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dc.contributor.authorFörster, Lena
dc.contributor.authorGrant, Jim
dc.contributor.authorMichel, Thibauld
dc.contributor.authorNg, Carl
dc.contributor.authorBarth, Susanne
dc.identifier.citationFörster L, Grant J, Michel T, Ng C, Barth S. 2018. Growth under cold conditions in a wide perennial ryegrass panel is under tight physiological control. PeerJ 6:e5520
dc.description.abstractBackground. Perennial ryegrass is a cool-season grass species from the family Poaceae and is widely cultivated in temperate regions because it exhibits rapid growth and establishment, and possesses high forage quality. The extension of the growing season in Ireland in spring and autumn is a breeding target to make farming more profitable since a grass-fed diet based on grazing is the cheapest way of nutrition for ruminants. Methods. Fifty-seven perennial ryegrass accessions were screened for their ability to grow under typical Irish spring conditions as taken from long term temperature records in controlled climate chambers. They were grown in low temperature (8 ◦C/2 ◦C day/night) and control conditions (15 ◦C/8 ◦C day/night) in three consecutive independent experiments. Fresh weight, height, chlorophyll content and electrolyte leakage were measured, and these parameters were used to rank plant performance under low temperature growth conditions. Results. The results showed that height, yield and electrolyte leakage are excellent measures for the impact of cold stress tolerance. Little variation in growth was seen under cold stress, but a wide variety of responses were observed under control conditions. Discussion. Our results suggest that cold stress is under tight physiological control. Interestingly, the various genotypes responded differentially to more amenable control conditions, indicating that a quick response to more amenable growth conditions is a better target for breeding programmes.en_US
dc.relation.ispartofseriesPlant Biology;Vol 6
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.subjectCold stressen_US
dc.subjectPerennial ryegrassen_US
dc.subjectAcclimation to cold stressen_US
dc.subjectPhysiological controlen_US
dc.subjectVariation in germplasmen_US
dc.titleGrowth under cold conditions in a wide perennial ryegrass panel is under tight physiological controlen_US
dc.contributor.sponsorTeagasc Walsh Fellowshipen_US
dc.contributor.sponsorIrish Department of Agriculture, Food and the Marineen_US

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Attribution-NonCommercial-ShareAlike 4.0 International
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