Sabtu, 22 Oktober 2011

Historical Mechanisms Promoting Chestnut Survival Through Hybridization




Translating...
>...
>...
>...
>......

in his book, Travels, William Bartram never mentioned any meeting or watching American chestnuts "Castanea dentata," despite extensive research in the southeastern United States, where the trees grow to a much larger number in their native habitat. The mystery of the Bartram made ​​omitting reference to this very important resident of American forests is a mystery that may never be answered. Maps to locate the famous Bartram Philadelphia, PA arboretum and gardens are still actively used today as a tourist attraction documented the presence of chestnut Goliaths in the garden border.


chestnut, due to its 42% starch content, can be the basis of powdered flour, without deterioration for an extended period of time and baked in a sweet, nutritious cake. In Korea, chestnuts are used in food such as potatoes are used in Western countries.


chestnut, due to its 42% starch content, can be the basis of powdered flour, without deterioration for an extended period of time and baked in a sweet, nutritious cake. In Korea, chestnuts are used in food such as potatoes are used in Western countries.

...

of the American chestnut trees were among the highest in the eastern United States, sometimes measuring 17 meters in diameter, large enough to drive a car or carriage way. And nut trees were found growing from Maine to Florida and from the east coast to Central America. Some scattered groves of chestnut can be found in the western državama.Grandness and loveliness of this amazingly beautiful tree is a very desirable property krajolika.Duge white fringe flowers chestnut developed into a valuable food crop in the U.S. is high, straight tree trunk was ideal for many uses because was simply divided by the grain of wood and Split-rail ograda.Gustoj forest was strong and extremely resistant to decay, making it ideal for telephone poles, fence posts, and other building materials.

...

a great gift for the new world of American chestnut trees provided food, shelter, shade, and timber resources, but it was all gone when the tree fell victim fungus infection ", Cryphonectria parasitica," in the year 1904th Many years ago, USDA plant explorer Frank Meyer, noticed a fungal disease, later identified as the chestnut blight, entered U.S. ports in 1876 from China and Japan in the nursery stock imported from those countries. Luther Burbank, perhaps the world's largest plant hybridizer, reported that the number of chestnut trees imported from China and Japan in 1884.USDA official went before Congress in 1912 after a blight decimated the American chestnut trees growing in the Bronx Zoo, and is personally responsible for his efforts to stop further debilitating diseases and plagues imported into the U.S. enactment of Plant quarantine Congress.

...

a great gift for the new world of American chestnut trees provided food, shelter, shade, and timber resources, but it was all gone when the tree fell victim fungus infection ", Cryphonectria parasitica," in the year 1904th Many years ago, USDA plant explorer Frank Meyer, noticed a fungal disease, later identified as the chestnut blight, entered U.S. ports in 1876 from China and Japan in the nursery stock imported from those countries. Luther Burbank, perhaps the world's largest plant hybridizer, reported that the number of chestnut trees imported from China and Japan in 1884.USDA official went before Congress in 1912 after a blight decimated the American chestnut trees growing in the Bronx Zoo, and is personally responsible for his efforts to stop further debilitating diseases and plagues imported into the U.S. enactment of Plant quarantine Congress.

...

a great gift for the new world of American chestnut trees provided food, shelter, shade, and timber resources, but it was all gone when the tree fell victim fungus infection ", Cryphonectria parasitica," in the year 1904th Many years ago, USDA plant explorer Frank Meyer, noticed a fungal disease, later identified as the chestnut blight, entered U.S. ports in 1876 from China and Japan in the nursery stock imported from those countries. Luther Burbank, perhaps the world's largest plant hybridizer, reported that the number of chestnut trees imported from China and Japan in 1884.USDA official went before Congress in 1912 after a blight decimated the American chestnut trees growing in the Bronx Zoo, and is personally responsible for his efforts to stop further debilitating diseases and plagues imported into the U.S. enactment of Plant quarantine Congress.

...

a great gift for the new world of American chestnut trees provided food, shelter, shade, and timber resources, but it was all gone when the tree fell victim fungus infection ", Cryphonectria parasitica," in the year 1904th Many years ago, USDA plant explorer Frank Meyer, noticed a fungal disease, later identified as the chestnut blight, entered U.S. ports in 1876 from China and Japan in the nursery stock imported from those countries. Luther Burbank, perhaps the world's largest plant hybridizer, reported that the number of chestnut trees imported from China and Japan in 1884.USDA official went before Congress in 1912 after a blight decimated the American chestnut trees growing in the Bronx Zoo, and is personally responsible for his efforts to stop further debilitating diseases and plagues imported into the U.S. enactment of Plant quarantine Congress.

...

a great gift for the new world of American chestnut trees provided food, shelter, shade, and timber resources, but it was all gone when the tree fell victim fungus infection ", Cryphonectria parasitica," in the year 1904th Many years ago, USDA plant explorer Frank Meyer, noticed a fungal disease, later identified as the chestnut blight, entered U.S. ports in 1876 from China and Japan in the nursery stock imported from those countries. Luther Burbank, perhaps the world's largest plant hybridizer, reported that the number of chestnut trees imported from China and Japan in 1884.USDA official went before Congress in 1912 after a blight decimated the American chestnut trees growing in the Bronx Zoo, and is personally responsible for his efforts to stop further debilitating diseases and plagues imported into the U.S. enactment of Plant quarantine Congress.

......

Recent observations of the Italian pathologist Antonio Biraghi have shown that some survivors of the European chestnut, C. sativa, is believed to contain an element of the chestnut blight, which is genetically impaired in virulence of the virus inside the extent that effect, called 'hypovirulence, 'seems to indicate that the virus affected chestnut gained a measure of resistance to fungal deadly chestnut blight. These clones are believed by many plant scientists will be able to transfer new immunity to the new C. dentata hybrid crosses with C. sativa and backcrossing to parental genetic types and to evaluate.

...

Tidak ada komentar:

 


Design by: Blogger XML Skins | Distributed by: Blogger Templates