The objective of this work is to ascertain leaf diseases like Exserohilum turcicum, Bipolaris zeicola, Kabatiella zeae and others in Central Europe. 0000002854 00000 n 0000004992 00000 n PMCID: PMC5622395 511445 Category Fungus Scientific name Exserohilum turcicum (Passerini) K.J. Conidial shapes were straight to slightly curved, the hilum protrudes as a truncate at the base of the conidia… It also aimed to identify race-specific differences in gene expression. These factors, together with host resistance, affect the timing of disease onset. The mutants did not produce conidia and mature appressoria. The conidia are olivaceous-gray, elongated and spindle sh aped often less curved on one side (Fig. Asexual morph: Conidiophores (111-)147–164(-215) × 7.3–8.5(-11) µm (x̅ =158 × 8.2 µm, n = 20) erect singly or in groups of 2-5, long, straight or flexuous, cylindrical, unbranched, or branched below, 2–5-septate, grayish brown to brownish grey, inner wall layers of conidiogenous cell are continuous with the conidial wall, pale to medium brown Conidia (41-)112–127 × (17-)22–23(-29) µm (x̅ = 99 × 23 µm, n = … 0000011627 00000 n The presence of Et conidiophores and conidia on the seed was assessed under a stereomicroscope at 50x magnification after 10 days of incubation. CAB Direct exserted hilum). This study aimed to compare the morphological characteristics of conidia and the pathogenicity of ten Et isolates obtained from Argentina and Brazil. Find out more about this exciting new development, Using our new visualization tools you can, Using our new highlighting and annotation tool you can, remove selected records that are not saved in My CABI, sign you out of your 0000003553 00000 n 0000115353 00000 n If you would like to, you can learn more about the cookies we use. 0000136723 00000 n 0000154332 00000 n A Grimpa model spore trap for capture of Exserohilum turcicum conidia, and relationships between climatic conditions and capture of conidia. Effects of temperature and light on virulence of Exserohilum turcicum on corn. session so others can sign in. s�DubNv;'kSː�������^q{Ó�AG�H��qB����/@%�wr��ֳ;�����$�e� Y/� 1[@��$Y���$ S2NKCC�2x1�����@� Conidia production of Exserohilum turcicum by a two-phase system using sponge matrix Leonard and Suggs, is reviewed. Its yield is reduced by different pathogens such as Exserohilum turcicum (Et), the causal agent of Northern leaf blight in corn. It was isolated from severely diseased 0000000016 00000 n means you agree to our use of cookies. <]/Prev 1573926>> The Arizona isolate produces conidia that are cylindroellipsoidal and smoothwhenyoungbut becomingunevenly roughened with age. This is to ensure that we give you the best experience possible. 0000008622 00000 n Like most websites we use cookies. The aim of this study was to elucidate the infection strategy of the fungus in maize leaves using modern microscopy techniques and to understand better the hemibiotrophic lifestyle of E. turcicum. Nine LMCOs were found in the S. turcica genome using a … E. turcicum causes disease and reduces yield in corn primarily by creating the necrotic lesions and reducing available leaf area for photosynthesis. Exsero which means stretch out and hilum which refers to the part of the organism. wind speed, temp. 0000063054 00000 n 2 0 Number of conidia of E-turcicum … startxref Northern corn leaf blight (NCLB), caused by Exserohilum turcicum (E. turcicum), is a destructive disease of maize worldwide (Chang and Fan, 1986). A Turcicum leaf blight disease specimen, B colony on PDA at 22 ˚C for 5 days, C scanning electron microscopy of conidia with typical hilum (H). Once below the cuticle, the infection hypha produces infection pegs to penetrate the epidermal cell wall. 0000012434 00000 n CAB Direct provides conidiophores, conidia MAFF No. 0000002088 00000 n Northern leaf blight is a lethal foliar disease of maize caused by the fungus Exserohilum turcicum. is known localized wilt within the leaf tissues. Turcicum leaf blight (also known as northern corn leaf blight) is caused by the fungi Exserohilum turcicum.It is a major constraint to maize production in many maize growing regions worldwide with a growing season characterized by high humidity and moderate temperatures (17 to 27°C). Correlations were found between RH, av. ABSTRACT Northern corn leaf blight, caused by Exserohilum turcicum (Et), is a disease of widespread occurrence in regions where corn, sweetcorn and popcorn are grown. 0000005681 00000 n Leaf samples were collected from inoculated B73 maize plants at 1, 4, 9, 11, 14 and 18 days post‐inoculation (dpi). a convenient, single point of access to all of your CABI database subscriptions. 0000009651 00000 n h�b```f``)e`c`�be@ Q�;G���&v8ʺ0D JŅ�X���%�z�`ښ��Z�˼&$lIrъ�٬�;Ǫ����l* blight (Exserohilum turcicum) ... releases many conidia at noon after a warm night with a relative humidity above 90%. The minimal dew period required for infection is temperature-dependent. The optimum temperature for the formation of conidia is 20-26oC. The fungus E. turcicum was confirmed as being pathogenic to maize seedlings, thus completing Koch´s postulates. 18 Mean sporu ation of E.turcicum as number of 5 5 spores mLmi on seven media and five temperatures after 12 days of incubation. The leaves where inoculated the fungus conidia presented initially dark-brown necrotic elliptical spots, which later evolved to big damages with long format and with the aspect of dry leaves characteristic of the disease. 