our analysis provides an overall picture of post-anthesis source-sink relationships and pre-anthesis assimilate contributions to grain filling across (non-)environmental factors, and highlights that designing wheat adaption to climate change should account for complex multi-factor interactions.
Data underlying the publication:
Fang et al. (2024) Source-sink relationships during grain filling in wheat in response to various temperature, water deficit and nitrogen deficit regimes. Journal of Experimental Botany.
Creators:
- L. Fang: Centre for Crop Systems Analysis,
Wageningen University & Research
ORCID: 0000-0002-0989-0092
liangfangfj@163.com - P.C. Struik: Centre for Crop Systems Analysis,
Wageningen University & Research
ORCID: 0000-0003-2196-547X
paul.struik@wur.nl - Christine Girousse: GDEC, INRAE, Clermont Auvergne University
ORCID: 0000-0002-8914-2878
christine.girousse@inrae.fr - X. Yin: Centre for Crop Systems Analysis,
Wageningen University & Research
ORCID: 0000-0001-8273-8022
xinyou.yin@wur.nl - P. Martre: LEPSE, Univ Montpellier, INRAE, Institut Agro Montpellier
ORCID: 0000-0002-7419-6558
pierre.martre@inrae.fr
Description
This dataset contains biomass and nitrogen dynamics of during the post-anthesis period in six wheat genotypes grown under a total of 62 contrasting temperature, water, and nitrogen regimes across 13 independent experiments conducted in semi-controlled conditions under natural sunlight at INRAE, France. The objective of this study is to quantify changes in wheat post-anthesis source and sink parameters under varying environmental regimes and providing an overview of wheat post-anthesis source-sink relationships under various environmental regimes.
The detailed experimental treatments and the details of sampling and data collection can be found at Materials and Method section of the publication. Briefly, plants were sampled every 2 to 9 days between anthesis and ripeness maturity. The plants were individualized and counted, and one to three replicates of 20 plants each were analyzed separately. Stems, leaf laminae, chaffs, and grains of each subsample were separated, and their dry mass was determined after drying to constant mass in a forced air oven at 80℃. Total nitrogen concentration of oven-dried samples was determined by the Kjeldahl digestion method using a Kjeltec 2300 analyzer (Foss Tecator AB, Hoeganaes, Sweden) between 1991 and 2002, and by the Dumas combustion method using a FlashEA 19 1112 N/Protein analyzer (Thermo Electron Corp., Waltham, MA, USA) in 2007 and 2014.
FILES
This dataset contains the following file: SourceSinkAllYear_DataDeposition.xlsx. Definitions of all variables, abbreviations, and units can be found in the sheet "ReadMeFirst".
Unavailable information: In sheet "PrimaryData", missing values are indicated by "#NA" because the nitrogen content of the source and sink was not determined in some years. In "SecondaryData", "#NA" indicates missing values for nitrogen; in 2002, the total source supply for biomass or nitrogen was assumed to be zero for cultivar "Tamaro", so the values for C_TEO and C_S.mean are unavailable and indicated by "#NA" (see details in the publication).
For the processes of data collection: plants were sampled every 2 to 9 days between anthesis and ripeness maturity. Stems, leaf laminae, chaffs, and grains of each subsample were separated, and their dry mass was determined after drying to constant mass in a forced air oven at 80℃. Total nitrogen concentration of oven-dried samples was determined by the Kjeldahl digestion method using a Kjeltec 2300 analyzer (Foss Tecator AB, Hoeganaes, Sweden) between 1991 and 2002, and by the Dumas combustion method using a FlashEA 19 1112 N/Protein analyzer (Thermo Electron Corp., Waltham, MA, USA) in 2007 and 2014.