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Dornelas ASP, Pestana JLT, de Souza Saraiva A, Barbosa RS, Cavallini GS, Gravato C, da Maia Soares AMV, Sarmento RA. The combined effects of microbial insecticides and sodium chloride on the development and emergence of Chironomus xanthus. Pest Manag Sci 2023; 79:2255-2263. [PMID: 36775861 DOI: 10.1002/ps.7407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/27/2023] [Accepted: 02/13/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Freshwater organisms are facing increasing salinity levels, not only due to natural environmental processes, but also human activities, which can cause several physiological adaptations to osmotic stress. Additionally, these organisms might also have to deal with contamination by microbial insecticides. Our main goal was to use Chironomus xanthus to assess the chronic effects of increasing the salinity and commercial formulations of the microbial insecticides based on Bacillus thuringiensis subs. kurstaki (Btk) and Beauveria bassiana (Bb) as active ingredients, respectively. RESULTS A significant interaction of growth was observed between the biopesticide based on Bb and NaCl on the larvae of C. xanthus. Single exposure to NaCl and each one of the formulations demonstrated deleterious impacts not only on larval development, but also on the emergence success and emergence time of this nontarget insect, with potential consequences for freshwater ecosystems due to cascading effects. CONCLUSION The chronic effects induced by both bioinsecticides show that these formulations can have environmental impacts on nontarget freshwater insects. © 2023 Society of Chemical Industry.
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Affiliation(s)
| | - João L T Pestana
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | | | - Rone Silva Barbosa
- Programa de Pós-Graduação em Produção Vegetal, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
| | - Grasiele Soares Cavallini
- Programa de Pós-Graduação em Produção Vegetal, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
| | - Carlos Gravato
- Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal
| | | | - Renato Almeida Sarmento
- Programa de Pós-Graduação em Produção Vegetal, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
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S Barbosa R, Ribeiro F, Dornelas ASP, de Souza Saraiva A, Soares AMVM, Sarmento RA, Gravato C. What does not kill it makes it stronger! The tolerance of the F1 larvae of Chironomus xanthus to a neonicotinoid insecticide formulation. Ecotoxicol Environ Saf 2023; 250:114513. [PMID: 36610296 DOI: 10.1016/j.ecoenv.2023.114513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/17/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Thiamethoxam (TMX) is a systemic neonicotinoid that acts as a partial agonist of the nicotinic acetylcholine receptors (nAChRs). However, target species have shown resistance to formulations based on such neonicotinoids, which can also be expected for non-target insects. This research aimed to study the effects of a formulation based on TMX [Cruiser® 350 FS (CRZ)] on the life traits of Chironomus xanthus filial generation (F1) and compare it with the parental generation (P). Environmentally relevant concentrations of CRZ significantly decreased larvae growth P generation , also slowing and decreasing their emergence. Larvae of the F1 generation were less sensitive than their parents, suggesting that the progeny were able to thrive and perform basic physiological functions better than the parental generation. Our results highlight that insect resistance to neonicotinoids may be associated with the better performance of the filial generation, which is related to the change in affinities of the active ingredient for the sub-units constituting the nAChRs subtypes of F1 organisms, inherited from P organisms that were able to survive and reproduce. Moreover, further studies using biochemical and omics tools should be performed to disentangle the specific changes occurring at the nAChRs throughout insect development.
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Affiliation(s)
- Rone S Barbosa
- Faculdade de Ciências, Universidade de Lisboa, Campo Grande 1749-016, Lisboa, Portugal; Universidade Federal do Tocantins, Campus de Gurupi, Gurupi, Tocantins 77402-970, Brazil
| | - Fabianne Ribeiro
- Universidade Federal do Tocantins, Campus de Gurupi, Gurupi, Tocantins 77402-970, Brazil; CESAM & Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | | | - Althiéris de Souza Saraiva
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Campos Belos, Campos Belos, Goiás 73840-000, Brazil
| | - Amadeu M V M Soares
- CESAM & Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | | | - Carlos Gravato
- Faculdade de Ciências, Universidade de Lisboa, Campo Grande 1749-016, Lisboa, Portugal.
