Linked Life Data

18180072

Source:http://linkedlifedata.com/resource/pubmed/id/18180072

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
13
pubmed:dateCreated
2008-8-18
pubmed:abstractText
Here we examined the effects of root hypoxia (1-2% oxygen) on the physiology of the plant and on the biochemical composition of fruits in tomato (Solanum lycopersicum cv. Micro-Tom) plants submitted to gradual root hypoxia at first flower anthesis. Root hypoxia enhanced nitrate absorption with a concomitant release of nitrite and ammonium into the medium, a reduction of leaf photosynthetic activity and chlorophyll content, and an acceleration of fruit maturation, but did not affect final fruit size. Quantitative metabolic profiling of mature pericarp extracts by (1)H NMR showed that levels of major metabolites including sugars, organic acids and amino acids were not modified. However, ammonium concentration increased dramatically in fruit flesh, and ascorbate and lycopene concentrations decreased. Our data indicate that the unfavorable effects of root hypoxia on fruit quality cannot be explained by two of the well-known effects of root hypoxia on the plant, namely a decrease in photosynthesis or an excess in ethylene production, but may instead result from disturbances in the supply of either growth regulators or ammonium, by the roots.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1618-1328
pubmed:author
pubmed:issnType
Electronic
pubmed:day
8
pubmed:volume
165
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1352-9
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Prolonged root hypoxia induces ammonium accumulation and decreases the nutritional quality of tomato fruits.
pubmed:affiliation
Département des Sciences Biologiques, Faculté des Sciences de Tunis, UR d'Ecologie Végétale,Campus Universitaire, Tunis, Tunisia.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't