Allelochemicals Identified From Sweet Potato (Ipomoea batatas) and Their Allelopathic Effects on Invasive Alien Plants

Shen, S. C.; Ma, Guangzong; Xu, Gaofeng; Li, Diyu; Jin, Guimei; Yang, Shaosong; Clements, David R.; Chen, Aidong; Wen, Lina; Zhang, Fudou; Ye, Min

doi:10.3389/fpls.2022.823947

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…That was the adaptive mechanism of A. philoxeroides under allelopathic stress, demonstrating that allelochemicals have a stressful effect to some extent 60 . The allelopathic substances of linoleic acid, palmitic acid and ethyl palmitate in sweet potato aqueous extracts increased CAT and POD enzyme activities and decreased SOD enzyme activities in A. philoxeroides , which is consistent with the above findings 61 .…”

Section: Discussionsupporting

confidence: 89%

Effects of 13C isotope-labeled allelochemicals on the growth of the invasive plant Alternanthera philoxeroides

Hua,

Xie,

et al. 2023

Sci Rep

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The secondary metabolites of indigenous plants have significant allelopathic inhibitory effects on the growth and development of invasive alien plants. Methyl palmitate (MP) and methyl linolenate (ML) were used as exogenous allelopathic substances. The research investigated the differences of inhibitory effects of MP and ML on the growth of seedlings of Alternantheraphiloxeroides, and calculated their morphological characteristics, biomass, physiological indicators and the response index (RI). The synthetical allelopathic index (SE) of 1 mmol/L MP was the smallest (− 0.26) and the allelopathic inhibition was the strongest; therefore, it was selected as a 13C-labeled allelochemical. The distribution of 1 mmol/L MP in different parts of A.philoxeroides and the correlation between the biomass ratios of roots, stems and leaves and the 13C content were studied by 13C stable isotope tracing experiments. Atom percent excess (APE) between roots, stems and leaves of A.philoxeroides treated with 1 mmol/L MP were significantly different in terms of magnitude, with leaves (0.17%) > roots (0.12%) > stems (0.07%). The root, stem and leaf biomass ratios of invasive weeds had great significant positive correlation with 13C content (p < 0.01, R2 between 0.96 and 0.99). This current research provides a new idea and method for the control of A.philoxeroides, but large-scale popularization remains to be studied.

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Section: Discussionsupporting

confidence: 89%

Effects of 13C isotope-labeled allelochemicals on the growth of the invasive plant Alternanthera philoxeroides

Hua,

Xie,

et al. 2023

Sci Rep

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“…Accordingly, methyl palmitate is the most dominant compound detected in the hexane extract, which has been previously reported as an allelochemical with suppression against chlorophyll and antioxidant enzymes (superoxide and dismutase peroxidase) of weeds [55]. In addition, palmitic acid, the second most abundant compound detected in hexane extract, is a well-known weed inhibitor, which exhibited prevention on superoxide dismutase and chlorophylls a and b of weeds [56][57][58]. Other fatty acids identified in hexane extracts, including 9.12-octadecadienoic acid, methyl ester, and stearic acid have been reported as allelochemicals in previous studies [59][60][61].…”

Section: Discussionmentioning

confidence: 88%

Assessment of Allelopathic Activity of Arachis pintoi Krapov. & W.C. Greg as a Potential Source of Natural Herbicide for Paddy Rice

