Response to Waterlogging Stress in Wild and Domesticated Accessions of Timothy (Phleum pratense) and Its Relatives P. alpinum and P. nodosum

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Moreno, SilvanaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology (author)

Response to Waterlogging Stress in Wild and Domesticated Accessions of Timothy (Phleum pratense) and Its Relatives P. alpinum and P. nodosum

Article/chapterEnglish2023

Publisher, publication year, extent ...

2023
MDPI,2024

Numbers

LIBRIS-ID:oai:slubar.slu.se:127599
https://res.slu.se/id/publ/127599URI
https://doi.org/10.3390/plants12234033DOI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Timothy (Phleum pratense) is a cool-season perennial forage grass widely grown for silage and hay production in northern regions. Climate change scenarios predict an increase in extreme weather events with fluctuating periods of high rainfall, requiring new varieties adapted to waterlogging (WL). Wild accessions could serve as germplasm for breeding, and we evaluated the responses of 11 wild and 8 domesticated accessions of timothy, P. nodosum and P. alpinum from different locations in northern Europe. Young plants at tillering stage were exposed to WL for 21 days in a greenhouse, and responses in growth allocation and root anatomy were studied. All accessions produced adventitious roots and changed allocation of growth between shoot and root as a response to WL, but the magnitude of these responses varied among species and among accessions. P. pratense responded less in these traits in response to WL than the other two species. The ability to form aerenchyma in the root cortex in response to WL was found for all species and also varied among species and among accessions, with the highest induction in P. pratense. Interestingly, some accessions were able to maintain and even increase root growth, producing more leaves and tillers, while others showed a reduction in the root system. Shoot dry weight (SDW) was not significantly affected by WL, but some accessions showed different and significant responses in the rate of production of leaves and tillers. Overall correlations between SDW and aerenchyma and between SDW and adventitious root formation were found. This study identified two wild timothy accessions and one wild P. nodosum accession based on shoot and root system growth, aerenchyma formation and having a root anatomy considered to be favorable for WL tolerance. These accessions are interesting genetic resources and candidates for development of climate-resilient timothy varieties.

Subject headings and genre

NATURVETENSKAP Biologi Botanik hsv//swe
NATURAL SCIENCES Biological Sciences Botany hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

Bedada Chala, GirmaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)48645 (author)
Rahimi, YousefSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology (author)
Ingvarsson, PärSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology (author)
Westerbergh, AnnaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)47022 (author)
Lundquist, Per-OlofSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)47374 (author)
Sveriges lantbruksuniversitetInstitutionen för växtbiologi (creator_code:org_t)
Sveriges lantbruksuniversitet

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In:Plants122223-7747

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By the author/editor: Moreno, Silvana; Bedada Chala, Gi ...; Rahimi, Yousef; Ingvarsson, Pär; Westerbergh, Ann ...; Lundquist, Per-O ...

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Botany

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By the university: Swedish University of Agricultural Sciences

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