Floral biology and characterization of seed germination in physic nut (Jatropha curcas L.)

Brasileiro, Beatriz Gonçalves; Dias, Denise Cunha Fernandes dos Santos; Dias, Luíz Antônio dos Santos

doi:10.1590/s0101-31222012000400005

Cited by 14 publications

(12 citation statements)

References 16 publications

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Section: Morfofisiologiaunclassified

“…As folhas têm de 10 a 15 cm de comprimento e 7,5 a 12,5 cm de largura, são verdes, esparsas e brilhantes, largas e alternas, em forma de palma, com três a cinco lóbulos, pecioladas e com nervuras esbranquiçadas e salientes na face inferior. Os pecíolos são redondos, lisos, com 4 a 6 centímetros de comprimento e estípulas ausentes (HELLER, 1996;SATURNINO et al, 2005;SATO et al, 2009;BRASILEIRO et al, 2012;MARGONAR et al, 2012;PESSOA et al, 2012; SANTANA et al, 2013; CAB INTERNATIONAL, 2013;LUCENA et al, 2014).A espécie é monóica, sendo as flores masculinas de coloração amarelada, em maior número, localizadas nas extremidades das ramificações, e as femininas, logo abaixo das masculinas (Figura 1B). Apresenta polinização cruzada, primordialmente entomófila, entre diferentes flores da mesma planta ou de plantas diferentes, sendo parcialmente information that could support the production and commercial exploitation of J. curcas.…”

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Revisão: Jatropha curcas L.: aspectos morfofisiológicos e químicos

Virgens

Castro

Loureiro

et al. 2017

Braz. J. Food Technol.

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. Revisão: Jatropha curcas L.: aspectos morfofisiológicos e químicos Review: Jatropha curcas L.: morphophysiological and chemical aspectsResumo Jatropha curcas L. (pinhão-manso) é uma espécie vegetal oleaginosa cujo óleo, extraído de suas sementes, apresenta múltiplas aplicações para comunidades locais, além da sua potencial aplicação em diferentes setores industriais, dentre os quais a indústria de biodiesel, constituindo-se, assim, em mais uma fonte de matéria-prima dentro do elenco de espécies oleaginosas úteis. Aspectos morfofisiológicos e físico-químicos são de grande importância quando se tem interesse na prospecção de espécies vegetais visando sua domesticação e exploração comercial. O objetivo deste estudo foi realizar uma revisão do estado da arte sobre a J. curcas, compilando estudos acerca da caracterização morfofisiológica, assim como acerca da composição química das sementes, gerando assim informações que auxiliem na exploração do potencial de produção e cultivo da espécie, a fim de subsidiar estudos que propiciem a exploração comercial sustentável dessa cultura. O conhecimento morfológico disponível sobre J. curcas possibilita o entendimento preciso do ciclo biológico da planta, entretanto, estudos fisiológicos ainda necessitam ser desenvolvidos para uma melhor compreensão do comportamento dela, principalmente em termos de armazenamento, condições ótimas de germinação e formação de mudas, assim como sobre o comportamento da espécie quando sob condições adversas, tais como excessiva insolação, restrição hídrica e temperaturas elevadas, dentre outras. A descrição da composição química, caracterização de compostos tóxicos e fatores antinutricionais da semente já existentes forneceram informações que podem dar suporte a produção e exploração comercial de J. curcas, porém estudos e testes com animais devem ser conduzidos para confirmar com maior segurança suas aplicações comerciais. Palavras SummaryJatropha curcas L. (physic nut) is an oleaginous plant species and the oil extracted from its seeds presents multiple applications for use by local communities, in addition to its potential application in different industrial sectors, amongst which the biodiesel industry, thus constituting one more source of raw materials within the inventory of useful oleaginous species. The morphophysiological and physicochemical aspects are of great importance when there is interest in the prospection of plant species aiming at their domestication and commercial exploitation. The aim of this study was to carry out a review of the state of art concerning J. curcas by compiling studies on its morphophysiological characterization and on the chemical composition of its seeds, thus generating information that could help in the exploitation of the production and cultivation potential of this species,...

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Section: Morfofisiologiaunclassified

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Revisão: Jatropha curcas L.: aspectos morfofisiológicos e químicos

Virgens

Castro

Loureiro

et al. 2017

Braz. J. Food Technol.

