(Homo)glutathione Deficiency Impairs Root-knot Nematode Development in Medicago truncatula

Root-knot nematodes (RKN) are obligatory plant parasitic worms that establish and maintain an intimate relationship with their host plants. During a compatible interaction, RKN induce the redifferentiation of root cells into multinucleate and hypertrophied giant cells essential for nematode growth and reproduction. These metabolically active feeding cells constitute the exclusive source of nutrients for the nematode. Detailed analysis of glutathione (GSH) and homoglutathione (hGSH) metabolism demonstrated the importance of these compounds for the success of nematode infection in Medicago truncatula. We reported quantification of GSH and hGSH and gene expression analysis showing that (h)GSH metabolism in neoformed gall organs differs from that in uninfected roots. Depletion of (h)GSH content impaired nematode egg mass formation and modified the sex ratio. In addition, gene expression and metabolomic analyses showed a substantial modification of starch and γ-aminobutyrate metabolism and of malate and glucose content in (h)GSH-depleted galls. Interestingly, these modifications did not occur in (h)GSH-depleted roots. These various results suggest that (h)GSH have a key role in the regulation of giant cell metabolism. The discovery of these specific plant regulatory elements could lead to the development of new pest management strategies against nematodes

Involvement of (h)GSH in the interaction between Medicago truncatula and the root-knot nematode Meloidogyne incognita

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Implication du tréhalose dans l’adaptation de l’état osmotique d’une galle induite chez Medicago truncatula par le nématode à galle Meloidogyne incognita.

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Involvement of (h)GSH in the interaction between Medicago truncatula and the root-knot nematode Meloidogyne incognita

0info:eu-repo/semantics/nonPublishe

Involvement of (h)GSH in the interaction between Medicago truncatula and the root-knot nematode Meloidogyne incognita

0info:eu-repo/semantics/nonPublishe

Involvement of glutathione and homoglutathione during the interaction between Medicago truncatula and the root-knot nematode Meloidogyne incognita

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Glutathione and plant response to the biotic environment.

Glutathione (GSH) is a major antioxidant molecule in plants. It is involved in regulating plant development and responses to the abiotic and biotic environment. In recent years, numerous reports have clarified the molecular processes involving GSH in plant-microbe interactions. In this review, we summarize recent studies, highlighting the roles of GSH in interactions between plants and microbes, whether pathogenic or beneficial to plants.info:eu-repo/semantics/publishe

Does PtaRHE1, a poplar RING-H2 protein, play a role in water conduction through ABA signaling?

RING (REALLY INTERESTING NEW GENE) proteins with E3 ligase activity are largely represented in plants. They have been shown to play important roles in the regulation of many biological processes by recognizing target proteins for ubiquitination. PtaRHE1, encoding a poplar RING-H2 domain-containing protein with E3 ligase activity has been previously shown to be expressed during the establishment of secondary vascular system in poplar. In the present report, we demonstrate that the expression of PtaRHE1 and the accumulation of its corresponding protein are modulated by the relative atmospheric and soil humidity and by abscisic acid. Overall, the integrated data are discussed within a working model highlighting a plausible function of PtaRHE1 in the signaling and/or in the regulation of water status in poplar.JOURNAL ARTICLESCOPUS: ar.jinfo:eu-repo/semantics/publishe

New transformation technologies for trees

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