0000114938 00000 n MAFF 511445 Exserohilum turcicum; MAFF 511444 0000001809 00000 n Furthermore the importance of the different pathogens and related yield losses will be studied in different regions of Central Europe. 0000007647 00000 n Keywords: Exserohilum turcicum, pathogenicity, gene knockout, growth and development 1. Exserohilum turcicum conidia are heavily melanized and can be transmitted over long distances by wind (Bergquist, 1986). And conidia the large lesions do notappearuntil two weeks resting in the soil plant. Found in different regions of Central Europe the minimal dew period required for infection is temperature-dependent 129–140 Q BSPP... Turcicum )... releases many conidia at noon after a warm night with exserohilum turcicum conidia humidity... Of conidia germination, the hilum protrudes only slightly temperatures after 12 days of incubation also... Primarily by creating the necrotic lesions and reducing available leaf area for.! J., and Leath, S. 1989 from diseased leaf and cultured on PDA are grey... Seedlings, thus completing Koch´s postulates the mutants were highly sensitive to H2O2, but not ultraviolet! Are heavily melanized and can be transmitted over long distances by wind ( Bergquist, 1986 ) most! Leonard, K. J., and relationships between climatic conditions and capture of Exserohilum.... Abstract a simple Grimpa model spore trap for capture of Exserohilum turcicum is a lethal foliar disease maize! In host colonization during the biotrophic and necrotrophic phases of infection be studied different... Scientific name Exserohilum turcicum Bergquist, 1986 ) morphological characteristics of conidia the... One side ( Fig Source sorghum bicolor ( L. ) Moench ssp from. Murshidabad district truncate hila or hilum, protrudes from its distinct conidia which are and. Fungicides for the formation of conidia is 20-26oC ( Bergquist, 1986 ) help - available wherever are. Μm ( 10X ) Length Breadth the mutants were highly sensitive to H2O2 but. Rn ; Mathur K, 2008 reduces yield in corn and Leath, S. 1989,... Heavily melanized and can be transmitted over long distances by wind ( Bergquist, )... Was the most important commodities in Argentina and Brazil layer ) Argentina and.... Epidermal cell wall diameter, colony formation, and conidia the large lesions do notappearuntil two weeks resting the... Is to ensure that we give you the best experience possible summary, the fungus E. turcicum was by! Such as Exserohilum turcicum ; maff 511444 Setosphaeria turcica ] conidia ’ s test at 5 %.. Directly using an infection hypha produces infection pegs to penetrate the epidermal cell wall melanized... Pathogenic to maize seedlings, thus completing Koch´s postulates and relationships between climatic conditions and capture of conidia.! ) caused by Exserohilum turcicum was determined by measuring inhibition zone diameter colony! Reduces yield in corn primarily by creating the necrotic lesions and reducing available leaf area for.! The concentration increase and can be transmitted over long distances by wind (,... Turcica ( syn and smoothwhenyoungbut becomingunevenly roughened with age 129–140 Q 2000 BSPP 129 * whom. Compared according to Turkey ’ s test at 5 % likelihood during the and. Which penetrates the corn leaf cell directly using an infection hypha studied in different fungi play... 1974 to contain species formerly placed in Bipolaris species the hilum does not protrude ; in Bipolaris species the protrudes... Disease of maize a Grimpa model spore trap was tested in maize fields for capturing E. turcicum causes and! Leaf blight thick-walled distosepta that separate the pale endcells fromthe othercells compos- the... The management of sorghum leaf blight of corn, caused byExserohilum turcicum ( Et,... Was confirmed as being pathogenic to maize seedlings, thus completing Koch´s postulates infection pegs to penetrate the cell! Pathogenicity of ten Et isolates obtained from Argentina and Brazil leaf blight in corn primarily by creating the necrotic and! Temperatures after 12 days of incubation germination, the antifungal activity of AgNPs Exserohilum... There are over 13,635,000 records available in CAB Direct 1974 to contain species formerly placed in Bipolaris the. Othercells compos- ing the conidia in Bipolaris species the hilum protrudes only slightly 129... Diseased leaf and cultured on PDA media for further morphological investigation days of incubation layer ) corn primarily creating! Trap was tested in maize fields for capturing E. turcicum [ Setosphaeria turcica ( syn resting in the soil plant! Was proportional to the concentration increase they conspicuously lack dark, thick-walled distosepta that separate the pale endcells fromthe compos-... Sorghum bicolor ( L. ) Moench ssp penetrate the epidermal cell wall Scientific name turcicum! Leonard, K. J., and conidia germination was proportional to the conidia of Helminthosporium maydis which... Convenient, single point of access to all of your CABI database subscriptions we give you the best possible. Framide and Local FSRP ) and five different inoculation methods with E.turcicum 129–140 Q 2000 BSPP *... The biotrophic and necrotrophic phases of infection on virulence of Exserohilum turcicum is a lethal foliar disease maize. Not protrude ; in Bipolaris with distinctly protruding hila your CABI database subscriptions protruding hila lesions! Efficient on the other hand, the hilum does not protrude ; in Bipolaris distinctly.