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Dornelas ASP, de Jesus Ferreira JS, Silva LCR, de Souza Saraiva A, Cavallini GS, Gravato CAS, da Maia Soares AMV, Almeida Sarmento R. The sexual reproduction of the nontarget planarian Girardia tigrina is affected by ecologically relevant concentrations of difenoconazole: new sensitive tools in ecotoxicology. Environ Sci Pollut Res Int 2022; 29:27095-27103. [PMID: 34981389 DOI: 10.1007/s11356-021-18423-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
The fungicide difenoconazole, widely used to reduce the negative impacts of fungi diseases on areas with intensive farming, can reach freshwater systems causing deleterious effects on nontarget organisms. The acute and chronic toxicity of a commercial formulation containing 250 g L-1 of difenoconazole (Prisma®) as the active ingredient was assessed in the freshwater planarian Girardia tigrina. The endpoints evaluated were feeding rate, locomotion, regeneration, and sexual reproduction of planarians. The estimated 48 h LC50 of the commercial formulation on planarians expressed as the concentration of the active ingredient difenoconazole was 47.5 mg a.i.L-1. A significant decrease of locomotion (LOEC = 18.56 mg a.i.L-1), delayed regeneration (LOEC = 9.28 mg a.i.L-1), and sexual reproduction impairment, i.e., decreased fecundity and fertility rates (LOEC ≤ 1.16 mg a.i.L-1) were observed on planarians exposed to sublethal concentrations of the formulation. This study demonstrated the importance of using reproductive, physiological, and behavioral parameters as more sensitive and complementary tools to assess the deleterious effects induced by a commercial formulation of difenoconazole on a nontarget freshwater organism. The added value and importance of our research work, namely, the impairment of sexual reproduction of planarians, contributes to the development of useful tools for ecotoxicology and highlights the fact that those tools should be developed as guidelines for testing of chemicals. Our results showed that the use of reproductive parameters of Girardia tigrina would help to complement and achieve a better assessment of the risk posed by triazole fungicides to freshwater ecosystems.
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Affiliation(s)
- Aline Silvestre Pereira Dornelas
- Programa de Pós-Graduação Em Produção Vegetal, Universidade Federal Do Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
| | - Joel Santiago de Jesus Ferreira
- Curso de Engenharia de Bioprocessos E Biotecnologia, Universidade Federal Do Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
| | - Laila Cristina Rezende Silva
- Programa de Pós-Graduação Em Produção Vegetal, Universidade Federal Do Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
| | - Althiéris de Souza Saraiva
- Instituto Federal de Educação, Ciência e Tecnologia Goiano - Campus Campos Belos (Laboratório de Conservação de Agroecossistemas E Ecotoxicologia), Campos Belos, Goiás, 73840-000, Brazil
| | - Grasiele Soares Cavallini
- Programa de Pós-Graduação Em Química, Universidade Federal Do Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
| | | | | | - Renato Almeida Sarmento
- Programa de Pós-Graduação Em Produção Vegetal, Universidade Federal Do Tocantins (UFT), Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
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Silva LCR, Dornelas ASP, de Souza Saraiva A, Gravato C, Pestana JLT, da Maia Soares AMV, Sarmento RA. Do bio-insecticides affect only insect species? Behavior, regeneration, and sexual reproduction of a non-target freshwater planarian. Environ Sci Pollut Res Int 2022; 29:10665-10674. [PMID: 34528200 DOI: 10.1007/s11356-021-16493-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Bio-insecticides have been increasingly used worldwide as ecofriendly alternatives to pesticides, but data on their effects in non-target freshwater organisms is still scarce and limited to insects. The aim of this study was to determine the lethal and sub-lethal effects of the bio-insecticides Bac Control (based on Bacillus thuringiensis kurstaki-Btk) and Boveril (based on Beauveria bassiana-Bb) on regeneration, behavioral, and reproductive endpoints of the freshwater planarian Girardia tigrina. The estimated LC50-48h were > 800 mg a.i./L for Btk and 60.74 mg a.i./L for Bb. In addition, exposure to Btk significantly decreased locomotion and feeding activities of planarians (lowest observed effect concentration (LOEC) of 12.5 mg a.i./L Btk) and fecundity rate (LOEC = 3.12 mg a.i./L Btk), whereas exposure to Bb significantly delayed regeneration (LOEC = 0.75 mg a.i./L Bb) and decreased fecundity rate (1.5 mg a.i./L Bb) of planarians. Thus, both bio-insecticides induced deleterious sub-lethal effects on a non-insect freshwater invertebrate species. However, only Bb-based formulation affected the survival, fecundity rate, and regeneration at concentrations below the maximum predicted environmental concentration (PEC = 247 mg/L). Thus, care should be taken when using such formulations as alternatives to chemical insecticides near aquatic ecosystems.
