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Primo, P. Di; Cappelli, C.; Katan, Talma

doi:10.1023/a:1021204022787

Cited by 19 publications

(16 citation statements)

References 9 publications

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“…Fusarium oxysporum (corm rot agent) from saffron in Italy and Spain has been classified as Fusarium oxysporum f.sp. gladioli [20] but the Fusarium oxysporum (Fox) pathogen of saffron from Kashmir and Kishtwar has not been classified up to forma specialis level [16,21].…”

Section: Introductionmentioning

confidence: 99%

Invasion and Colonization of Pathogenic Fusarium oxysporum R1 in Crocus sativus L. during Corm Rot Disease Progression

Bhagat

Magotra

Gupta

et al. 2022

JoF

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The corm rot of saffron caused by Fusarium oxysporum (Fox) has been reported to be the most destructive fungal disease of the herb globally. The pathogen, Fusarium oxysporum R1 (Fox R1) isolated by our group from Kashmir, India, was found to be different from Fusarium oxysporum f.sp. gladioli commonly reported corm rot agent of saffron. In the present study, Fox R1 was further characterized using housekeeping genes and pathogenicity tests, as Fusarium oxysporum R1 f.sp. iridacearum race 4. Though Fox R1 invaded the saffron plant through both corm and roots, the corm was found to be the preferred site of infection. In addition, the route of pathogen movement wastracked by monitoring visual symptoms, semi-quantitative PCR, quantitative-PCR (q-PCR), real-time imaging of egfp-tagged Fusarium oxysporum R1, and Fox R1 load quantification. This study is the first study of its kind on the bidirectional pathogenesis from corm to roots and vice-versa, as the literature only reports unidirectional upward movement from roots to other parts of the plant. In addition, the colonization pattern of Fox R1 in saffron corms and roots was studied. The present study involved a systematic elucidation of the mode and mechanism of pathogenesis in the saffron Fusarium oxysporum strain R1 pathosystem.

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Section: Introductionmentioning

confidence: 99%

Invasion and Colonization of Pathogenic Fusarium oxysporum R1 in Crocus sativus L. during Corm Rot Disease Progression

Bhagat

Magotra

Gupta

et al. 2022

JoF

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“…Corm rot due to Fusarium spp. is characterized by yellowing, drooping and wilting of the shoots during flowering period [76], resulting in the death of foliage. On the upper surface, initially the infected corms show small specks with chlorotic haloes, which later on spread to the whole corm and eventually the entire corm turns into dark powdery mass and decay.…”

Section: Symptomsmentioning

confidence: 99%

“…From the infected corms, in Italy, Penicillium cyclopium, F. oxysporum f. sp. gladioli and Burkholderia gladioli have been observed [52,54,76]. Penicillium corymbiferum was reported from Scotland, Italy and China [57,79,80].…”

Section: Pathogens Associated With Corm Rotmentioning

confidence: 99%

Corm Rot of Saffron: Epidemiology and Management

et al. 2021

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Saffron, comprising of dried stigmas of the plant known as Crocus sativus, is one of the most important and scantly cultivated agricultural products. It has been used as a precious spice for the last at least 3500 years. Due to its numerous medicinal qualities and pharmacological applications, it is considered as a “golden condiment”, and its demand and consumptions has risen over a period of time. Although efforts are continuously being made to enhance the productivity in the traditional areas and promote the cultivation of saffron in the newer areas, there are several constraints hindering these efforts. Prevalence of corm rot is one such limiting factor which results in the reduction in saffron production and decline in the area under its cultivation. The disease not only reduces the yield substantially, but also adversely affects the production of daughter corms. Complete understanding and knowledge about the disease is still lacking due to the inadequate information about its etiology and epidemiology. Moreover, due to the non-availability of resistant genotypes and lack of improved cultural practices, presently no effective and sustainable management strategies are available. This review article gives an overall account of the history and impact of saffron corm rot, its present status, yield losses caused by it, dynamics of the pathogens associated with the disease, their survival and dispersal, factors influencing disease intensity, epidemiology and sustainable management strategies. As comprehensive information on the disease is presently not available, an attempt has been made to review the current knowledge regarding corm rot of saffron. The information about the disease discussed here can eventually be beneficial for the growers, students, researchers, plant protection organizations, development departments, extension workers, policy makers, government agencies and public organizations.

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“…However, C. sativus suffers from serious diseases in field production. The most severe disease of C. sativus is corm rot, leading to more than 50% mortality (Di Primo et al, 2002). Corm rot can be caused by various pathogens, but Fusarium oxysporum infection is the main cause (Hu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere microorganisms of Crocus sativus as antagonists against pathogenic Fusarium oxysporum

Zhang

Zhu

et al. 2022

Front. Plant Sci.

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IntroductionSeveral microorganisms in the plant root system, especially in the rhizosphere, have their own compositions and functions. Corm rot is the most severe disease of Crocus sativus, leading to more than 50% mortality in field production.MethodsIn this study, metagenomic sequencing was used to analyze microbial composition and function in the rhizosphere of C. sativus for possible microbial antagonists against pathogenic Fusarium oxysporum.ResultsThe microbial diversity and composition were different in the C. sativus rhizosphere from different habitats. The diversity index (Simpson index) was significantly lower in the C. sativus rhizospheric soil from Chongming (Rs_CM) and degenerative C. sativus rhizospheric soil from Chongming (RsD_CM) than in others. Linear discriminant analysis effect size results showed that differences among habitats were mainly at the order (Burkholderiales, Micrococcales, and Hypocreales) and genus (Oidiodendron and Marssonina) levels. Correlation analysis of the relative lesion area of corm rot showed that Asanoa was the most negatively correlated bacterial genus (ρ = −0.7934, p< 0.001), whereas Moniliophthora was the most negatively correlated fungal genus (ρ = −0.7047, p< 0.001). The relative lesion area result showed that C. sativus from Qiaocheng had the highest resistance, followed by Xiuzhou and Jiande. C. sativus groups with high disease resistance had abundant pathogen resistance genes, such as chitinase and β-1,3-glucanase genes, from rhizosphere microorganisms. Further, 13 bacteria and 19 fungi were isolated from C. sativus rhizosphere soils, and antagonistic activity against pathogenic F. oxysporum was observed on potato dextrose agar medium. In vivo corm experiments confirmed that Trichoderma yunnanense SR38, Talaromyces sp. SR55, Burkholderia gladioli SR379, and Enterobacter sp. SR343 displayed biocontrol activity against corm rot disease, with biocontrol efficiency of 20.26%, 31.37%, 39.22%, and 14.38%, respectively.DiscussionThis study uncovers the differences in the microbial community of rhizosphere soil of C. sativus with different corm rot disease resistance and reveals the role of four rhizospheric microorganisms in providing the host C. sativus with resistance against corm rot. The obtained biocontrol microorganisms can also be used for application research and field management.

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Untitled

Cited by 19 publications

References 9 publications

Invasion and Colonization of Pathogenic Fusarium oxysporum R1 in Crocus sativus L. during Corm Rot Disease Progression

Invasion and Colonization of Pathogenic Fusarium oxysporum R1 in Crocus sativus L. during Corm Rot Disease Progression

Corm Rot of Saffron: Epidemiology and Management

Rhizosphere microorganisms of Crocus sativus as antagonists against pathogenic Fusarium oxysporum

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