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Dual effect of light on flowering and sprouting of rose shoots
Year:
1984
Source of publication :
Physiologia Plantarum
Authors :
Mor, Yoram
;
.
Volume :
61
Co-Authors:
Mor, Y., Dept of Ornamental Horticulture, Hebrew Univ. of Jerusalem, Rehovot, 76-100, Israel
Halevy, A.H., Dept of Ornamental Horticulture, Hebrew Univ. of Jerusalem, Rehovot, 76-100, Israel
Facilitators :
From page:
119
To page:
124
(
Total pages:
6
)
Abstract:
Shade, caused by a dense leaf canopy in the light conditions of a normal greenhouse, reduced sprouting of the third axillary bud (from the top) on decapitated rose branches (Rosa hybrida cv. Marimba) in comparison to less shaded buds on branches protruding above the canopy and sparsely spaced. Flowering of the third young shoot on shaded branches bearing 3 lateral shoots was totally inhibited. Mixed fluorescent and incandescent light in a growth chamber reduced sprouting of the third bud on decapitated rose branches in comparison to decapitated branches on rose plants held in fluorescent light of similar photon flux density. This was attributed to the higher R:FR ratio in fluorescent vs mixed light that reached the third bud, and in exposed vs shaded branches. Flowering of the third shoot was promoted by several factors: high photon flux density, 0.5 mM gibberellic acid (GA) or 0.2 mM benzyladenine (BA). BA was the most effective treatment. Treatments promoting flowering of the third shoot did not reduce growth or flowering of the upper shoots. However, spraying the uppermost shoot with BA suppressed the growth of the shoots below. It is concluded that light affects flowering in two ways. The effect on bud sprouting is related mainly to R:FR ratios, while the effect on flower development is related mainly to photon flux density. Cytokinins may substitute for the light effect on flower development. Copyright © 1984, Wiley Blackwell. All rights reserved
Note:
Related Files :
Apical dominance
Benzyladenine
gibberellic acid
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Related Content
More details
DOI :
10.1111/j.1399-3054.1984.tb06110.x
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
32699
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:11
Scientific Publication
Dual effect of light on flowering and sprouting of rose shoots
61
Mor, Y., Dept of Ornamental Horticulture, Hebrew Univ. of Jerusalem, Rehovot, 76-100, Israel
Halevy, A.H., Dept of Ornamental Horticulture, Hebrew Univ. of Jerusalem, Rehovot, 76-100, Israel
Dual effect of light on flowering and sprouting of rose shoots
Shade, caused by a dense leaf canopy in the light conditions of a normal greenhouse, reduced sprouting of the third axillary bud (from the top) on decapitated rose branches (Rosa hybrida cv. Marimba) in comparison to less shaded buds on branches protruding above the canopy and sparsely spaced. Flowering of the third young shoot on shaded branches bearing 3 lateral shoots was totally inhibited. Mixed fluorescent and incandescent light in a growth chamber reduced sprouting of the third bud on decapitated rose branches in comparison to decapitated branches on rose plants held in fluorescent light of similar photon flux density. This was attributed to the higher R:FR ratio in fluorescent vs mixed light that reached the third bud, and in exposed vs shaded branches. Flowering of the third shoot was promoted by several factors: high photon flux density, 0.5 mM gibberellic acid (GA) or 0.2 mM benzyladenine (BA). BA was the most effective treatment. Treatments promoting flowering of the third shoot did not reduce growth or flowering of the upper shoots. However, spraying the uppermost shoot with BA suppressed the growth of the shoots below. It is concluded that light affects flowering in two ways. The effect on bud sprouting is related mainly to R:FR ratios, while the effect on flower development is related mainly to photon flux density. Cytokinins may substitute for the light effect on flower development. Copyright © 1984, Wiley Blackwell. All rights reserved
Scientific Publication
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