Selection of tomato genotypes with high resistance to Tetranychus evansi mediated by glandular trichomes

Marinke, Luana de Souza; Resende, Juliano Tadeu Vilela de; Hata, Fernando Teruhiko; Dias, Diego Munhoz; Oliveira, L. V.; Ventura, Maurício Ursi; Zanin, Daniel Suek; Filho, Renato Barros de Lima

doi:10.1007/s12600-022-00984-6

Cited by 6 publications

(1 citation statement)

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“…The selection of tomato plants with higher densities of glandular trichomes has shown to be an effective criterion to obtain superior resistance to insect pests. This has been widely proven in resistance to spider mites ( Tetranychus urticae , Andrade et al ., 2017; Rakha et al ., 2017a; de Souza Marinke et al ., 2022), whitefly ( Bemisia tabaci ,Rakha et al ., 2017b; Lucatti et al ., 2013), thrips ( Frankliniella occidentalis ,Escobar-Bravo et al ., 2017), and cabbage looper caterpillar ( Trichoplusia ni ,Mymko and Avila-Sakar, 2019). These studies generally attribute the insect pest resistance to the excretion of acylsugars by the tip of glandular trichome type IV, thereby acting as a biopesticide.…”

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confidence: 99%

Leaf trichome diversity, acylsugar concentration, and their relationships to leaf area inSolanum galapagense

Henzler

Khazaei

2022

Preprint

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Glandular trichomes are physical and chemical barriers used by some tomato wild relatives to confer resistance against insect pests and diseases transmitted by them. Solanum galapagense has been identified as one of the potential sources of insect pest resistance. The present study aimed to examine the trichome diversity and acylsugar concentration of 26 accessions of S. galapagense along with one cultivated tomato (S. lycopersicum) and one cherry tomato (S. l. cerasiforme) cultivar. The results revealed large genetic variation among S. galapagense accessions for all studied traits. The S. galapagense accessions had significantly higher trichome types IV on the adaxial and abaxial surfaces of the leaf and greater acylsugar concentration but smaller leaflet area than cultivated tomato. The selected cherry tomato line represents greater trichome type IV and acylsugar than other groups. The acylsugar concentration was positively associated with trichome type IV but negatively associated with trichome type V on both leaf surfaces. Leaflet area was negatively associated with trichome IV density and acylsugar concentration. Analysis of DNA markers revealed the presence of two previously identified whitefly-resistance alleles in S. galapagense accessions. This study will support breeding programs aiming to improve insect pest resistance in tomato cultivars using crop wild relatives.

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