Seyed Reza Razaz Hashemi's research while affiliated with Fars Research Center for Agriculture and Natural Resources and other places

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Publications (1)

Figure 1 Conidia of Leveillula taurica from Lycopersicon esculentum, scale bar = 50 μm.  
Figure 2 A minimum-evolution (ME) tree (length = 0.36098138) based on ITS data for 45 Leveillula taxa and two outgroup taxa. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the Maximum Composite Likelihood method and are in the units of the number of base substitutions per site. The ME tree was searched using the Close-Neighbor-Interchange (CNI) algorithm at a search level of 1 (level = 1). The Neighbor-joining algorithm was used to generate the initial tree. All positions containing gaps and missing data were eliminated from the dataset (Complete deletion option). The numbers above the branches represent branch support using 1000 bootstrap replications (Bootstrap values below 50 % are not shown).  
Table 2 Host range test of tomato powdery mildew (Leveillula taurica).
Powdery mildew of tomato in Qazvin province of Iran: host range, morphological and molecular characterization
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June 2012

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1 Citation

Journal of Crop Protection

Sepideh Hoseinkhaniha

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Mohamad Mahdi Zarabi

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Seyed Reza Razaz Hashemi

Powdery mildew is one of the most important disease concerns of tomato production in different regions of the world, which is caused by different species of Erysiphales. The most important causal agents of which are Leveillula taurica and Oidium neolycopersici. In the present study tomato farms in Qazvin were surveyed and tomato leaves with powdery mildew symptoms were collected. After morphological studies in laboratory and using reliable resources, the causal agent of tomato powdery mildew was identified as Leveillula taurica. The host range was determined by inoculation of Leveillula taurica from tomato on nine species of plants belonging to four different plant families. All cultivars of tomato, eggplant, pepper and cucumber used in this study, showed disease symptoms on their leaf surfaces. Other plant species including potato, alfalfa, sunflower, clover and sainfoin did not get infected by the pathogen. The nucleotide divergence for the rDNA nternal transcribed spacers region between tomato and other 21 Leveillula taurica isolates ranged from 0.00 to 0.031 %. The sequence of ITS region of Leveillula taurica from tomato was identical to eight isolates from different plant species.

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