Return of the American Chestnut Return of the American Chestnut
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C perspectivesO & tools toMPAS benefit southern forest resources from the southern research station S issue 11 Return of the American Chestnut The American Chestnut: A Legacy to Come...page 3 Solutions from the Double Helix...page 6 Where Great Forests Once Stood. p a g e 1 4 inside... the science American American chestnut was an important part of everyday life 1 for millions of people almost a century ago, a magnificent Chestnut and tree and an integral component of a forest ecosystem that Beyond provided habitat and abundant food sources for animals by Jim Reaves and Zoë Hoyle and people. Still, why should we devote research time and money to a tree that’s now mostly a memory? The American In 1983, a group of scientists who had long believed 3 that there was a strong chance of reviving the American Chestnut: a chestnut formed The American Chestnut Foundation with legacy to come the sole purpose of restoring the tree to its native forests. by Meghan Jordan Solutions from SRS geneticist Tom Kubisiak has worked with The 6 American Chestnut Foundation on just about every aspect the Double of their restoration program, from charting the genetic Helix diversity of the American chestnut trees still living to by Zoë Hoyle helping map the genome of the chestnut blight fungus. A Chromosomal The goal of The American Chestnut Foundation’s breeding 11 programs is to transfer Chinese chestnut blight resistance Conundrum to American chestnut while transferring as little Chinese by Zoë Hoyle chestnut genetic material as possible. Producing these blight-resistant hybrids is not as simple as it might seem. Chestnut Cytogenetics, the study of the behavior of chromosomes 13 Cytogenetics: and their effect on heredity, has a long and distinguished Faridi, history that includes several winners of the Nobel Prize. Burnham, and McClintock by Paul Sisco compass—june 2008 Where Great Old photographs on file at the SRS Coweeta Hydrologic 14 Forests Once Laboratory offer a dramatic portrayal of where great forests once stood. In warm summer months, when Stood American chestnut trees cloaked themselves with white by Gary Kuhlmann blossoms, the Southern Appalachian Mountains looked like they were blanketed with snow. Can Chestnuts In spring 2009, the Forest Service will begin planting three 18 generations of hybrid seedlings on national forests in Survive On Their Tennessee, North Carolina, and Virginia. Research forester Own? Stacy Clark, SRS lead scientist for implementing the first by Claire Payne test plantings, works with a range of partners interested in finding out what will help chestnut seedlings survive out in the wild. departments briefs Experimental Forests ....................21 The American The Promise of a 2 10 Science You Can Use! .....................25 Chestnut Foundation ..................... Virus Blighted ................................... Mighty Giants ...................................... 2 A Prolific and Around the Station .......................27 Cherokee Uses of Chestnut ......... 3 Nutritious Nut .................................16 New Products ....................................30 The Meadowview Coweeta Hydrologic Research Farms .................................... 4 Laboratory ............................................17 The Way Forward is Back ............... 5 The First Enemy of American Chestnut .........................17 Why American Chestnut? ............. 7 Take a Chestnut Journey Chestnut Blight ................................. 9 Along the Appalachian Trail ....26 Research Work Units .....................42 Cover photo: Photo showing the three distinctive nuts contained in the American chestnut burr. (Photo by Joe Schibig, courtesy of The American Chestnut Foundation) Email: [email protected], [email protected] communication of program information (Braille, large print, Telephone: 828-257-4388 audiotape, etc.) should contact USDA’s TARGET Center at C OMPASS Editors: Zoë Hoyle, Science Writer, and Claire Payne, (202) 720-2600 (voice and TDD). Technical Information Specialist Science You Can Use! Art Director: Rodney Kindlund To file a complaint of discrimination, write to USDA, Contributing Staff Writers: Carol Whitlock, Livia Marqués, Director, Office of Civil Rights, 1400 Independence Avenue, June 2008 — Issue 11 and Wilma Fant SW, Washington, D.C. 20250-9410, or call (800) 795- perspectives and tools to benefit southern forest resources 3272 (voice) or (202) 720-6382 (TDD). USDA is an equal The mission of the Southern Research Station is to create opportunity provider and employer. the science and technology needed to sustain and OMPAS is published by the Science Delivery Group of C S enhance southern forest ecosystems and the benefits The use of trade or firm names in this publication is for the Southern Research Station (SRS), Forest Service, U.S. they provide. reader information and does not imply endorsement Department of Agriculture. As part of the Nation’s largest by the U.S. Department of Agriculture of any product or forestry research organization—Forest Service Research The U.S. Department of Agriculture (USDA) prohibits service. and Development—SRS serves 13 Southern States and discrimination in all its programs and activities on the basis beyond. The Station’s 130 scientists work at more than of race, color, national origin, age, disability, and where The opinions and recommendations offered by guest 20 units located across the region at Federal laboratories, applicable, sex, marital status, familial status, parental authors and interviewees are not necessarily those of the universities, and experimental forests. status, religion, sexual orientation, genetic information, U.S. Department of Agriculture, the Forest Service, or the political beliefs, reprisal, or because all or part of an Southern Research Station. Future issues can be obtained by returning the postcard individual’s income is derived from any public assistance included in this issue. program. (Not all prohibited bases apply to all programs.) ISSN: 1931-4906 Persons with disabilities who require alternative means for Printed on recycled paper Printed with soy ink www.srs.fs.usda.gov An American chestnut tree in West Salem, WI, planted outside the chestnut’s natural range in the early 1900s by settlers. Under the tree are, from left: TACF president and CEO Marshal Case, Dr. Cameron Gundersen, and Bruce Gabel. (Photo courtesy of Daphne Van Schaick) compass—june 2008 American Chestnut and Beyond by Jim Reaves and Zoë Hoyle ou might wonder why we would nurtured them spiritually? Since the fungus itself—and its relationship with Ydevote an entire issue of Compass turn of the century, we’ve lost almost a virus—are providing fundamental to the American chestnut. As you all of the magnificent chestnut trees information about how the pathogens will read, American chestnut was an to the chestnut blight. Monumental that invade trees evolve and important part of everyday life for strides have been made to bring these interact among themselves. Another millions of people almost a century trees back to forests. Now that we’ve SRS scientist looks into the very ago, a magnificent tree—tall and been somewhat successful in bringing chromosomes of tree cells to find out spreading—and an integral component these trees back, how can we keep why a particular hybrid won’t grow or of a forest ecosystem that provided them and other foundation species— reproduce. habitat and abundant food sources for those that define a forest—intact in the While other SRS scientists study animals and people. But why should face of further invasions? how well both pure and hybrid we devote research time and money to American chestnut seedlings do on a tree that’s now mostly a memory? “The death of the American a range of sites, they’re gathering The death of the American chestnut chestnut across the the data that will guide the planting across the Eastern United States Eastern United States was of trees in the future. They’re also was just the beginning of a series just the beginning of a adding data to that long-term record of of decimations of great American series of decimations of disturbance and regrowth in American trees by pathogens and pests not great American trees by forests that the Forest Service started native to our climate and ecosystem. pathogens and pests not collecting over a century ago—data These “nonnative invasives,” as we native to our climate and that’s coming into its own in computer call them right now, are brought in ecosystem.” models that predict where best to inadvertently—on landscape plants plant trees after a major disturbance. (or as landscape plants), in shipments Other models are designed for rapid of goods, inside tires, even on the As a result of long years of research risk assessment, to let us know about shoes of travelers. Once here, they’re and the traditional crossbreeding a major invasion such as chestnut unhampered by the organisms that program started by The American blight before it’s too late to do kept them in check in their native Chestnut Foundation (TACF), there anything about it. lands, and can move quickly through will soon be blight-resistant American This issue of Compass celebrates our forests, laying low chestnut, elm, chestnut seedlings (at least 94 percent the 25th anniversary of TACF, itself ash, oak—in some cases, tipping the pure) available for planting throughout the culmination of decades of effort ecological balance toward yet more the tree’s former range. While breeders by thousands of individuals. We invasions.