Abstract
Most of the interspecific rootstocks (Lycopersicum esculentum × L. hirsutum) used in grafted Spanish tomato crops are resistant to Meloidogyne nematodes, but the 'Mi' resistance gene does not work well at high soil temperatures. Ralstonia solanacearum is a bacterial disease usual in tropical areas, but recently identified with low incidence in several European countries. This disease could be controlled by grafting tomato on Solanum torvum, which is also resistant to Meloidogyne. However, S. torvum and tomato have low grafting affinity, which could be improved using an intermediate rootstock. Some cultivars of eggplant have a relatively good affinity with tomato and complete affinity with S. torvum. In this study we compared two tomato cultivars (one resistant to Verticillium dalihae, Fusarium oxysporum v. lycopersici race 2 and Meloidogyne spp., and one non-resistant) grafted onto 'Beaufort' (Lycopersicum esculentum × L. hirsutum), 'Torvum Vigor' (Solanum torvum) and also with an intermediate grafting of eggplant ('Cristal') between tomato and S. torvum, with nongrafted plants as controls. This arrangement was carried out in two cropping cycles (winter-spring and summer-autumn). In both cycles, plants grafted onto S. torvum, both single or double grafted, yielded less than those grafted onto 'Beaufort' or nongrafted plants. In the spring cycle, no differences were found between single and double-grafted plants using S. torvum rootstocks, but in the autumn cycle double grafted plants had higher yields than the single grafted plants. The severity of nematode infections, in terms of reducing yields, and/or hypothetical infections of Ralstonia, will determine the utility of this technique in tomato production.
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Claims 3
Claim · model-written summary
Tomato grafted onto S. torvum yielded less than Beaufort-grafted and nongrafted plants in both cycles.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- grafted onto S. torvume0
- Outcome
- yieldede0
- Direction
- lesse0
- Comparator
- 'Beaufort' or nongrafted plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both cycles, plants grafted onto S. torvum, both single or double grafted, yielded less than those grafted onto 'Beaufort' or nongrafted plants.”
t0“TOMATO”
Claim · model-written summary
In spring, yields did not differ between single and double grafted tomato on S. torvum.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- double-grafted plantse0
- Outcome
- differencese0
- Direction
- no differencese0
- Comparator
- singlee0
- Setting
- spring cyclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the spring cycle, no differences were found between single and double-grafted plants using S. torvum rootstocks”
t0“TOMATO”
Claim · model-written summary
In autumn, double grafted tomato had higher yield than single grafted tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- double grafted plantse0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- single grafted plantse0
- Setting
- autumn cyclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the autumn cycle double grafted plants had higher yields than the single grafted plants.”
t0“TOMATO”
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