Evidence for long-term prevalence of cucumber vein yellowing virus in Sudan and genetic variation of the virus in Sudan and the Mediterranean Basin     

C. Desbiez  P. Caciagli  C. Wipf-Scheibel  P. Millot  L. Ruiz  D. Marian  G. Dafalla  H. Lecoq 《Plant pathology》2019,68(7):1268-1275

Cucumber vein yellowing virus (CVYV) is emerging throughout the Mediterranean Basin, where it causes significant damage to cucumber and melon crops. It has been suggested that CVYV originated from the Middle East and has spread only recently to other areas. In this work, an isolate from Sudan was characterized, and surveys performed in that country between 1992 and 2012 revealed a long-term presence of CVYV with a high molecular variability, showing that the virus has long been endemic in sub-Saharan Africa. Comparison of the full-length sequences of 11 CVYV isolates from different geographic origins revealed recombination events in CVYV populations from the Mediterranean Basin and the Middle East, and evidence for different selection pressures along the genome. These results shed a new light on the evolution of CVYV.  相似文献   

The effects of Enterolobium contortisiliquum serine protease inhibitor on the survival of the termite Nasutitermes corniger,and its use as affinity adsorbent to purify termite proteases     

Rodrigo da Silva Ferreira  Thiago Henrique Napoleo  Rosemeire A Silva‐Lucca  Mariana Cristina Cabral Silva  Patrícia Maria Guedes Paiva  Maria Luiza Vilela Oliva 《Pest management science》2019,75(3):632-638

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Development of pull and push–pull systems for management of lesser mealworm,Alphitobius diaperinus,in poultry houses using alarm and aggregation pheromones     

Marla J Hassemer  Miguel Borges  David M Withall  John A Pickett  Raul A Laumann  Michael A Birkett  Maria C Blassioli‐Moraes 《Pest management science》2019,75(4):1107-1114

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Ozone treatments activate defence responses against Meloidogyne incognita and Tomato spotted wilt virus in tomato     

Maria I Prigigallo  Maria Teresa Melillo  Giovanni Bubici  Petre I Dobrev  Radomira Vankova  Fabrizio Cillo  Pasqua Veronico 《Pest management science》2019,75(8):2251-2263

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When natural enemies go to sleep: diapause induction and termination in the pear psyllid predator Pilophorus gallicus (Hemiptera: Miridae)     

Maria J Ramírez‐Soria  Felix Wckers  Juan A Sanchez 《Pest management science》2019,75(12):3293-3301

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Terrestrial-marine continuum of sedimentary natural organic matter in a mid-latitude estuarine system     

Bravo  Carlo  Millo  Christian  Covelli  Stefano  Contin  Marco  De Nobili  Maria 《Journal of Soils and Sediments》2020,20(2):1074-1086

Journal of Soils and Sediments - Humic acids (HA) have several environmental roles, but are particularly important in aquatic environments, being recognized as redox active natural organic matter...  相似文献   

Co-inoculation of selected nodule endophytic rhizobacterial strains with Rhizobium tropici promotes plant growth and controls damping off in common bean     

Linnajara DE VASCONCELOS MARTINS FERREIRA  Fernanda DE CARVALHO  J&#;lia FONSECA COLOMBO ANDRADE  Damiany P&#;DUA OLIVEIRA  Fl&#;vio Henrique VASCONCELOS DE MEDEIROS  Fatima Maria DE SOUZA MOREIRA 《土壤圈》2020,30(1):98-108

