Contribution of a phytotoxic compound to the allelopathy of<i>Ginkgo biloba</i>

Kato‐Noguchi, Hisashi; Takeshita, Sayaka

doi:10.4161/psb.26999

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…Perennial plants have potential to release allelopathic substances into their rhizosphere soil over several years through the root exudation and the decomposition process of plant litters. Those released compounds may be able to accumulate in the soil and disturb the germination and growth of other plant species [48][49][50][51][52][53][54]. M. glyptostroboides is a deciduous perennial conifer, and their fallen leaves accumulate on the soil and form a litter layer.…”

Section: Discussionmentioning

confidence: 99%

Allelopathy and Allelopathic Substances of Fossil Tree Species Metasequoia glyptostroboides

et al. 2021

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Metasequoia glyptostroboides Hu et W.C. Cheng is one of the oldest living conifer species, and it has remained unchanged for millions of years compared to its fossils from the Cretaceous period. The species are cultivated in the parks, gardens, and roadsides in many countries. We investigated the allelopathy and allelopathic substances in fallen leaves of M. glyptostroboides. An aqueous methanol extract of the fallen leaves inhibited the growth of cress (Lepidium sativum L.), lettuce (Lactuca sativa L.), alfalfa (Medicago sativa L.), Lolium multiflorum Lam., Phleum pretense L., and Vulpia myuros (L.) C.C.Gmel. The extract was then purified by several chromatographic steps, and two allelopathic substances were isolated and determined by spectral data to be (+)-rhododendrol and 9-epi-blumenol C. The compound inhibited the growth of cress and L. multiflorum. M. glyptostroboides is a deciduous perennial tree, and accumulation of its fallen leaves occur on the soil under the trees. Therefore, those allelopathic substances in the fallen leaves may be liberated into the rhizosphere soil during the decomposition process of fallen leaves and provide a competitive advantage for M. glyptostrob through the growth inhibition of competing plant species nearby. Therefore, M. glyptostroboides is allelopathic, and (+)-rhododendrol and 9-epi-blumenol C may be contribute to the allelopathy.

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Section: Discussionmentioning

confidence: 99%

Allelopathy and Allelopathic Substances of Fossil Tree Species Metasequoia glyptostroboides

et al. 2021

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“…The compound was also found in the litter under the ginkgo trees, and the concentration of the compound was greater in the litter collected near the ginkgo trees than that from farther away. 40 ) Therefore, the growth inhibitory activity of the ginkgo litter layer against other plant species may be higher the closer the litter is to the ginkgo trees, which provides ginkgo with the advantage of increased acquisition of water and nutrients because the growth of other plants are suppressed. Its related compound, nonanoic acid (pelargonic acid) exists as esters in the oil of Pelargonium species.…”

Section: Allelochemicals In Medicinal Plantsmentioning

confidence: 99%

Isolation and identification of allelochemicals and their activities and functions

Kato-Noguchi

2024

J. Pestic. Sci.

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Allelopathy is the interaction between donor plants and receiver plants through allelochemicals. According to a great number of publications, allelopathy may be involved in several ecological aspects such as the formation of monospecific stands and sparse understory vegetation for certain plant species. Allelopathy also contributes to the naturalization of invasive plant species in introduced ranges. Autotoxicity is a particular type of allelopathy involving certain compounds. Many medicinal plants have been reported to show relatively high allelopathic activity. We selected plant species that show high allelopathic activity and isolated allelochemicals through the bioassay-guided purification process. More than 100 allelochemicals, including novel compounds have been identified in some medicinal and invasive plants, plants forming monospecific stands, plants with sparse understory vegetation, and plants showing autotoxicity. The allelopathic activity of benzoxazinones and related compounds was also determined.

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“…In addition, SsWRKY18, SsWRKY40, and SsMYC2 show regulation in accumulating abietane (diterpene) in Salvia sclarea, which exhibits antimicrobial properties (Alfieri et al, 2018). Another example CjWRKY1 from Coptis japonica controls berberine biosynthesis (Kato-Noguchi and Takeshita, 2013).The regulatory roles of WRKY TFs production have been explored extensively. This information can be employed to engineer biotic stress resistance in transgenics.…”

Section: Wrky Tfmentioning

confidence: 99%

Regulation of the regulators: Transcription factors controlling biosynthesis of plant secondary metabolites during biotic stresses and their regulation by miRNAs

Kajla

Roy²,

Singh³

et al. 2023

Front. Plant Sci.

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Biotic stresses threaten to destabilize global food security and cause major losses to crop yield worldwide. In response to pest and pathogen attacks, plants trigger many adaptive cellular, morphological, physiological, and metabolic changes. One of the crucial stress-induced adaptive responses is the synthesis and accumulation of plant secondary metabolites (PSMs). PSMs mitigate the adverse effects of stress by maintaining the normal physiological and metabolic functioning of the plants, thereby providing stress tolerance. This differential production of PSMs is tightly orchestrated by master regulatory elements, Transcription factors (TFs) express differentially or undergo transcriptional and translational modifications during stress conditions and influence the production of PSMs. Amongst others, microRNAs, a class of small, non-coding RNA molecules that regulate gene expression post-transcriptionally, also play a vital role in controlling the expression of many such TFs. The present review summarizes the role of stress-inducible TFs in synthesizing and accumulating secondary metabolites and also highlights how miRNAs fine-tune the differential expression of various stress-responsive transcription factors during biotic stress.

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Contribution of a phytotoxic compound to the allelopathy ofGinkgo biloba

Cited by 8 publications

References 17 publications

Allelopathy and Allelopathic Substances of Fossil Tree Species Metasequoia glyptostroboides

Allelopathy and Allelopathic Substances of Fossil Tree Species Metasequoia glyptostroboides

Isolation and identification of allelochemicals and their activities and functions

Regulation of the regulators: Transcription factors controlling biosynthesis of plant secondary metabolites during biotic stresses and their regulation by miRNAs

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