Plant Protection Science, 2005 (vol. 41), issue 3

Response of Pisum sativum germplasm resistant to Erysiphe pisi to inoculation with Erysiphe baeumleri, a new pathogen of pea

Michal Ondřej, Radmila Dostálová, Lenka Odstrčilová

Plant Protect. Sci., 2005, 41(3):95-103 | DOI: 10.17221/2729-PPS  

Cultivars, homozygous sources and lines of pea (Pisum sativum L.) resistant to Erysiphe pisi had recently been attacked by another powdery mildew species, Erysiphe baeumleri, in the field and in glasshouse conditions. Inoculation with E. baeumleri was carried out in the glasshouse to evaluate the level of resistance of 16 pea genotypes. Susceptible pea lines produced abundant conidia and cleistocarps on petioles and leaves. Only the genotype Tudor (Cebeco 4119) was found to be completely resistant to E. baeumleri. Nineteen pea genotypes (with gene er-1) were tested to natural infection...

Host range and growth of Stem and Bulb Nematode (Ditylenchus dipsaci) populations isolated from garlic and chicory

Ondřej Douda

Plant Protect. Sci., 2005, 41(3):104-108 | DOI: 10.17221/2728-PPS  

Host range and growth of two Ditylenchus dipsaci (Stem and Bulb Nematode) populations on onion, garlic, leek, spinach and chicory were compared. Inoculation was conducted by placing a droplet of 1.5% CMC suspension containing nematodes between the first leaves. The life cycle of the parasite was completed in variants of the original host plants, i.e. salad chicory was infected with the chicory population, and garlic and onion with the garlic population. Survival of the nematodes on garlic and spinach inoculated with the chicory population, and on chicory inoculated with the garlic population was determined. Nematodes of the chicory population...

Enhanced hypericin production in Hypericum perforatum and Hypericum pruinatum in response to inoculation with two fungal pathogens

Cüneyt Çirak, Hasan Murat Aksoy, Ali Kemal Ayan, Saglam Birsen, Kevseroglu Kudret

Plant Protect. Sci., 2005, 41(3):109-114 | DOI: 10.17221/2725-PPS  

Recent years has seen increasing interest in the genus Hypericum because it is the source of a variety of compounds and the biological activities of the genus are mainly derived from its hypericin content. The present study was conducted to determine whether this compound may be implicated as part of an inducible plant defense response in H. perforatum and H. pruinatum. Greenhouse-grown plants were inoculated with the plant pathogens Phytophthora capsici and Diploceras hypericinum. Hypericin levels of the Hypericum species increased significantly in response to inoculation with both pathogens. While...

Protective mechanism in UV-B treated Crotalaria juncea L. seedlings

Veluchamy Balakrishnan, Krishnamoorthy Venkatesan, Konganapuram Chellappan Ravindran, Govindasamy Kulandaivelu

Plant Protect. Sci., 2005, 41(3):115-120 | DOI: 10.17221/2727-PPS  

There is concern that some anthropogenic atmospheric pollutants may result in a global reduction of stratospheric ozone. This would undoubtedly increase the level of ultraviolet radiation reaching the surface of the earth, which might have important biological consequences. The antioxidant defence system of a plant consists of a variety of antioxidant molecules and enzymes. The role of antioxidant enzyme activities in Crotalaria juncea under control without UV-B treatment and ultraviolet-B supplemental radiation (UV-B) was investigated. UV-B treatment for 6 h for 4 days resulted in severe inhibition in catalase activity. On the other hand,...

Entomogist RNDr. Josef Šedivý Celebrates his Jubilee - Biographical Notice

Vladimír Táborský

Plant Protect. Sci., 2005, 41(3):121-122 | DOI: 10.17221/2726-PPS  

Robert J. Henry (editor): Plant Diversity and Evolution: Genotypic and Phenotypic Variation in Higher Plants - Book Review

Aleš Lebeda

Plant Protect. Sci., 2005, 41(3):123-124 | DOI: 10.17221/2730-PPS