scholarly journals Juvenility, Flowering, and the Effects of a Limited Inductive Photoperiod in Coreopsis grandiflora and C. lanceolata

1993 ◽  
Vol 118 (4) ◽  
pp. 513-518 ◽  
Author(s):  
M. Peggy Damann ◽  
Robert E. Lyons
Keyword(s):  
Plant Height ◽  
Stem Elongation ◽  
Significant Loss ◽  
Flower Bud ◽  
Bud Development ◽  
Leaf Stage ◽  
Height Reduction ◽  
Inductive Photoperiod ◽  
Short Days ◽  
Flower Bud Development

Juvenility and flowering requirements of Coreopsis grandiflora Hogg ex Sweet. `Sunray' and C. lanceolata L. `Early Sunrise' were examined by growing plants under short days (SD) and transferring them to long days (LD) upon reaching the designated true leaf stages. Neither cultivar flowered in continuous SD, and `Sunray' remained vegetative in LD. However, LD induced flowering in `Early Sunrise' plants in each leaf count treatment and the loss of juvenility was gradual, with most rapid flowering occurring when plants were transferred to LD at the 16 leaf stage. The limited inductive photoperiod (LIP) inhibited stem elongation of `Early Sunrise' plants in all LD treatments and selectively inhibited axillary flower bud development compared to plants grown in continuous LD. LIP did not affect scape length at first flower even though plant height was significantly diminished if given relatively few LD before transfer to SD. Height reduction was attributed to LIP inhibition of stem elongation with no significant loss of axillary flower bud potential.

scholarly journals The tuberization signal StSP6A represses flower bud development in potato

2018 ◽  
Vol 70 (3) ◽  
pp. 937-948 ◽  
Author(s):  
Faline D M Plantenga ◽  
Sara Bergonzi ◽  
José A Abelenda ◽  
Christian W B Bachem ◽  
Richard G F Visser ◽  
...  
Keyword(s):  
Flower Bud ◽  
Bud Development ◽  
Flower Bud Development

scholarly journals Storage Temperature and Duration Affect Flower Bud Development, Shoot Emergence, and Flowering of Leucocoryne coquimbensis F. Phil.

1998 ◽  
Vol 123 (4) ◽  
pp. 586-591 ◽  
Author(s):  
Kiyoshi Ohkawa ◽  
Hyeon-Hye Kim ◽  
Emiko Nitta ◽  
Yukinori Fukazawa
Keyword(s):  
No Reduction ◽  
Storage Temperature ◽  
Cut Flower ◽  
Flower Bud ◽  
Bud Development ◽  
Dry Storage ◽  
Flower Stem ◽  
Shoot Emergence ◽  
Flower Bud Development

Leucocoryne, a native to Chile, has violet, blue, or white flowers and is increasing in popularity as a cut flower. The effects of storage temperature and duration on flower bud development, shoot emergence, and anthesis were investigated. Bulbs stored at 20 to 30 °C for 22 weeks produced 3.4 flower stems per bulb between March and April. Bulbs stored at 20 °C flowered earliest, followed by those stored at 25 °C. Bulbs stored at 30 °C flowered last. After 16 weeks of storage at 20 °C, a further 2 weeks dry storage at 15 °C before planting resulted in 1 month earlier flowering with no reduction of the number of flowering stems. As dry storage at 20 °C increased to 11 months, the time to emergence and flowering decreased. After dry storage at 20 °C for 12 months, the primary flower stems aborted and secondary stems then developed. Secondary and tertiary flower stems tend to commence flower bud development after the flower bud on the primary flower stem has reached the gynoecium or anther and ovule stage of initiation.

Pollen development in relation to phenological stages of inflorescence expansion in Amelanchier alnifolia (saskatoon), with a comparison with buds forced out of dormancy

1999 ◽  
Vol 77 (2) ◽  
pp. 262-268
Author(s):  
Michael J Sumner ◽  
William R Remphrey ◽  
Richard Martin
Keyword(s):  
Time Frame ◽  
Early Spring ◽  
Flower Buds ◽  
Flower Bud ◽  
Phenological Stages ◽  
Inflorescence Development ◽  
Amelanchier Alnifolia ◽  
Bud Development ◽  
Internal Development ◽  
Flower Bud Development

A relationship was developed between phenological stages of inflorescence expansion and the internal development of pollen within the anther of Amelanchier alnifolia Nutt. flowers. The major microscopic events associated with microsporogenesis and microgametogenesis were correlated with seven stages of external inflorescence development in both natural buds and those forced from dormancy in different concentrations of gibberellin at various times of the year. In fall and early spring, it was found that gibberellin at a concentration of 2.5 mg/L forced buds to produce inflorescences that most resembled those from natural field populations. However, it was not possible to force flower buds to develop all the way to anthesis. Flower bud development stopped when the pollen was at the binucleate stage. Despite this limitation, the ability to force buds increases the time frame for the study of many aspects of the reproductive biology of A. alnifolia.Key words: microsporogenesis, microgametogenesis, gibberellin, GA, flowering.

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