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21 results on '"te Lintel Hekkert, Sacco"'

3. Research Tools: Ethylene Detection

Author

Cristescu, Simona M., primary, Woltering, Ernst, additional, Hermans, Christian, additional, Harren, Frans J.M., additional, and te Lintel Hekkert, Sacco, additional

Published
2014
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5. Research tools: Ethylene detection

Author

Cristescu, Simona M., Woltering, Ernst, Hermans, Christian, Harren, Frans J. M., Te Lintel Hekkert, Sacco, Cristescu, Simona M., Woltering, Ernst, Hermans, Christian, Harren, Frans J. M., and Te Lintel Hekkert, Sacco

Abstract

info:eu-repo/semantics/published

Published
2014

7. Budgets for nocturnal VOC oxidation by nitrate radicals aloft during the 2006 Texas Air Quality Study

Author

Brown, Steven S., primary, Dubé, William P., additional, Peischl, Jeff, additional, Ryerson, Thomas B., additional, Atlas, Elliot, additional, Warneke, Carsten, additional, de Gouw, Joost A., additional, te Lintel Hekkert, Sacco, additional, Brock, Charles A., additional, Flocke, Frank, additional, Trainer, Michael, additional, Parrish, David D., additional, Feshenfeld, Frederick C., additional, and Ravishankara, A. R., additional

Published
2011
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15. Photoacoustic and Photothermal Detection of the Plant Hormone Ethylene.

Author

Walker, John M., Tucker, Gregory A., Roberts, Jeremy A., Voesenek, Laurentius A. C. J., Harren, Frans J. M., de Vries, Hugo S. M., Sikkens, Cor A., te Lintel Hekkert, Sacco, and Blom, Cornelis W. P. M.

Abstract

The hydrocarbon ethylene (C2H4) is a plant hormone that plays an important role in the regulation of many environmentally and developmentally induced processes, such as stress resistance, seed germination, fruit ripening, senescence, and abscission (1). All tissue types and probably all cells of higher plants produce and liberate ethylene (2). Many lower plants, such as liverworts, mosses, ferns, lycopods, and horse tails, also are producers of ethylene, although the biosynthetic route seems to be different (2,3). Tremendous progress has been achieved during the last two decades in the biochemical and molecular characterization of the biosynthetic pathway for ethylene in higher plants (4,5). [ABSTRACT FROM AUTHOR]

Published
2000
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17. LIGHT ACTION SPECTRA OF N2 FIXATION BY HETEROCYSTOUS CYANOBACTERIA FROM THE BALTIC SEA1.

Author

Staal, Marc, Stal, Lucas J., te Lintel Hekkert, Sacco, and Harren, Frans J. M.

Subjects
INDUSTRIAL lasers, AGRICULTURE, SPECTROPHOTOMETERS, PLANT proteins, PHOTOSYNTHESIS
Abstract

An on-line, laser photo-acoustic, trace gas detection system in combination with a stepper motor-controlled monochromator was used to record semicontinuous light action spectra of nitrogenase activity in heterocystous cyanobacteria. Action spectra were made of cultures of Nodularia spumigena Mertens ex Bornet & Flahault, Aphanizomenon flos-aquae Ralfs ex Bornet & Flahault, and Anabaena sp. and from field samples of a cyanobacterial bloom in the Baltic Sea. Nitrogenase activity was stimulated by monochromatic light coinciding the red and blue peaks of chl a , the phycobiliproteins phycocyanin (allophycocyanin) and phycoerythrin, and several carotenoids. Because nitrogenase is confined to the heterocyst, it was concluded that all photopigments must have been present in these cells, were involved in light harvesting and photosynthesis, and supplied the energy for N2 fixation. The species investigated showed marked differences in their nitrogenase action spectra, which might be related to their specific niches and to their success in cyanobacterial blooms. Moreover, light action spectra of nitrogenase activity shifted during the day, probably as the result of changes in the phycobiliprotein content of the heterocyst relative to chl a . Action spectra of nitrogenase and changes in pigment composition are essential for the understanding of the competitive abilities of species and for the estimation of N2 fixation by a bloom of heterocystous cyanobacteria. [ABSTRACT FROM AUTHOR]

Published
2003
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18. LIGHT ACTION SPECTRA OF N2 FIXATION BY HETEROCYSTOUS CYANOBACTERIA FROM THE BALTIC SEA1.

Author

Staal, Marc, Stal, Lucas J., te Lintel Hekkert, Sacco, and Harren, Frans J. M.

Subjects
*INDUSTRIAL lasers, *AGRICULTURE, *SPECTROPHOTOMETERS, *PLANT proteins, *PHOTOSYNTHESIS
Abstract

An on-line, laser photo-acoustic, trace gas detection system in combination with a stepper motor-controlled monochromator was used to record semicontinuous light action spectra of nitrogenase activity in heterocystous cyanobacteria. Action spectra were made of cultures of Nodularia spumigena Mertens ex Bornet & Flahault, Aphanizomenon flos-aquae Ralfs ex Bornet & Flahault, and Anabaena sp. and from field samples of a cyanobacterial bloom in the Baltic Sea. Nitrogenase activity was stimulated by monochromatic light coinciding the red and blue peaks of chl a , the phycobiliproteins phycocyanin (allophycocyanin) and phycoerythrin, and several carotenoids. Because nitrogenase is confined to the heterocyst, it was concluded that all photopigments must have been present in these cells, were involved in light harvesting and photosynthesis, and supplied the energy for N2 fixation. The species investigated showed marked differences in their nitrogenase action spectra, which might be related to their specific niches and to their success in cyanobacterial blooms. Moreover, light action spectra of nitrogenase activity shifted during the day, probably as the result of changes in the phycobiliprotein content of the heterocyst relative to chl a . Action spectra of nitrogenase and changes in pigment composition are essential for the understanding of the competitive abilities of species and for the estimation of N2 fixation by a bloom of heterocystous cyanobacteria. [ABSTRACT FROM AUTHOR]

