Leaf respiration and alternative oxidase in field‐grown alpine grasses respond to natural changes in temperature and light

Searle, Stephanie; Thomas, Samuel; Griffin, Kevin L.; Horton, Travis W.; Kornfeld, Ari; Yakir, Dan; Hurry, Vaughan; Turnbull, Matthew H.

doi:10.1111/j.1469-8137.2010.03557.x

Cited by 63 publications

(69 citation statements)

References 85 publications

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“…Silva Júnior et al (2015) achieved higher multiplication rates with Etligera elatior (Jack) R.M. Smith, for a concentration of 1.0 mg L -1 (5.5 shoots per explant) at 30 days, with the response curve displaying quadratic behaviour; a production of 3.8 shoots per explant was obtained at a concentration of 2.0 mg L -1 BAP.…”

Section: Resultsmentioning

confidence: 97%

“…Silva Júnior et al (2015) obtained superior results when testing different concentrations of NAA and a fixed dose of BAP, where the rate of shoots displayed a response curve with increasing linear behaviour in Etlingera elatior var. Red Torch for increasing concentrations of auxin, culminating in a rate of 9.82 shoots/explant at 90 days of growth in a culture medium containing 3.0 mg L -1 BAP and the addition of 1.0 mg L -1 NAA.…”

Section: Resultsmentioning

confidence: 99%

“…develop the ability to acclimatise to variations of light and temperature (SEARLE et al, 2011), adjusting their photosynthetic apparatus for the proper absorption, transfer and use of the electromagnetic energy available in their environment (GONÇALVES et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

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Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

Rodrigues

Santos

Carvalho

2016

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Considering the growing economic importance of tropical flowers and the advantages of techniques applied to the in vitro cultivation of these plants, it is necessary to carry out studies to evaluate growth in species such as Heliconia latispatha. The aim of this study therefore, was to evaluate in vitro shoot induction for different concentrations of BAP and NAA and as a function of the photoperiod. Explants from zygotic embryos were inoculated in MS medium containing different concentrations of BAP (0.0, 0.5, 1.0, 1.5, 2.0 or 2.5 mg L -1 ), with the cultures kept in a growth room at a temperature of 24.0 ± 2.0° C, under a photoperiod of 12 and 16 hours of light and a light intensity of 30 μmol m -2 s -1 . At 21, 28, 35, 42 and 49 days after inoculation, the number of shoots per explant was evaluated. The treatment at the BAP concentration that gave the best multiplication rate (2.5 mg L -1 ) was set, and was tested in a further trial with different concentrations of NAA (0.0, 0.2, 0.4, 0 6, 0.8 or 1.0 mg L -1 ) under the same conditions as the previous experiment. The experimental designs were completely randomised, with five replications, and analysed in a 6 x 2 factorial. The data were submitted to analysis of variance and regression. No significant differences were seen in relation to the photoperiod or its interaction with the cytokinin and auxin under test. Multiplication was greater in the presence of 2.5 mg L -1 BAP, which gave a rate of 1.25 shoots/explant at 49 days of in vitro culture. The association of this BAP dosage with 1.0 mg L -1 NAA was even more efficient, producing 1.83 shoots per explant at 30 days of growth. The use of BAP together with NAA is beneficial to the induction of shoots in H. latispatha. Keywords: Heliconiaceae, 6-benzylaminopurine, naphthaleneacetic acid, tissue culture. RESUMO Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimentoConsiderando a crescente importância econômica das flores tropicais e as vantagens das técnicas aplicadas ao cultivo in vitro para estas plantas, torna-se necessária a realização de estudos que avaliem a propagação de espécies como a Heliconia latispatha. Diante do exposto, o objetivo do trabalho foi avaliar a indução de brotações in vitro em função de diferentes concentrações de BAP e ANA em função de fotoperíodos. Os explantes, oriundos de embriões zigóticos, foram inoculados em meio MS contendo diferentes concentrações de BAP (0,0; 0,5; 1,0; 1,5; 2,0 ou 2,5 mg L -1 ), mantendo-se as culturas em sala de crescimento com temperatura de 24,0 ± 2,0 ºC sob fotoperíodo de 12 e 16 horas de luz e intensidade luminosa de 30 μmol m -2 s -1 . Aos 21, 28, 35, 42 e 49 dias após a inoculação, foi avaliado o número de brotos obtidos por explante. O tratamento com a concentração de BAP que proporcionou melhor taxa de multiplicação (2,5 mg L -1 ) foi fixado e, em outro ensaio foi testado com diferentes concentrações de ANA (0,0; 0,2; 0,4; 0,6; 0,8 ou 1,0 mg L -1 ) nas mesmas condições do experimento ...

