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Ecological Relevance of the Major Allelochemicals in Lycopersicon Esculentum Roots and Exudates

Ecological Relevance of the Major Allelochemicals in Lycopersicon Esculentum Roots and Exudates

Carlos Rial, Elisabeth Gómez, Rosa M Varela, José M G Molinillo, Francisco A Macías

J Agric Food Chem. 2018 May 9;66(18):4638-4644.

PMID: 29673247

Abstract:

Stigmasterol, bergapten, and α-tomatine were isolated from tomato roots. The preliminary phytotoxic activities of stigmasterol and α-tomatine were evaluated in a wheat-coleoptile bioassay, and α-tomatine was more active than stigmasterol. To confirm its phytotoxic activity, α-tomatine was tested on Lactuca sativa and two weeds ( Lolium perenne and Echinochloa crus-galli), and it was active in all cases. The stimulatory activities of α-tomatine and stigmasterol on parasitic-plant germination were also evaluated, and α-tomatine was found to be active on Phelipanche ramosa, a parasitic plant of tomato. α-Tomatine was identified in root exudates by LC-MS/MS. This confirms that α-tomatine is exuded by roots into the environment, where it could act as both an allelochemical and a stimulator of P. ramosa, a parasitic plant of tomato.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP17406450	Tomatine		17406-45-0	Price

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