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Opportunities to breed for broad mite resistance in Rhododendron simsii hybrids

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Abstract
Broad mites, Polyphagotarsonemus latus Banks, are a key pest in many ornamental plants including pot azalea, Rhododendron simsii hybrid. These minute mites (<200 mu m) cause browning and curling of leaves and flowers leading to economic losses as damaged plants are unmarketable. Development of resistant cultivars might lead to a sustainable solution in controlling this pest. We studied the response upon a broad mite infestation in R. simsii by means of gene expression. Data showed the induction of the jasmonic acid defence pathway in response to a broad mite infestation. Furthermore, an oxidative stress response was observed in infested plants when compared to control plants. Scanning electron microscopy of leaf morphology in eight R. simsii cultivars with a known susceptibility for broad mites revealed the presence of different trichome types. Short trichomes with a sticky end were seen in resistant or more tolerant genotypes. The outcome of this study might provide new insights in breeding for resistance against this pest in azalea.
Keywords
jasmonic acid, phytohormone, Polyphagotarsonemus latus, pot azalea, trichome, LATUS BANKS ACARI, POLYPHAGOTARSONEMUS-LATUS, GENE-EXPRESSION, TARSONEMIDAE, SUSCEPTIBILITY, PLANTS

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Chicago
Luypaert, Gil, Johan Van Huylenbroeck, Jan De Riek, Els Mechant, Els Pauwels, and Patrick De Clercq. 2015. “Opportunities to Breed for Broad Mite Resistance in Rhododendron Simsii Hybrids.” In XXV International Eucarpia Symposium, Section Ornamentals: Crossing Borders, ed. J Van Huylenbroeck and E Dhooghe, 1087:479–484. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
Luypaert, Gil, Van Huylenbroeck, J., De Riek, J., Mechant, E., Pauwels, E., & De Clercq, P. (2015). Opportunities to breed for broad mite resistance in Rhododendron simsii hybrids. In J Van Huylenbroeck & E. Dhooghe (Eds.), XXV International Eucarpia symposium, Section Ornamentals: Crossing borders (Vol. 1087, pp. 479–484). Presented at the 25th International EUCARPIA symposium Section on Ornamentals: Crossing borders, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
Luypaert G, Van Huylenbroeck J, De Riek J, Mechant E, Pauwels E, De Clercq P. Opportunities to breed for broad mite resistance in Rhododendron simsii hybrids. In: Van Huylenbroeck J, Dhooghe E, editors. XXV International Eucarpia symposium, Section Ornamentals: Crossing borders. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2015. p. 479–84.
MLA
Luypaert, Gil, Johan Van Huylenbroeck, Jan De Riek, et al. “Opportunities to Breed for Broad Mite Resistance in Rhododendron Simsii Hybrids.” XXV International Eucarpia Symposium, Section Ornamentals: Crossing Borders. Ed. J Van Huylenbroeck & E Dhooghe. Vol. 1087. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2015. 479–484. Print.
@inproceedings{8519690,
  abstract     = {Broad mites, Polyphagotarsonemus latus Banks, are a key pest in many ornamental plants including pot azalea, Rhododendron simsii hybrid. These minute mites ({\textlangle}200 mu m) cause browning and curling of leaves and flowers leading to economic losses as damaged plants are unmarketable. Development of resistant cultivars might lead to a sustainable solution in controlling this pest. We studied the response upon a broad mite infestation in R. simsii by means of gene expression. Data showed the induction of the jasmonic acid defence pathway in response to a broad mite infestation. Furthermore, an oxidative stress response was observed in infested plants when compared to control plants. Scanning electron microscopy of leaf morphology in eight R. simsii cultivars with a known susceptibility for broad mites revealed the presence of different trichome types. Short trichomes with a sticky end were seen in resistant or more tolerant genotypes. The outcome of this study might provide new insights in breeding for resistance against this pest in azalea.},
  author       = {Luypaert, Gil and Van Huylenbroeck, Johan and De Riek, Jan and Mechant, Els and Pauwels, Els and De Clercq, Patrick},
  booktitle    = {XXV International Eucarpia symposium, Section Ornamentals: Crossing borders},
  editor       = {Van Huylenbroeck, J and Dhooghe, E},
  isbn         = {9789462610781},
  issn         = {0567-7572},
  keyword      = {jasmonic acid,phytohormone,Polyphagotarsonemus latus,pot azalea,trichome,LATUS BANKS ACARI,POLYPHAGOTARSONEMUS-LATUS,GENE-EXPRESSION,TARSONEMIDAE,SUSCEPTIBILITY,PLANTS},
  language     = {eng},
  location     = {Melle, Belgium},
  pages        = {479--484},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Opportunities to breed for broad mite resistance in Rhododendron simsii hybrids},
  volume       = {1087},
  year         = {2015},
}

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