Plants to power: bioenergy to fuel the future

Yuan, Joshua S.; Tiller, Kelly; Al‐Ahmad, Hani; Stewart, Nathan; Stewart, C. Neal

doi:10.1016/j.tplants.2008.06.001

Cited by 403 publications

(265 citation statements)

References 89 publications

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“…[18] Some terpenoids can be used as biofuels including jet fuels. [19] Despite their versatile uses, large scale supplies of many useful terpenoids have been limited, since they are usually found only in small amounts from natural resources. [20] Furthermore, their complex structures made them difficult to be chemically synthe sized as well.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Engineering of Microorganisms for the Production of Natural Compounds

Park

Yang

et al. 2017

Adv. Biosys.

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Natural products have been attracting much interest around the world for their diverse applications, especially in drug and food industries. Plants have been a major source of many different natural products. However, plants are affected by weather and environmental conditions and their successful extraction is rather limited. Chemical synthesis is inefficient due to the complexity of their chemical structures involving enantioselectivity and regioselectivity. For these reasons, an alternative means of overproducing valuable natural products using microorganisms has emerged. In recent years, various metabolic engineering strategies have been developed for the production of natural products by microorganisms. Here, the strategies taken to produce natural products are reviewed. For convenience, natural products are classified into four main categories: terpenoids, phenylpropanoids, polyketides, and alkaloids. For each product category, the strategies for establishing and rewiring the metabolic network for heterologous natural product biosynthesis, systems approaches undertaken to optimize production hosts, and the strategies for fermentation optimization are reviewed. Taken together, metabolic engineering has enabled microorganisms to serve as a prominent platform for natural compounds production. This article examines both the conventional and novel strategies of metabolic engineering, providing general strategies for complex natural compound production through the development of robust microbial‐cell factories.

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Section: Introductionmentioning

confidence: 99%

Metabolic Engineering of Microorganisms for the Production of Natural Compounds

Park

Yang

et al. 2017

Adv. Biosys.

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“…Entretanto, isso requerirá modificações feitas através de engenharia genética [189][190][191] ou alternativamente reestruturar (ou reinventar) o metabolismo dessas espécies. [192][193][194] Neste sentido, enormes esforços precisam ser feitos para atingir micro-organismos hospedeiros com produção otimizada, devendo-se levar em conta que a inerente complexidade dos micro-organismos representa um enorme desafio para a engenharia celular.…”

Section: Catálise Heterogênea áCida E Alcalinaunclassified

Biodiesel: visão crítica do status atual e perspectivas na academia e na indústria

Dabdoub¹,

Bronzel²,

Rampin³

2009

Quím. Nova

103

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Recebido em 27/2/09; aceito em 31/3/09; publicado na web em 7/4/09 BioDiESEL: A CRiTiCAL oVERViEW oN THE CURRENT STATUS AND PERSPECTiVES AT THE ACADEmY AND iNDUSTRY. This article presents a bibliographic review of research carried out on different alternative processes for biodiesel production. The supercritical and subcritical (non catalytic) reaction conditions, the use of solid basic, solid acid and other heterogeneous catalysts, including the use of immobilized enzymes and whole-cell catalysts are also critically compared with the traditional homogeneous alkaline or acid catalysts that are common on industrial applications. Advantages and limitations of all these processes for the transference from the laboratory to the industry are discussed. A correlation of the chemical composition with the quality parameters of the produced biodiesel is done with aim to stablish adequate procedures for the right selection of the rawmaterial. Castor bean oil is used as an example of inappropriate oil in order to produce a B100 that fulfill all the international physicochemical quality standards. in this article are presented research results to adequate the values of viscosity, density and iodine number of the castor and soybean biodiesel to the international standard limits by means blending these both biodiesels at the right ratio.Keywords: transesterification; biodiesel; catalysts. introduÇãoAumento da demanda mundial por combustíveis líquidos, aquecimento global, segurança energética, vontade política por desenvolvimento nos campos agrícola, social e também energético são pontos que abrem novas áreas de interesse e oportunidades para pesquisas e desenvolvimento na Academia e na indústria, pois são as forças motoras responsáveis pelo renovado interesse na produção de biocombustíveis.Um dos grandes destaques da atualidade na área de biocombustí-veis é o interesse pelo uso de recursos naturais baseados em materiais lignocelulósicos 1-3 para a produção de etanol ou por fontes produtoras de lipídeos usados para a produção de biodiesel.Biodiesel é o nome dado a ésteres alquílicos de ácidos graxos desde que atendam certos parâmetros de qualidade. 4-8 Além de esses ésteres serem derivados de fontes biológicas como plantas e animais, atuam como combustível substituto ao diesel de petróleo, com desempenho muito próximo, não exigindo modificações nos motores. Tradicionalmente o biodiesel é produzido através das reações de transesterificação de triglicerídeos, usando geralmente catalisadores alcalinos, 9 ou da esterificação de ácidos graxos livres, sendo que neste último caso, os ácidos graxos livres (AGLs) são submetidos à reação direta com um álcool de 4 carbonos ou menos, na presença de catalisadores ácidos. 10-12 mais recentemente o uso de diversos catalisadores heterogêneos tem sido descrito na literatura. 13 Transesterificação é o processo de transformação de um éster carboxílico em outro, através da troca do grupo Ro -presente no éster original, por outro grupo semelhante proveniente de um álcool na presença de um catalisa...

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“…Perennial C 4 bioenergy crops such as switchgrass (Panicum virgatum L.) and Miscanthus spp. provide good targets as non-edible plant species [6][7][8] having advantages with regard to land utilization and the avoidance of conflict with food security [9][10][11] to provide efficient production systems at low cost.…”

Section: Introductionmentioning

confidence: 99%

Molecular Regulation of Flowering Time in Grasses

Nuñez

Yamada

2017

Agronomy

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Flowering time is a key target trait for extending the vegetative phase to increase biomass in bioenergy crops such as perennial C 4 grasses. Molecular genetic studies allow the identification of genes involved in the control of flowering in different species. Some regulatory factors of the Arabidopsis pathway are conserved in other plant species such as grasses. However, differences in the function of particular genes confer specific responses to flowering. One of the major pathways is photoperiod regulation, based on the interaction of the circadian clock and environmental light signals.Depending on their requirements for day-length plants can be classified as long-day (LD), short-day (SD), and day-neutral. The CONSTANS (CO) and Heading Date 1 (Hd1), orthologos genes, are central regulators in the flowering of Arabidopsis and rice, LD and SD plants, respectively. Additionally, Early heading date 1 (Ehd1) induces the expression of Heading date 3a (Hd3a), conferring SD promotion and controls Rice Flowering Locus T 1 (RFT1) in LD conditions, independently of Hd1. Nevertheless, the mechanisms promoting flowering in perennial bioenergy crops are poorly understood. Recent progress on the regulatory network of important gramineous crops and components involved in flowering control will be discussed.

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Plants to power: bioenergy to fuel the future

Cited by 403 publications

References 89 publications

Metabolic Engineering of Microorganisms for the Production of Natural Compounds

Metabolic Engineering of Microorganisms for the Production of Natural Compounds

Biodiesel: visão crítica do status atual e perspectivas na academia e na indústria

Molecular Regulation of Flowering Time in Grasses

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