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Wednesday April 16, 2014 MYT 12:00:00 AM
Wednesday April 16, 2014 MYT 9:31:45 AM
by shigemi sato
Surprise yield: Japanese astronaut Koichi Wakata holding a pack of cherry seeds in the International Space Station. A cosmic mystery is uniting monks and scientists in Japan after a tree grown from a cherry stone that orbited the Earth for eight months bloomed years earlier than expected. — Photos AFP
Cherry stone from space station yields tree that has flowered six years ahead of schedule.
A cosmic mystery is uniting monks and scientists in Japan after a tree grown from a cherry stone that orbited the Earth for eight months bloomed years earlier than expected – and with very surprising flowers.
The four-year-old sapling – grown from a cherry pit that spent time onboard the International Space Station (ISS) – burst into blossom on April 1, possibly a full six years ahead of Mother Nature’s normal schedule.
Its early blooming turned on its head the received wisdom of the Buddhist brothers at the ancient temple in central Japan where the tree is growing.
“We are amazed to see how fast it has grown,” Masahiro Kajita, chief priest at the Ganjoji temple in Gifu, told AFP by telephone.
“A stone from the original tree had never sprouted before. We are very happy because it will succeed the old tree, which is said to be 1,250 years old.”
The wonder pip was among 265 harvested from the celebrated Chujo-hime-seigan-zakura tree, selected as part of a project to gather seeds from different kinds of cherry trees at 14 locations across Japan.
The stones were sent to the ISS in November 2008 and came back to Earth in July the following year with Japanese astronaut Koichi Wakata after circling the globe 4,100 times.
Some were sent for laboratory tests, but most were ferried back to their places of origin, and a selection were planted at nurseries near the Ganjoji temple.
By April this year, the “space cherry tree” had grown to around four metres (13ft) tall, and suddenly produced nine flowers – each with just five petals, compared with about 30 on flowers of the parent tree.
It normally takes about 10 years for a cherry tree of the similar variety to bear its first buds.
Exposure to cosmic rays?
“It was an educational and cultural project to let children gather the stones and learn how they grow into trees and live on after returning from space,” said Miho Tomioka, a spokeswoman for the project’s organiser, Japan Manned Space Systems (JAMSS).
“We had expected the tree to blossom about 10 years after planting when the children come of age,” she said.
Kaori Tomita-Yokotani, a researcher at the University of Tsukuba, who took part in the project, told AFP she was stumped by the extraterrestrial mystery.
“We still cannot rule out the possibility that it has been somewhat influenced by its exposure to the space environment,” she said.
Tomita-Yokotani, a plant physiologist, said it was difficult to explain why the temple tree has grown so fast because there was no control group to compare its growth with that of other trees.
She said cross-pollination with another species could not be ruled out, but a lack of data was hampering an explanation.
“Of course, there is the possibility that exposure to stronger cosmic rays accelerated the process of sprouting and overall growth,” she said.
“From a scientific point of view, we can only say we don’t know why.”
Wakata is back aboard the ISS, where he is in command of the station. – AFP
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Science Technology, Science, cherry tree, International Space Station, accelerated flowering
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