Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry

Stem canker in blueberries (Vaccinium corymbosum L.) is a disease which is widely distributed around the world and of growing importance in Chile, associated with Neofusicoccum species. The purpose of the present work was to study the effects of water activity (a w) and temperature on mycelial growt...

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Autores principales:	Latorre,Bernardo A, Díaz,Gonzalo A, Reed,María P
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2012
Materias:	Ecological determinants Neofusicoccum arbuti Neofusicoccum australe Neofusicoccum parvum stem canker dieback Vaccinium water potential
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100019
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spelling	oai:scielo:S0718-162020120001000192014-11-05Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberryLatorre,Bernardo ADíaz,Gonzalo AReed,María P Ecological determinants Neofusicoccum arbuti Neofusicoccum australe Neofusicoccum parvum stem canker dieback Vaccinium water potential Stem canker in blueberries (Vaccinium corymbosum L.) is a disease which is widely distributed around the world and of growing importance in Chile, associated with Neofusicoccum species. The purpose of the present work was to study the effects of water activity (a w) and temperature on mycelial growth in vitro of N. arbuti, N. australe and N. parvum, obtained from blueberries with symptoms of stem canker. According to the results obtained, 25 °C was the optimum temperature for mycelial growth of N. arbuti, N. australe and N. parvum. These species presented minimal growth at 35 °C and none at 0 and 5 °C. The effect of a w on mycelial growth was significant (P≤0.001) and varied with the species of Neofusicoccum and the temperature. At 25 °C, the optimum temperature, the three species of Neofusicoccum presented minimum growth with a w of 0.900 and 0.920, while optimum mycelial growth was found with a w equal to 0.990. Independent of the Neofusicoccum species, the effect of temperature (T) and a w on mycelial growth was best explained by y = -721.62 + 0.24T + 788.92a w. (R²adj = 0.77, P<0.001), suggesting that T and a w jointly explained 77% of the total variation on mycelial growth of Neofusicoccum spp. The results obtained provide important information for a better understanding of the biology of these plant pathogenic fungi, and suggest that temperature and a w could be important parameters for understanding factors that affect the inoculum production, colonization and infection by Neofusicoccum spp. in blueberry plantations.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.39 n.1 20122012-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100019en10.4067/S0718-16202012000100019
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ecological determinants Neofusicoccum arbuti Neofusicoccum australe Neofusicoccum parvum stem canker dieback Vaccinium water potential
spellingShingle	Ecological determinants Neofusicoccum arbuti Neofusicoccum australe Neofusicoccum parvum stem canker dieback Vaccinium water potential Latorre,Bernardo A Díaz,Gonzalo A Reed,María P Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
description	Stem canker in blueberries (Vaccinium corymbosum L.) is a disease which is widely distributed around the world and of growing importance in Chile, associated with Neofusicoccum species. The purpose of the present work was to study the effects of water activity (a w) and temperature on mycelial growth in vitro of N. arbuti, N. australe and N. parvum, obtained from blueberries with symptoms of stem canker. According to the results obtained, 25 °C was the optimum temperature for mycelial growth of N. arbuti, N. australe and N. parvum. These species presented minimal growth at 35 °C and none at 0 and 5 °C. The effect of a w on mycelial growth was significant (P≤0.001) and varied with the species of Neofusicoccum and the temperature. At 25 °C, the optimum temperature, the three species of Neofusicoccum presented minimum growth with a w of 0.900 and 0.920, while optimum mycelial growth was found with a w equal to 0.990. Independent of the Neofusicoccum species, the effect of temperature (T) and a w on mycelial growth was best explained by y = -721.62 + 0.24T + 788.92a w. (R²adj = 0.77, P<0.001), suggesting that T and a w jointly explained 77% of the total variation on mycelial growth of Neofusicoccum spp. The results obtained provide important information for a better understanding of the biology of these plant pathogenic fungi, and suggest that temperature and a w could be important parameters for understanding factors that affect the inoculum production, colonization and infection by Neofusicoccum spp. in blueberry plantations.
author	Latorre,Bernardo A Díaz,Gonzalo A Reed,María P
author_facet	Latorre,Bernardo A Díaz,Gonzalo A Reed,María P
author_sort	Latorre,Bernardo A
title	Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
title_short	Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
title_full	Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
title_fullStr	Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
title_full_unstemmed	Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry
title_sort	effect water activity on in vitro mycelial growth of neofusicoccum spp. infecting blueberry
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100019
work_keys_str_mv	AT latorrebernardoa effectwateractivityoninvitromycelialgrowthofneofusicoccumsppinfectingblueberry AT diazgonzaloa effectwateractivityoninvitromycelialgrowthofneofusicoccumsppinfectingblueberry AT reedmariap effectwateractivityoninvitromycelialgrowthofneofusicoccumsppinfectingblueberry
_version_	1714202138752581632

Effect water activity on in vitro mycelial growth of Neofusicoccum spp. infecting blueberry

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