Investigating photosensitisation in livestock resulting from ingestion of the pasture legume Biserrula pelecinus L.

Research output: Other contribution to conferenceAbstract

Abstract

Biserrula pelecinus L. is an annual legume native to the southern Mediterranean. It was first introduced to Australia in 1991 as a potentially valuable rotational pasture species for livestock production. It produces large quantities of biomass, exhibits drought tolerance and is effective for weed suppression in pasture rotations. However, despite proving to be a valuable addition to the pasture toolbox, producers in NSW and WA have reported a limiting factor to uptake: incidence of severe photosensitization when grazing sheep on biserrula pastures. Biserrula photosensitivity, anecdotally, appears to be associated with non-senescent foliage and shows an increased severity of clinical signs in young animals grazing green tissues; however, the pathogenesis of this photosensitization and the metabolite(s) responsible are, as yet, unknown. Studies reported in this project have identified that both commercially available cultivars of biserrula, ‘Casbah’ and ‘Mauro’ can cause outbreaks of primary photosensitization. This work identified that fresh foliar extracts were photosensitizing, and that this activity diminished greatly with drying. Both cultivars were found to be equally bioactive, and photocytotoxic activity was associated with extracts from field-grown biserrula at all stages of plant growth until senescence. Biochemical analysis using fractionated extracts, bioactivity-guided metabolic profiling is described as an experimental approach.
Original languageEnglish
Pages72
Number of pages1
Publication statusPublished - 2018
Event10th International Symposium on Poisonous Plants : ISOPP 10 - Red Lion Conference Center, St George , United States
Duration: 16 Sep 201820 Sep 2018
https://conference.usu.edu/ISOPP/

Conference

Conference10th International Symposium on Poisonous Plants
CountryUnited States
CitySt George
Period16/09/1820/09/18
Internet address

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forage legumes
livestock
pastures
ingestion
extracts
grazing
young animals
metabolomics
cultivars
livestock production
drought tolerance
weed control
pathogenesis
legumes
drying
plant growth
metabolites
uptake mechanisms
sheep
incidence

Cite this

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title = "Investigating photosensitisation in livestock resulting from ingestion of the pasture legume Biserrula pelecinus L.",
abstract = "Biserrula pelecinus L. is an annual legume native to the southern Mediterranean. It was first introduced to Australia in 1991 as a potentially valuable rotational pasture species for livestock production. It produces large quantities of biomass, exhibits drought tolerance and is effective for weed suppression in pasture rotations. However, despite proving to be a valuable addition to the pasture toolbox, producers in NSW and WA have reported a limiting factor to uptake: incidence of severe photosensitization when grazing sheep on biserrula pastures. Biserrula photosensitivity, anecdotally, appears to be associated with non-senescent foliage and shows an increased severity of clinical signs in young animals grazing green tissues; however, the pathogenesis of this photosensitization and the metabolite(s) responsible are, as yet, unknown. Studies reported in this project have identified that both commercially available cultivars of biserrula, ‘Casbah’ and ‘Mauro’ can cause outbreaks of primary photosensitization. This work identified that fresh foliar extracts were photosensitizing, and that this activity diminished greatly with drying. Both cultivars were found to be equally bioactive, and photocytotoxic activity was associated with extracts from field-grown biserrula at all stages of plant growth until senescence. Biochemical analysis using fractionated extracts, bioactivity-guided metabolic profiling is described as an experimental approach.",
keywords = "biserrula, photosensitisation, sheep, Legume",
author = "Jane Quinn and Paul Weston and Saliya Gurusinghe and Russell Barrow and Leslie Weston",
year = "2018",
language = "English",
pages = "72",
note = "10th International Symposium on Poisonous Plants : ISOPP 10 ; Conference date: 16-09-2018 Through 20-09-2018",
url = "https://conference.usu.edu/ISOPP/",

}

Quinn, J, Weston, P, Gurusinghe, S, Barrow, R & Weston, L 2018, 'Investigating photosensitisation in livestock resulting from ingestion of the pasture legume Biserrula pelecinus L.' 10th International Symposium on Poisonous Plants , St George , United States, 16/09/18 - 20/09/18, pp. 72.

Investigating photosensitisation in livestock resulting from ingestion of the pasture legume Biserrula pelecinus L. / Quinn, Jane; Weston, Paul; Gurusinghe, Saliya; Barrow, Russell; Weston, Leslie.

2018. 72 Abstract from 10th International Symposium on Poisonous Plants , St George , United States.

Research output: Other contribution to conferenceAbstract

TY - CONF

T1 - Investigating photosensitisation in livestock resulting from ingestion of the pasture legume Biserrula pelecinus L.

AU - Quinn, Jane

AU - Weston, Paul

AU - Gurusinghe, Saliya

AU - Barrow, Russell

AU - Weston, Leslie

PY - 2018

Y1 - 2018

N2 - Biserrula pelecinus L. is an annual legume native to the southern Mediterranean. It was first introduced to Australia in 1991 as a potentially valuable rotational pasture species for livestock production. It produces large quantities of biomass, exhibits drought tolerance and is effective for weed suppression in pasture rotations. However, despite proving to be a valuable addition to the pasture toolbox, producers in NSW and WA have reported a limiting factor to uptake: incidence of severe photosensitization when grazing sheep on biserrula pastures. Biserrula photosensitivity, anecdotally, appears to be associated with non-senescent foliage and shows an increased severity of clinical signs in young animals grazing green tissues; however, the pathogenesis of this photosensitization and the metabolite(s) responsible are, as yet, unknown. Studies reported in this project have identified that both commercially available cultivars of biserrula, ‘Casbah’ and ‘Mauro’ can cause outbreaks of primary photosensitization. This work identified that fresh foliar extracts were photosensitizing, and that this activity diminished greatly with drying. Both cultivars were found to be equally bioactive, and photocytotoxic activity was associated with extracts from field-grown biserrula at all stages of plant growth until senescence. Biochemical analysis using fractionated extracts, bioactivity-guided metabolic profiling is described as an experimental approach.

AB - Biserrula pelecinus L. is an annual legume native to the southern Mediterranean. It was first introduced to Australia in 1991 as a potentially valuable rotational pasture species for livestock production. It produces large quantities of biomass, exhibits drought tolerance and is effective for weed suppression in pasture rotations. However, despite proving to be a valuable addition to the pasture toolbox, producers in NSW and WA have reported a limiting factor to uptake: incidence of severe photosensitization when grazing sheep on biserrula pastures. Biserrula photosensitivity, anecdotally, appears to be associated with non-senescent foliage and shows an increased severity of clinical signs in young animals grazing green tissues; however, the pathogenesis of this photosensitization and the metabolite(s) responsible are, as yet, unknown. Studies reported in this project have identified that both commercially available cultivars of biserrula, ‘Casbah’ and ‘Mauro’ can cause outbreaks of primary photosensitization. This work identified that fresh foliar extracts were photosensitizing, and that this activity diminished greatly with drying. Both cultivars were found to be equally bioactive, and photocytotoxic activity was associated with extracts from field-grown biserrula at all stages of plant growth until senescence. Biochemical analysis using fractionated extracts, bioactivity-guided metabolic profiling is described as an experimental approach.

KW - biserrula

KW - photosensitisation

KW - sheep

KW - Legume

UR - https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1002&context=poisonousplantresearch

M3 - Abstract

SP - 72

ER -