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OtherBIOCHEMISTRY AND ENZYMOLOGY
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Light-Dependent Isoprene Emission (Characterization of a Thylakoid-Bound Isoprene Synthase in Salix discolor Chloroplasts)

M. C. Wildermuth, R. Fall
M. C. Wildermuth
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R. Fall
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Published September 1996. DOI: https://doi.org/10.1104/pp.112.1.171

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Abstract

Isoprene synthase is an enzyme that is responsible for the production of the volatile C5 hydrocarbon, isoprene, in plant leaves. Isoprene formation in numerous C3 plants is interesting because (a) large quantities of isoprene are emitted, 5 x 1014 g of C annually, (b) a plant may release 1 to 8% of its fixed C as isoprene, and (c) the function of plant isoprene production is unknown. Because of the dependence of foliar isoprene emission on light, the existence of a plastidic isoprene synthase has been postulated. To pursue this idea, a method to isolate chloroplasts from Salix discolor was developed and shows a plastidic isoprene synthase that is tightly bound to the thylakoid membrane and accessible to trypsin inactivation. The thylakoid-bound isoprene synthase has catalytic properties similar to known soluble isoprene synthases; however, the relationship between these enzymes is unknown. The discovery of a thylakoid-bound isoprene synthase with a stromal-facing domain places it in the chloroplast, where it may be subject to numerous direct and indirect light-mediated effects. Implications for the light-dependent regulation of foliar isoprene production and its function are presented.

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Light-Dependent Isoprene Emission (Characterization of a Thylakoid-Bound Isoprene Synthase in Salix discolor Chloroplasts)
M. C. Wildermuth, R. Fall
Plant Physiology Sep 1996, 112 (1) 171-182; DOI: 10.1104/pp.112.1.171

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Light-Dependent Isoprene Emission (Characterization of a Thylakoid-Bound Isoprene Synthase in Salix discolor Chloroplasts)
M. C. Wildermuth, R. Fall
Plant Physiology Sep 1996, 112 (1) 171-182; DOI: 10.1104/pp.112.1.171
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Plant Physiology
Vol. 112, Issue 1
Sep 1996
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  • Brittle-1, an Adenylate Translocator, Facilitates Transfer of Extraplastidial Synthesized ADP-Glucose into Amyloplasts of Maize Endosperms
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  • The Superoxide Synthases of Rose Cells
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