Palmitic acid mediated change of rhizosphere and alleviation of Fusarium wilt disease in watermelon

Ma, Kexin; Kou, Jinming; Rahman, Muhammad Khashi u; Du, Wenting; Liang, Xingyu; Wu, Fengzhi; Li, Wenhui; Pan, Kaiwen

doi:10.1016/j.sjbs.2021.03.040

Cited by 33 publications

(18 citation statements)

References 48 publications

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“…PA is also widely found in other crops such as beans, cotton, sunflowers, wheat, rape, and pepper ( Lukonge et al, 2007 ; Zhao et al, 2019 ). This compound can inhibit plant growth and change SOD, POD activity and proline content of some plants ( Zou et al, 2014 ; Wang et al, 2021 ), and change the soil nutrient and the rhizosphere microbial composition ( Ma et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

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

Shen

et al. 2022

Front. Plant Sci.

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Sweet potato [Ipomoea batatas (L.) Lam] is grown as important cash and food crop worldwide and has been shown to exhibit allelopathic effects on other plants. However, its metabolome has not been studied extensively, particularly with respect to the production of phytotoxic bioactive secondary products. In this study, the chemical composition of petroleum ether extract of sweet potato was characterized, and the morphological and physiological effects of some individual components against four invasive alien weeds Bidens pilosa L., Galinsoga parviflora Cav., Lolium multiflorum Lam., and Phalaris minor Retz. were determined. Twenty-one components were identified by GS-MS, constituting 96.08% of petroleum ether extract in sweet potato. The major components were palmitic acid (PA) (17.48%), ethyl linoleate (EL) (13.19%), linoleic acid (LA) (12.55%), ethyl palmitate (EP) (11.77%), ethyl linolenate (ELL) (8.29%) oleic acid (5.82%), ethyl stearate (4.19%), and 3-methylphenol acetate (3.19%). The five most abundant compounds exhibited strong inhibition activity against the four invasive weeds tested. The highest inhibition rates were seen for LA, followed by PA and EP, respectively. Catalase (CAT), malondialdehyde (MDA), and peroxidase (POD) content of L. multiflorum were increased by the three allelochemicals, i.e., LA, PA and EP, but superoxide dismutase (SOD), chlorophyll-a and chlorophyll-b levels declined. Overall, the combined impact of all five compounds could be quite effective in suppressing the invasive weeds of concern.

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Section: Discussionmentioning

confidence: 99%

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

Shen

et al. 2022

Front. Plant Sci.

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“…Fatty acids are associated in the early interactions between plants and pathogens, triggering a form of immunity that may help resist infection and colonization by pathogens 70 . cS increased palmitic acid by 1.4, 2.0 and 2.1-fold over the control, nS, and bS, and increased palmitic amide, a primary fatty acid amide derived from palmitic acid that has been reported to alleviate Fusarium disease in watermelon and tomato, by 1.7-fold over bS 71,72 . Although jasmonic acid and methyl jasmonate were unaffected treatment, a signi cant increase in the precursor 12-oxo-Phytodienoic acid (12-OPDA) was induced by cS (2.9-fold) compared to controls.…”

Section: Metabolomicsmentioning

confidence: 89%

Nanoscale-specific bioassimilation of sulfur: Time and coating specific modulation of transcriptomic and metabolomic pathways in diseased tomato

Wang

Deng

Sharma

et al. 2021

Preprint

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Nanoscale sulfur was investigated as a multi-functional agricultural amendment to simultaneously enhance crop nutrition and suppress disease damage. Pristine (nS) and stearic acid coated (cS) sulfur nanoparticles were added to soil (0, 100, or 200 mg/L) that was planted with tomato (Solanum lycopersicum) and infested with the Fusarium wilt pathogen. Bulk sulfur (bS), ionic sulfate (iS), and healthy controls were included. In two greenhouse experiments, measured endpoints included time-dependent agronomic and photosynthetic parameters, disease severity/suppression, and a range of mechanistic biochemical and molecular endpoints, including the expression of 13 genes related to two S bioassimilation pathways and pathogenesis-response, and tissue-specific metabolomic profiles. The impact of treatment on the rhizosphere bacterial microbiome was also evaluated. Disease reduced tomato biomass by up to 87%, but amendment with nS and cS significantly reduced disease progress by 54 and 56%, respectively, compared to the infested controls. Increased S accumulation was evident in plant roots and leaves, independent of S type. Molecular analysis revealed particle size and coating-specific impacts on the plants. For nS and cS, two-photon microscopy and time-dependent gene expression data revealed a nanoscale specific elemental S bioassimilation pathway within the plant tissues. These findings correlated well with detailed metabolomic profiling of plant tissues at 4, 8, and 16 d, which exhibited increased disease resistance and plant immunity related metabolites with nanoscale treatment. The data also demonstrate a time-sensitive physiological window whereby nanoscale stimulation of plant immunity will be effective. An analysis of the rhizosphere soil bacterial community revealed minimal impacts from S soil treatments. These findings provide significant mechanistic insight into non-metal nanomaterial-based suppression of plant disease, and significantly advance efforts to develop sustainable nano-enabled agricultural strategies to increase food production.

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“…Nevertheless, the effects of GM crops on the rhizosphere microbial community are instinct. However, it depends on the spectrum of activity of the transgene protein, the change in root exudation profile and the nature and toxicity of altered metabolites, 43 Sun et al, 2016; 66 , 67 Since examining the nature of all the altered compounds and their level of toxicity on the soil bacterial community was quite troublesome, we screened out the KEGG pathways involving those altered metabolites at different stages. We found that almost third quarter of KEGG pathways with altered metabolites was related to metabolism only, and none of them was found involved in plant–microbe interaction-related pathways such as bacterial chemotaxis, 68 two-component system, 69 biofilm formation (Bonlan, 70 2001), quorum sensing, 71 MAPK signaling 72 and plant hormone signal transduction.…”

Section: Discussionmentioning

confidence: 99%

Comparison of genetically modified insect-resistant maize and non-transgenic maize revealed changes in soil metabolomes but not in rhizosphere bacterial community

et al. 2022

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The deliberate introduction of the beneficial gene in crop plants through transgenic technology can provide enormous agricultural and economic benefits. However, the impact of commercialization of these crops on the ecosystem particularly on belowground soil biodiversity is still uncertain. Here, we examined and compared the effects of a non-transgenic maize cultivar and an insect-resistant transgenic maize cultivar genetically engineered with cry1Ah gene from Bacillus thuringiensis , on the rhizosphere bacterial community using 16S rDNA amplicon sequencing and soil metabolome profile using UPLC/MS analysis at six different growth stages. We found no significant differences in bacterial community composition and diversity at all growth stages between the two cultivars. The analysis of bacterial beta-diversity showed an evident difference in community structure attributed to plant different growth stages but not to the plant type. In contrast, the soil metabolic profile of transgenic maize differed from that of the non-transgenic plant at some growth stages, and most of the altered metabolites were usually related to the metabolism but not to the plant-microbe interaction related pathways. These results suggest that genetic modification with the cry1Ah gene-altered maize soil metabolism but had no obvious effect on the rhizosphere bacterial community.

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Palmitic acid mediated change of rhizosphere and alleviation of Fusarium wilt disease in watermelon

Cited by 33 publications

References 48 publications

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

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

Nanoscale-specific bioassimilation of sulfur: Time and coating specific modulation of transcriptomic and metabolomic pathways in diseased tomato

Comparison of genetically modified insect-resistant maize and non-transgenic maize revealed changes in soil metabolomes but not in rhizosphere bacterial community

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