Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs)
Biological invasions of exotic plants can seriously contribute to ecological imbalances within areas to which they have been introduced, affecting, in addition to native plants, cultivated species. Consequently, the objective of the current study was to evaluate effects of allelopathic extracts of t...
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Universidade Federal de Roraima
2017-12-01
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| Series: | Agro@mbiente On-line |
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| Online Access: | https://revista.ufrr.br/agroambiente/article/view/4329 |
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| author | Silvana Fraga Silva Halina Stéffany Lopes Costa Jesimiel Silva Viana Sebastião Medeiros Filho |
| author_facet | Silvana Fraga Silva Halina Stéffany Lopes Costa Jesimiel Silva Viana Sebastião Medeiros Filho |
| author_sort | Silvana Fraga Silva |
| collection | DOAJ |
| description | Biological invasions of exotic plants can seriously contribute to ecological imbalances within areas to which they have been introduced, affecting, in addition to native plants, cultivated species. Consequently, the objective of the current study was to evaluate effects of allelopathic extracts of three exotic species on
the physiological quality of crambe seeds. Aqueous extracts of Prosopis juliflora (Sw.) DC (algaroba) were formulated; Azadirachta indica A. Juss (Nim) and Cryptostegia madagascariensis Bojer ex Decne (viuvinha) at 20% (200 g of dried leaves per liter of distilled water) placed in B.O.D at 25 ° C for 24 h. Petri dishes, lined with germitest paper sheets, were moistened with aqueous extracts at 2,5 times de paper weight.
In the experimental trial, we used the completely randomized, with four treatments (three extracts + control treatment) and four replicates of 25 seeds. The first and second germination counts were evaluated in the fourth and tenth days respectively; germination rate index (GRI), allelopathic effect index (AEI), seedling length and dry mass. P. juliflora and C. madagascariensis reduced germination by 84 and 91%, respectively, in the first count. The GRI was affected by the three species, while the AEI showed greater allelopathy for C. madagascariensis, reaching -0.90. Seedlings lengths were reduced in the presence of P. juliflora and C. madagascariensis. For crambe seeds, all extracts negatively affected their physiological potential. |
| format | Article |
| id | doaj-art-6a4b4e5995a448f086d02a004695e9c4 |
| institution | Kabale University |
| issn | 1982-8470 |
| language | English |
| publishDate | 2017-12-01 |
| publisher | Universidade Federal de Roraima |
| record_format | Article |
| series | Agro@mbiente On-line |
| spelling | doaj-art-6a4b4e5995a448f086d02a004695e9c42025-02-04T15:01:18ZengUniversidade Federal de RoraimaAgro@mbiente On-line1982-84702017-12-01121Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs)Silvana Fraga Silva0Halina Stéffany Lopes Costa1Jesimiel Silva Viana2Sebastião Medeiros Filho3Universidade Federal do Ceará - UFCUniversidade Federal do CearáUniversidade Federal do CearáUniversidade Federal do CearáBiological invasions of exotic plants can seriously contribute to ecological imbalances within areas to which they have been introduced, affecting, in addition to native plants, cultivated species. Consequently, the objective of the current study was to evaluate effects of allelopathic extracts of three exotic species on the physiological quality of crambe seeds. Aqueous extracts of Prosopis juliflora (Sw.) DC (algaroba) were formulated; Azadirachta indica A. Juss (Nim) and Cryptostegia madagascariensis Bojer ex Decne (viuvinha) at 20% (200 g of dried leaves per liter of distilled water) placed in B.O.D at 25 ° C for 24 h. Petri dishes, lined with germitest paper sheets, were moistened with aqueous extracts at 2,5 times de paper weight. In the experimental trial, we used the completely randomized, with four treatments (three extracts + control treatment) and four replicates of 25 seeds. The first and second germination counts were evaluated in the fourth and tenth days respectively; germination rate index (GRI), allelopathic effect index (AEI), seedling length and dry mass. P. juliflora and C. madagascariensis reduced germination by 84 and 91%, respectively, in the first count. The GRI was affected by the three species, while the AEI showed greater allelopathy for C. madagascariensis, reaching -0.90. Seedlings lengths were reduced in the presence of P. juliflora and C. madagascariensis. For crambe seeds, all extracts negatively affected their physiological potential.https://revista.ufrr.br/agroambiente/article/view/4329Biological invasion. Germination. Secondary compounds. |
| spellingShingle | Silvana Fraga Silva Halina Stéffany Lopes Costa Jesimiel Silva Viana Sebastião Medeiros Filho Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) Agro@mbiente On-line Biological invasion. Germination. Secondary compounds. |
| title | Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) |
| title_full | Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) |
| title_fullStr | Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) |
| title_full_unstemmed | Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) |
| title_short | Phytotoxicity of exotic species on the physiological potential of crambe seeds (Crambe abyssinica Hochs) |
| title_sort | phytotoxicity of exotic species on the physiological potential of crambe seeds crambe abyssinica hochs |
| topic | Biological invasion. Germination. Secondary compounds. |
| url | https://revista.ufrr.br/agroambiente/article/view/4329 |
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