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Drought tolerance screening of a Rosa population

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Abstract
Drought stress severely impacts plant production worldwide, and is predicted to increasingly affect crop production due to climate change. One of the main strategies to cope with the changing environment is the development of new cultivars with an improved tolerance to drought stress. A study was initiated to compare mitotically induced tetraploid roses with their diploid counterparts for their drought stress tolerance. The first step in this research is the development of a screening method to evaluate segregation for drought tolerance in a diploid rose population. Therefore, drought tolerance was screened in 69 genotypes selected from the F1 population resulting from a R. 'Yesterday' x R. wichurana hybridisation. The plants were subjected to two different irrigation regimes, reducing the amount of water received by the drought stress group to less than 10% of an optimal amount given in the control group. Relative water content (RWC), leaf water potential (Psi) and effective photochemical quantum yield of photosystem II (Y(II)) were measured, next to stomatal size and density, and leaf morphological characteristics. RWC and Psi were good indicators for screening drought sensitivity of the genotypes. However, Y(II) did not prove to be a reliable screening method in this study. This approach allowed the selection of interesting rose genotypes for further characterisation and tetraploidisation, potentially forming the basis of future drought tolerant rose cultivars.
Keywords
relative water content, chlorophyll, fluorescence, water stress, rose, leaf water potential, stomatal density, LEAF SIZE, GROWTH, PLANTS, CHLOROPHYLL FLUORESCENCE, CEREALS, STRESS, LEAVES, LEVEL

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Citation

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Chicago
De Dauw, Katrien, Marie-Christine Van Labeke, Leen Leus, and Johan Van Huylenbroeck. 2013. “Drought Tolerance Screening of a Rosa Population.” In Acta Horticulturae, ed. Johan Van Huylenbroeck, Marie-Christine Van Labeke, and Katrijn Van Laere, 990:121–127. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
De Dauw, K., Van Labeke, M.-C., Leus, L., & Van Huylenbroeck, J. (2013). Drought tolerance screening of a Rosa population. In Johan Van Huylenbroeck, M.-C. Van Labeke, & K. Van Laere (Eds.), Acta Horticulturae (Vol. 990, pp. 121–127). Presented at the 2nd International symposium on Woody Ornamentals of the Temperate Zone, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
De Dauw K, Van Labeke M-C, Leus L, Van Huylenbroeck J. Drought tolerance screening of a Rosa population. In: Van Huylenbroeck J, Van Labeke M-C, Van Laere K, editors. Acta Horticulturae. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2013. p. 121–7.
MLA
De Dauw, Katrien, Marie-Christine Van Labeke, Leen Leus, et al. “Drought Tolerance Screening of a Rosa Population.” Acta Horticulturae. Ed. Johan Van Huylenbroeck, Marie-Christine Van Labeke, & Katrijn Van Laere. Vol. 990. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2013. 121–127. Print.
@inproceedings{4185067,
  abstract     = {Drought stress severely impacts plant production worldwide, and is predicted to increasingly affect crop production due to climate change. One of the main strategies to cope with the changing environment is the development of new cultivars with an improved tolerance to drought stress. A study was initiated to compare mitotically induced tetraploid roses with their diploid counterparts for their drought stress tolerance. The first step in this research is the development of a screening method to evaluate segregation for drought tolerance in a diploid rose population. Therefore, drought tolerance was screened in 69 genotypes selected from the F1 population resulting from a R. 'Yesterday' x R. wichurana hybridisation. The plants were subjected to two different irrigation regimes, reducing the amount of water received by the drought stress group to less than 10% of an optimal amount given in the control group. Relative water content (RWC), leaf water potential (Psi) and effective photochemical quantum yield of photosystem II (Y(II)) were measured, next to stomatal size and density, and leaf morphological characteristics. RWC and Psi were good indicators for screening drought sensitivity of the genotypes. However, Y(II) did not prove to be a reliable screening method in this study. This approach allowed the selection of interesting rose genotypes for further characterisation and tetraploidisation, potentially forming the basis of future drought tolerant rose cultivars.},
  author       = {De Dauw, Katrien and Van Labeke, Marie-Christine and Leus, Leen and Van Huylenbroeck, Johan},
  booktitle    = {Acta Horticulturae},
  editor       = {Van Huylenbroeck, Johan and Van Labeke, Marie-Christine and Van Laere, Katrijn},
  isbn         = {9789066054776},
  issn         = {0567-7572},
  keywords     = {relative water content,chlorophyll,fluorescence,water stress,rose,leaf water potential,stomatal density,LEAF SIZE,GROWTH,PLANTS,CHLOROPHYLL FLUORESCENCE,CEREALS,STRESS,LEAVES,LEVEL},
  language     = {eng},
  location     = {Ghent, Belgium},
  pages        = {121--127},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Drought tolerance screening of a Rosa population},
  url          = {http://www.actahort.org/books/990/990_12.htm},
  volume       = {990},
  year         = {2013},
}

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