These diseases are a major concern for the sugarcane industry, so correctly diagnosing which rust is present is key, according to Lisa Castlebury, a mycologist at the ARS Systematic Mycology and Microbiology Laboratory in Beltsville, Md. Accurately distinguishing rust isolates by appearance alone is difficult, since their form and structure are very similar.
The rust known as “orange rust,” different from the standard “brown rust” that is common in U.S. sugarcane production, was found in Florida in 2007. With orange rust, a minimum of three fungicide applications are needed to still achieve acceptable yields, and those applications cost growers an estimated $40 million annually in Florida, the only U.S. cane-producing state that has this rust so far.
The study started as a simple request to Castlebury from ARS research plant pathologist Jack Comstock in Canal Point, Fla. Castlebury led a scientific team to genetically analyze and compare DNA sequences from sugarcane rust fungi. In the study, now in its third year, samples have been also been analyzed with light microscopy to spot the subtle differences between the two rusts. Postdoctoral research associate Linley Dixon at the Beltsville lab also participated in the study.
Castlebury and APHIS mycologist John McKemy identified the new orange rust found in a sugarcane-growing area in Florida, the first find in the Western Hemisphere. Now the study has turned into a global analysis of rust fungi affecting sugarcane cultivars, in collaboration with Comstock and ARS research molecular biologist Neil Glynn in Canal Point. The majority of the sugarcane samples Castlebury receives come from the Americas, Asia, Australia, and, to a lesser extent, Africa.
The results of the scientific team’s genetic sequences have been added to GenBank, the National Institutes of Health’s genetic sequence database, for use by plant pathologists and plant breeders.
ARS is the chief intramural scientific research agency of the U.S. Department of Agriculture. This research supports the USDA priority of promoting international food security.
USDA is an equal opportunity provider, employer and lender. To file a complaint of discrimination, write: USDA, Director, Office of Civil Rights, 1400 Independence Ave., S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice), or (202) 720-6382 (TDD).
Sean Adams | Newswise Science News
Faba fix for corn's nitrogen need
11.04.2018 | American Society of Agronomy
Wheat research discovery yields genetic secrets that could shape future crops
09.04.2018 | John Innes Centre
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.
Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
19.04.2018 | Materials Sciences
19.04.2018 | Physics and Astronomy
19.04.2018 | Physics and Astronomy