European Journal of Plant Pathology最新文献

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Bacillus siamensis strain B30 as a biocontrol agent for enhancing systemic resistance and mitigating bean yellow mosaic virus infestation in faba bean plants 暹罗芽孢杆菌 B30 菌株作为一种生物控制剂,可增强蚕豆植物的系统抗性并减轻蚕豆黄花菜病毒的侵染
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-09-10 DOI: 10.1007/s10658-024-02943-9
Ahmed Abdelkhalek, Abdulaziz A. Al-Askar, Karrar A. Hamzah, Toufic Elbeaino, Hassan Moawad, Hamada El-Gendi, Hosny A. Younes, Said I. Behiry
{"title":"Bacillus siamensis strain B30 as a biocontrol agent for enhancing systemic resistance and mitigating bean yellow mosaic virus infestation in faba bean plants","authors":"Ahmed Abdelkhalek, Abdulaziz A. Al-Askar, Karrar A. Hamzah, Toufic Elbeaino, Hassan Moawad, Hamada El-Gendi, Hosny A. Younes, Said I. Behiry","doi":"10.1007/s10658-024-02943-9","DOIUrl":"https://doi.org/10.1007/s10658-024-02943-9","url":null,"abstract":"<p><i>Bacillus siamensis</i> strain B30 was isolated from the rhizosphere of faba bean and molecularly identified using the 16S rRNA (Acc# OQ878652) and rpoB (Acc# OR061338) genes. Under greenhouse conditions, the application of B30, whether through soil inoculum or foliar application of its culture filtrate, significantly promoted growth and triggered systemic resistance against bean yellow mosaic virus (BYMV) infection in faba bean. As a result, the disease severity and viral accumulation levels were significantly reduced, by about 64% and 88%, respectively, for foliar application treatment. Furthermore, B30 treatments resulted in significant elevations in antioxidant enzymes such as catalase (CAT), ascorbate peroxidase (APX), polyphenol oxidase (PPO), and superoxide dismutase (SOD), as well as total chlorophyll content and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. A significant decrease in oxidative stress markers, namely hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and malondialdehyde (MDA), was observed. These changes were accompanied by an upregulation of the transcriptional levels of pathogenesis-related genes. Furthermore, HPLC analysis revealed that most polyphenolic compounds were induced and accumulated in plants undergoing B30 treatments. GC–MS analysis revealed that the ethyl acetate extract of B30 culture filtrate contains significant amounts of 3,3-dimethylbutan-1,2-dione oxime; 3,4-dihdro-2H-1,5-(3\"-T-butyl) benzodioxepine;1-nonadecene; 1-dodecanol, 3,7,11-trimethyl-; 1-docosene; 3,7,11-trimethyl-; pyrrolo[1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl)-; 2,2-dideutero octadecanal and á-sitosterol. The capability of <i>B. siamensis</i> B30 to boost faba bean growth and induce systemic resistance against BYMV infection implies that it could be utilized as a biocontrol agent, a viable and environmental approach to protecting faba bean plants from BYMV infection. This is the first time <i>B. siamensis</i> has been reported to have antiviral activity against plant viral infections.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"61 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An integrated strategy for pathogen surveillance unveiled Xylella fastidiosa ST1 outbreak in hidden agricultural compartments in the Apulia region (Southern Italy) 病原体监测综合战略揭示了阿普利亚地区(意大利南部)隐蔽农业区爆发的快疫木球菌 ST1疫情
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-09-10 DOI: 10.1007/s10658-024-02945-7
Daniele Cornara, Donato Boscia, Giusy D’Attoma, Michele Digiaro, Angela Maria Ligorio, Giuliana Loconsole, Serena Anna Minutillo, Vito Montilon, Francesco Palmisano, Gianvito Ragone, Maria Rosaria Silletti, Vincenzo Verrastro, Claudio Zaza, Maria Saponari
{"title":"An integrated strategy for pathogen surveillance unveiled Xylella fastidiosa ST1 outbreak in hidden agricultural compartments in the Apulia region (Southern Italy)","authors":"Daniele Cornara, Donato Boscia, Giusy D’Attoma, Michele Digiaro, Angela Maria Ligorio, Giuliana Loconsole, Serena Anna Minutillo, Vito Montilon, Francesco Palmisano, Gianvito Ragone, Maria Rosaria Silletti, Vincenzo Verrastro, Claudio Zaza, Maria Saponari","doi":"10.1007/s10658-024-02945-7","DOIUrl":"https://doi.org/10.1007/s10658-024-02945-7","url":null,"abstract":"<p>Annual surveillance programs for the plant pathogenic bacterium <i>Xylella fastidiosa</i> are implemented in Europe as part of the preventive phytosanitary strategies enforced to face the emergence of the detrimental infections reported in olives in southern Italy. The programs include inspections and sampling of host plants by