Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach

Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach

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29 p.

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Bibliographic Details
Main Author: Gutierrez Y., Daniela
Other Authors: Sierra, Alejandra
Format: Tesis biblioteca
Language:spa
Published: Zamorano: Escuela Agrícola Panamericana, 2020 2020
Subjects:Lactuca sativa, Root rot, Spinacia oleracea, Zoospores,
Online Access:http://hdl.handle.net/11036/6884
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spelling oai:null:11036-68842022-09-26T12:01:25Z Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach Gutierrez Y., Daniela Sierra, Alejandra Miller, Sally Lactuca sativa Root rot Spinacia oleracea Zoospores 29 p. Pythium species are pathogens that cause root rot in hydroponic crops. The objectives of this study were to determine the optimal growth temperature of P. aphanidermatum and P. oopapillum, their pathogenicity in spinach and lettuce, and a suitable method for spinach inoculation. The mycelial growth rate of P. aphanidermatum, P. oopapillum 06 and P. oopapillum 07 was determined at 15-20-25-30-35 and 40 °C measuring radial growth every 12 hours for 48 hours. Pathogenicity of these isolates was evaluated in a simulated deep-water culture hydroponic system. Lettuce and spinach inoculations were performed using mycelial infected agar discs and a concentration of 10 zoospores mL-1 was evaluated for spinach. Data collected, at 14 days for lettuce and 16 days for spinach, were root length, fresh and dry root weight, and fresh leaf weight. For spinach, root rot severity was also measured. P. aphanidermatum had the highest growth rate at 25-30 °C and P. oopapillum isolates at 30-35 °C. Inoculated lettuces showed a decrease in all measured variables compared to control. Inoculated spinach had lower fresh leaf, root weight and greater root rot severity than controls. P. aphanidermatum presented the greatest decrease in root length, fresh weight of root and leaves and the highest root rot severity (97.5%) when inoculated with zoospores. Inoculation method with the greatest effect in root length, weight and leaf weight were zoospores. P. aphanidermatum and P. oopapillum affected root development resulting in less plant growth. The use of zoospores is a suitable method of inoculation. 2020-11-30T16:29:24Z 2020-11-30T16:29:24Z 2020 Tesis http://hdl.handle.net/11036/6884 spa Copyright, Escuela Agrícola Panamericana, 2020 openAccess http://creativecommons.org/licenses/by-nc-nd/3.0/es application/pdf Zamorano Zamorano: Escuela Agrícola Panamericana, 2020
institution Zamorano HN
collection DSpace
country Honduras
countrycode HN
component Bibliográfico
access En linea
databasecode dig-zamorano
tag biblioteca
region America Central
libraryname Biblioteca Wilson Popenoe
language spa
topic Lactuca sativa
Root rot
Spinacia oleracea
Zoospores
Lactuca sativa
Root rot
Spinacia oleracea
Zoospores
spellingShingle Lactuca sativa
Root rot
Spinacia oleracea
Zoospores
Lactuca sativa
Root rot
Spinacia oleracea
Zoospores
Gutierrez Y., Daniela
Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
description 29 p.
author2 Sierra, Alejandra
author_facet Sierra, Alejandra
Gutierrez Y., Daniela
format Tesis
topic_facet Lactuca sativa
Root rot
Spinacia oleracea
Zoospores
author Gutierrez Y., Daniela
author_sort Gutierrez Y., Daniela
title Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
title_short Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
title_full Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
title_fullStr Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
title_full_unstemmed Pathogenicity of Pythium aphanidermatum and P. oopapillum in hydroponic lettuce and spinach
title_sort pathogenicity of pythium aphanidermatum and p. oopapillum in hydroponic lettuce and spinach
publisher Zamorano: Escuela Agrícola Panamericana, 2020
publishDate 2020
url http://hdl.handle.net/11036/6884
work_keys_str_mv AT gutierrezydaniela pathogenicityofpythiumaphanidermatumandpoopapilluminhydroponiclettuceandspinach
_version_ 1756081282846031872

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