Relationship between Fruit Soluble Solid Content and the Sucrose Concentration of the Phloem Sap at Different Leaf to Fruit Ratios in Tomato
スポンサーリンク
概要
- 論文の詳細を見る
Tomato fruits accumulate most of their solid contents during rapid fruit development. The balance of water transport to assimilate transport into fruits during that stage is an important factor that determines the final solid content of fruits at harvest. In this study, the relationship of sucrose concentration of the phloem sap to the solid content of rapidly growing fruits was investigated. At the anthesis of the second truss, the stem just above the first truss was heat-girdled, while newly emerging leaves above the second truss were pinched regularly to diminish cross translocation of carbohydrates between the source-sink unit, consisting of the second truss and three leaves below, and other parts of the plant. The leaf to fruit ratio (LFR) as the number of leaves per fruit of this isolated source-sink unit was manipulated at the fruit set of the truss. When LFR was increased from 0.2 to 1, fruit dry weight increased linearly from 3.5 to 7 g, but it saturated beyond the LFR of 1. By contrast, the contents of dry matter and soluble sugars on a fresh weight basis increased linearly within the whole range of LFR from 0.2 to 3. The sucrose concentration of the phloem sap, collected from the pedicel by the modified EDTA method, also increased as LFR increased, and a positive correlation was observed between sucrose concentration of the phloem sap and the contents of dry matter and total soluble sugars. These data suggested that solid content can be increased in a wide range of LFR in proportion to the sucrose concentration of the phloem sap.
- 園芸学会の論文
園芸学会 | 論文
- 液状マルチ資材の散布がコマツナの生育, 収量ならびに地温に及ぼす影響
- 生分解性鉢による育苗がトマトの生育ならびに養分含有率に及ぼす影響 : 第2報定植後の生育(繁殖・育苗)
- 生分解性鉢による育苗がトマトの生育ならびに養分含有率に及ぼす影響 : 第1報定植前の生育(繁殖・育苗)
- トマトの開花期における小花柄の脱離過程
- トマト果実の完熟後における小果柄の脱離組織の形態的変化