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Effect of Salt Stress on the Growth and Fruit Quality of Tomato Plants

  • Takeshi Saito
  • Chiaki MatsukuraEmail author
Chapter

Abstract

During the past several decades, salt injury has arisen as one of the most serious problems in agriculture worldwide, especially in arid and semiarid areas. Generally, excessive exposure of crops to salinity stress leads to yield reduction and loss of quality. However, for tomato crops, moderate salt stress improves the fruit quality, increasing nutritional components but decreasing fruit yield. In the current Japanese market, such fruits are referred to as “fruit tomatoes” and are sold at a higher price compared with normally cultivated tomatoes because of their high Brix (sugar content) and excellent flavor. Previously, the mechanism underlying this phenomenon was referred to as a “concentration effect” because fruit enlargement was suppressed by limited water uptake as a result of salt stress. However, recent studies have suggested that, in addition to the “concentration effect,” certain metabolic and molecular genetic responses to salinity are also involved in the development of fruit tomatoes. Here, we introduce metabolic alterations in major fruit components such as sugars, amino acids, organic acids, and carotenoids in high-Brix fruit, and we describe the physiological changes observed in tomato plants exposed to salt stress. We also discuss possible molecular mechanisms underlying the production of fruit tomatoes.

Keywords

ADP-glucose pyrophosphorylase Amino acid Assimilate transport Fruit quality GABA Invertase Organic acid Salt stress Starch Tomato 

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Copyright information

© Springer Japan 2015

Authors and Affiliations

  1. 1.Organization for the Strategic Coordination of Research and Intellectual PropertiesMeiji UniversityKanagawaJapan
  2. 2.Graduate School of Life and Environmental SciencesUniversity of TsukubaIbarakiJapan

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