Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives.

Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Research Abstract Details 

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Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Abstract Text:

A J Kortstee,N J G Appeldoorn,M E P Oortwijn,R G F Visser,

Early development and growth of fruit in the domesticated tomato Solanum lycopersicum cultivar Money Maker and two of its wild relatives, S. peruvianum LA0385 and S. habrochaites LA1777, were studied. Although small differences exist, the processes involved and the sequence of events in fruit development are similar in all three species. The growth of developing fruits is exponential and the relative growth rate accelerates from 5 days after pollination (DAP 5) to DAP 8, followed by a decline during further development. Growth is positively correlated to the standard "Brix plus starch'' in the period DAP 8-DAP 20. Carbohydrate composition and levels of sugars and organic acids differ in fruits of the wild accessions compared to domesticated tomato. The wild accessions accumulate sucrose instead of glucose and fructose, and ripe fruits contain higher levels of malate and citrate. The enzymes responsible for the accumulation of glucose and fructose in domesticated tomatoes are soluble invertase and sucrose synthase. The regulation of initial carbohydrate metabolism in the domesticated tomato differs from that in the wild species, as could be concluded from measuring activities of enzymes involved in primary carbohydrate metabolism. Furthermore, changes in the activity of several enzymes, e.g., cell wall invertase, soluble invertase, fructokinase and phosphoglucomutase, could be attributed to changes in gene expression level. For other enzymes, additional control mechanisms play a role in the developing tomato fruits. Localization by in-situ activity staining of enzymes showed comparable results for fruits of domesticated tomato and the wild accessions. However, in the pericarp of S. peruvianum, less activity staining of phosphogluco-isomerase, phosphoglucomutase and UDP-glucosepyrophosphorylase was observed.

Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Publishing Authors By Initials

AJ Kortstee,NJ Appeldoorn,ME Oortwijn,RG Visser,

For similar natural sciences: time: time factors research abstracts see: natural sciences: time: time factors research

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Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Planta

VOLUME: 226

Page Numbers: 929-39

Journal Abbreviation: Planta

ISSN: 0032-0935

DAY: 22

MONTH: 05

YEAR: 2007

Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Information

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LANGUAGE: eng

NlmUniqueID: 1250576

Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Keywords Mesh Terms:

KEYWORDS: Time Factors

MESH TERMS: metabolism

Chemical & Substance for Abstract: Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives. Information

Substance Name: Phosphoglucomutase

Registry Number: EC 5.4.2.2

Grant and Affiliation Information for Differences in regulation of carbohydrate metabolism during early fruit development between domesticated tomato and two wild relatives.

AFFILIATION: Laboratory of Plant Breeding, Department of Plant Sciences, Wageningen University, P.O. Box 386, 6700 AJ Wageningen, The Netherlands. anne.kortstee@wur.nl

Country: Germany

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MEDLINETA: Planta

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