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RESEARCH ARTICLE

A quantitative revision of the waterlogging tolerance of perennial forage grasses

Carla E. Di Bella https://orcid.org/0000-0002-7641-3288 A B * , Agustín A. Grimoldi https://orcid.org/0000-0001-7075-1879 A B and Gustavo G. Striker https://orcid.org/0000-0002-6395-6734 A C D
+ Author Affiliations
- Author Affiliations

A IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Avenue San Martín 4453 - C1417DSE, Buenos Aires, Argentina.

B Universidad de Buenos Aires, Facultad de Agronomía, Departamento de Producción Animal, Cátedra de Forrajicultura, Buenos Aires, Argentina.

C Universidad de Buenos Aires, Facultad de Agronomía, Departamento Biología Aplicada y Alimentos, Cátedra de Fisiología Vegetal, Buenos Aires, Argentina.

D School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.

* Correspondence to: dibella@agro.uba.ar

Handling Editor: Zed Rengel

Crop & Pasture Science 73(10) 1200-1212 https://doi.org/10.1071/CP21707
Submitted: 24 June 2021  Accepted: 15 March 2022   Published: 4 April 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Waterlogging tolerance of eight C4 and seven C3 perennial forage grasses was reviewed. The median waterlogging duration was similar between species’ type, ranging between 18 and 21 days. Inter- and intra-species variability was found in shoot and root biomass in response to waterlogging. Urochloa brizantha (C4), Brachiaria hybrid (C4) and Dactylis glomerata (C3) were the less tolerant species to waterlogging (shoot biomass median of 45%, 53% and 80% of controls), while U. humidicola (C4), Paspalum dilatatum (C4), Festuca arundinacea (C3) and Lolium perenne (C3) were the most tolerant (shoot biomass median of 97%, 101%, 87% and 94% of controls). A similar ranking of responses was found among species for root biomass. The formation of aerenchyma/root porosity (a key trait for waterlogging tolerance) was evaluated mainly in U. humidicola and P. dilatatum (C4 waterlogging-tolerant species), which showed considerable constitutive porosity (13% and 32%) and final values of 30% and 41% under waterlogging. Net photosynthesis and stomatal conductance as typical leaf physiological responses matched species’ waterlogging tolerance, with the impact of hypoxia higher in C3 than in C4 species. Gaps in knowledge about waterlogging tolerance in forage grasses are: (i) additional studies on C3 perennial grasses for temperate pasture areas prone to waterlogging, (ii) identification of traits and responses aiding plant recovery after waterlogging (and also during the stress), (iii) reassessment of waterlogging tolerance considering plant developmental stage (e.g. adult vs young plants), and (iv) evaluation of sequential (i.e. waterlogging − drought) and combined (i.e. waterlogging + salinity) stresses, which often co-occur in pasture lands.

Keywords: aerenchyma, C3, C4, flooding, hypoxia, pastures, root porosity, waterlogging duration.


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