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- Title
Incidence of blossom-end rot in elongated tomato fruit.
- Authors
Riboldi, Lucas Baiochi; Araújo, Sabrina Helena da Cruz; de Freitas, Sérgio Tonetto; Camargo e Castro, Paulo Roberto de
- Abstract
Blossom-end rot (BER) is a physiological disorder that can affect 100% of the fruit crop depending on the genotype. Tomato varieties with elongated fruit usually have a greater susceptibility to BER than other varieties. To evaluate and identify the possible physiological and morphological characteristics related to the onset of BER development, four varieties of long-shape tomato fruit with different susceptibility to BER: 'San Marzano,' 'Banana Legs,' 'Roma,' and 'Mini-Roma' were examined. Our results show that 'San Marzano' and 'Banana Legs' (elongated fruit) had a higher incidence of BER and lower Ca2+ concentration in the distal fruit tissue. 'San Marzano' (the most elongated fruit) presented higher electrolyte leakage in the distal fruit tissue. By comparison, 'Roma' and 'Mini-Roma' (less elongated fruit) were less susceptible to BER and had a higher ratio for proximal/distal fruit Ca2+ and a lower distal cell-wall bound content of Ca2+. Additionally, xylem functionality (vessels transporting water and solutes) in the distal fruit tissue was also higher in these more-tolerant varieties. These results support the theory that total fruit content of Ca2+ is not the only factor determining fruit susceptibility to BER, but rather a balance between physiological and morphological factors that influence Ca2+ transport and allocation in the fruit.
- Subjects
TOMATO varieties; TOMATO diseases &; pests; TOMATOES; TOMATO farming; DISEASE susceptibility; PHYSIOLOGY
- Publication
Botany, 2018, Vol 96, Issue 10, p663
- ISSN
1916-2790
- Publication type
Article
- DOI
10.1139/cjb-2018-0021