prioritizing those showing suspicious symptoms or those known to be highly susceptible to different strains and subspecies of the bacterium. In the framework of these programs numerous outbreaks have been unraveled, with several strains and subspecies found to infect a relatively large host range in France, Spain, Portugal and Italy. Here we report the results of an integrated surveillance approach implemented in the Apulia Region (southern Italy), where a conventional survey program on host plants is complemented by monitoring and testing for <i>X. fastidiosa</i> the insect vectors. In the framework of this program, bacterium-positive spittlebugs were intercepted in the <i>Xylella</i>-free area of the region, close to one of the most relevant Italian table grape production district. Such findings prompted further investigation to identify the bacterial reservoir in the host plants. Almond and grapevine were found to be the most frequently infected hosts, with infections caused by isolates of <i>X. fastidiosa</i> subspecies <i>fastidiosa</i> ST1. Investigations are ongoing to assess the extent and history of the outbreak, to assess and estimate the potential impacts, and define the best options for its containment.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"21 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mixed models in the selection of interspecific crosses of Psidium spp. resistant to myrtle rust 桃金娘锈病种间杂交选择中的混合模型
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-09-09 DOI: 10.1007/s10658-024-02942-w
Letícia da Silva Araújo, Alexandre Pio Viana, Silvaldo Felipe da Silveira, Beatriz Murizini Carvalho, Débora Souza Mendes, Joameson Antunes Lima
{"title":"Mixed models in the selection of interspecific crosses of Psidium spp. resistant to myrtle rust","authors":"Letícia da Silva Araújo, Alexandre Pio Viana, Silvaldo Felipe da Silveira, Beatriz Murizini Carvalho, Débora Souza Mendes, Joameson Antunes Lima","doi":"10.1007/s10658-024-02942-w","DOIUrl":"https://doi.org/10.1007/s10658-024-02942-w","url":null,"abstract":"<p>Myrtle rust severely impacts guava cultivation. Currently, no rust-resistant guava cultivars have been found. This study aimed to identify rust-resistant plants from interspecific crosses of Psidium spp. using mixed models. Twenty-six crosses were evaluated in a greenhouse from September to October 2020. Inoculation was performed on young leaves and floral buds, and characteristics such as the latent period, infectious period, and area under the disease progress curve were measured to determine variance components and genetic parameters. Genotypic values were analyzed, and clones were ranked using mixed models. The genetic, environmental, and broad-sense heritability values varied from moderate to high. Mixed models revealed genetic variability for rust resistance. Clones from the Cv1 x Cv11 and Cv8 x Cv11 crosses were immune to rust. The P36 x P11 cross exhibited variability. The results of this study indicate the selection of clones that are immune and resistant to rust for use in future recombination.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prevalence and diversity of pathogen-like endophytic fungi from wild grasses and sedges of Iran’s Hyrcanian forests 伊朗希尔卡尼亚森林野草和莎草中病原类内生真菌的普遍性和多样性
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-09-06 DOI: 10.1007/s10658-024-02937-7
Sara Yazdani-Khameneh, Alireza Golnaraghi, Stephen J. Wylie, Farshad Rakhshandehroo, Hossein Bakhoda
{"title":"Prevalence and diversity of pathogen-like endophytic fungi from wild grasses and sedges of Iran’s Hyrcanian forests","authors":"Sara Yazdani-Khameneh, Alireza Golnaraghi, Stephen J. Wylie, Farshad Rakhshandehroo, Hossein Bakhoda","doi":"10.1007/s10658-024-02937-7","DOIUrl":"https://doi.org/10.1007/s10658-024-02937-7","url":null,"abstract":"<p>The diversity of mycoflora associated with grass and sedges belonging to 24 species of eight plant families inhabiting three regions of the Hyrcanian Forest in Iran was surveyed. Fungal isolates were recovered from the roots, stems and leaves of plants, and ITS sequences of ribosomal DNA were determined. The 113 fungal isolates were categorized into the lowest taxonomic rank possible. Surprisingly, pathogen-like fungi encompassed 34% of the endophytic isolates. <i>Colletorichum</i>, <i>Fusarium</i>, and <i>Alternaria,</i> all genera containing important pathogenic species, were abundant. Occurrence of <i>Fusarium</i> was highest in root tissues, while <i>Colletotrichum</i> appeared more dominant in leaves and stems. Wheat seedlings were exposed to inocula of 25 of these endophytic isolates. Eleven isolates inhibited growth of the seedlings, whereas 14 isolates promoted growth compared to uninoculated controls. Further, wheat seedlings treated with isolates reported as etiological agents such as <i>Parastagonospora nodorum</i> and <i>Fusarium</i> sp., promoted growth. We report first-time isolation of <i>Darksidea</i> sp., a genus of root-colonizing dark septate endophytes (DSE), from herbaceous vegetation of Hyrcanian forests of Iran.