Grain carbon isotope composition is a marker for allocation and harvest index in wheat.

Autor: Domergue JB; Institut de Recherche en Horticulture et Semences, Université d'Angers, INRAe, Beaucouzé, France., Abadie C; Institut de Recherche en Horticulture et Semences, Université d'Angers, INRAe, Beaucouzé, France., Lalande J; Institut de Recherche en Horticulture et Semences, Université d'Angers, INRAe, Beaucouzé, France., Deswarte JC; Arvalis Institut du Végétal, Pôle valorisation de l'écophysiologie, ZA des Graviers, Villiers le Bâcle, France., Ober E; National Institute of Agricultural Botany, Cambridge, UK., Laurent V; Florimond Desprez Veuve et fils, Cappelle-en-Pévèle, France., Zimmerli C; BASF France S.A.S., La Ferme du Paly, Milly-la-Forêt, France., Lerebour P; Unisigma, GIE Recherche et Création Variétale, Froissy, France., Duchalais L; RAGT 2n, Route Epincy, Louville-la-Chenard, France., Bédard C; Secobra Recherches, Centre de Bois-Henry, Maule, France., Derory J; Limagrain Europe, Centre de recherche, Gerzat, France., Moittie T; ASUR Plant Breeding, Estrées-Saint-Denis, France., Lamothe-Sibold M; Plateforme Metabolisme Metabolome, SPOmics plant métabolisme métabolome platform, Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRAe, University Paris-Saclay, Orsay, France., Beauchêne K; Arvalis Institut du Végétal, Pôle PhenoHD3, Beauce-La-Romaine, France., Limami AM; Institut de Recherche en Horticulture et Semences, Université d'Angers, INRAe, Beaucouzé, France., Tcherkez G; Institut de Recherche en Horticulture et Semences, Université d'Angers, INRAe, Beaucouzé, France.; Research School of Biology, ANU College of Science, Australian National University, Canberra, Australian Capital Territory, Australia.
Jazyk: angličtina
Zdroj: Plant, cell & environment [Plant Cell Environ] 2022 Jul; Vol. 45 (7), pp. 2145-2157. Date of Electronic Publication: 2022 May 09.
DOI: 10.1111/pce.14339
Abstrakt: The natural 13 C abundance (δ 13 C) in plant leaves has been used for decades with great success in agronomy to monitor water-use efficiency and select modern cultivars adapted to dry conditions. However, in wheat, it is also important to find genotypes with high carbon allocation to spikes and grains, and thus with a high harvest index (HI) and/or low carbon losses via respiration. Finding isotope-based markers of carbon partitioning to grains would be extremely useful since isotope analyses are inexpensive and can be performed routinely at high throughput. Here, we took the advantage of a set of field trials made of more than 600 plots with several wheat cultivars and measured agronomic parameters as well as δ 13 C values in leaves and grains. We find a linear relationship between the apparent isotope discrimination between leaves and grain (denoted as Δδ corr ), and the respiration use efficiency-to-HI ratio. It means that overall, efficient carbon allocation to grains is associated with a small isotopic difference between leaves and grains. This effect is explained by postphotosynthetic isotope fractionations, and we show that this can be modelled by equations describing the carbon isotope composition in grains along the wheat growth cycle. Our results show that 13 C natural abundance in grains could be useful to find genotypes with better carbon allocation properties and assist current wheat breeding technologies.
(© 2022 The Authors. Plant, Cell & Environment published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: