Rooting plasticity in wild and cultivated Andean Chenopodium species under soil water deficit

Autor: Richard Joffre, Ricardo Álvarez-Flores, Thierry Winkel, Anh Nguyen-Thi-Truc, Santiago Peredo-Parada
Přispěvatelé: Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Paul-Valéry - Montpellier 3 (UM3), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
root growth
[SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/Agronomy
Taproot
Plant Science
01 natural sciences
phenotypic plasticity
Chenopodium quinoa
C. hircinum
ComputingMilieux_MISCELLANEOUS
water deficit
plant domestication
2. Zero hunger
Chenopodium pallidicaule
Biomass (ecology)
Chenopodium quinoa Willd
root topology
biology
Ecotype
Chenopodium
Plant physiology
04 agricultural and veterinary sciences
seed mass
Root architecture
Natural and human selection
C. pallidicaule
root shoot ratio
root plasticity
human and natural selection
Chenopodium hircinum
Soil Science
ecotype
root length
rhizotron
complex mixtures
plant adaptation
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
Agroecology
root system architecture
15. Life on land
biology.organism_classification
root traits
Agronomy
Rhizotron
rooting depth
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
biomass allocation
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
010606 plant biology & botany
Zdroj: Plant and Soil
Plant and Soil, Springer Verlag, 2018, 425 (1-2), pp.479-492. ⟨10.1007/s11104-018-3588-7⟩
Plant and Soil, 2018, 425 (1-2), pp.479-492. ⟨10.1007/s11104-018-3588-7⟩
ISSN: 0032-079X
1573-5036
DOI: 10.1007/s11104-018-3588-7⟩
Popis: International audience; Background and Aims: Rooting plasticity is critical for plants exploiting patchy soil-water resources, but empirical evidence remains controversial due to complex root/soil interactions in natural and agricultural environments. We compared cultivated and wild Chenopodium populations from distinct agroecological background to assess their rooting plasticity when exposed to contrasting wet-dry soil profiles in a controlled environment.Methods: Four treatments of increasing dryness were applied during 6 weeks in plants of Chenopodium hircinum, Chenopodium pallidicaule and two ecotypes (wet- and dry-habitat) of Chenopodium quinoa grown in rhizotrons. Root system architecture and growth were sequentially mapped. At the end of the experiment, plant and root morphological traits and dry biomass were measured.Results: Contrary to the other two species, C. quinoa showed accelerated taproot growth in dry soil conditions. The dry-habitat C. quinoa ecotype showed consistently higher plant traits related to longer, coarser, and more numerous root segments which give it a faster taproot growth and sustained root branching at depth in dry soil.Conclusions: High rooting plasticity confers the advantage of fast root elongation and deep soil exploration under soil water deficit. Variation in intrinsic root traits and plastic responses among Chenopodium populations controls their root foraging capacity facing patchy soil-water resources.
Databáze: OpenAIRE
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