Prunus

Publication Title: 
Journal of Nematology

The effects of Pratylenchus vulnus on rootstocks of eight commonly used Prunus spp. and one Pyrus communis were evaluated under greenhouse conditions during a 15-month period. In a first experiment, two almonds (Moncayo and Garrigues), one peach (GF-305), and two peach-almond hybrids (GF-677 and Adafuel) inoculated with 2,000 nematodes per plant proved to be good hosts of P. vulnus. Highest (P < 0.05) numbers of nematodes per gram of fresh root weight were recovered from Adafuel and GF-677.

Author(s): 
Pinochet, J.
Verdejo-Lucas, S.
Marull, J.
Publication Title: 
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

Prunus species express different ranges and levels of resistance to the root-knot nematodes (RKN) Meloidogyne spp. In Myrobalan plum ( Prunus cerasifera), the dominant Ma gene confers a high-level and wide-spectrum resistance to the predominant RKN, Meloidogyne arenaria, Meloidogyne incognita, Meloidogyne javanica and the isolate Meloidogyne sp. Florida which overcomes the resistance of the Amygdalus sources. In Japanese plum ( Prunus salicina), a similar wide-spectrum dominant resistance gene, termed R(jap), has been hypothesized from an intraspecific segregating cross.

Author(s): 
Claverie, M.
Bosselut, N.
Lecouls, A. C.
Voisin, R.
Lafargue, B.
Poizat, C.
Kleinhentz, M.
Laigret, F.
Dirlewanger, E.
Esmenjaud, D.
Publication Title: 
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

Inheritance and linkage studies were carried out with microsatellite [or simple sequence repeat (SSR)] markers in a F(1) progeny including 101 individuals of a cross between Myrobalan plum ( Prunus cerasifera Ehrh) clone P.2175 and the almond (Prunus dulcis Mill.)-peach ( Prunus persica L. Batsch) hybrid clone GN22 ["Garfi" (G) almond x "Nemared" (N) peach].

Author(s): 
Dirlewanger, E.
Cosson, P.
Howad, W.
Capdeville, G.
Bosselut, N.
Claverie, M.
Voisin, R.
Poizat, C.
Lafargue, B.
Baron, O.
Laigret, F.
Kleinhentz, M.
Arús, P.
Esmenjaud, D.
Publication Title: 
TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

The Ma gene for root-knot nematode (RKN)resistance from Myrobalan plum (Prunus cerasifera L.)confers a complete-spectrum and a heat-stable resistance to Meloidogvne spp., conversely to Mi-I from tomato,which has a more restricted spectrum and a reduced efficiency at high temperature. This gene was identified from a perennial self-incompatible near-wild rootstock species and lies in cosegregation with the SCAR marker SCAFLP2 on the Prunus linkage group 7 in a 2.3 cM interval between the SCAR SCAL19 and SSR pchgms6 markers.

Author(s): 
Claverie, M.
Dirlewanger, E.
Cosson, P.
Bosselut, N.
Lecouls, A. C.
Voisin, R.
Kleinhentz, M.
Lafargue, B.
Caboche, M.
Chalhoub, B.
Esmenjaud, D.
Publication Title: 
Molecular genetics and genomics: MGG

Self-incompatibility in the genus Prunus is controlled by two genes at the S-locus, S-RNase and SFB. Both genes exhibit the high polymorphism and high sequence diversity characteristic of plant self-incompatibility systems. Deduced polypeptide sequences of three myrobalan and three domestic plum S-RNases showed over 97% identity with S-RNases from other Prunus species, including almond, sweet cherry, Japanese apricot and Japanese plum. The second intron, which is generally highly polymorphic between alleles was also remarkably well conserved within these S-allele pairs.

Author(s): 
Sutherland, Bruce G.
Tobutt, Kenneth R.
Robbins, Timothy P.
Publication Title: 
Journal of Plant Physiology

Two Prunus rootstocks, the Myrobalan plum P 2175 and the interspecific peach-almond hybrid, Felinem, were studied to characterize their biochemical and molecular responses induced under iron-Deficient conditions. Plants of both genotypes were submitted to different treatments using a hydroponic system that permitted removal of Fe from the nutrient solution.

Author(s): 
Gonzalo, María José
Moreno, María Ángeles
Gogorcena, Yolanda
Publication Title: 
Plant Cell Reports

Resistant rootstocks offer an alternative to pesticides for the control of soil pests. In Prunus spp., resistance loci to root-knot nematodes (RKN) have been mapped and a transformation method is needed to validate candidate genes. Our efforts have focused on the generation of transformed hairy-roots and composite plants appropriate for nematode infection assays. An efficient and reliable method using the A4R strain of Agrobacterium rhizogenes for the transformation of Prunus roots with an Egfp reporter gene is given.

Author(s): 
Bosselut, Nathalie
Van Ghelder, Cyril
Claverie, Michel
Voisin, Roger
Onesto, Jean-Paul
Rosso, Marie-Noëlle
Esmenjaud, Daniel
Publication Title: 
Phytopathology

The Ma gene from Myrobalan plum is a TNL gene that confers a high-level resistance to all root-knot nematodes of major economic importance, including Meloidogyne incognita, M. javanica, M. arenaria, and M. enterolobii. The nematode behavior in the roots and the corresponding histological mechanisms of the Ma resistance to M.

Author(s): 
Khallouk, Samira
Voisin, Roger
Van Ghelder, Cyril
Engler, Gilbert
Amiri, Saïd
Esmenjaud, Daniel
Publication Title: 
Plant Physiology

Root-knot nematode (RKN) Meloidogyne species are major polyphagous pests of most crops worldwide, and cultivars with durable resistance are urgently needed because of nematicide bans. The Ma gene from the Myrobalan plum (Prunus cerasifera) confers complete-spectrum, heat-stable, and high-level resistance to RKN, which is remarkable in comparison with the Mi-1 gene from tomato (Solanum lycopersicum), the sole RKN resistance gene cloned. We report here the positional cloning and the functional validation of the Ma locus present at the heterozygous state in the P.2175 accession.

Author(s): 
Claverie, Michel
Dirlewanger, Elisabeth
Bosselut, Nathalie
Van Ghelder, Cyril
Voisin, Roger
Kleinhentz, Marc
Lafargue, Bernard
Abad, Pierre
Rosso, Marie-Noëlle
Chalhoub, Boulos
Esmenjaud, Daniel
Publication Title: 
Physiologia Plantarum

Waterlogging is associated with poor soil drainage. As a consequence oxygen levels decrease in the root environment inducing root asphyxia and affecting plant growth. Some plants can survive under these conditions triggering complex anatomical and biochemical adaptations, mostly in the roots.

Author(s): 
Amador, María L.
Sancho, Sara
Bielsa, Beatriz
Gomez-Aparisi, Joaquín
Rubio-Cabetas, María J.

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