Published
2003
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19. Ethylene Production by Botrytis cinerea In Vitro and in Tomatoes

Author

Domenico De Martinis, Simona M. Cristescu, Frans J. M. Harren, David H. Parker, Sacco te Lintel Hekkert, Harren, Fran, Parker, David, te Lintel Hekkert, Sacco, De Martinis, Domenico, and Cristescu, Simona

Subjects
Hyphal growth, Ethylene, food.ingredient, Plant physiology, Biology, Applied Microbiology and Biotechnology, Tomato, Conidium, Botrytis cinerea, chemistry.chemical_compound, Plant Microbiology, food, Solanum lycopersicum, Botany, Botrytis, Ecology, fungi, food and beverages, Plant, Plant Pathology, Fruit, Ethylenes, biology.organism_classification, Aminooxyacetic acid, Horticulture, chemistry, Germination, Food Science, Biotechnology
Abstract

A laser-based ethylene detector was used for on-line monitoring of ethylene released by the phytopathogenic fungus Botrytis cinerea in vitro and in tomato fruit. Ethylene data were combined with the results of a cytological analysis of germination of B. cinerea conidia and hyphal growth. We found that aminoethoxyvinylglycine and aminooxyacetic acid, which are competitive inhibitors of the 1-aminocyclopropane-1-carboxylic acid pathway, did not inhibit the ethylene emission by B. cinerea and that the fungus most likely produces ethylene via the 2-keto-4-methylthiobutyric acid pathway. B. cinerea is able to produce ethylene in vitro, and the emission of ethylene follows the pattern that is associated with hyphal growth rather than the germination of conidia. Ethylene production in vitro depended on the l -methionine concentration added to the plating medium. Higher values and higher emission rates were observed when the concentration of conidia was increased. Compared with the ethylene released by the fungus, the infection-related ethylene produced by two tomato cultivars (cultivars Money Maker and Daniela) followed a similar pattern, but the levels of emission were 100-fold higher. The time evolution of enhanced ethylene production by the infected tomatoes and the cytological observations indicate that ethylene emission by the tomato-fungus system is not triggered by the ethylene produced by B. cinerea , although it is strongly synchronized with the growth rate of the fungus inside the tomato.

Published
2002
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20. Ethylene response to pollen tube growth in Nicotiana tabacum flowers

Author

Celestina Mariani, S. Te Lintel Hekker, G. Cotti, Frans J. M. Harren, Domenico De Martinis, Mariani, Celestina, Harren, Fran, te Lintel Hekkert, Sacco, Cotti, Gina, and De Martinis, Domenico

Subjects
Ethylene, Flower, Plant, Tobacco, Pollen, Reproduction, Gynoecium, Pollination, Nicotiana tabacum, Amino Acids, Cyclic, Plant Science, medicine.disease_cause, Botany, otorhinolaryngologic diseases, Genetics, medicine, Solanaceae, Nicotiana, biology, Aminobutyrates, fungi, food and beverages, Equipment Design, Ethylenes, biology.organism_classification, Nicotiana rustica, Pollen tube, Plant Structures, Pollen-pistil interaction
Abstract

In flowers of Nicotiana tabacum L., pollination induces a transient increase in ethylene production by the pistil. The characteristic dynamics of the increase in ethylene correspond to the main steps of the pollen-tube journey into the pistil: penetration into the stigma, growth through the style, entry into the ovary and fertilization. Ethylene is synthesized de novo in the pistil, and its production is reduced in the dark. Ethylene production was monitored in tobacco flowers after pollination with incongruous pollen from three different Nicotiana species, N. rustica, N. repanda and N. trigonophylla, and with pollen from Petunia hybrida. Pollen from all of these different sources can germinate on the stigma surface but each pollen type shows a different behavior and efficiency in penetrating the pistil tissues. Thus, these different crosses provided a model with which to study the response of the pistil to pollination and fertilization. Ethylene evolution upon pollination in tobacco differed in each cross, suggesting that ethylene is correlated with the response to pollen tube growth in the tobacco flower.

Published
2002

21. Comparison of models describing light dependence of N(2) fixation in heterocystous cyanobacteria.

Author

Staal M, te Lintel Hekkert S, Herman P, and Stal LJ

Subjects
Cyanobacteria enzymology, Models, Biological, Nitrogenase metabolism, Photosynthesis, Cyanobacteria metabolism, Light, Nitrogen Fixation
Abstract

The abilities of four models to describe nitrogenase light-response curves were compared, using the heterocystous cyanobacterium Nodularia spumigena and a cyanobacterial bloom from the Baltic Sea as examples. All tested models gave a good fit of the data, and the rectangular hyperbola model is recommended for fitting nitrogenase-light response curves. This model describes an enzymatic process, while the others are empirical. It was possible to convert the process parameters between the four models and compare N(2) fixation with photosynthesis. The physiological meanings of the process parameters are discussed and compared to those of photosynthesis.

Published
2002
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