Commercial greenhouse tomato production in Alberta

Calpas, James.; Alberta.,

doi:10.5962/bhl.title.101481

2003

DOI: 10.5962/bhl.title.101481

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Commercial greenhouse tomato production in Alberta

James. Calpas¹,

Alberta. Alberta.²

Abstract: Her Majesty the Queen in Right of Alberta. All rights reserved.No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical photocopying, recording, or otherwise without written permission from the Information Packaging Centre, Alberta Agriculture, Food and Rural Development.

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Relationships among isolates ofBotrytis cinereacollected from greenhouses and field locations in Alberta, based on RAPD analysis

Calpas

Konschuh

Toews

et al. 2006

Canadian Journal of Plant Pathology

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This study was undertaken to determine whether there was genetic diversity among isolates of Botrytis cinerea (teleomorph Botryotinia fuckeliana) collected from greenhouses and field locations in Alberta, Canada, and whether genetic diversity could be attributed to collection location and (or) host plant species. The study was conducted to provide basic information that is intended for use in developing effective greenhouse control strategies for B. cinerea. Ninety-one isolates of B. cinerea were collected from 20 host plant species in 31 greenhouse and field locations across the province. Relationships among subsets of the isolates were assessed, using random amplified polymorphic DNA (RAPD) analysis, and correlated with collection location and host plant. The first subset comprised 38 isolates collected from tomato (Lycopersicon esculentum) in eight greenhouses. The second subset was made up of 50 isolates from 10 host species collected in 10 greenhouses. The third subset consisted of 35 isolates from 17 host species from 23 greenhouses and 8 field locations. Random amplified polymorphic DNA analysis demonstrated distinct groups of B. cinerea within greenhouses in Alberta. Isolates in the three subsets clustered together based on the greenhouse of origin, but not on geographic region or host species. To our knowledge this is the first report of specialization in B. cinerea based on the greenhouse of origin.Résumé : La présente étude a été entreprise afin de déterminer s'il y avait de la diversité génétique parmi les isolats du Botrytis cinerea (téléomorphe Botryotinia fuckeliana) prélevés dans des serres ou des champs de l'Alberta, Canada, et si la diversité génétique était dépendante du site de prélèvement et de l'espèce de plante hôte. Le but de l'étude était de fournir une information de base pour utilisation dans le développement de stratégies efficaces de lutte en serre contre le B. cinerea. Quatre-vingt onze isolats de B. cinerea ont été prélevés sur 20 espèces de plantes hôtes dans 31 sites en serre ou au champ répartis dans la province. L'étude des liens entre les sous-ensembles d'isolats a été faite par analyse de l'ADN polymorphe amplifié au hasard et par comparaison entre les sites de prélèvement et les plantes hôtes. Le premier sous-ensemble comprenait 38 isolats prélevés de tomates (Lycopersicon esculentum) dans huit serres. Le second sous-ensemble était composé de 50 isolats de 10 espèces hôtes prélevés dans 10 serres. Le troisième sousensemble comprenait 35 isolats de 17 espèces hôtes provenant de 23 sites en serres et de 8 en champ. L'analyse de l'ADN polymorphe amplifié au hasard a révélé des groupes distincts de B. cinerea au sein des serres en Alberta. Les isolats des trois sous-ensembles se regroupaient en fonction de leur serre d'origine, mais non en fonction de la région géographique ou de l'espèce hôte. À notre connaissance, c'est la première fois que l'on signale la spécialisation du B. cinerea en fonction de la serre d'origine.

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Relationships among isolates ofBotrytis cinereacollected from greenhouses and field locations in Alberta, based on RAPD analysis

Calpas

Konschuh

Toews

et al. 2006

Canadian Journal of Plant Pathology

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The Effect of Electrical Conductivity on Fruit Growth Pattern in Hydroponically Grown Tomatoes

Watabe

Nakano

Ahn

2022

Crops

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Osmotic stress enhances fruit quality, including the dry matter content, in tomatoes (Solanum lycopersicum L.). This study aimed at providing further insight into the precision control of fruit yield and quality on the long-term moderate osmotic stress conditions in tomato fruit production. We compared the growth pattern between fruits of two cultivars, typical Japanese and Dutch cultivars, under two different nutrient concentrations (2.3 and 5.0 dS·m−1) to understand the effect of electrical conductivity (EC) on dry mass and water content of fruits. The experiment was performed with a rockwool bag culture system in a controlled greenhouse. Increasing EC resulted in an approximately 20% decrease in fruit yield and a 0.5–1% increase in fruit dry matter content in both cultivars. This yield reduction was not caused by the fruit number, but by an approximately 25% decrease in individual fresh fruit weight. Non-linear models were used to describe the changes in dry matter content, water content, and dry weight of tomato fruit as a function of cumulative temperature. The decay rate of dry matter content in the fruit decreased with high EC treatments in the Japanese cultivar. The points at which the rates of changes in water and dry weight increased the in fruit were around 585 and 480 °C-days after anthesis, respectively, under the low EC condition. Rates of water increase in the fruit were changed by high EC treatment, while the shifts were opposite with respect to the cultivars. Dry weight increase in the fruit was not affected by EC treatment. Collectively, our findings clarify the effect of EC on the fruit growth characteristics of Japanese and Dutch tomato cultivars, and provide new insights into the yield of high-Brix tomato cultivation.

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Commercial greenhouse tomato production in Alberta

Cited by 2 publications

References 0 publications

Relationships among isolates ofBotrytis cinereacollected from greenhouses and field locations in Alberta, based on RAPD analysis

Relationships among isolates ofBotrytis cinereacollected from greenhouses and field locations in Alberta, based on RAPD analysis

The Effect of Electrical Conductivity on Fruit Growth Pattern in Hydroponically Grown Tomatoes

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