Sink Strength of Fruits of Two Tomato Genotypes Differing in Total Fruit Solids Content1

Abstract

Mobilization of carbohydrates to fruits of 2 genotypes of tomato (Lycopersicon esculentum Mill.) differing in total fruit solids content, LA 1563 (1563) and ‘VF145B-7879’ (‘7879’), was investigated. On the basis of 2 separate studies, fruits of 1563, the higher solids genotype, appeared to be stronger sinks for assimilates than fruits of ‘7879’. LA 1563 partitioned a significantly larger percentage of 14C to the fruits than ‘7879’. Fruits of 1563 took up more 14C-sucrose from agar medium than ‘7879’ fruits, both on the basis of total uptake and specific activity. Starch was found at higher levels in fruits of 1563 than in those of ‘7879’ from 10–30 days after anthesis. No starch was detectable in either genotype 50 days after anthesis. Fruit sucrose levels tended to be lower in 1563 than in ‘7879’ throughout fruit development. The possible physiological relationships between carbon metabolism and the rate of import of assimilates by fruits are discussed.

Climate Smart Agriculture with Drought Resistant Tomato (Solanum lycopersicum) Cultivars under Subtropical Climate

“…"Therefore, considering the overall performance, two cultivars BR-2 and BR-5 contributed the best performance probably due to drought tolerance by virtue of their partitioning ability of assimilates toward fruit development. The accumulations of assimilates towards fruit development are organic solutes as glucose and fructose developing osmotic adjustment in the production of fruits" [50,51].…”

Abscisic Acid Facilitates Sucrose Import by Strawberry Fruit Explants and Cortex Disks in Vitro

“…Both fruit explants and tissue disks have been used to study assimilate accumulation by sink tissues in vitro (1,4,9,12,14,22). Fruit explants offer the advantage of using an intact, nonwounded tissue.…”