Threshold modelling Lolium multiflorum seed germination effects of Neotyphodium endophyte infection and storage environment

Several forage species establish mutualistic associations with vertically-transmitted endophytic fungi that improve their fitness. However, the endophyte may be related to livestock toxicosis and hence ageing seeds has been used to remove the fungus since it loses viability before the seeds. The eff...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Gundel, Pedro Emilio
Otros Autores: Martínez Ghersa, María Alejandra, Ghersa, Claudio Marco
Formato: Artículo
Lenguaje:Inglés
Materias:
FUNGI
LOLIUM
LOLIUM MULTIFLORUM
NEOTYPHODIUM
POACEAE
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2012Gundel4.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
LEADER 05508cab a22008297a 4500
001 AR-BaUFA000340
003 AR-BaUFA
005 20220310121344.0
008 181208t2012 |||||o|||||00||||eng d
999 |c 46774  |d 46774 
022 |a 0251-0952 
040 |a AR-BaUFA  |c AR-BaUFA 
100 1 |9 28667  |a Gundel, Pedro Emilio 
245 0 0 |a Threshold modelling Lolium multiflorum seed germination   |b effects of Neotyphodium endophyte infection and storage environment 
520 |a Several forage species establish mutualistic associations with vertically-transmitted endophytic fungi that improve their fitness. However, the endophyte may be related to livestock toxicosis and hence ageing seeds has been used to remove the fungus since it loses viability before the seeds. The effect of endophyte on seed quality has rarely been studied. We conducted an experiment to study the relationship between the endophyte Neotyphodium occultons and seed germination characteristics in Lolium multiflorum. Infected and non-infected seeds were stored under six different conditions and seed germination rate and viability were monitored over two years. Seed water content was evaluated and the ageing-time model was used to describe the dynamics of seed germination in relation to storage period. The model provided a good description of the seed germination, and parameters appear to work better when seed viability is affected. The endophyte not only affected negatively the seed viability but also the germination rate. Although the endophyte modified the water content, this effect was not associated with the negative effect on viability. Since non-toxic endophytes are being selected to improve forage grasses, further research should incorporate the endophyte viability dynamics in the population-based model to better predict both seed quality decay and endophyte losses. 
653 0 |a FUNGI 
653 0 |a LOLIUM 
653 0 |a LOLIUM MULTIFLORUM 
653 0 |a NEOTYPHODIUM 
653 0 |a POACEAE 
700 1 |9 7113  |a Martínez Ghersa, María Alejandra 
700 1 |9 7549  |a Ghersa, Claudio Marco 
773 |t Seed Science and Technology  |g Vol.40, no.1 (2012), p.51-62 
856 |u http://ri.agro.uba.ar/files/intranet/articulo/2012Gundel4.pdf  |i En reservorio  |q application/pdf  |f 2012Gundel4  |x MIGRADOS2018 
856 |u http://www.seedtest.org/en/home.html  |x MIGRADOS2018  |z LINK AL EDITOR 
900 |a as 
900 |a 20131220 
900 |a N 
900 |a SCOPUS 
900 |a a 
900 |a s 
900 |a ARTICULO 
900 |a EN LINEA 
900 |a 02510952 
900 |a ^tThreshold modelling Lolium multiflorum seed germination^seffects of Neotyphodium endophyte infection and storage environment 
900 |a ^aGundel^bP.E. 
900 |a ^aMartínez-Ghersa^bM.A. 
900 |a ^aGhersa^bC.M. 
900 |a ^aGundel^bP. E. 
900 |a ^aMartínez Ghersa^bM. A. 
900 |a ^aGhersa^bC. M. 
900 |a ^aGundel^bP.E.^tIFEVA-CONICET, Cátedra de Ecología, Universidad de Buenos Aires [UBA], Av. San Martín 4453, [C1417DSE] Buenos Aires, Argentina 
900 |a ^aMartínez-Ghersa^bM.A.^tMTT Agrifood Research Finland, Plant Production Research, Finland 
900 |a ^aGhersa^bC.M. 
900 |a ^tSeed Science and Technology^cSeed Sci. Technol. 
900 |a en 
900 |a 51 
900 |a ^i 
900 |a Vol. 40, no. 1 
900 |a 62 
900 |a FUNGI 
900 |a LOLIUM 
900 |a LOLIUM MULTIFLORUM 
900 |a NEOTYPHODIUM 
900 |a POACEAE 
900 |a Several forage species establish mutualistic associations with vertically-transmitted endophytic fungi that improve their fitness. However, the endophyte may be related to livestock toxicosis and hence ageing seeds has been used to remove the fungus since it loses viability before the seeds. The effect of endophyte on seed quality has rarely been studied. We conducted an experiment to study the relationship between the endophyte Neotyphodium occultons and seed germination characteristics in Lolium multiflorum. Infected and non-infected seeds were stored under six different conditions and seed germination rate and viability were monitored over two years. Seed water content was evaluated and the ageing-time model was used to describe the dynamics of seed germination in relation to storage period. The model provided a good description of the seed germination, and parameters appear to work better when seed viability is affected. The endophyte not only affected negatively the seed viability but also the germination rate. Although the endophyte modified the water content, this effect was not associated with the negative effect on viability. Since non-toxic endophytes are being selected to improve forage grasses, further research should incorporate the endophyte viability dynamics in the population-based model to better predict both seed quality decay and endophyte losses. 
900 |a 40 
900 |a 1 
900 |a 2012 
900 |a ^cH 
900 |a AAG 
900 |a AGROVOC 
900 |a 2012Gundel4 
900 |a AAG 
900 |a http://ri.agro.uba.ar/files/intranet/articulo/2012Gundel4.pdf 
900 |a 2012Gundel4.pdf 
900 |a http://www.seedtest.org/en/home.html 
900 |a http://www.scopus.com/inward/record.url?eid=2-s2.0-84861034926&partnerID=40&md5=66a72585ecf7d0ed11daa10d63020993 
900 |a ^a^b^c^d^e^f^g^h^i 
900 |a OS 
942 0 0 |c ARTICULO  |2 udc 
942 0 0 |c ENLINEA  |2 udc 

Ejemplares similares