Advanced search
1 file | 912.37 KB

Flower differentiation of azalea depends on genotype and not on the use of plant growth regulators

(2015) PLANT GROWTH REGULATION. 75(1). p.245-252
Author
Organization
Abstract
Flowering is a complex process which starts with the induction and development of the flower buds. For azalea (Rhododendron simsii hybrids), flower induction was hastened by the application of chlormequat and took place within 11 days after treatment. Subsequent flower bud differentiation was not altered by the application rate of the plant growth regulators (PGR) chlormequat and paclobutrazol, nor by temperature or light sum. There were however, large genotypic variations in flower bud differentiation rate. For all cultivars a linear phase until flower primordia were fully differentiated and the style started to enlarge (flower bud stage 7), was followed by a slower final development (to stage 8). The linear phase was fastest for the semi-early flowering cultivars (‘Mont Blanc’, ‘M. Marie’ and ‘Otto’), requiring only 46 or 48 days to reach flower bud stage 7 after the first PGR treatment. Two late flowering cultivars (‘Thesla’ and ‘Sachsenstern’) had the slowest differentiation, requiring 64 days to reach stage 7. The early flowering cultivars (‘H. Vogel’ sports) and two late flowering cultivars (‘Mw. G. Kint’ and ‘Tamira’) required 54 and 52 days, respectively, after the first PGR treatment to reach stage 7. To reach flower bud stage 8, a similar trend in velocity was seen, the semi-early flowering cultivars requiring the least amount of days (17 to 18 days), the late flowering cultivars ‘Thesla’ and ‘Sachsenstern’ requiring the highest amount of days (24) and the early flowering cultivars and the late flowering cultivars ‘Mw. G. Kint’ and ‘Tamira’ requiring an intermediate number of days (20 to 22 days).
Keywords
Flower initiation, Rhododendron simsii hybrids, Paclobutrazol, Chlormequat, Flowering, BUD DEVELOPMENT, GIBBERELLIN BIOSYNTHESIS, FLORAL TRANSITION, GENE-EXPRESSION, RHODODENDRON, TEMPERATURE, INITIATION, CULTIVARS, INDUCTION, PHOTOPERIOD

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 912.37 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Christiaens, Annelies, Els Pauwels, Bruno Gobin, and Marie-Christine Van Labeke. 2015. “Flower Differentiation of Azalea Depends on Genotype and Not on the Use of Plant Growth Regulators.” Plant Growth Regulation 75 (1): 245–252.
APA
Christiaens, A., Pauwels, E., Gobin, B., & Van Labeke, M.-C. (2015). Flower differentiation of azalea depends on genotype and not on the use of plant growth regulators. PLANT GROWTH REGULATION, 75(1), 245–252.
Vancouver
1.
Christiaens A, Pauwels E, Gobin B, Van Labeke M-C. Flower differentiation of azalea depends on genotype and not on the use of plant growth regulators. PLANT GROWTH REGULATION. 2015;75(1):245–52.
MLA
Christiaens, Annelies, Els Pauwels, Bruno Gobin, et al. “Flower Differentiation of Azalea Depends on Genotype and Not on the Use of Plant Growth Regulators.” PLANT GROWTH REGULATION 75.1 (2015): 245–252. Print.
@article{4428748,
  abstract     = {Flowering is a complex process which starts with the induction and development of the flower buds. For azalea (Rhododendron simsii hybrids), flower induction was hastened by the application of chlormequat and took place within 11 days after treatment. Subsequent flower bud differentiation was not altered by the application rate of the plant growth regulators (PGR) chlormequat and paclobutrazol, nor by temperature or light sum. There were however, large genotypic variations in flower bud differentiation rate. For all cultivars a linear phase until flower primordia were fully differentiated and the style started to enlarge (flower bud stage 7), was followed by a slower final development (to stage 8). The linear phase was fastest for the semi-early flowering cultivars (‘Mont Blanc’, ‘M. Marie’ and ‘Otto’), requiring only 46 or 48 days to reach flower bud stage 7 after the first PGR treatment. Two late flowering cultivars (‘Thesla’ and ‘Sachsenstern’) had the slowest differentiation, requiring 64 days to reach stage 7. The early flowering cultivars (‘H. Vogel’ sports) and two late flowering cultivars (‘Mw. G. Kint’ and ‘Tamira’) required 54 and 52 days, respectively, after the first PGR treatment to reach stage 7. To reach flower bud stage 8, a similar trend in velocity was seen, the semi-early flowering cultivars requiring the least amount of days (17 to 18 days), the late flowering cultivars ‘Thesla’ and ‘Sachsenstern’ requiring the highest amount of days (24) and the early flowering cultivars and the late flowering cultivars ‘Mw. G. Kint’ and ‘Tamira’ requiring an intermediate number of days (20 to 22 days).},
  author       = {Christiaens, Annelies and Pauwels, Els and Gobin, Bruno and Van Labeke, Marie-Christine},
  issn         = {0167-6903},
  journal      = {PLANT GROWTH REGULATION},
  keywords     = {Flower initiation,Rhododendron simsii hybrids,Paclobutrazol,Chlormequat,Flowering,BUD DEVELOPMENT,GIBBERELLIN BIOSYNTHESIS,FLORAL TRANSITION,GENE-EXPRESSION,RHODODENDRON,TEMPERATURE,INITIATION,CULTIVARS,INDUCTION,PHOTOPERIOD},
  language     = {eng},
  number       = {1},
  pages        = {245--252},
  title        = {Flower differentiation of azalea depends on genotype and not on the use of plant growth regulators},
  url          = {http://dx.doi.org/10.1007/s10725-014-9948-2},
  volume       = {75},
  year         = {2015},
}

Altmetric
View in Altmetric
Web of Science
Times cited: