PLOS Science Wednesday: Hi Reddit, we’re Igor, Steve and Gert and we
sequenced fungus DNA and found banana crops are highly susceptible to
the fungal pathogen and resistant to fungicides, creating unsustainable
growing practices – Ask Us Anything!
Abstract
Hi Reddit, We’re Igor Grigoriev, Steve Goodwin and Gert HJ KEMA, and we
recently published an article titled Combating a Global Threat to a
Clonal Crop: Banana Black Sigatoka Pathogen Pseudocercospora fijiensis
(Synonym Mycosphaerella fijiensis) Genomes Reveal Clues for Disease
Control in PLOS Genetics. Gert HJ Kema, Professor of Tropical
Phytopathology at Wageningen University, The Netherlands, researches
fungal diseases in banana and wheat, with a focus on genetic diversity
and mechanisms of pathogenicity of the causal agents. Igor Grigoriev,
Head of Fungal Genomics program at the U.S. Department of Energy Joint
Genome Institute and Adjunct Professor of Plant and Microbial Biology at
University of California Berkeley, employs genomics tools to explore
fungal diversity for energy and environment science and applications.
Steve Goodwin, Research Plant Pathologist with the Agricultural Research
Service of the U.S. Department of Agriculture and Adjunct Professor of
Plant Pathology at Purdue University, uses genetics, genomics and
bioinformatics approaches to analyze host-pathogen interactions between
wheat and fungal pathogens and to utilize genetic diversity in hosts and
pathogens. The PLOS Genetics article focused on determining the DNA
sequence of the fungus and applies it by focusing on two major aspects
of current banana production: overall susceptibility of the crop and
reduced efficacy of disease control agents (fungicides). The overall
susceptibility of the major export Cavendish banana varieties - that
essentially form one huge monoculture around the globe - is the
underlying problem of the unsustainable banana production. Hence, the
only way to manage black Sigatoka is the use of fungicides. However, due
to the high application frequencies (between 50-70 times per year) their
efficacy continually decreases, which in turn requires more/different
control strategies. Our paper unveils the unsustainable status quo by
showing the need and possibility for developing new and better varieties
with improved disease resistance. This helps growers in the developing
world and meets consumer demands for a caring society. To learn more
about the featured study, read Gert’s PLOS Blogs post on Biologue. See
for another effect of the global banana monoculture the PLOS Pathogens
study Worse Comes to Worst: Bananas and Panama Disease—When Plant and
Pathogen Clones Meet. Also, don’t forget to follow us on Twitter: DOE
Joint Genome Institute and USDA and Wageningen University. Visit us at
www.panamadisease.org and/or subscribe to the newsletter. We’ll be back
at 1 pm EST (10 am PST, 5 pm UTC) to answer your questions, ask us
anything!