Celina I. Borrajo

Universidade de Vigo

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Manuel J. Reigosa

Universidade de Vigo

Adela M. Sánchez‐Moreiras

Universidade de Vigo

Adela Sánchez Moreiras

University of Georgia

Luis Gándara

National Agricultural Technology Institute

M. Mercedes Pereira

National Agricultural Technology Institute

J.A. Fernández

Universidad Politécnica de Cartagena

Sara Isabel Alonso

National University of Mar del Plata

Juan A. FernÃ¡ndez

Jorge A. Castaño

Universidad del Valle

Luis GÃ¡ndara

Cooperative Institutions

National Agricultural Technology Institute

National University of Mar del Plata

Universidade de Vigo

Faculty (United Kingdom)

National University of the Northeast

Consejo Superior de Investigaciones Científicas

Universidade de Santiago de Compostela

Universidad del Valle

Universidad de Antioquia

Universidad Pontificia Bolivariana

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Morpho-physiological responses of tall wheatgrass populations to different levels of water stress

PLoS ONE (2018)

Celina I. Borrajo Adela M. Sánchez‐Moreiras Manuel J. Reigosa

Tall wheatgrass [Elymus elongatus subsp. ponticus (Podp.) Melderis] is a perennial forage grass cultivated in dry, saline or alkaline environments. The morpho-physiological characteristics of four populations of tall wheatgrass from different climatic-edaphic origins were evaluated under three conditions of water stress (100%-50%-30% of field capacity). The trial was analyzed with three replicates and two-factor ANOVA in pots within the greenhouse during 35 days. Only dry matter and tiller number showed interaction between populations and water conditions. The most relevant changes in morpho-physiological parameters under strong water stress were reduced dry matter production (48-32% differing among populations), smaller leaf and tiller size (46% and 28%), together with higher water use efficiency (74%), and increased proline and protein contents (144% and 71%), smaller tiller number (30-11% differing among populations) and a slight decrease in leaf water content (3%). The populations differed in growth strategies and morpho-physiological mechanisms to survive water stress, which could be related to their habitat background. The study shows the stability in dry matter production under all levels of water stress, which can be related to the higher tiller number. Due to this plasticity, tall wheatgrass should be studied as a species with great potential to adapt to drought stress.

Tiller (botany)

Edaphic

10.1371/journal.pone.0209281

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Citations (24)

Morpho‐physiological, biochemical and isotopic response of tall wheatgrass populations to salt stress

Journal of Agronomy and Crop Science (2020)

Celina I. Borrajo Adela M. Sánchez‐Moreiras Manuel J. Reigosa

Abstract Tall wheatgrass [ Elymus elongatus subsp. ponticus (Podp.) Melderis] is a C3 grass native from dry or saline habitats in SE Europe. The aim of this study was to better understand response mechanisms of populations from different origins to salinity and to provide new tools to select germoplasm with high salinity tolerance. Four populations (P3‐P4‐P5‐P9) were irrigated with five solutions of increasing salinity (Salt: 0–0.1–0.2–0.3–0.4 M NaCl) and evaluated in pots in a greenhouse. Two experiments were carried out, a short 40‐day long experiment with vegetative plants, and a longer 85‐day long one with plants that underwent vegetative‐reproductive stage. No evidence was found of an interaction between population and salt. Morpho‐physiological, biochemicals, isotopic and productive variables were differently affected by increasing salinity and were also different among populations. Proline, Na + and Cl − consistently appeared to function as osmotic agents. P5 showed the highest biomass in the 85‐day experiment and had the highest leaf length, tiller density, water use efficiency and δ 13 C isotope; and the lowest Cl − concentration and evapotranspiration rate. However, P5 showed the lowest biomass in the 40‐day experiment, suggesting that duration of the stress is an important aspect to consider when selecting germoplasm for tolerance to salinity. Differences among populations in growth strategies and physiological mechanisms could be related to their origin environment.

