First Report of Alternaria alternata Causing Stem Blight of Compass Plant (Silphium laciniatum) in Poland

Plant Disease
A Wagner, A Jamiolkowska

Abstract

Compass plant (Silphium laciniatum), like other Silphium species, is a new horticultural plant in Poland. It is grown in gardens and farms as a medicinal, ornamental, and forage crop. For medicinal purposes, leaves, flowers, and rhizomes are harvested. During the summer of 2003, stunted plants with yellowing leaves and reduced inflorescence were observed on fields near Lublin in eastern Poland. Oblong, brown-purplish spots developed on the stems during the month of July. The disease was noticed on approximately 15% of plants. Alternaria alternata was isolated from affected stems onto potato dextrose agar medium. Sterilized seeds of compass plant were sown in sterilized pots with autoclaved soil and maintained at 24°C in a growth chamber with 12 h of light per day. When the plants attained the height of 50 cm, they were artificially inoculated with five isolates of A. alternata obtained from diseased plants collected from the fields near Lublin. Conidial suspensions (1 × 105 per ml) with 0.1% amendment of Tween 20 were brushed on one side of the stems with a beaver hairbrush (20 plants per each isolate). Twenty control plants were treated in the same way but with sterile distilled water with Tween 20. Plants were arranged in a c...Continue Reading

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.