Metabolism and Compartmentation of Imported Sugars in Sink Organs in Relation to Sink Strength

Metabolism and Compartmentation of Imported Sugars in Sink Organs in Relation to Sink Strength In the last two centuries, the yield of economically important crops has been substantially increased through plant breeding and optimization of growing conditions. The improvement of yield was made possible because both dry­ matter production in the leaves and accumulation of dry matter by harvestable organs have been improved. For instance in potato, the modem cultivar (Solanum tuberosum) has a plant dry weight 10 times higher than the wild species (S. demissum); tuber dry weight, as a proportion of plant weight (i. e. harvest index) has increased from 7% to 81% (65). Through plant breeding, the genetic yield potential of wheat, soya bean, com, and peanuts has been improved by 40 -100% within this century (46). The increased grain yield of winter wheat and spring barley in England can be entirely accounted for by the increase of harvest indexes, as the biomass yield of the modem varieties is the same as that of ones bred before modem breeding was practiced (1). In general, the higher photosynthetic capacity of the modem cultivars of economic crops has been achieved mainly by increasing the light-intercepting area of leaves; this has been achieved by either increasing the number of leaves, as in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Plant Biology Annual Reviews

Metabolism and Compartmentation of Imported Sugars in Sink Organs in Relation to Sink Strength

Annual Review of Plant Biology, Volume 39 (1) – Jun 1, 1988

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Publisher
Annual Reviews
Copyright
Copyright 1988 Annual Reviews. All rights reserved
Subject
Review Articles
ISSN
1040-2519
D.O.I.
10.1146/annurev.pp.39.060188.002035
Publisher site
See Article on Publisher Site

Abstract

In the last two centuries, the yield of economically important crops has been substantially increased through plant breeding and optimization of growing conditions. The improvement of yield was made possible because both dry­ matter production in the leaves and accumulation of dry matter by harvestable organs have been improved. For instance in potato, the modem cultivar (Solanum tuberosum) has a plant dry weight 10 times higher than the wild species (S. demissum); tuber dry weight, as a proportion of plant weight (i. e. harvest index) has increased from 7% to 81% (65). Through plant breeding, the genetic yield potential of wheat, soya bean, com, and peanuts has been improved by 40 -100% within this century (46). The increased grain yield of winter wheat and spring barley in England can be entirely accounted for by the increase of harvest indexes, as the biomass yield of the modem varieties is the same as that of ones bred before modem breeding was practiced (1). In general, the higher photosynthetic capacity of the modem cultivars of economic crops has been achieved mainly by increasing the light-intercepting area of leaves; this has been achieved by either increasing the number of leaves, as in

Journal

Annual Review of Plant BiologyAnnual Reviews

Published: Jun 1, 1988

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