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determining the relationship between pre-plant Verticillium dahliae inoculum densities and development of Verticillium wilt of tomatoes 确定种植前大丽轮枝菌接种密度与西红柿轮枝枯萎病发展之间的关系
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-09-05 DOI: 10.1007/s10658-024-02944-8
Estianne Retief, Sandra Lamprecht, Adele McLeod
{"title":"Determining the relationship between pre-plant Verticillium dahliae inoculum densities and development of Verticillium wilt of tomatoes","authors":"Estianne Retief, Sandra Lamprecht, Adele McLeod","doi":"10.1007/s10658-024-02944-8","DOIUrl":"https://doi.org/10.1007/s10658-024-02944-8","url":null,"abstract":"<p><i>Verticillium dahliae</i> is an economically important soilborne pathogen of tomato of which the microsclerotial inoculum can survive in the soil for extended periods of time. Previous studies, including two studies on tomato, reported that pre-plant microsclerotia soil densities can sometimes, but not always, predict the incidence or severity of Verticillium wilt. The overall objective of the study was to determine if <i>V</i>. <i>dahliae</i> pre-plant microsclerotia densities can be used as a predictive tool for the development of Verticillium wilt of tomatoes. A published qPCR assay was optimised and could detect 4.20 fg V<i>. dahliae</i> DNA (0.16 microsclerotia/g soil) from tomato field soils. There were no noticeable variations in the average number of microsclerotia per hectare across five commercial tomato fields, regardless of whether a high density (four composite samples from 20 soil cores/ha), medium density (four composite samples from 12 soil cores/ha), or low density (one composite sample from five soil cores/ha) sampling method was employed. A highly intensive sampling strategy (20 independently analysed soil cores/ha) was investigated for its predictive value in disease development since it allowed for correlation analyses to be conducted. A significant correlation (<i>r</i> = 0.578, <i>P</i> = 0.008) was evident between the number of microsclerotia pre-plant and disease severity during the season in only one of the three investigated fields; no correlation existed with yield. A glasshouse plant bioassay, using specific quantities of inoculated microsclerotia, established that the microsclerotia threshold required for significant disease development was five microsclerotia/g soil (283.8 fg DNA/g soil). However, one and two microsclerotia/g soil, although not causing significant symptoms, were able to sometimes infect the plants. This study showed that pre-plant <i>V. dahliae</i> soil densities do not have a disease predictive value in tomato, and that plant infection can develop at very low soil inoculum densities.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antibiotics and thermotherapy have limited effectiveness in eliminating Candidatus Liberibacter asiaticus from citrus budwood 抗生素和热疗对消除柑橘芽材中的抗菌杆菌效果有限
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-08-31 DOI: 10.1007/s10658-024-02939-5
Leandra Oliveira Magalhães, Uiara Souza, Laudecir Lemos Raiol-Júnior, Everton Vieira de Carvalho, Alécio Souza Moreira, Juliana de Freitas-Astúa, Eduardo Augusto Girardi, Abelmon da Silva Gesteira
{"title":"Antibiotics and thermotherapy have limited effectiveness in eliminating Candidatus Liberibacter asiaticus from citrus budwood","authors":"Leandra Oliveira Magalhães, Uiara Souza, Laudecir Lemos Raiol-Júnior, Everton Vieira de Carvalho, Alécio Souza Moreira, Juliana de Freitas-Astúa, Eduardo Augusto Girardi, Abelmon da Silva Gesteira","doi":"10.1007/s10658-024-02939-5","DOIUrl":"https://doi.org/10.1007/s10658-024-02939-5","url":null,"abstract":"<p>Epigenetic markers related to resistance require regenerating healthy trees from previously infected plant tissues. Thus, sanitizing and regenerating healthy citrus plants from previously <i>Candidatus</i> Liberibacter asiaticus (CLas)-infected tissues constitute a valuable need for breeding programs. Immersion in ampicillin + streptomycin solution and thermotherapy were evaluated separately for eliminating CLas from infected citrus propagules. Valencia sweet orange (<i>Citrus</i> × <i>sinensis</i>) and trifoliate orange (<i>Citrus trifoliata</i>) were chosen as genotypes that were highly and moderately susceptible to CLas, respectively. Infected budwood was used to graft nucellar material with or without CLas. Thirty-two months after inoculation, 2.5-cm grafts were collected and treated by 12 h immersion in an antibiotic solution (1 g/L ampicillin + 0.1 g/L streptomycin) or in autoclaved Milli-Q water, and subsequently grafted onto Rangpur lime (<i>C.