Plants (2022) 11 (5 - 606)

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Hinako Miura, Ryota Ochi, Hisashi Nishiwaki, Satoshi Yamauchi, Xiaonan Xie, Hidemitsu Nakamura, Koichi Yoneyama and Kaori Yoneyama (2022)
Germination stimulant activity of isothiocyanates on Phelipanche spp.
Plants 11 (5 - 606)
Abstract: The root parasitic weed broomrapes, Phelipanche spp., cause severe damage to agriculture all over the world. They have a special host-dependent lifecycle and their seeds can germinate only when they receive chemical signals released from host roots. Our previous study demonstrated that 2-phenylethyl isothiocyanate is an active germination stimulant for P. ramosa in root exudates of oilseed rape. In the present study, 21 commercially available ITCs were examined for P. ramosa seed germination stimulation, and some important structural features of ITCs for exhibiting P. ramosa seed germination stimulation have been uncovered. Structural optimization of ITC for germination stimulation resulted in ITCs that are highly active to P. ramosa. Interestingly, these ITCs induced germination of P. aegyptiaca but not Orobanche minor or Striga hermonthica. P. aegyptiaca seeds collected from mature plants parasitizing different hosts responded to these ITCs with different levels of sensitivity. ITCs have the potential to be used as inducers of suicidal germination of Phelipanche seeds.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Hisashi Nishiwaki, Koichi Yoneyama

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Striga hermonthica (weed) Maize/corn (Zea mays) Sudan
Phelipanche aegyptiaca (weed) Cabbage (Brassica oleracea) Israel
Phelipanche aegyptiaca (weed) Tomato (Solanum lycopersicum) Israel
Phelipanche aegyptiaca (weed) Chickpea (Cicer arietinum) Israel
Phelipanche ramosa (weed) Rape/canola (Brassica napus) France
Orobanche minor (weed) Clover (Trifolium) Japan