Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch
This study was undertaken to evaluate the influence of single foliar flurprimidol treatment on morphology and transpiration of ‘Roman’ and ‘Freedom Red’ poinsettias. The growth retardant flurprimidol (Topflor 015 SL) was applied once as a foliar spray at concentrations of 5, 10 or 15 mg × dm-3 when...
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| Format: | Article |
| Language: | English |
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Polish Botanical Society
2014-09-01
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| Series: | Acta Agrobotanica |
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| Online Access: | https://pbsociety.org.pl/journals/index.php/aa/article/view/3426 |
| _version_ | 1818033929788063744 |
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| author | Anna Pobudkiewicz |
| author_facet | Anna Pobudkiewicz |
| author_sort | Anna Pobudkiewicz |
| collection | DOAJ |
| description | This study was undertaken to evaluate the influence of single foliar flurprimidol treatment on morphology and transpiration of ‘Roman’ and ‘Freedom Red’ poinsettias. The growth retardant flurprimidol (Topflor 015 SL) was applied once as a foliar spray at concentrations of 5, 10 or 15 mg × dm-3 when lateral shoots were about 5 cm in length. Single foliar flurprimidol treatment was sufficient to inhibit stem elongation of both poinsettia cultivars. The degree of growth inhibition depended on cultivar and growth retardant concentration. As compared to the control, the shoots of flurprimidol treated ‘Roman’ and ‘Freedom Red’ plants were up to 44% and 37% shorter, respectively. The desirable plant heights for ‘Roman’ and ‘Freedom Red’ poinsettias were obtained with flurprimidol at concentrations of 5 and 10 mg × dm-3, respectively. The shoots of flurprimidol sprayed poinsettia were also more rigid and aligned relative to each other and thus the bracts on the plant were placed on the same level. The diameters of growth retardant treated poinsettias were up to 13% narrower. The leaf areas, petiole lengths, fresh and dry weights of ‘Roman’ and ‘Freedom Red’ poinsettias treated with flurprimidol were substantially smaller as compared to the control. The bract diameters of both poinsettia cultivars were only slightly affected by growth retardant application. Plants exposed to flurprimidol had also intensified green leaf pigmentation. There was almost no abscission of the oldest leaves in the low portions of growth retardant treated plants, compared to those of the control ones. Flurprimidol had no effect on transpiration rate per unit leaf area and stomatal conductance in both poinsettia cultivars. No phytotoxicity was observed in flurprimidol treated plants. Chemical name used: α-(1-methylethyl)-α-[4-(trifluromethoxy)phenyl]-5-pyrimidinemethanol (flurprimidol). |
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| id | doaj.art-f8c49786f72b4a38a73366e773c7e6fd |
| institution | Directory Open Access Journal |
| issn | 2300-357X |
| language | English |
| last_indexed | 2024-12-10T06:31:05Z |
| publishDate | 2014-09-01 |
| publisher | Polish Botanical Society |
| record_format | Article |
| series | Acta Agrobotanica |
| spelling | doaj.art-f8c49786f72b4a38a73366e773c7e6fd2022-12-22T01:59:04ZengPolish Botanical SocietyActa Agrobotanica2300-357X2014-09-01673657410.5586/aa.2014.0303549Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex KlotzschAnna Pobudkiewicz0Research Institute of Horticulture, Konstytucji 3 Maja 1/3, 96-100 SkierniewiceThis study was undertaken to evaluate the influence of single foliar flurprimidol treatment on morphology and transpiration of ‘Roman’ and ‘Freedom Red’ poinsettias. The growth retardant flurprimidol (Topflor 015 SL) was applied once as a foliar spray at concentrations of 5, 10 or 15 mg × dm-3 when lateral shoots were about 5 cm in length. Single foliar flurprimidol treatment was sufficient to inhibit stem elongation of both poinsettia cultivars. The degree of growth inhibition depended on cultivar and growth retardant concentration. As compared to the control, the shoots of flurprimidol treated ‘Roman’ and ‘Freedom Red’ plants were up to 44% and 37% shorter, respectively. The desirable plant heights for ‘Roman’ and ‘Freedom Red’ poinsettias were obtained with flurprimidol at concentrations of 5 and 10 mg × dm-3, respectively. The shoots of flurprimidol sprayed poinsettia were also more rigid and aligned relative to each other and thus the bracts on the plant were placed on the same level. The diameters of growth retardant treated poinsettias were up to 13% narrower. The leaf areas, petiole lengths, fresh and dry weights of ‘Roman’ and ‘Freedom Red’ poinsettias treated with flurprimidol were substantially smaller as compared to the control. The bract diameters of both poinsettia cultivars were only slightly affected by growth retardant application. Plants exposed to flurprimidol had also intensified green leaf pigmentation. There was almost no abscission of the oldest leaves in the low portions of growth retardant treated plants, compared to those of the control ones. Flurprimidol had no effect on transpiration rate per unit leaf area and stomatal conductance in both poinsettia cultivars. No phytotoxicity was observed in flurprimidol treated plants. Chemical name used: α-(1-methylethyl)-α-[4-(trifluromethoxy)phenyl]-5-pyrimidinemethanol (flurprimidol).https://pbsociety.org.pl/journals/index.php/aa/article/view/3426poinsettiagrowth inhibitionflurprimidolstomatal conductancetranspiration |
| spellingShingle | Anna Pobudkiewicz Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch Acta Agrobotanica poinsettia growth inhibition flurprimidol stomatal conductance transpiration |
| title | Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch |
| title_full | Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch |
| title_fullStr | Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch |
| title_full_unstemmed | Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch |
| title_short | Influence of growth retardant on growth and development of Euphorbia pulcherrima Willd. ex Klotzsch |
| title_sort | influence of growth retardant on growth and development of euphorbia pulcherrima willd ex klotzsch |
| topic | poinsettia growth inhibition flurprimidol stomatal conductance transpiration |
| url | https://pbsociety.org.pl/journals/index.php/aa/article/view/3426 |
| work_keys_str_mv | AT annapobudkiewicz influenceofgrowthretardantongrowthanddevelopmentofeuphorbiapulcherrimawilldexklotzsch |