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

Rodrigues

Santos

Carvalho

2016

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“…Em função disso, a maioria das plantas desenvolve capacidade para aclimatar-se às variações de temperatura e luminosidade (Searle et al, 2011), regulando a condutância estomática (Aasamaa & Sõber, 2011) e ajustando o aparato fotossintético para absorção adequada, transferência e utilização da energia eletromagnética disponível (Gonçalves et al, 2010).…”

Section: Revista Brasileira De Engenharia Agrícola E Ambientalunclassified

Crescimento e fotossíntese de plantas de pinhão-manso cultivadas em diferentes condições de luminosidade

Schock¹,

Ramm²,

Martinazzo³

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OO pinhão-manso (Jatropha curcas L.) tem-se destacado, no cenário do biodiesel, em função da porcentagem de óleo contido nas sementes e de sua capacidade adaptativa. No País, a cultura do pinhão-manso tem, como proposta, o desenvolvimento agronômico, razão pela qual o uso consorciado pode ser importante aos pequenos produtores. Este trabalho teve como objetivo avaliar algumas características fenológicas de pinhão-manso cultivado em dois regimes de luminosidade (pleno sol e sombrite 50%) relacionando com a sazonalidade climática e se utilizando de parâmetros da fluorescência da clorofila e de trocas gasosas. As plantas apresentaram crescimento vegetativo com padrão sazonal, com pico de crescimento no início de março, quando iniciou a senescência foliar. Alguns parâmetros da fluorescência transiente da clorofila analisados pelo Teste JIP, apresentaram relação com as flutuações ambientais. O PI ABS e o PI total demonstraram que as plantas do tratamento sombreado foram sensíveis à redução de luminosidade. A taxa assimilatória líquida e a eficiência de carboxilação reduziram ao longo do experimento acompanhando a queda da radiação solar; já as plantas de pinhão-manso respondem negativamente a essas condições de sombreamento. Growth and photosynthesis of Physic nut grown under different light conditions A B S T R A C TJatropha curcas L. has been prominent in the scenario of biodiesel due to the percentage of oil contained in the seeds and its adaptive capacity. The cultivation of J. curcas in the country has as proposal the agronomic development and its consortium may be important for small producers. This study aimed to characterize the phenological behavior of J. curcas grown under different light conditions, full sun and 50% shade, relating them to the climatic seasonality, comparing their development with chlorophyll a fluorescence and gas exchange. Plants showed vegetative growth with seasonal pattern, with growth peak at the beginning of March, when the leaf senescence began. The analysis of the kinetic of the transient fluorescence of chlorophyll presented a relationship between certain parameters of the test JIP and the environmental fluctuations. The PI ABS and the PI total demonstrated that in the shaded treatment plants were sensitive to luminosity reduction. The liquid assimilation rate and the carboxylation efficiency decreased throughout the experiment, accompanying the decline of the solar radiation. J. curcas plants respond negatively to these shaded conditions. Crescimento e fotossíntese de plantas de pinhão-manso cultivadas em diferentes condições de luminosidade

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“…3). AOX activity varies with growth conditions (Searle et al, 2011), is required for heat-production in selected tissues (Miller et al, 2011), and is believed to function as a mitochondrial AET path thereby minimizing mitochondrial ROS production (Maxwell et al, 1999). Mitochondrial UCP also lowers the ATP respiratory yield because it permits H + passage across the inner mitochondrial membrane without driving ATP synthesis at Complex IV (Fig.…”

Section: The Carbon-reactionsmentioning

confidence: 99%

Photosynthetic Productivity: Can Plants do Better?

Skillman¹,

Griffin²,

Earll³

et al. 2011

Thermodynamics - Systems in Equilibrium and Non-Equilibrium

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Leaf respiration and alternative oxidase in field‐grown alpine grasses respond to natural changes in temperature and light

Cited by 63 publications

References 85 publications

Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

Indução de brotações in vitro de Heliconia latispatha em função do fotoperíodo e reguladores de crescimento

Crescimento e fotossíntese de plantas de pinhão-manso cultivadas em diferentes condições de luminosidade

Photosynthetic Productivity: Can Plants do Better?

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