In:
Horticulture Research, Oxford University Press (OUP)
Kurzfassung:
Solanum habrochaites (SH), a closely wild related species of Alisa craig (AC), is an important germplasm resource for modern tomato breeding. Trichomes are developed from epidermal cells, producing a role in defense against insect attacking, and their secretions are of non-negligible value. Here, the glandular heads of type VI trichomes were clearly distinguished in AC and SH under cryo-scanning electron microscopy, such difference that allowed SH to secrete more anti-insect metabolites than AC. Pest preference experiments showed that aphids and mites preferred to feed near AC compared to SH. The integration analysis of transcriptomics and metabolomics data revealed that phenylpropanoid biosynthesis pathway was an important secondary metabolic pathway in plants, and SH secreted large amounts of phenylpropanoids and flavonoids than AC by up-regulating the expression of relevant genes in this pathway, which in turn resisted feeding by phytophagous insects. Notably, virus-induced silencing of the Sl4CLL6 not only decreased the expression of genes downstream of the phenylpropanoid biosynthesis pathway, SlHCT, SlCAD, and SlCHI, but also reduced resistance to mites in tomato. These findings provided new genetic resources for the synthesis of phenylpropanoid compounds and anti-insect breeding in Solanum habrochaites and new theoretical basis for the improvement of important traits in cultivated tomato.
Materialart:
Online-Ressource
ISSN:
2052-7276
Sprache:
Englisch
Verlag:
Oxford University Press (OUP)
Publikationsdatum:
2024
ZDB Id:
2781828-7
