Template-Type: ReDIF-Article 1.0 Author-Name: Michal Ondřej Author-Workplace-Name: AGRITEC, Research, Breeding & Services, Ltd., Šumperk, Czech Republic Author-Name: Radmila Dostálová Author-Workplace-Name: AGRITEC Plant Research, Ltd., Šumperk, Czech Republic Author-Name: Lenka Odstrčilová Author-Workplace-Name: AGRITEC Plant Research, Ltd., Šumperk, Czech Republic Title: Response of Pisum sativum germplasm resistant to Erysiphe pisi to inoculation with Erysiphe baeumleri, a new pathogen of pea Abstract: 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 by E. baeumleri in field screening trials. Only few of them demonstrated a high level of resistance (Fallon, AC Melfort and Joel). Consort R, SGL 2024, SGL 1977 and Franklin were very susceptible to E. baeumleri. Cleistocarps with 1-4× dichotomously branching apices of appendages were formed only on susceptible and very susceptible plants of genotypes SGL 444/2185, Consort R, SGL 2024, SGL 1977, LU 390-R2, Lifter, Highlight, Cebeco 1171 and Carneval R in the field and glasshouse. Susceptible control genotypes without gene er-1 (Komet, Adept and Gotik) were attacked in the trials by E. pisi only. Keywords: pea, pea germplasm, powdery mildew of pea, natural infection, resistance, field and glasshouse screening, Czech Republic Journal: Plant Protection Science Pages: 95-103 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2729-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2729-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200503-0001.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2729-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Ondřej Douda Author-Workplace-Name: Department of Entomology, Division of Plant Medicine, Research Institute of Crop Production, Prague-Ruzyně, Czech Republic Title: Host range and growth of Stem and Bulb Nematode (Ditylenchus dipsaci) populations isolated from garlic and chicory Abstract: 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 did not survive on onion and leek, nor did the garlic population survive on spinach and leek. Nematode infection did not affect the dry weight of aboveground parts of plants, although a reduction would probably occur if the experiments had lasted longer. Symptoms of the infections were apparent in chicory inoculated with the chicory population. Nematodes in the substrate in which the plants were grown were found only in those variants with plants in which the life cycle was completed. Keywords: Ditylenchus dipsaci, vegetable, host range Journal: Plant Protection Science Pages: 104-108 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2728-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2728-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200503-0002.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2728-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Cüneyt Çirak Author-Workplace-Name: Department of Agronomy and Author-Name: Hasan Murat Aksoy Author-Workplace-Name: Department of Plant Protection, Faculty of Agriculture, Author-Name: Ali Kemal Ayan Author-Workplace-Name: The High School of Profession of Bafra, University of Ondokuz Mayis, Kurupelit /Samsun/, Turkey Author-Name: Saglam Birsen Author-Workplace-Name: Department of Agronomy and Author-Name: Kevseroglu Kudret Author-Workplace-Name: Department of Agronomy and Title: Enhanced hypericin production in Hypericum perforatum and Hypericum pruinatum in response to inoculation with two fungal pathogens Abstract: 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 up to now little effort has been made to determine whether hypericin is inducible by pathogen/herbivore attack or if it could play a role in plant defense, the present study indicates that hypericin is a component in inducible plant defense response of H. perforatum and H. pruinatum. Keywords: Hypericum perforatum, H. pruinatum, Phytophthora capsici, Diploceras hypericinum, hypericin, plant-pathogen interaction Journal: Plant Protection Science Pages: 109-114 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2725-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2725-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200503-0003.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2725-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Veluchamy Balakrishnan Author-Workplace-Name: Department of Botany, Faculty of Science, Annamalai University, Annamalai Nagar, India Author-Name: Krishnamoorthy Venkatesan Author-Workplace-Name: Department of Botany, Faculty of Science, Annamalai University, Annamalai Nagar, India Author-Name: Konganapuram Chellappan Ravindran Author-Workplace-Name: Department of Botany, Faculty of Science, Annamalai University, Annamalai Nagar, India Author-Name: Govindasamy Kulandaivelu Author-Workplace-Name: Department of Plant Sciences, Madurai Kamaraj University, Madurai, India Title: Protective mechanism in UV-B treated Crotalaria juncea L. seedlings Abstract: 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, the activities of peroxidase, polyphenol oxidase, superoxide dismutase and phenylalanine ammonialyase increased after the UV-B treatment when compared to control seedlings. These increases could be an adaptive mechanism to minimise the effects of UV-B radiation. Keywords: Crotalaria juncea L., UV-B radiation, antioxidant, catalase Journal: Plant Protection Science Pages: 115-120 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2727-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2727-PPS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/pps-200503-0004.txt Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2727-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Vladimír Táborský Title: Entomogist RNDr. Josef Šedivý Celebrates his Jubilee - Biographical Notice Journal: Plant Protection Science Pages: 121-122 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2726-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2726-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2726-PPS Template-Type: ReDIF-Article 1.0 Author-Name: Aleš Lebeda Title: Robert J. Henry (editor): Plant Diversity and Evolution: Genotypic and Phenotypic Variation in Higher Plants - Book Review Journal: Plant Protection Science Pages: 123-124 Volume: 41 Issue: 3 Year: 2005 DOI: 10.17221/2730-PPS File-URL: http://pps.agriculturejournals.cz/doi/10.17221/2730-PPS.html File-Format: text/html Handle: RePEc:caa:jnlpps:v:41:y:2005:i:3:id:2730-PPS