Plant processes resulting from primary or secondary metabolism have been hypothesized to contribute to defense against microbial attack. Barley chorismate synthase (HvCS), anthranilate synthase alpha subunit 2 (HvASa2), and chorismate mutase 1 (HvCM1) occupy pivotal branch points downstream of the shikimate pathway leading to the synthesis of aromatic amino acids. Here, we provide functional ev...

A powdery mildew was found associated with the coastal wattle, Acacia sophorae, at Tullymorgan, in northern New South Wales, Australia. Morphological characterisation identified it as belonging to genus Erysiphe, while internal transcribed spacer (ITS) sequencing and phylogenetic analysis confirmed Erysiphe quercicola, a pathogen worldwide distribution broad host range. This is first record of ...

Pea is a temperate grain legume cultivated worldwide that can be severely constrained by powdery mildew infection. Control fungicides and the use of resistant cultivars possible, but there growing interest in alternative control methods such as crop diversification, particularly low input agriculture. The aim this work was to assess potential intercropping pea with other crops cultivar mixtures...

powdery mildew, caused by blumeria graminis hordei, is currently the most serious foliar disease of barley in worldwide and reduced barley yield. the use of resistant cultivars is an efficient, economical and environmentally way to control of powdery mildew in barley. in this research a half diallel design was used for genetic analysis of resistance to powdery mildew (bgh) in barley. six barley...

Biotrophic fungal and oomycete pathogens alter carbohydrate metabolism in infected host tissues. Symptoms such as elevated soluble carbohydrate concentrations and increased invertase activity suggest that a pathogen-induced carbohydrate sink is established. To identify pathogen-induced regulators of carbohydrate sink strength, quantitative real-time polymerase chain reaction was used to measure...

Systematic work on the development of winter wheat varieties possessing resistance to a complex most harmful diseases has been carried out in Agricultural Research Center “Donskoy” since early 1970s. During this period, there created large number that possess 3–4 conditions infectious backgrounds pathogens. Due analysis varieties, was identified small resistant powdery mildew. Powdery mildew, c...

The cucurbit powdery mildew fungus Podosphaera xanthii is a major limiting factor for cucurbit production worldwide. Despite the fungus's agronomic and economic importance, very little is known about fundamental aspects of P. xanthii biology, such as obligate biotrophy or pathogenesis. To design more durable control strategies, genomic information about P. xanthii is needed. Powdery mildews are...

Powdery mildew caused by Erysiphe cichoracearum is an important fungal disease which threatens tobacco (Nicotiana tabacum L.) production. The objective of this study was to determine DNA markers linked to genomic regions associated with resistance to powdery mildew in tobacco through the association mapping approach. Seventy tobacco geno-types were fingerprinted using 26 simple se-quence repeat...

To investigate the effects of silicon on the growth characteristics and the reduction of the powdery mildew damage to Zinnia (Zinnia elegans Jacq. ʻMagellanʼ), an experiment was carried out as a factorial experiment in the form of a randomized complete block design with two factors including eight treatments and three replications. The first factor included silicon concentrations at four levels...

Although phytophagous insects and plant pathogens frequently share the same host plant, interactions among such phylogenetically distant taxa have received limited attention. Here, we place pathogens and insects in the context of a multitrophic-level community. Focusing on the invasive powdery mildew Erysiphe alphitoides and the insect community on oak (Quercus robur), we demonstrate that milde...