Triazolide strigolactone mimics as potent selective germinators of parasitic plant <i>Phelipanche ramosa</i>

Dvořáková, Marcela; Hýlová, Adéla; Soudek, Petr; Petrová, Šárka; Spíchal, Lukáš; Vaněk, Tomáš

doi:10.1002/ps.5330

Cited by 8 publications

(8 citation statements)

References 28 publications

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“…Indeed, we showed that parasitic seeds of genetic group 1 were highly sensitive to strigolactone synthetic enantiomers as they were able to germinate with up to 10 -12 M of (+)-GR24 and (-)-2’- epi -GR24. This was consistent with previous work that showed that P. ramosa seeds from oilseed rape plots were ten to hundred times more sensitive to (±)-GR24 and to different conformations of GR24 than seeds from hemp plots ( Boyer et al., 2014 ; Dvorakova et al., 2018 ; Dvorakova et al., 2019 )⁠. Also, seeds from oilseed rape and hemp plots perceived at a lower concentration the (+)-GR24 and (-)-2’- epi -GR24, and were less sensitive to GR24 with non-natural conformation ( de Saint Germain et al., 2019 )⁠.…”

Section: Discussionsupporting

confidence: 93%

Populations of the Parasitic Plant Phelipanche ramosa Influence Their Seed Microbiota

et al. 2020

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Seeds of the parasitic weed Phelipanche ramosa are well adapted to their hosts because they germinate and form haustorial structures to connect to roots in response to diverse host-derived molecular signals. P. ramosa presents different genetic groups that are preferentially adapted to certain hosts. Since there are indications that microbes play a role in the interaction especially in the early stages of the interaction, we studied the microbial diversity harbored by the parasitic seeds with respect to their host and genetic group. Twenty-six seed lots from seven cropping plots of three different hosts—oilseed rape, tobacco, and hemp—in the west of France were characterized for their bacterial and fungal communities using 16S rRNA gene and ITS (Internal transcribed spacer) sequences, respectively. First seeds were characterized genetically using twenty microsatellite markers and phenotyped for their sensibility to various germination stimulants including strigolactones and isothiocyanates. This led to the distinction of three P. ramosa groups that corresponded to their host of origin. The observed seed diversity was correlated to the host specialization and germination stimulant sensitivity within P. ramosa species. Microbial communities were both clustered by host and plot of origin. The seed core microbiota was composed of seventeen species that were also retrieved from soil and was in lower abundances for bacteria and similar abundances for fungi compared to seeds. The host-related core microbiota of parasitic seeds was limited and presumably well adapted to the interaction with its hosts. Two microbial candidates of Sphingobacterium species and Leptosphaeria maculans were especially identified in seeds from oilseed rape plots, suggesting their involvement in host recognition and specialization as well as seed fitness for P. ramosa by improving the production of isothiocyanates from glucosinolates in the rhizosphere of oilseed rape.

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Section: Discussionsupporting

confidence: 93%

Populations of the Parasitic Plant Phelipanche ramosa Influence Their Seed Microbiota

et al. 2020

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“…Analogues of strigolactone have been synthesized, such as GR24 and Nijmegen 1, which can effectively induce the germination of broomrape seeds (Wigchert et al 1999 ). However, their poor stability in soil and the high cost of producing these compounds limit their use in agricultural production (Babiker et al 1987 ; Dvorakova et al 2019 ) synthesized simple and stable strigolactone mimics with selective activity against Phelipanche ramosa . Kuruma et al ( 2021 ) discovered a structurally hybrid compound that can induce spontaneous germination and inhibit subsequent radical growth.…”

Section: Introductionmentioning

confidence: 99%

Herbicidal secondary metabolites from Bacillus velezensis JTB8-2 against Orobanche aegyptiaca

Luo

et al. 2022

AMB Expr

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Egyptian broomrape (Orobanche aegyptiaca) is a parasitic plants that cause significant losses to important crops. The effective methods for controlling this weed are rare. Biological control could be one of the possible strategies to tackle these weeds efficiently. In this work, a bacteria strain Bacillus velezensis JTB8–2 was proven to possesse biological control functions against broomrapes in both pot and field experiments. Four secondary metabolites (1–4) were isolated from the B. velezensis JTB8–2 crude extracts, and all of them could inhibit the germination of O. aegyptiaca seeds at concentrations from 0.5 mM to 4 mM. Their structures were further elucidated by Nuclear Magnetic Resonance (NMR) and Mass Spectrometry (MS) analysis. Among the isolated compounds, 1 and 2 exhibited the strongest herbicidal activity with 100% inhibition rate against the germination of O. aegyptiaca seeds at 4 mM, and thus had great potential in the development of new herbicidal products to control O. aegyptiaca in the future.

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“…Because the requisite temperature for seed germination of the broomrapes is normally not higher than that of Striga spp. seeds, the broomrapes can survive in the most subtropical and temperate zones including Asia, Australia, Mediterranean, and eastern Europe, besides Africa. , As far as we know, there are 11 species of Orobanche distributed in China, and O. cumana and O.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is still impractical in the developing countries considering the high expense of this methodology. Moreover, this method was also shown to be less effective to some types of the broomrapes …”

Section: Introductionmentioning

confidence: 99%

“…seeds, the broomrapes can survive in the most subtropical and temperate zones including Asia, Australia, Mediterranean, and eastern Europe, besides Africa. 6,7 As far as we know, there are 11 species of Orobanche distributed in China, and O. cumana and O. aegyptiaca were found to be among the most harmful species toward the crops. 7,8 In the Xinjiang Uygur Autonomous Region of China, the infestation of O. aegyptiaca has caused 20−70% yield loss of melon and watermelon.…”

Section: ■ Introductionmentioning

confidence: 99%

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Strigolactone Analogues Derived from Dihydroflavonoids as Potent Seed Germinators for the Broomrapes

Kang

Pang

et al. 2020

J. Agric. Food Chem.

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The broomrapes (Orobanche and Phelipanche spp.) and witchweeds (Striga spp.) are a class of parasitic weeds, which are distributed widely in the tropical, subtropical, and temperate areas of the globe. Since they have completely consistent lifecycles with the host plants, it is difficult to control them selectively through using the conventional herbicides. Inducing suicidal germination of these weed seeds by small molecular signaling agents proved to be a promising strategy for the management of parasitic weeds. As a class of naturally occurring terpenoid metabolites, strigolactones (SLs) show significant biological activities including stimulation germination of weed seeds, inhibition of shoot-branching, and so on. However, the widespread application of these natural SLs is greatly limited by their extremely low natural abundance and complex molecular structures. Design and synthesis of the simplified analogues as natural SLs alternatives provide a viable avenue for the efficient control of these parasitic weeds. We herein disclose the development of a novel class of SLs analogues derived from dihydroflavonoids as potent seed germinators of parasitic weeds. It was shown that one of them displayed a higher potential toward the seed germination of the broomrapes than the positive control GR24. The structure−activity relationship of these SLs analogues was further validated on the basis of the binding affinity experiment to strigolactone receptor protein HTL7 by using a YLG fluorescent probe method.

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Triazolide strigolactone mimics as potent selective germinators of parasitic plant Phelipanche ramosa

Cited by 8 publications

References 28 publications

Populations of the Parasitic Plant Phelipanche ramosa Influence Their Seed Microbiota

Populations of the Parasitic Plant Phelipanche ramosa Influence Their Seed Microbiota

Herbicidal secondary metabolites from Bacillus velezensis JTB8-2 against Orobanche aegyptiaca

Strigolactone Analogues Derived from Dihydroflavonoids as Potent Seed Germinators for the Broomrapes

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