Author Topic: Ginkgo  (Read 572 times)

hubag bohol

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Ginkgo
« on: May 01, 2013, 05:50:17 PM »
Ginkgo
From Wikipedia, the free encyclopedia


Ginkgo is a genus of highly unusual non-flowering plants, commonly called ginkgo, with one living species, G. biloba. The most recently described extinct species (fossil) is Ginkgo huolinhensis.



Ginkgo biloba Eocene, McAbee, B.C., Canada.

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hubag bohol

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Re: Ginkgo
« Reply #1 on: May 01, 2013, 05:51:43 PM »
Scientific classification

Kingdom:   Plantae
Division:   Ginkgophyta
Class:   Ginkgoopsida
Order:   Ginkgoales
Family:   Ginkgoaceae
Genus:   Ginkgo
Species:
†G. adiantoides
† G. apodes
G. biloba
†G. cranei
†G. digitata
†G. dissecta
†G. gardneri
†G. ginkgoidea
†G. huolinhensis
†G. huttonii
†G. yimaensis

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hubag bohol

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Re: Ginkgo
« Reply #2 on: May 01, 2013, 05:53:03 PM »
The ginkgo is a living fossil, with fossils recognisably related to modern ginkgo from the Permian, dating back 270 million years. The most plausible ancestral group for the order Ginkgoales is the Pteridospermatophyta, also known as the "seed ferns", specifically the order Peltaspermales. The closest living relatives of the clade are the cycads, which share with the extant G. biloba the characteristic of motile sperm.

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Re: Ginkgo
« Reply #3 on: May 01, 2013, 05:54:11 PM »
Modern-day G. biloba grows best in well-watered and drained environments, and the extremely similar fossil Ginkgo favored similar environments; the sediment records at the majority of fossil Ginkgo localities indicate it grew primarily in disturbed environments along streams and levees. Ginkgo therefore presents an "ecological paradox" because, while it possesses some favorable traits for living in disturbed environments (clonal reproduction), many of its other life-history traits (slow growth, large seed size, late reproductive maturity) are the opposite of those exhibited by modern plants that thrive in disturbed settings.

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Re: Ginkgo
« Reply #4 on: May 01, 2013, 06:10:41 PM »
Taking Gingko Biloba Does Not Improve Memory, Study Finds
http://www.sciencedaily.com/


Sep. 21, 2012 — Taking Gingko biloba supplements does not improve memory, attention or problem solving in healthy individuals, according to researchers from the University of Hertfordshire.

The paper, published in Human Psychopharmacology: Clinical and Experimental, is the first meta-analytic review examining the effects of Gingko biloba on healthy people across all age groups. The researchers led by Professor Keith Laws found zero impact on the cognitive functions whatever the age of the people, the dose taken or the length of time of taking Gingko biloba supplements.

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Re: Ginkgo
« Reply #5 on: May 01, 2013, 06:12:31 PM »
Gingko biloba, the oldest tree living species, has been used extensively in traditional Chinese herbal medicine for thousands of years.  Today, it is one of the most widely used plant-based products available without prescription in Europe and North America, where is it marketed as a dietary supplement to treat blood disorders and, more specifically, to enhance memory both for healthy individuals and also for those trying to ward off Alzheimer’s Disease.

Keith Laws, Professor of psychology, said: “Gingko biloba has been widely used for a number of years to reduce the mental decline associated with aging.  But more recently it has been marketed as a memory enhancing supplement for healthy individuals – and it is crucial to establish the validity for such claims.

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Re: Ginkgo
« Reply #6 on: May 01, 2013, 06:15:38 PM »
“Our findings show that taking Gingko biloba supplements at any age to boost memory have no impact at all – and may be a waste of time and money.”

The paper, “Is Gingko biloba a cognitive enhancer in healthy individuals? A meta-analysis”, examines the published research of thirteen randomised control trials of over 1000 healthy individuals across all ages.

Other recently published studies have also shown that there is no evidence to support taking Gingko biloba supplements to protect against developing Alzheimer’s Disease.

:P

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