</i> × <i>limonia</i>) rootstocks. In a second experiment, thermotherapy was evaluated for treating stem cuttings kept for 0, 1.5 and 10 min at 55 °C in a water bath. The antibiotics did not influence plant regeneration, but CLas was effectively eliminated from only 22.2% of the infected propagules of trifoliate orange up to 15 months after treatment. Thermotherapy at 55 °C for 1.5 min was ineffective in completely suppressing CLas from trifoliate orange plants eight months after treatment, and was harmful to citrus propagation, notably sweet orange. Antibiotic treatment did not eliminate CLas in sweet orange propagules, but a decrease in titer was recorded for both genotypes.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"36 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correlation between the chemical composition of fresh and dried Cymbopogon citratus essential oil fractions and their antifungal effects against the causal agents of brown spot and bakanae diseases of rice 新鲜和干燥香蒲精油馏分的化学成分及其对水稻褐斑病和白粉病病原菌的抗真菌作用之间的相关性
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-08-29 DOI: 10.1007/s10658-024-02938-6
François Romain Fouelefack, Kumar Pal Tapan, Lekagne Joseph Blaise Dongmo, Mangoumou Ghislaine Ndonkeu, Pascal Noel Mekam, Julienne Nguefack
{"title":"Correlation between the chemical composition of fresh and dried Cymbopogon citratus essential oil fractions and their antifungal effects against the causal agents of brown spot and bakanae diseases of rice","authors":"François Romain Fouelefack, Kumar Pal Tapan, Lekagne Joseph Blaise Dongmo, Mangoumou Ghislaine Ndonkeu, Pascal Noel Mekam, Julienne Nguefack","doi":"10.1007/s10658-024-02938-6","DOIUrl":"https://doi.org/10.1007/s10658-024-02938-6","url":null,"abstract":"<p>The fresh and dried whole plant (CF and CD respectively) of <i>Cympopogon citratus</i> essential oils (EOs) and its fractions, were tested, for their antifungal activities against <i>Bipolaris oryzae</i> and <i>Fusarium moniliforme;</i> respectively responsible of brown spot and bakanae disease of rice (<i>Oryzae sativa </i>L). Their chemical compositions were obtained by GC-GC/MS analysis and correlated with their biological activities. All six collected EO fractions of <i>C. citratus</i> contain myrcene, limonene, α-gurjunene, neral and geranial, but in different proportions. Neral (45.64 - 79.00%) predominant in CD<sub>1</sub>, CD<sub>2</sub>, CD<sub>m</sub>, CF<sub>m,</sub> and geranial (18.79 - 45.64%) in CF<sub>1</sub>, CF<sub>2;</sub> were found as major components. A positive correlation between the biological activity and the predominant constituent (citral) content was not always apparent. Carvacrol acetate and farnesol (2E, 6Z) were found only in EO fractions from fresh plants (CF<sub>1</sub>, CF<sub>2</sub>, CF<sub>m</sub>), and have high antifungal activity against <i>B. oryzae</i> and <i>F. moniliforme</i> compared to that of fractions from dried plants (CD<sub>1</sub>, CD<sub>2</sub>, CD<sub>m</sub>). The EO fractions collected within the first 60 min starting from the moment the first drop of EO was dropped (CF<sub>1</sub>, CD<sub>1</sub>), were more active than the fractions collected after 61 min (CF<sub>2</sub>, CD<sub>2</sub>). Cedrol, hexahydrofarnesyl acetone, γ-decalactone, β-bisabolol, α-muurolol, cavacrol and β-eudesmol, were present in low amount in CF<sub>2</sub> and CD<sub>2</sub> and absent in CF<sub>1</sub> and CD<sub>1</sub>. The results serve as benchmark for researchers/industries, in fast and better targeting bioactive compounds and identify plausible interactions that may exist between constituents of an essential oil for a given biological activity.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A rapid method for the assessment of crown rot severity caused by Fusarium pseudograminearum in wheat seedlings 小麦秧苗假镰刀菌引起的冠腐病严重程度的快速评估方法
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-08-28 DOI: 10.1007/s10658-024-02941-x