Production of common bean(Phaseolus vulgaris)is limited by the occurrence of damping off(rhizoctoniosis),which is caused by the fungus Rhizoctonia solani.However,the co-inoculation of plant growth-promoting rhizobacteria(PGPR)involved in biological control along with diatomic nitrogen(N2)-fixing rhizobia can enhance N nutrition and increase production.In this context,finding microorganisms with synergistic effects that perform these two roles is of fundamental importance to ensure adequate yield levels.The aim of this study was to evaluate the effects of co-inoculation of nodule endophytic strains of the genera Bacillus,Paenibacillus,Burkholderia,and Pseudomonas with Rhizobium tropici CIAT 899,an N2-fixing rhizobial strain,on the biocontrol of damping off and growth promotion in common bean plants.Greenhouse experiments were conducted under axenic conditions using the common bean cultivar Pérola.The first experiment evaluated the potential of the 14 rhizobacterial strains,which were inoculated alone or in combination with CIAT 899,for the control of R.solani.The second experiment evaluated the ability of these 14 rhizobacterial strains to promote plant growth with three manners of N supply:co-inoculation with CIAT 899 at low mineral N supply(5.25 mg N mL^-1),low mineral N supply(5.25 mg N mL^-1),and high mineral N supply(52.5 mg N mL^-1).The use of rhizobacteria combined with rhizobia contributed in a synergistic manner to the promotion of growth and the control of damping off in the common bean.Co-inoculation of the strains UFLA 02-281/03-18(Pseudomonas sp.),UFLA 02-286(Bacillus sp.),and UFLA 04-227(Burkholderia fungorum)together with CIAT 899 effectively controlled damping off.For the common bean,mineral N supply can be replaced by the co-inoculation of CIAT 899 with plant growth-promoting strains UFLA 02-281/02-286/02-290/02-293.Nodule endophytes UFLA02-281/02-286 are promising for co-inoculation with CIAT 899 in the common bean,promoting synergy with rhizobial inoculation and protection against disease.  相似文献   

Does the application of silvicultural management models drive the growth and stem quality of sweet chestnut coppices towards sustainability?     

Patrício  Maria Sameiro  Nunes  Luís  Monteiro  Maria Loreto 《New Forests》2020,51(4):615-630

New Forests - The coppice is a very flexible cultural system producing several calibers adapting to the demands of the market. Small-caliber roundwood from sweet chestnut (Castanea sativa Mill.)...  相似文献   

Some effects of light intensity and photoperiod on the sea bass larvae (Dicentrarchus labrax (L.)) reared at the Centre Oceanologique de Bretagne     

Maria Helena Barahona-Fernandes 《Aquaculture (Amsterdam, Netherlands)》1979,17(4):311-321

Four experiments were performed to determine the effects of light intensity on the growth and survival of sea bass larvae; two experiments dealt with the photoperiod and two with the combined effects of light intensity and the photoperiod. Recently hatched larvae from the same spawning were used within each experiment.The light intensity experiments show that there is better growth but poorer survival at higher light intensities. The photoperiod experiments show a better growth at 18 h photoperiod and a better survival at 12 h exposure to light. The study of the combined effects of light intensity and photoperiod confirmed the hypothesis that strong light intensities are lethal to newly hatched larvae (with no pigmentation). If the light intensity is lowered during the first week, the best rearing conditions were found to be continuous lighting relative to survival rate, and 14–16 h photoperiod relative to growth.  相似文献   

Discrimination of ‘San Marzano’ accessions: A comparison of minisatellite, CAPS and SSR markers in relation to morphological traits     

Martina Caramante  Rosa Rao  Luigi Maria Monti  Giandomenico Corrado   《Scientia Horticulturae》2009,120(4):560-564

‘San Marzano’ (SM) is one of the most widely known tomato (Solanum lycopersicum L.) cultivars, and is a classic example of a local variety with a premium value. Unfortunately, the original cultivated form is underrepresented in the Protected Denomination of Origin (PDO) area because of the incidence of contaminant and phenotypically similar genotypes. Our aim was to examine the ability of three DNA marker systems (minisatellite, cleaved amplified polymorphic sequence (CAPS) and simple sequence repeat (SSR)) to reveal the genetic diversity of tomato accessions that were, based on a morphological analysis, very similar. The data indicate that both minisatellites and SSRs can be used to genetically distinguish the analysed materials. Furthermore, these two marker systems depict relationships consistent with the hierarchal pattern obtained by the morphological data. As locally cultivated tomato accessions are often characterised by some degree of genetic variability, our results will be valuable in facilitating the purification, management and breeding of tomato germplasms. The differences between the marker systems employed are also discussed in relation to their usefulness in the agro-food chain.  相似文献