Influence of gibberellin biosynthesis inhibitors on stem elongation and floral initiation on in vitro chicory root explants under dark and light conditions

1995 ◽  
Vol 17 (1) ◽  
pp. 47-52 ◽  
Author(s):  
M. A. C. Demeulemeester ◽  
W. Rademacher ◽  
A. Van de Mierop ◽  
M. P. De Proft
Keyword(s):  
Stem Elongation ◽  
Gibberellin Biosynthesis ◽  
Floral Initiation ◽  
Light Conditions ◽  
Root Explants ◽  
Chicory Root ◽  
Biosynthesis Inhibitors

Stem elongation and floral initiation on in vitro chicory root explants: influence of photoperiod

1995 ◽  
Vol 16 (3) ◽  
pp. 233-238 ◽  
Author(s):  
M. A. C. Demeulemeester ◽  
A. Voet ◽  
Van de Mierop ◽  
M. P. de Proft
Keyword(s):  
Stem Elongation ◽  
Floral Initiation ◽  
Root Explants ◽  
Chicory Root

Induction of stem elongation on in vitro chicory root explants under unfavourable photoperiodic conditions by gibberellin A3

1995 ◽  
Vol 16 (3) ◽  
pp. 239-241 ◽  
Author(s):  
M. A. C. Demeulemeester ◽  
A. Voet ◽  
M. P. De Proft
Keyword(s):  
Stem Elongation ◽  
Root Explants ◽  
Gibberellin A3 ◽  
Chicory Root

Use of Chicory Root Explants In Vitro as a Model for the Induction of Different Stem Types

2000 ◽  
Vol 156 (3) ◽  
pp. 413-418 ◽  
Author(s):  
M.A.C. Demeulemeester ◽  
M.P. De Proft
Keyword(s):  
Root Explants ◽  
Chicory Root

A phytochrome-mediated alteration from stem to rosette growth on chicory root explants in vitro

1996 ◽  
Vol 18 (3) ◽  
pp. 207-212 ◽  
Author(s):  
M. A. C. Demeulemeester ◽  
H. Asard ◽  
M. P. De Proft
Keyword(s):  
Root Explants ◽  
Chicory Root

scholarly journals Role of Gibberellin A4 and Gibberellin Biosynthesis Inhibitors on Flowering and Stem Elongation in Petunia under Modified Light Environments

HortScience ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 134-137 ◽  
Author(s):  
T.A. Cerny-Koenig ◽  
J.E. Faust ◽  
N.C. Rajapakse
Keyword(s):  
Stem Elongation ◽  
Dry Weight ◽  
Gibberellin Biosynthesis ◽  
Shoot Dry Weight ◽  
Long Day ◽  
Air Temperatures ◽  
Biosynthesis Inhibitors ◽  
Growing Environment ◽  
Ga Biosynthesis

In our previous experiments, greenhouse films that selectively remove far-red (FR) light from the growing environment reduced the stem elongation but delayed anthesis of long day plants. In the present research we investigated if the application of gibberellin A4 and gibberellin (GA) biosynthesis inhibitors could overcome the delay in anthesis of petunia (Petunia ×hybrida Vilm.-Andr.), a quantitative long-day plant, under a FR light deficient environment. The GA biosynthesis inhibitors prohexadione-Ca and exo-C-16,17-dihydro GA5 (GA5) were used because of their ability to prevent catabolism of active GAs. Anthesis and stem elongation were investigated under control, red (R; 600 to 700 nm) and FR (700 to 800 nm) light-absorbing (AR and AFR) films. The R:FR ratios of control, AR, and AFR films were 1.03, 0.71, and 1.51, respectively. Air temperatures among treatment chambers were not different. AR film did not affect anthesis or stem elongation, but AFR film reduced stem elongation and delayed anthesis by 12 days. Exogenous application of GA5 had no effect on stem elongation, shoot dry weight or days to anthesis at any concentration (0 to 100 mg·L-1) tested under control, AR, or AFR films. Anthesis was delayed with increasing concentration (0 to 200 mg·L-1) of prohexadione-Ca under all treatments. Prohexadione-Ca at 200 mg·L-1 delayed anthesis by 11 and 7 days under the control and AFR film, respectively, suggesting an interaction between light quality and prohexadione-Ca treatment. Exogenous GA4 accelerated anthesis under both films but the promotion was greater under the AFR films. However, GA4 treatment increased stem elongation and the increase in stem elongation was greater under the AFR film. Addition of GA5 to GA4 had no added effect on flowering and failed to reduce stem elongation. Therefore, GA or GA inhibitors are not suitable for flower promotion under AFR films.

scholarly journals Effects of Gibberellins and Gibberellin-biosynthesis Inhibitors on Stem Elongation and Flowering of Raphanus sativus L.

1998 ◽  
Vol 67 (3) ◽  
pp. 325-330 ◽  
Author(s):  
Takaaki Nishijima ◽  
Naoki Katsura ◽  
Masaji Koshioka ◽  
Hiroko Yamazaki ◽  
Masayoshi Nakayama ◽  
...  
Keyword(s):  
Raphanus Sativus ◽  
Stem Elongation ◽  
Gibberellin Biosynthesis ◽  
Biosynthesis Inhibitors ◽  
Raphanus Sativus L

Inhibition of flower induction on in vitro chicory root explants by hydroponic forcing pretreatment of roots

1995 ◽  
Vol 17 (3) ◽  
pp. 199-203 ◽  
Author(s):  
M. A. C. Demeulemeester ◽  
H. Vangossum ◽  
M. P. De Proft
Keyword(s):  
Flower Induction ◽  
Root Explants ◽  
Chicory Root
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