Qiaoyun Li, Zhenfeng Guo, Ruolin Zhu, Zhao Yin, Xiaopeng Hao, Jianwei Tang, Chunhao Dong, Yuhao Yuan, Zhenpu Huang, Jishan Niu, Guihong Yin
{"title":"A rapid method for the assessment of crown rot severity caused by Fusarium pseudograminearum in wheat seedlings","authors":"Qiaoyun Li, Zhenfeng Guo, Ruolin Zhu, Zhao Yin, Xiaopeng Hao, Jianwei Tang, Chunhao Dong, Yuhao Yuan, Zhenpu Huang, Jishan Niu, Guihong Yin","doi":"10.1007/s10658-024-02941-x","DOIUrl":"https://doi.org/10.1007/s10658-024-02941-x","url":null,"abstract":"<p>Fusarium crown rot (FCR) is a significant global issue in wheat production. Planting resistant cultivars is the most effective strategy for mitigating FCR damage. However, breeding for FCR resistance is challenged by the lack of a reliable and high-throughput method for rapid and accurate assessment of numerous genotypes. This study evaluated FCR resistance in 50 wheat genotypes using the common soil-based method. None of the genotypes were immune or highly resistant and only 6.0% (three genotypes) showed moderate resistance at the seedling stage. Resistant and susceptible genotypes were then selected for preliminary experiments. A rapid water-culture method for assessing FCR resistance in wheat seedlings was developed. Seedlings were planted in petri dishes and inoculated by spraying conidial suspensions. This new method, which takes 15 days (about 50% of the time required for soil-based methods), requires minimal space and eliminates variability associated with soil or potting mixes. The disease index correlation between water-culture and soil-based methods was significant (<i>p</i> &lt; 0.01) with a correlation coefficient of 0.901. The resistance evaluation consistency among 50 genotypes using both methods was 94.0%, indicating high reproducibility and strong agreement with soil-based results. Therefore, this new method should be a valuable tool for initial screening of FCR-resistant germplasms from numerous genotypes in breeding programs.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"12 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Moderate water stress improve resistance to anthracnose rot in Arbequina olive fruits 适度的水分胁迫可提高 Arbequina 橄榄果实对炭疽病腐烂的抗性
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-08-26 DOI: 10.1007/s10658-024-02936-8
Paula Conde-Innamorato, Georgina Paula García-Inza, Jeremías Mansilla, Gabriela Speroni, Eduardo Abreo, Carolina Leoni, Inés Ponce de León, Omar Borsani
{"title":"Moderate water stress improve resistance to anthracnose rot in Arbequina olive fruits","authors":"Paula Conde-Innamorato, Georgina Paula García-Inza, Jeremías Mansilla, Gabriela Speroni, Eduardo Abreo, Carolina Leoni, Inés Ponce de León, Omar Borsani","doi":"10.1007/s10658-024-02936-8","DOIUrl":"https://doi.org/10.1007/s10658-024-02936-8","url":null,"abstract":"<p>Olive anthracnose caused by <i>Colletotrichum</i> spp. is the most important olive fruit disease worldwide. We hypothesize that induced water deficit in olive trees generates anatomical and biochemical changes which contribute to anthracnose fruit rot resistance. A three-year experiment was conducted in Arbequina under two irrigation treatments: fully irrigated (no water stress) and non-irrigated (moderate water stress), from pit hardening until harvest. At harvest, fruits were inoculated both <i>in planta</i> and <i>in vitro</i> with an isolate of <i>C. acutatum</i> s.l. Our results showed that fruits grown under moderate water stress had significantly lower disease incidence and severity compared to those grown without water stress. Additionally, moderate water stress increased the activity of the enzymes related to hydrogen peroxide scavenging (Catalase and Peroxidase) and enhanced cuticle fruit thickness. Together, these factors contributed to a greater resistance to <i>C. acutatum</i> s.l. infection, both <i>in vitro</i> and <i>in planta,</i> reflected by different area under the disease progress curve (averaging 45% and 30% lower incidence and severity, respectively). These findings could explain differences in disease expression observed in olive orchards across seasons and managements practices.</p>","PeriodicalId":12052,"journal":{"name":"European Journal of Plant Pathology","volume":"15 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Populations of Phytophthora infestans in northern and eastern Europe 北欧和东欧的疫霉菌种群
IF 1.8 3区 农林科学
European Journal of Plant Pathology Pub Date : 2024-08-23 DOI: 10.1007/s10658-024-02933-x
Mirella Ludwiczewska, Marta Janiszewska, Zhimin Yin, Jadwiga Śliwka
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