Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt
Seminiferous propagation of Dietes bicolor is hindered by the probable physical and/or morphophysiological dormancy. The objective was to analyze the efficacy of different methods of overcoming dormancy in D. bicolor seeds to determine a possible pre-germination treatment for the species. Two experi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Floricultura e Plantas Ornamentais
2021-11-01
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| Series: | Ornamental Horticulture |
| Subjects: | |
| Online Access: | https://www.ornamentalhorticulture.com.br/rbho/article/view/2410 |
| _version_ | 1797831360311721984 |
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| author | Thiago Roberto Rezende Borges Maurecilne Lemes da Silva Givanildo Zildo Silva Diego Ismael Rocha |
| author_facet | Thiago Roberto Rezende Borges Maurecilne Lemes da Silva Givanildo Zildo Silva Diego Ismael Rocha |
| author_sort | Thiago Roberto Rezende Borges |
| collection | DOAJ |
| description | Seminiferous propagation of Dietes bicolor is hindered by the probable physical and/or morphophysiological dormancy. The objective was to analyze the efficacy of different methods of overcoming dormancy in D. bicolor seeds to determine a possible pre-germination treatment for the species. Two experiments were conducted: (I) Evaluation of the breaking of physical dormancy, in which the treatments of mechanical scarification were carried using sandpaper #100; chemical scarification with sulfuric acid (H2SO4) for 5 and 10 minutes and immersion in hot water (70 ºC), also, for 5 and 10 minutes, were evaluated. The intact seed was considered a control. (II) Evaluation of morphophysiological dormancy, in which the seeds were submitted to combined treatments of stratification of hot temperature (20-35 °C) and/or cold temperature (9 ºC), distributed in periods of 0, 1, and 2 weeks, totalizing 9 treatments. In both experiments, germination percentage (G), germination speed index (GSI), and first count (FC) were determined, using a randomized block design, and evaluated by the Scott-Knott test at 1% and Dunnett’s test at 5%. The use of H2SO4 10 minutes induced 42% germination, 0.52 GSI, and 18% FC, but only FC was significantly different from the control. In the second trial, the treatment that spent only two weeks in hot temperatures (20-35 ºC) showed the highest germination (30%), compared to the control (G = 22%). These results provide relevant information for understanding the physiology of D. bicolor germination, in addition to contributing to the optimization of pre-germination practices for this important ornamental species. |
| first_indexed | 2024-04-09T13:51:13Z |
| format | Article |
| id | doaj.art-dfcc4983d2bc4f23809d8adb3c53eaa7 |
| institution | Directory Open Access Journal |
| issn | 2447-536X |
| language | English |
| last_indexed | 2024-04-09T13:51:13Z |
| publishDate | 2021-11-01 |
| publisher | Sociedade Brasileira de Floricultura e Plantas Ornamentais |
| record_format | Article |
| series | Ornamental Horticulture |
| spelling | doaj.art-dfcc4983d2bc4f23809d8adb3c53eaa72023-05-08T17:59:03ZengSociedade Brasileira de Floricultura e Plantas OrnamentaisOrnamental Horticulture2447-536X2021-11-01281Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex KlattThiago Roberto Rezende Borges0Maurecilne Lemes da Silva1Givanildo Zildo Silva2Diego Ismael Rocha3Universidade Federal de JataíUniversidade do Estado de Mato Grosso. Faculdade de Ciências Agrárias, Biológicas e da SaúdeUniversidade Federal de JataíUniversidade Federal de ViçosaSeminiferous propagation of Dietes bicolor is hindered by the probable physical and/or morphophysiological dormancy. The objective was to analyze the efficacy of different methods of overcoming dormancy in D. bicolor seeds to determine a possible pre-germination treatment for the species. Two experiments were conducted: (I) Evaluation of the breaking of physical dormancy, in which the treatments of mechanical scarification were carried using sandpaper #100; chemical scarification with sulfuric acid (H2SO4) for 5 and 10 minutes and immersion in hot water (70 ºC), also, for 5 and 10 minutes, were evaluated. The intact seed was considered a control. (II) Evaluation of morphophysiological dormancy, in which the seeds were submitted to combined treatments of stratification of hot temperature (20-35 °C) and/or cold temperature (9 ºC), distributed in periods of 0, 1, and 2 weeks, totalizing 9 treatments. In both experiments, germination percentage (G), germination speed index (GSI), and first count (FC) were determined, using a randomized block design, and evaluated by the Scott-Knott test at 1% and Dunnett’s test at 5%. The use of H2SO4 10 minutes induced 42% germination, 0.52 GSI, and 18% FC, but only FC was significantly different from the control. In the second trial, the treatment that spent only two weeks in hot temperatures (20-35 ºC) showed the highest germination (30%), compared to the control (G = 22%). These results provide relevant information for understanding the physiology of D. bicolor germination, in addition to contributing to the optimization of pre-germination practices for this important ornamental species. https://www.ornamentalhorticulture.com.br/rbho/article/view/2410butterfly irischemical scarificationIridaceaeornamental monocotseminiferous propagation |
| spellingShingle | Thiago Roberto Rezende Borges Maurecilne Lemes da Silva Givanildo Zildo Silva Diego Ismael Rocha Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt Ornamental Horticulture butterfly iris chemical scarification Iridaceae ornamental monocot seminiferous propagation |
| title | Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt |
| title_full | Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt |
| title_fullStr | Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt |
| title_full_unstemmed | Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt |
| title_short | Overcoming dormancy in seeds of Dietes bicolor (Steud.) Sweet ex Klatt |
| title_sort | overcoming dormancy in seeds of dietes bicolor steud sweet ex klatt |
| topic | butterfly iris chemical scarification Iridaceae ornamental monocot seminiferous propagation |
| url | https://www.ornamentalhorticulture.com.br/rbho/article/view/2410 |
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