Photosynthate partitioning and morphoanatomical aspects of photomorphogenic mutants of tomato

Authors

  • Hyrandir Cabral de Melo Universidade Federal de Goiás
  • Elvis Josefer Constantino Universidade Federal de Mato Grosso
  • Renato Corrêa Cacho Universidade Federal de Mato Grosso
  • Rogério Falleiros Carvalho Universidade Estadual Paulista Júlio de Mesquita Filho

Keywords:

au, hp1, Micro-Tom, photomorphogenesis, Solanum lycopersicum L.

Abstract

The aim of this study was to analyze photosynthate partitioning in tomato photomorphogenic mutants at the ends of the vegetative (40 days after emergence [DAE]) and reproductive (69 DAE) stages and to determine its interaction with morphoanatomical aspects. The mutants aurea (au), phytochrome-deficient, high pigment-1 (hp1), light-exaggerated response, were studied along with the non-mutant Micro-Tom (MT) cultivar. The plants were analyzed at 40 and 68 DAE to identify photosynthate source organs and tissues as well as the target organs of remobilized photosynthate during the reproductive stage. The plants were evaluated for their internal and external morphology as well as the percentage of dry mass of their organs. Photosynthate allocation in the hp1 mutant occurred primarily in the roots and leaves, and allocation in the au mutant occurred primarily in fruits. The au mutant showed a high capacity for photosynthate remobilization to fruit during the reproductive stage, and the predominant sources of these remobilized photosynthates were the leaf spongy parenchyma, the root vascular cylinder and the marrow stem.

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Published

2013-10-03

How to Cite

MELO, H.C. de, CONSTANTINO, E.J., CACHO, R.C. and CARVALHO, R.F., 2013. Photosynthate partitioning and morphoanatomical aspects of photomorphogenic mutants of tomato . Bioscience Journal [online], vol. 30, no. 2. [Accessed25 May 2022]. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/18031.

Issue

Section

Agricultural Sciences