Document Detail

Fruit load and elevation affect ethylene biosynthesis and action in apple fruit (Malus domestica L. Borkh) during development, maturation and ripening.
MedLine Citation:
PMID:  17897417     Owner:  NLM     Status:  MEDLINE    
The influence of internal and external factors such as tree fruit load and elevation on ethylene biosynthesis and action was assessed during apple fruit development and ripening. Ethylene biosynthesis, as well as transcript accumulation of the hormone biosynthetic enzymes (MdACS1 and MdACO1), receptors (MdETR1 and MdERS1) and an element of the transduction pathway (MdCTR1), were evaluated in apples borne by trees with high (HL) and low (LL) fruit load. Orchards were located in two localities differing in elevation and season day degree sum. These parameters significantly affected the date of bloom and commercial harvest, and the length of the fruit developmental cycle. Trees from the low elevation (LE) bloomed and the fruit ripened earlier than those from the high elevation (HE), displaying also a shortened fruit developmental cycle. Dynamics of ethylene evolution was apparently not affected by elevation. The onset of ethylene evolution started 130 days after bloom (DAB) at both elevations. During early ripening, fruits from LL trees produced significantly more ethylene than those from HL trees. Expression analysis of MdACS1, MdACO1 and MdERS1 indicated that the transcript accumulation well correlated with ethylene evolution. MdCTR1 was expressed at constant level throughout fruit growth and development up to 130 DAB, thereafter, the transcript accumulation decreased up to commercial harvest, concurrently with the onset of ethylene evolution.
Valeriano Dal Cin; Marcello Danesin; Alessandro Botton; Andrea Boschetti; Alberto Dorigoni; Angelo Ramina
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Plant, cell & environment     Volume:  30     ISSN:  0140-7791     ISO Abbreviation:  Plant Cell Environ.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-09-27     Completed Date:  2007-12-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9309004     Medline TA:  Plant Cell Environ     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1480-5     Citation Subset:  IM    
Department of Environmental Agronomy and Crop Science, University of Padova, Agripolis, Viale dell'Università 16, 35020 Legnaro, Padova, Italy.
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MeSH Terms
Ethylenes / biosynthesis*
Fruit / growth & development*,  metabolism*
Gene Expression Regulation, Plant
Malus / genetics,  metabolism*
Plant Proteins / genetics,  metabolism
Time Factors
Reg. No./Substance:
0/Ethylenes; 0/Plant Proteins; 74-85-1/ethylene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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