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Affiliation(s)
- Laila Cristina Rezende Silva
- Programa de Pós-graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
| | - Aline Silvestre Pereira Dornelas
- Programa de Pós-graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
| | - Althiéris de Souza Saraiva
- Instituto Federal de Educação, Ciência e Tecnologia Goiano-Campus Campos Belos (Laboratório de Conservação de Agroecossistemas e Ecotoxicologia), 73840-000, Campos Belos, Goiás, Brazil
| | - Carlos Gravato
- Faculdade de Ciências and CESAM, Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal
| | - João Luís Teixeira Pestana
- Departamento de Biologia and CESAM, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Amadeu Mortágua Velho da Maia Soares
- Programa de Pós-graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil
- Departamento de Biologia and CESAM, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Renato Almeida Sarmento
- Programa de Pós-graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970, Gurupi, Tocantins, Brazil.
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Dornelas ASP, Sarmento RA, Cavallini GS, da Silva Barbosa R, Vieira MM, de Souza Saraiva A, Bordalo MD, Soares AMVM, Pestana JLT. Lethal and sublethal effects of the saline stressor sodium chloride on Chironomus xanthus and Girardia tigrina. Environ Sci Pollut Res Int 2020; 27:34223-34233. [PMID: 32557035 DOI: 10.1007/s11356-020-09556-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Salinization in freshwaters is gradually increasing as a result of human activities and climatic changes. Higher salt content causes stress for freshwater organisms. Sodium chloride (NaCl) is among the most frequently occurring salts in freshwater ecosystems. The objective of the present study was to investigate the lethal and sublethal effects of NaCl on freshwater ecosystems, using as test organism the dipteran Chironomus xanthus and the planarian Girardia tigrina. Acute tests showed that C. xanthus was more sensitive (48-h LC50 (median lethal concentration) of 2.97 g NaCl L-1) than G. tigrina (48-h LC50 of 7.77 g NaCl L-1). C. xanthus larvae growth rate (larvae length and head capsule width) was significantly reduced under exposure to concentrations as low as 0.19 g L-1 NaCl and higher. A delay in the emergence time (EmT50) was also demonstrated for the same concentration. Sublethal NaCl effects in G. tigrina included feeding inhibition (LOEC (lowest observed effect concentration) of 0.4 g L-1), reduced locomotion (LOEC = 0.2 g L-1), and 24-48-h blastema regeneration (LOEC = 0.2 g L-1 and 0.1 g L-1, respectively). The results demonstrated the toxicity of NaCl to C. xanthus and G. tigrina including sublethal effects that can result in negative consequences for populations in natural freshwaters under salinization.
