Latitudinal variation In ambient UV-B radiation is an important determinant of Lolium perenne forage production, quality, and digestibility

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Latitudinal variation In ambient UV-B radiation is an important determinant of Lolium perenne forage production, quality, and digestibility. / Comont, David Charles; Winters, Ana Louise; Gomez, Leonardo D; McQueen-Mason, Simon J.; Gwynn-Jones, Dylan.

In: Journal of Experimental Botany, Vol. 64, No. 8, 05.2013, p. 2193-2204.

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Comont, David Charles ; Winters, Ana Louise ; Gomez, Leonardo D ; McQueen-Mason, Simon J. ; Gwynn-Jones, Dylan. / Latitudinal variation In ambient UV-B radiation is an important determinant of Lolium perenne forage production, quality, and digestibility. In: Journal of Experimental Botany. 2013 ; Vol. 64, No. 8. pp. 2193-2204.

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@article{9865e9bf8f0f4352afa3b174627d1d45,
title = "Latitudinal variation In ambient UV-B radiation is an important determinant of Lolium perenne forage production, quality, and digestibility",
abstract = "Few studies to date have considered the responses of agriculturally important forage grasses to UV-B radiation. Yet grasses such as Lolium perenne have a wide current distribution, representing exposure to a significant variation in ambient UV-B. The current study investigated the responses of L. perenne (cv. AberDart) to a simulated latitudinal gradient of UV-B exposure, representing biologically effective UV-B doses at simulated 70, 60, 50, 40, and 30° N latitudes. Aspects of growth, soluble compounds, and digestibility were assessed, and results are discussed in relation to UV-B effects on forage properties and the implications for livestock and bio-ethanol production. Aboveground biomass production was reduced by approximately 12.67{\%} with every 1 kJ m–2 day–1 increase in biologically weighted UV-B. As a result, plants grown in the highest UV-B treatment had a total biomass of just 13.7{\%} of controls. Total flavonoids were increased by approximately 76{\%} by all UV-B treatments, while hydroxycinnamic acids increased in proportion to the UV-B dose. Conversely, the digestibility of the aboveground biomass and concentrations of soluble fructans were reduced by UV-B exposure, although soluble sucrose, glucose, and fructose concentrations were unaffected. These results highlight the capacity for UV-B to directly affect forage productivity and chemistry, with negative consequences for digestibility and bioethanol production. Results emphasize the need for future development and distribution of L. perenne varieties to take UV-B irradiance into consideration.",
keywords = "carbohydrate, digestibility, forage quality, growth, phenolics, Ultraviolet-B",
author = "Comont, {David Charles} and Winters, {Ana Louise} and Gomez, {Leonardo D} and McQueen-Mason, {Simon J.} and Dylan Gwynn-Jones",
year = "2013",
month = "5",
doi = "10.1093/jxb/ert077",
language = "English",
volume = "64",
pages = "2193--2204",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",
number = "8",

}

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TY - JOUR

T1 - Latitudinal variation In ambient UV-B radiation is an important determinant of Lolium perenne forage production, quality, and digestibility

AU - Comont, David Charles

AU - Winters, Ana Louise

AU - Gomez, Leonardo D

AU - McQueen-Mason, Simon J.

AU - Gwynn-Jones, Dylan

PY - 2013/5

Y1 - 2013/5

N2 - Few studies to date have considered the responses of agriculturally important forage grasses to UV-B radiation. Yet grasses such as Lolium perenne have a wide current distribution, representing exposure to a significant variation in ambient UV-B. The current study investigated the responses of L. perenne (cv. AberDart) to a simulated latitudinal gradient of UV-B exposure, representing biologically effective UV-B doses at simulated 70, 60, 50, 40, and 30° N latitudes. Aspects of growth, soluble compounds, and digestibility were assessed, and results are discussed in relation to UV-B effects on forage properties and the implications for livestock and bio-ethanol production. Aboveground biomass production was reduced by approximately 12.67% with every 1 kJ m–2 day–1 increase in biologically weighted UV-B. As a result, plants grown in the highest UV-B treatment had a total biomass of just 13.7% of controls. Total flavonoids were increased by approximately 76% by all UV-B treatments, while hydroxycinnamic acids increased in proportion to the UV-B dose. Conversely, the digestibility of the aboveground biomass and concentrations of soluble fructans were reduced by UV-B exposure, although soluble sucrose, glucose, and fructose concentrations were unaffected. These results highlight the capacity for UV-B to directly affect forage productivity and chemistry, with negative consequences for digestibility and bioethanol production. Results emphasize the need for future development and distribution of L. perenne varieties to take UV-B irradiance into consideration.

AB - Few studies to date have considered the responses of agriculturally important forage grasses to UV-B radiation. Yet grasses such as Lolium perenne have a wide current distribution, representing exposure to a significant variation in ambient UV-B. The current study investigated the responses of L. perenne (cv. AberDart) to a simulated latitudinal gradient of UV-B exposure, representing biologically effective UV-B doses at simulated 70, 60, 50, 40, and 30° N latitudes. Aspects of growth, soluble compounds, and digestibility were assessed, and results are discussed in relation to UV-B effects on forage properties and the implications for livestock and bio-ethanol production. Aboveground biomass production was reduced by approximately 12.67% with every 1 kJ m–2 day–1 increase in biologically weighted UV-B. As a result, plants grown in the highest UV-B treatment had a total biomass of just 13.7% of controls. Total flavonoids were increased by approximately 76% by all UV-B treatments, while hydroxycinnamic acids increased in proportion to the UV-B dose. Conversely, the digestibility of the aboveground biomass and concentrations of soluble fructans were reduced by UV-B exposure, although soluble sucrose, glucose, and fructose concentrations were unaffected. These results highlight the capacity for UV-B to directly affect forage productivity and chemistry, with negative consequences for digestibility and bioethanol production. Results emphasize the need for future development and distribution of L. perenne varieties to take UV-B irradiance into consideration.

KW - carbohydrate

KW - digestibility

KW - forage quality

KW - growth

KW - phenolics

KW - Ultraviolet-B

UR - http://hdl.handle.net/2160/9169

U2 - 10.1093/jxb/ert077

DO - 10.1093/jxb/ert077

M3 - Article

VL - 64

SP - 2193

EP - 2204

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

IS - 8

ER -

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