Document Detail


Ethylene stimulation of latex yield depends on the expression of a sucrose transporter (HbSUT1B) in rubber tree (Hevea brasiliensis).
MedLine Citation:
PMID:  20980289     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Hevea brasiliensis is an important industrial crop for natural rubber production. Latex biosynthesis occurs in the cytoplasm of highly specialized latex cells and requires sucrose as the unique precursor. Ethylene stimulation of latex production results in high sugar flow from the surrounding cells of inner bark towards the latex cells. The aim of this work was to understand the role of seven sucrose transporters (HbSUTs) and one hexose transporter (HbHXT1) in this process. Two Hevea clones were used: PB217 and PB260, respectively described as high and low yielding clones. The expression pattern of these sugar transporters (HbSUTs and HbHXT1) was monitored under different physiological conditions and found to be maximal in latex cells. HbSUT1, one of the most abundant isoforms, displayed the greatest response to ethylene treatment. In clone PB217, ethylene treatment led to a higher accumulation of HbSUT1B in latex cells than in the inner bark tissues. Conversely, stronger expression of HbSUT1B was observed in inner bark tissues than in latex cells of PB260. A positive correlation with HbSUT1B transcript accumulation and increased latex production was further supported by its lower expression in latex cells of the virgin clone PB217.
Authors:
Anaïs Dusotoit-Coucaud; Panida Kongsawadworakul; Laurence Maurousset; Unshira Viboonjun; Nicole Brunel; Valérie Pujade-Renaud; Hervé Chrestin; Soulaïman Sakr
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Publication Detail:
Type:  Journal Article     Date:  2010-10-26
Journal Detail:
Title:  Tree physiology     Volume:  30     ISSN:  0829-318X     ISO Abbreviation:  Tree Physiol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100955338     Medline TA:  Tree Physiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  1586-98     Citation Subset:  IM    
Affiliation:
Clermont Université, Université Blaise Pascal, UMRA 547 PIAF, F-63177 Aubière, France.
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