| Effect of salicylhydroxamic acid on endosperm strength and embryo growth of Lactuca sativa L. cv Waldmann's Green seeds. | |
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MedLine Citation:
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PMID: 11538237 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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Salicylhydroxamic acid (SHAM) stimulated germination of photosensitive lettuce (Lactuca sativa L. cv Waldmann's Green) seeds in darkness. To determine whether SHAM acts on the embryo or the endosperm, we investigated separately effects of SHAM on growth potential of isolated embryos as well as on endosperm strength. Embryo growth potential was quantified by incubating decoated embryos in various concentrations of osmoticum and measuring subsequent radicle elongation. Growth potential of embryos isolated from seeds pretreated with 4 millimolar SHAM was equal to that of untreated controls. Rupture strength of endosperm tissue excised from seeds pretreated with SHAM was 33% less than that of controls in the micropylar region. To determine if the embryo must be in contact with the endosperm of SHAM to weaken the endosperm, some endosperms were incubated with SHAM only after dissection from seeds. Rupture strength of SHAM-treated, isolated endosperms in the micropylar region was 25% less than that of untreated controls. There was no difference in rupture strength in the cotyledonary region of endosperm isolated from seeds treated with SHAM in buffer or buffer alone. SHAM therefore stimulates germination not by enhancing embryo growth potential, but by weakening the micropylar region of the endosperm enclosing the embryo. |
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Authors:
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C A Brooks; C A Mitchell |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Plant physiology Volume: 86 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 1988 |
Date Detail:
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Created Date: 1996-12-16 Completed Date: 1996-12-16 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: 826-9 Citation Subset: S |
Affiliation:
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Department of Horticulture, Purdue University, West Lafayette, Indiana 47907, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Darkness Germination / drug effects*, physiology Hydrogen-Ion Concentration Lettuce / drug effects, embryology*, growth & development Salicylamides / pharmacology* Seeds / drug effects, growth & development* |
| Chemical | |
Reg. No./Substance:
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0/Salicylamides; 89-73-6/salicylhydroxamic acid |
| Investigator | |
Investigator/Affiliation:
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C A Mitchell / Purdue U, West Lafayette, IN |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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