Tiller (botany)

Osmoregulation

Water Use Efficiency

10.1111/jac.12461

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Citations (4)

Determinants of tall wheatgrass biomass under water and salt stress

Celina I. Borrajo Adela Sánchez Moreiras Manuel J. Reigosa

Water Stress

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Efecto de la fertilización nitrogenada y la edad del rebrote sobre el valor nutritivo de Brachiaria brizantha cv. "Marandú" - Efect of age regrowth and nitrogen fertilization on the nutritive value of Brachiaria brizantha cv. "Marandú"

Revista de la Facultad de Ciencias Agrarias UNCuyo (2017)

Luis Gándara Celina I. Borrajo J.A. Fernández Mercedes Pereira

Nitrogen fertilizer

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¿Podemos a través de imágenes satelitales detectar pasturas de festuca alta infectadas con endófito? Una propuesta para mapear la vulnerabilidad a la festucosis en el sudeste bonaerense.

Luciano Lacoste Lucas Ricardo Petigrosso Florencia Jaimes Celina I. Borrajo Jorge A. Castaño

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Response of tall wheatgrass populations to combined water and salt stress: abstract

Celina I. Borrajo Adela Sánchez Moreiras Manuel J. Reigosa

Water Stress

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Cambios en producción y calidad del forraje otoño-invernal por el agregado de nitrógeno en materiales geneticos de agropiro

Ciencia del suelo (2000)

Sara Isabel Alonso Javier A. Fernández Celina I. Borrajo

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Citations (3)

Efecto de la fertilizaciÃ³n nitrogenada y la edad del rebrote sobre el valor nutritivo de Brachiaria brizantha cv. "MarandÃº"

DOAJ (DOAJ: Directory of Open Access Journals) (2017)

Luis GÃ¡ndara Celina I. Borrajo Juan A. FernÃ¡ndez M. Mercedes Pereira

Brachiaria

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Ecophysiological Responses of Tall Wheatgrass Germplasm to Drought and Salinity

Plants (2022)

Celina I. Borrajo Adela M. Sánchez‐Moreiras Manuel J. Reigosa

Tall wheatgrass (Thinopyrum ponticum (Podp.) Barkworth and D.R. Dewey) is an important, highly salt-tolerant C3 forage grass. The objective of this work was to learn about the ecophysiological responses of accessions from different environmental origins under drought and salinity conditions, to provide information for selecting superior germplasm under combined stress in tall wheatgrass. Four accessions (P3, P4, P5, P9) were irrigated using combinations of three salinity levels (0, 0.1, 0.3 M NaCl) and three drought levels (100%, 50%, 30% water capacity) over 90 days in a greenhouse. The control treatment showed the highest total biomass, but water-use efficiency (WUE), δ13C, proline, N concentration, leaf length, and tiller density were higher under moderate drought or/and salinity stress than under control conditions. In tall wheatgrass, K+ functions as an osmoregulator under drought, attenuated by salinity, and Na+ and Cl- function as osmoregulators under salinity and drought, while proline is an osmoprotector under both stresses. P3 and P9, from environments with mild/moderate stress, prioritized reproductive development, with high evapotranspiration and the lowest WUE and δ13C values. P4 and P5, from more stressful environments, prioritized vegetative development through tillering, showing the lowest evapotranspiration, the highest δ13C values, and different mechanisms for limiting transpiration. The δ13C value, leaf biomass, tiller density, and leaf length had high broad-sense heritability (H2), while the Na+/K+ ratio had medium H2. In conclusion, the combined use of the δ13C value, Na+/K+ ratio, and canopy structural variables can help identify accessions that are well-adapted to drought and salinity, also considering the desirable plant characteristics. Tall wheatgrass stress tolerance could be used to expand forage production under a changing climate.

Tiller (botany)

Water Use Efficiency

Germ plasm

Drought Tolerance

Stomatal Conductance

10.3390/plants11121548

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Citations (11)

An Argentinean germplasm collection of slender wild oat (Avena barbata.

Plant Genetic Resources Newsletter (2000)

Sara Isabel Alonso Celina I. Borrajo

Germ plasm