Details
| Original language | English |
|---|---|
| Title of host publication | V International Conference Postharvest Unlimited |
| Editors | P.M. Toivonen, P. Kalaitzis, G.A. Manganaris |
| Publisher | International Society for Horticultural Science |
| Pages | 325-330 |
| Number of pages | 6 |
| ISBN (electronic) | 9789462610712 |
| Publication status | Published - 25 Mar 2015 |
Publication series
| Name | Acta Horticulturae |
|---|---|
| Volume | 1079 |
| ISSN (Print) | 0567-7572 |
Abstract
Senescence in plants is a complex, genetically determined cell death program that is characterized by protein breakdown, and disintegration of chloroplasts followed by chlorophyll loss. Cytokinins, including aromatic cytokinins and substituted phenyl urea with powerful cytokinin-like activity, are reported to have anti-senescence activities. Hence, they play an important role in delaying the onset of leaf senescence. We examined the possible use of cytokinins in delaying leaf senescence in Pelargonium × hortorum cuttings cultivar 'Katinka' without adversely retarding rooting. Treated leaves maintained low leaf chroma, high hue values and high chrophyll content because they remained green. Applying aromatic cytokinin to Pelargonium cuttings had no effect on the rooting proportion (%). However, it reduced all other root parameters studied. Our study showed that the investigated cytokinins are very effective in retarding leaf senescence. When taken together with the ease of rooting cuttings, aromatic cytokinin (meta-Topolin) is a suitable alternative to phenyl urea (Thidiazuron) in delaying the onset of leaf yellowing in plants.
Keywords
- Chlorophyll, Meta-Topolin, Pelargonium × hortorum, Rooting, Thidiazuron
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Horticulture
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V International Conference Postharvest Unlimited. ed. / P.M. Toivonen; P. Kalaitzis; G.A. Manganaris. International Society for Horticultural Science, 2015. p. 325-330 (Acta Horticulturae; Vol. 1079).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Cytokinins inhibit leaf senescence in Pelargonium cuttings
AU - Mutui, T. M.
AU - Mibus, H.
AU - Serek, M.
PY - 2015/3/25
Y1 - 2015/3/25
N2 - Senescence in plants is a complex, genetically determined cell death program that is characterized by protein breakdown, and disintegration of chloroplasts followed by chlorophyll loss. Cytokinins, including aromatic cytokinins and substituted phenyl urea with powerful cytokinin-like activity, are reported to have anti-senescence activities. Hence, they play an important role in delaying the onset of leaf senescence. We examined the possible use of cytokinins in delaying leaf senescence in Pelargonium × hortorum cuttings cultivar 'Katinka' without adversely retarding rooting. Treated leaves maintained low leaf chroma, high hue values and high chrophyll content because they remained green. Applying aromatic cytokinin to Pelargonium cuttings had no effect on the rooting proportion (%). However, it reduced all other root parameters studied. Our study showed that the investigated cytokinins are very effective in retarding leaf senescence. When taken together with the ease of rooting cuttings, aromatic cytokinin (meta-Topolin) is a suitable alternative to phenyl urea (Thidiazuron) in delaying the onset of leaf yellowing in plants.
AB - Senescence in plants is a complex, genetically determined cell death program that is characterized by protein breakdown, and disintegration of chloroplasts followed by chlorophyll loss. Cytokinins, including aromatic cytokinins and substituted phenyl urea with powerful cytokinin-like activity, are reported to have anti-senescence activities. Hence, they play an important role in delaying the onset of leaf senescence. We examined the possible use of cytokinins in delaying leaf senescence in Pelargonium × hortorum cuttings cultivar 'Katinka' without adversely retarding rooting. Treated leaves maintained low leaf chroma, high hue values and high chrophyll content because they remained green. Applying aromatic cytokinin to Pelargonium cuttings had no effect on the rooting proportion (%). However, it reduced all other root parameters studied. Our study showed that the investigated cytokinins are very effective in retarding leaf senescence. When taken together with the ease of rooting cuttings, aromatic cytokinin (meta-Topolin) is a suitable alternative to phenyl urea (Thidiazuron) in delaying the onset of leaf yellowing in plants.
KW - Chlorophyll
KW - Meta-Topolin
KW - Pelargonium × hortorum
KW - Rooting
KW - Thidiazuron
UR - http://www.scopus.com/inward/record.url?scp=84930469746&partnerID=8YFLogxK
U2 - 10.17660/ActaHortic.2015.1079.40
DO - 10.17660/ActaHortic.2015.1079.40
M3 - Conference contribution
AN - SCOPUS:84930469746
T3 - Acta Horticulturae
SP - 325
EP - 330
BT - V International Conference Postharvest Unlimited
A2 - Toivonen, P.M.
A2 - Kalaitzis, P.
A2 - Manganaris, G.A.
PB - International Society for Horticultural Science
ER -