Chlorine is a commonly used disinfectant for tomato seed contaminated with the bacterial pathogens causing canker, spot, and speck diseases. Previous research has attempted to determine chlorine effectiveness by testing for the presence of the pathogen after treatment of infected seed lots. Even with the most advanced techniques, the accuracy of these methods is questionable, and can underestim...

the saprophyte fungi such as penicillium are common microorganisms on oak seed that have negative effects on germination. for isolation and identification species of penicillium associated with chestnut-leaved oak (quercus castaneifolia) seed and investigation the effect of moisture on its frequency, during in autumn 2007 four sampling at any region was selected in gorgan province including: sh...

Transgenic resistance to plant pathogens and insect pests, although temporarily on hold for potato because of political reasons, offers promise for the future of both asexually and sexually propagated potato. For a system that exploits both true potato seed (TPS) and transgenic resistance, factors that affect transgene expression during and after gametogenesis must be understood. Gene silencing...

Dihydroflavonol-4-reductase (DFR) is a key enzyme in the catalysis of the stereospecific reduction of dihydroflavonols to leucoanthocyanidins in anthocyanin biosynthesis. In the purple sweet potato (Ipomoea batatas Lam.) cv. Ayamurasaki, expression of the IbDFR gene was strongly associated with anthocyanin accumulation in leaves, stems and roots. Overexpression of the IbDFR in Arabidopsis tt3 m...

The Endosperm Balance Number (EBN) is an important concept for potato breeding and has evolutionary importance in tuber-bearing Solanum species. The EBN is part of the post-zygotic hybridization barriers in the group and represents a reproductive isolating mechanism. Few genes have been proposed to be involved in its genetic control; until now, however, neither specific genes nor its molecular ...

the main purpose of this paper is analyzing sustainability condition for potato cultivation in bahar-hamedan plain. potato farmers population in this plain is 2054 individuals. we obtained sample size, which are 162 by using cochrane’s formula. for increasing accuracy 172 samples fill out the questionnaires. data analyzed by spss software. results showed that sustainability level was low or ver...

Potato tuberworm, Phthorimaea operculella (Zeller), is the most serious insect pest of potatoes worldwide. The introduction of the Bacillus thuringiensis (Bt) toxin gene through genetic engineering offers host plant resistance for the management of potato tuberworm. We report on the field and storage studies to evaluate Bt-cry5 potato lines for resistance to potato tuberworm in Egypt under natu...

The soft rot Enterobacteriaceae (SRE) Pectobacterium and Dickeya species (formerly classified as pectinolytic Erwinia spp.) cause important diseases on potato and other arable and horticultural crops. They may affect the growing potato plant causing blackleg and are responsible for tuber soft rot in storage thereby reducing yield and quality. Efficient and cost-effective detection and identific...

potato tuberworm, phthorimaea operculella zeller (lepidoptera; gelechiidae) is a worldwide pest of solanaceous crops. larvae feed inside galleries in foliage, stems and tubers making chemical control unsuccessful, so other control methods should be applied. in recent years many plants have received genes that encode toxic proteins as a strategy to resist insect pests. in this study, optimal ph ...