| Root-shoot interaction in the greening of wheat seedlings grown under red light. | |
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MedLine Citation:
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PMID: 11536685 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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Wheat seedlings grown with roots exposed to constant red light (300-500 micromoles m-2 s-1) did not accumulate chlorophyll in the leaves. In contrast, seedlings grown with their roots shielded from light accumulated chlorophylls. Chlorophyll biosynthesis could be induced in red-light-grown chlorophyll-deficient yellow plants by either reducing the red-light intensity at the root surface to 100 micromoles m-1 s-1 or supplementing with 6% blue light. The inhibition of chlorophyll biosynthesis was due to impairment of the Mg-chelatase enzyme working at the origin of the Mg-tetrapyrrole pathway. The root-perceived photomorphogenic inhibition of shoot greening demonstrates root-shoot interaction in the greening process. |
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Authors:
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B C Tripathy; C S Brown |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Plant physiology Volume: 107 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 1995 Feb |
Date Detail:
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Created Date: 1998-07-01 Completed Date: 1998-07-01 Revised Date: 2010-09-14 |
Medline Journal Info:
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Nlm Unique ID: 0401224 Medline TA: Plant Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 407-11 Citation Subset: S |
Affiliation:
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National Aeronautics and Space Administration, Kennedy Space Center, Florida 32899, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Chlorophyll
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biosynthesis* Dose-Response Relationship, Radiation Evaluation Studies as Topic Germination / radiation effects Light* Lighting Lyases / metabolism Plant Leaves / growth & development, metabolism, radiation effects Plant Roots / enzymology, growth & development, metabolism*, radiation effects Plant Shoots / enzymology, growth & development, metabolism*, radiation effects Protochlorophyllide / biosynthesis Protoporphyrins / biosynthesis Triticum / enzymology, growth & development, metabolism*, radiation effects |
| Chemical | |
Reg. No./Substance:
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0/Protoporphyrins; 1406-65-1/Chlorophyll; 14947-11-6/magnesium protoporphyrin; 16053-68-2/protoporphyrin IX monomethyl ester; 20369-67-9/Protochlorophyllide; EC 4.-/Lyases; EC 4.99.1-/magnesium chelatase |
| Investigator | |
Investigator/Affiliation:
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C S Brown / NASA KSC |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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