Thang,

Vien,

Anh

et al. 2023

Applied Sciences

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Pinto peanut (Arachis pintoi Krapov. & W.C. Greg.) is an herbaceous perennial plant which belongs to the Leguminosae family. This plant is well known for its use as a cover crop, but little information is available on the allelopathic potential of this legume. Therefore, this study aimed to explore the allelopathic effects of A. pintoi under various screening conditions and to analyze its potential allelochemicals using gas chromatography–mass spectrometry (GC-MS). In laboratory bioassays, aqueous extracts of A. pintoi powder exerted the average inhibition of the growth of Echinochloa crus-galli (55.1%), Oryza sativa (77.1%), and Vigna radiata (60.1%), respectively, of which the root lengths of the tested plants were the most suppressed. In greenhouse experiments, E. crus-galli was inhibited by 63.4% at 200 g/m2 of A. pintoi dried powder application. In field trials, A. pintoi also significantly reduced the growth of E. crus-galli and natural weeds. By incorporating a dose of 200 g/m2, the average inhibition of E. crus-galli was 43.9%, the dry weight of natural paddy weeds was 43.1%, and rice yield was simultaneously increased by 35%. The growth inhibitions of weeds and tested plants were proportional to the doses of A. pintoi applied and varied with the tested plant species. Among three different solvent extracts (methanol, hexane, and ethyl acetate), the hexane extract exerted the highest suppression against the growth of E. crus-galli and L. sativa by IC50 against root and shoot growth = 4.08 and 8.4 mg/mL and 1.7 and 1.54 mg/mL, respectively, followed by ethyl acetate extract, while the least effective was methanol extract. From those extracts, a total of 35 substances were detected by GC-MS analyses, including 14 newly identified constituents, such as phenolic acids, stearic acid, palmitic acid, fatty acids, pyranones, and benzofurans, which may be responsible for the herbicidal effects of A. pintoi. This study suggests that A. pintoi may be used as a source of bioherbicide to minimize the dependency on harmful synthetic herbicides and enhance rice yield.

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“…Meanwhile, the premature germination of Mangifera indica seeds results from a reduction in long-chain fatty acid synthesis [54]. The exogenous application of palmitic and linoleic acid monomers significantly inhibited the germination of Lolium multiflorum and Phalaris minor seeds, and the inhibitory ability increased with increasing concentration [55]. In this study, the inhibitory effects of the seed coat extract and endosperm extract of P.hexandrum seed on the germination of oilseed rape seeds at different stages of stratification were consistent with the changes in contents of palmitic acid and linoleic acid in their corresponding parts.…”

Section: Plos Onementioning

confidence: 99%

Dormancy release of seeds of Podophyllum hexandrum Royle accompanied by changes in phytochemicals and inorganic elements

Jiu,

Chen,

et al. 2023

PLoS ONE

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Podophyllum hexandrum Royle is an alpine medicinal plant of considerable importance, and its seed dormancy severely inhibits population renewal. Although cold stratification can break dormancy to a certain extent, the migration and accumulation of phytochemicals and inorganic elements in the seeds during dormancy release and their functions remain unclear. Changes in phytochemicals and inorganic elements in different seed parts were analyzed during dormancy. The key differential phytochemicals and inorganic elements were screened and their association with dormancy release and their roles in dormancy release were explored. The results showed that dormancy release may have occurred following the decrease in palmitic acid and linoleic acid content in the seeds and the increase in 2,3-dihydro-3,5-dihydro-6-methyl-4 (h)-pyran-4-one content in the endosperm. Meanwhile, 6-propyltridecane and hexadecane in the seed coat may enhance the water permeability of seeds to speed up germination. Mg may migrate from the seed coat to the endosperm and seed embryos, whereas Co may migrate from the seed embryo to the seed coat. Ca, Mn, Mg, and Co are involved in various physiological metabolic processes, which may facilitate the dormancy release of P. hexandrum seeds. These findings have enhanced our understanding of the mechanisms of dormancy release in P. hexandrum seeds and can serve as a reference for the development of more effective dormancy-breaking techniques for the conservation of this endangered medicinal plant.

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Allelochemicals Identified From Sweet Potato (Ipomoea batatas) and Their Allelopathic Effects on Invasive Alien Plants

Cited by 11 publications

References 38 publications

Effects of 13C isotope-labeled allelochemicals on the growth of the invasive plant Alternanthera philoxeroides

Effects of 13C isotope-labeled allelochemicals on the growth of the invasive plant Alternanthera philoxeroides

Assessment of Allelopathic Activity of Arachis pintoi Krapov. & W.C. Greg as a Potential Source of Natural Herbicide for Paddy Rice

Dormancy release of seeds of Podophyllum hexandrum Royle accompanied by changes in phytochemicals and inorganic elements

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