PubMed Health⌕ Search

Biomedical subjects

Greg Tucker

Publications and source records attributed to Greg Tucker.

4 recordsLinked to original sources

Nutritional enhancement of plants.

Plants can provide most of the nutrients required in the human diet; however, the major staple crops are often deficient in some of these nutrients. Thus, malnutrition, with respect to micronutrients like vitamin A, iron and zinc, affects >40% of the world's population. Advances in molecular biology are being exploited to produce crops enhanced in these key nutrients. Other nutritional targets include the modification of fatty acid composition and the enhancement of antioxidant levels, particularly carotenoids, such as lycopene, and flavonoids. However, the benefit of these 'biofortified' crops to human nutrition remains to be elucidated.

Agriculture↗

Ripe for a change.

As rich sources of vitamins and minerals, fruits are an important part of our diet. However, they are highly perishable. As the biochemical basis for fruit quality is being unraveled, so genetic approaches are being developed to modify the way in which fruit ripen, for the benefit of the consumer.

Consumer Behavior↗

Life on the vine.

Explore the source record for details and available documents.

Carotenoids↗

Modification of fatty acid composition in tomato (Lycopersicon esculentum) by expression of a borage delta6-desaturase.

The improvement of nutritional quality is one potential application for the genetic modification of plants. One possible target for such manipulation is the modification of fatty acid metabolism. In this work, expression of a borage delta6-desaturase cDNA in tomato (Lycopersicon esculentum L.) has been shown to produce gamma-linolenic acid (GLA; 18:83 delta6,9,12) and octadecatetraenoic acid (OTA; 18:4 delta6,9,12,15) in transgenic leaf and fruit tissue. This genetic modification has also, unexpectedly, resulted in a reduction in the percentage of linoleic acid (LA 18:2 delta9,12) and a concomitant increase in the percentage of alpha-linolenic acid (ALA; 18:3 delta9,12,15) in fruit tissue. These changes in fatty acid composition are thought to be beneficial for human health.

Borago↗