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“…Various spacings are usually adopted, from high adensed density (2×2 m) to low density (2×5 m) according to the soil fertility and physical conditions, climate and how the plants are conducted (Arruda et al, 2004;Dias et al, 2007;Cassiano et al, 2013). However, because it is a bush, care should be taken when choosing the population density to minimize the effects of competition for abiotic resources and prevent a microclimate propitious for pest and disease development (Drumond et al 2010;Brasileiro et al 2012;Horschutz et al 2012). Plant density, in addition to interfering in competition for water, nutrients, solar radiation and micro-climate establishment in the canopy, is also determinant in the sexual expression (Negussie et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Growth and yield of Jatropha curcas L. (Euphorbiaceae) plants cultivated in different spacing and treated with kinetin

et al. 2019

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Recommendations for J. curcas plants were studied for adequate crop spacing, and to increase the number of female and hermaphrodite flowers and fruit yields. The study was carried out in an experimental field in Brazil,using four-year-old adult plants in a 5 x 3 factorial in a completely randomized design with three replications. Treatments included five doses of the growth regulator kinetin (0, 3, 6, 9 and 12 mg L-1 at the volume of 330 ml per plant) in a single application to six plants and three planting spaces (3×3, 3×2, 3×1 m). The results showed that the applied kinetin doses did not interfere in the production index of J. curcas, but population density exerted a significant influence on the vegetative and reproductive development of the J. curcas plants in the 3x3 spacing, where competition for essential growth resources (water, light and nutrients) seems to have been less intense and the plants were more vigorous. Cropping J. curcas plants in 3 × 3 spacing is recommended to obtain vigorous plants with a high number of branches, inflorescences and high grain yield. Applying kinetin at concentrations lower than 12 mg L-1 did not interfere in the sexual expression of J. curcas flowers. Further studies with higher kinetin doses in 3 × 3 m spacing are necessary to elucidate and recommend new management practices.

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“…The pruning technic can contribute on the plant canopy structure development, reducing disease and insect incidence, improving the air flow within the canopy, and, associated to the irrigation, increasing the number of productive branches (Yarborough, 2006;Oliveira and Beltrão, 2010;Pescie et al, 2011). Moreover, when pruning on Jatropha is not performed, it interferes on the manual harvest efficiency and may decrease the flowering uniformity and increase the fruit maturation time (Alam et al, 2011;Brasileiro et al, 2012;Everson et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Irrigation history and pruning effect on growth and yield of jatropha on a plantation in southeastern Brazil

Santos¹,

Folegatti²,

Lena³

et al. 2016

Afr. J. Agric. Res.

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Jatropha is an oilseed culture that has been highlighted due some specific agronomic aspects. This plant produces high oil quantities in its seeds that is used for biodiesel production. One of the major challenges regarding to the Jatropha cultivation is the lack of information on many management techniques, especially the irrigation and pruning management in adult plants in southeastern Brazil. The objective of this study was to study the combined effect of irrigation history and different pruning on Jatropha plant growth and yield. The experiment was conducted during the 4 th year of Jatropha growing season at University of Sao Paulo experimental area in Piracicaba, Brazil. The experiment was arranged in randomized block with four replications and treatments were considered the pruning type: No pruning (P1), pruning at 1.5 m high and 2 m canopy diameter (P2), pruning at 2 m high and 2 m canopy diameter (P3). In addition, two water conditions were also evaluated: Irrigated (I) and rainfed conditions (R). Plant growth (height and canopy diameter) and leaf area index (LAI) were evaluated monthly and productive variables were determined at the end of the experiment. Irrigation history influenced canopy diameter, absolute growth rates for plant height and canopy diameter, the relative growth rate for canopy diameter, and all productive variables. Pruning provided differences in all growth variables, where P2 presented the highest average on plant growth rates. The plants under irrigation history conditions showed the highest yield.

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Floral biology and characterization of seed germination in physic nut (Jatropha curcas L.)

Cited by 14 publications

References 16 publications

Revisão: Jatropha curcas L.: aspectos morfofisiológicos e químicos

Revisão: Jatropha curcas L.: aspectos morfofisiológicos e químicos

Growth and yield of Jatropha curcas L. (Euphorbiaceae) plants cultivated in different spacing and treated with kinetin

Irrigation history and pruning effect on growth and yield of jatropha on a plantation in southeastern Brazil

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