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. 2015 Jun 5;6:416. doi: 10.3389/fpls.2015.00416

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Copyright © 2015 Li, Heuvelink and Marcelis.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Estimated source strength (crop growth rate; A) and source/sink ratio (B) over time for the three tomato cultivars with standard fruit load. Lines are moving averages over 5 days. Dashed horizontal line in (B) represents a source/sink ratio of 1. Arrow in X-axis indicates 30 days after planting. Fruit set started between 20–30 days after planting for the three cultivars. Therefore, the left side of arrow was defined as early growth stage, the right side of arrow was defined as fully fruiting stage.