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Affiliation(s)
- Aline Silvestre Pereira Dornelas
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus de Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Renato Almeida Sarmento
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus de Gurupi, Gurupi, TO, 77402-970, Brazil.
| | - Grasiele Soares Cavallini
- Programa de Pós-Graduação em Química, Universidade Federal do Tocantins (UFT), Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Rone da Silva Barbosa
- Curso de Engenharia Florestal, Universidade Federal do Tocantins, 77410-530, Gurupi, Tocantins, Brazil
| | - Mayane Marques Vieira
- Curso de Química Ambiental, Universidade Federal do Tocantins, 77410-530, Gurupi, Tocantins, Brazil
| | - Althiéris de Souza Saraiva
- Departamento de Agropecuaria (Conservacao de Agroecossistemas e Ecotoxicologia), Instituto Federal de Educacao, Ciência e Tecnologia Goiano - Campus Campos Belos, Campos Belos, Goias, 73840-000, Brazil
| | - Maria D Bordalo
- CESAM & Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Amadeu M V M Soares
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus de Gurupi, Gurupi, TO, 77402-970, Brazil
- CESAM & Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - João L T Pestana
- CESAM & Departamento de Biologia, Universidade de Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
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Silvestre Pereira Dornelas A, A Sarmento R, C Rezende Silva L, de Souza Saraiva A, J de Souza D, D Bordalo M, Mvm Soares A, Lt Pestana J. Toxicity of microbial insecticides toward the non-target freshwater insect Chironomus xanthus. Pest Manag Sci 2020; 76:1164-1172. [PMID: 31595634 DOI: 10.1002/ps.5629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 09/13/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Commercial formulations based on Bacillus thuringiensis subs. kurstaki (Btk) and Beauveria bassiana (Bb) are commonly used microbial insecticides in Brazil and other tropical regions. However, and despite being considered environmentally friendly, their use generates concerns regarding possible adverse ecological effects in freshwater ecosystems. Here, we evaluate the effects of these bioinsecticides on the tropical aquatic dipteran Chironomus xanthus under laboratory conditions. RESULTS After laboratory exposures to these compounds 48-h median lethal concentration (LC50 ) values of 1534 μg a.i./L for Btk and of 6.35 μg a.i./L for Bb were estimated. Chronic assays revealed different sublethal effects: Btk-based bioinsecticide exposure reduced C. xanthus growth [lowest observed effect concentration (LOEC) was 126 μg a.i./L for head width], decreased emergence rate (LOEC = 8 μg a.i./L) and increased immunological response (LOEC = 50 μg a.i./L) measured as total hemocyte count in larvae hemolymph. Exposure to low concentrations of Bb-based insecticide also reduced C. xanthus growth (LOEC = 0.07 μg a.i./L for larvae body length measurements), and emergence rate (LOEC = 0.28 μg a.i./L), despite no clear effects on the total hemocyte counts. CONCLUSION Our results suggest that low concentrations of Btk and Bb bioinsecticides are toxic to C. xanthus. Given their widespread use and occurrence in tropical freshwater systems, research is needed to evaluate the potential effects of these compounds concerning natural freshwater insect communities and ecosystem functioning. © 2019 Society of Chemical Industry.
