Defensive Specialized Metabolites from the Latex of Euphorbia jolkinii
Luo,Shihong; Huang,Chunshuai; Hua,Juan; Jing,Shuxi; Teng,Linlin; Tang,Ting; Liu,Yan; Li,Shenghong
AbstractPlant latex is sequestered in laticiferous structures and exuded immediately from damaged plant tissues. The primary function of plant latex is related to defense responses to their natural enemies. Euphorbia jolkinii Boiss. is a perennial herbaceous plant that greatly threaten the biodiversity and ecological integrity of northwest Yunnan, China. Nine triterpenes (1-9), four non-protein amino acids (10-13) and three glycosides (14-16) including a new isopentenyl disaccharide (14), were isolated and identified from the latex of E. jolkinii. Their structures were established on the basis of comprehensive spectroscopic data analyses. Bioassay revealed that meta-tyrosine (10) showed significant phytotoxic activity, inhibiting root and shoot growth of Zea mays, Medicago sativa, Brassica campestris, and Arabidopsis thaliana, with EC50 values ranging from 4.41 +/- 1.08 to 37.60 +/- 3.59 mu g/mL. Interestingly, meta-tyrosine inhibited the root growth of Oryza sativa, but promoted their shoot growth at the concentrations below 20 mu g/mL. meta-Tyrosine was found to be the predominant constituent in polar part of the latex extract from both stems and roots of E. jolkinii, but undetectable in the rhizosphere soil. In addition, some triterpenes showed antibacterial and nematicidal effects. The results suggested that meta-tyrosine and triterpenes in the latex might function as defensive substances for E. jolkinii against other organisms.
KeywordPlant latex Euphorbia jolkinii meta-Tyrosine Phytotoxic activity Specialized metabolites PLANT LATEX META-TYROSINE DITERPENOIDS ROOTS ACID DERIVATIVES COMPONENTS GLYCOSIDE FRUIT
Subject AreaBiochemistry & Molecular Biology ; Environmental Sciences & Ecology
WOS IDWOS:000941075300001
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Luo,Shihong,Huang,Chunshuai,Hua,Juan,et al. Defensive Specialized Metabolites from the Latex of Euphorbia jolkinii[J]. JOURNAL OF CHEMICAL ECOLOGY,2023.
APA Luo,Shihong.,Huang,Chunshuai.,Hua,Juan.,Jing,Shuxi.,Teng,Linlin.,...&Li,Shenghong.(2023).Defensive Specialized Metabolites from the Latex of Euphorbia jolkinii.JOURNAL OF CHEMICAL ECOLOGY.
MLA Luo,Shihong,et al."Defensive Specialized Metabolites from the Latex of Euphorbia jolkinii".JOURNAL OF CHEMICAL ECOLOGY (2023).
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