Tag Archives: American Chestnut

Ohia & Biotech

Richard Ha writes:

It turns out that ‘ohi‘a dieout is tied to a fungus.

The American chestnut was almost wiped out by a fungus, too. But a biotech solution might save the American chestnut.

Maybe a biotech solution can be found to help with the ‘ohi‘a fungus as well.

From the Hawai‘i Tribune-Herald:

By COLIN M. STEWART
Hawaii Tribune-Herald

Experts call it the single most important tree for the protection and proliferation of native forests across the state.

The ohia is the most widespread, as well as arguably the most beloved and iconic, native tree in Hawaii. And for the last five years, it has been under attack by a troubling new foe that had foresters and scientists scratching their heads.

Until recently.

A scientific paper currently under review reports findings that the disease, known as Rapid Ohia Death, is the result of a fungal pathogen called Ceratocystis, which has been found on other plants here including Okinawan sweet potato and taro. But this is the first instance of it killing ohia.

Read the rest

Biotech Solutions to Bad Problems

Richard Ha writes:

Dr. Michael Shintaku shared this article with me. It’s about a biotech solution to a blight that was threatening the American chestnut. 

American chestnut set for genetically modified revival

16:30 30 May 2014 by Andy Coghlan

The near-extinct American chestnut looks set to make a comeback. Genetically modified trees, which are resistant to a deadly fungus that has decimated the species, have produced the first resistant chestnuts. From these seeds, countless resistant trees could be grown in the wild.

An estimated 4 billion American chestnut trees (Castanea dentata) once covered the US, accounting for a quarter of all US hardwood trees. But in around 1900, a lethal fungus called Cryphonectria parasitica was accidentally imported in chestnut trees from Asia, and by the 1950s it had almost completely wiped out the American chestnut….

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Hopefully, here in Hawai‘i we can be prepared in case a fungus starts killing off all our ‘ohi‘a trees.

The rose apple trees in East Hawai‘i are currently all dying from a fungus; have you noticed? The dying trees are everywhere.

All the mai'a maoli and popoulu cooking bananas, which came from the south way back when with the Polynesian settlers, are gone now, because they got Fusarium Wilt.

Don't we want to have tools that will help us preserve our heritage and other valuable plants?