Solanum linnaeanum Leaves: Chemical Profiling of VOCs and Effects on Seed Germination and Early Growth of Monocots and Dicots

Abstract

Some Solanaceae plants are a rich source of sesquiterpenoid phytoalexins with allelopathic potential. Powder and aqueous extract obtained from the leaves of Solanum linnaeanum Hepper & P.M.L. Jaeger were used to treat the seeds of three target species (Lolium multiflorum Lam., Sinapis alba L. and Trifolium incarnatum L.). Both matrices were evaluated along with untreated controls to determine their toxicity on germination and seedling growth. The results revealed that the pre‐emergence treatments were able to be very effective against all three species in the filter paper test by inhibiting the germination up to 100 %. The effectiveness was reduced by the interaction with soil. Despite this, significant data were obtained, albeit different according to the applied matrix. In general, L. multiflorum was the most sensitive to both the action of the leaf powder and aqueous extract while S. alba was found to be the most resistant to powder activity and T. incarnatum had the strongest response to the extract. For the first time, SPME‐GC/MS technique was used to characterize the volatile chemical profile of S. linnaeanum leaves. The analyses highlighted the presence of different classes of compounds including terpenoids and sesquiterpenoids potentially useful in the fight against noxious plants both in natural and cultivated ecosystems.

Impact of Achillea moschata Wulfen on germination and growth of weed species Echinochloa oryzoides (Ard.) Fritsch and Lolium multiflorum Lam

“…Sowing in Petri dishes (90 mm) was carried out under a biological hood with vertical laminar flow. The seeds of each target species (10) were placed on two sheets of sterilized filter paper sprinkled with 0.25 g of coarsely chopped A. moschata and subsequently soaked with 5 ml of distilled water. Two runs with three replicates each were performed: E. oryzoides (N = 10x3x2) and L. multiflorum (N = 10x3x2).…”

“…The oven GC was equipped with a Varian Factor Four VF-1 capillary column (60 m length x 0.32 mm ID and 1.0 μm film thickness). The operative GC-MS conditions following Garzoli et al (2022) [10].…”

Influence of phytohormones on seed germination of Solanum linnaeanum

“…Similarly, food consumption in Schistocera gregaria Forsskål, 1775 fifth instar larva was reduced as a result of the eating lettuce soaked in various extracts of S. linnaeanum fruit peel (Zouiten et al 2006). Garzoli et al (2022) detected allelopathic potential in leaf extract of S. linnaeanum to inhibit seed germination of some noxious plants. Furthermore, there are reports that S. linnaeanum is a compatible rootstock for grafting eggplant as it was obtained from seeds, which is short-term to overcome infestation of pathogens and unfavorable conditions in soil (Villeneuve et al 2016).…”