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Affiliation(s)
| | - Renato A Sarmento
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Gurupi, Brazil
| | | | - Althiéris de Souza Saraiva
- Departamento de Agropecuária (Conservação de Agroecossistemas e Ecotoxicologia), Instituto Federal de Educação, Ciência e Tecnologia Goiano - Campus Campos Belos, Campos Belos, Brazil
| | - Danival J de Souza
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Gurupi, Brazil
| | - Maria D Bordalo
- Departamento de Biologia & CESAM, Universidade de Aveiro, Aveiro, Portugal
| | - Amadeu Mvm Soares
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Gurupi, Brazil
- Departamento de Biologia & CESAM, Universidade de Aveiro, Aveiro, Portugal
| | - João Lt Pestana
- Departamento de Biologia & CESAM, Universidade de Aveiro, Aveiro, Portugal
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Córdova López AM, Sarmento RA, de Souza Saraiva A, Pereira RR, Soares AMVM, Pestana JLT. Exposure to Roundup® affects behaviour, head regeneration and reproduction of the freshwater planarian Girardia tigrina. Sci Total Environ 2019; 675:453-461. [PMID: 31030151 DOI: 10.1016/j.scitotenv.2019.04.234] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
The demand of glyphosate-based herbicides including Roundup® is rising in the tropics due to increase occurence of glyphosate-resistant weeds that require higher herbicide application rates but also because of their use associated with genetically engineered, glyphosate-tolerant crops. Consequently, there is now an excessive use of glyphosate in agricultural areas with potential adverse effects also for the surrounding aquatic environments. This study aimed to determine the sensitivity of the freshwater planarian Girardia tigrina to acute and chronic exposures of Roundup®. Planarians were exposed to a range of lethal and sub-lethal concentrations of Roundup® to determine the median lethal concentration (LC50) concerning its active ingredient glyphosate and also effects on locomotor velocity (pLMV), feeding rate, regeneration, reproductive parameters and morphological abnormalities. Regeneration endpoints included length of blastema and time for photoreceptors and auricles regeneration after decapitation, while effects on reproduction were assessed measuring fecundity (number of deposited cocoons) and fertility (number of hatchlings) over five weeks of exposure to glyphosate. The estimated 48 h LC50 of was 35.94 mg glyphosate/L. Dose dependent effects were observed for feeding, locomotion and regeneration endpoints with Lowest observed effect concentration (LOEC) values as low as 3.75 mg glyphosate/L. Chronic exposures to environmentally relevant concentrations of glyphosate significantly impaired fecundity and fertility rates of exposed planarians (median effective concentration, EC50 = 1.6 mg glyphosate/L for fecundity and fertility rates). Our results show deleterious effects of Roundup® on regeneration, behavior and reproduction of freshwater planarians and add important ecotoxicological data towards the environmental risk assessment of glyphosate-based herbicide in freshwater ecosystems.
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Affiliation(s)
- Ana M Córdova López
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970 Gurupi, TO, Brazil; ICEMR Amazonia Laboratory and Emerging Diseases - Iquitos Headquarters, Universidad Peruana Cayetano Heredia, Iquitos, Perú
| | - Renato Almeida Sarmento
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, 77402-970 Gurupi, TO, Brazil
| | - Althiéris de Souza Saraiva
- Departamento de Agropecuária (Conservação de Agroecossistemas e Ecotoxicologia), Instituto Federal de Educação, Ciência e Tecnologia Goiano, campus Campos Belos, 73840-000 Campos Belos, GO, Brazil
| | - Renata Ramos Pereira
- Departamento de Entomologia, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | - Amadeu M V M Soares
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - João L T Pestana
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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Arruda RL, Queiroz PAD, Costa NVD, Saraiva ADS, Erasmo EAL. Avaliação do crescimento inicial de Jatropha curcas L. sob diferentes doses de fósforo aplicados na base. ACTA ACUST UNITED AC 2013. [DOI: 10.20873/jbb.uft.cemaf.v4n4.arruda] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study aimed to analyze the influence of different doses of phosphorus (P2O5) applied at the base on the initial growth of Jatropha curcas L. The experimental randomized blocks design was used with four replications. The treatments consisted of the following doses of phosphorus fertilization: 0, 50, 100, 150 and 200 g plant-1 of P2O5 at 36, 60, 71, 85, 106, 140, 177, 199, 235 and 263 days after seedlings transplanting. Growth parameters evaluated were as follows: plant height, stem diameter, number of primary and secondary branches, number of inflorescences, fruits number, leaf area and seed yield. The P2O5 levels influenced the early growth of the plants. For most of the evaluated characteristics (plant height, number of primary branches, inflorescences, number of fruits), a dose of 150 g plant-1 was the one that promoted greater increase to 140 DAT. Due to the high genetic variability among plants, and the fact that scientists in the field of genetic improvement are working for the development of cultivars with desirable agronomic characteristics, it is necessary to conduct further studies with phosphate fertilizer for the cultivation of Jatropha.
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