Document Detail

Secretion of momilactone A and B by the moss Hypnum plumaeforme.
MedLine Citation:
PMID:  19820317     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Nevertheless both plants are taxonomically quite distinct, momilactone A and B have been found only in rice and the moss, Hypnum plumaeforme which often forms large pure colonies. But biological meanings of momilactone A and B in H. plumaeforme is unknown. UV-irradiation induced a 15- and 16-fold increase in the secretion level of momilactone A and B, respectively, by H. plumaeforme into the growth medium. Jasmonic acid and the protein phosphatase inhibitor, cantharidin, also increased the momilactone A and B secretion levels by 12- to 15-fold. Cantharidin acts as an elicitor, jasmonic acid is an important signaling molecule regulating inducible defense genes against the pathogen infections. Therefore, elicitor and/or pathogen attacks may increase the secretion of momilactone A and B. As momilactone A and B are phytoalexic and allelopathic, the increasing secretion of momilactone A and B may be associated with the activation of the defense responses of H. plumaeforme in the rhizosphere where plants must compete with invading root systems of neighboring plants and prevent from bacteria and fungi infections. Momilactone A and B may be able to prevent H. plumaeforme from pathogen infections and help competition with neighboring plants resulting in the formation of pure colonies.
Hisashi Kato-Noguchi
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Publication Detail:
Type:  Comment; Journal Article     Date:  2009-08-20
Journal Detail:
Title:  Plant signaling & behavior     Volume:  4     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-10-12     Completed Date:  2010-05-03     Revised Date:  2010-09-27    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  737-9     Citation Subset:  -    
Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan.
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MeSH Terms
Comment On:
J Plant Physiol. 2009 Jul 1;166(10):1118-22   [PMID:  19232772 ]

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