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Author Topic: The Fabulous Plant Kingdom  (Read 1492 times)

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AGelbert

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Re: The Fabulous Plant Kingdom
« Reply #30 on: May 05, 2018, 04:01:00 pm »
EcoWatch

Kew’s Temperate House reopens. Photograph: Alicia Canter for the Guardian

World's Largest Greenhouse Reopens to Safeguard Earth's Rarest and Most Threatened Plants

By Lorraine Chow

May. 04, 2018 10:54AM EST

SNIPPET:

The world's largest Victorian greenhouse will reopen its doors Saturday after a five-year, £41 million ($55 million) restoration effort.

The Temperate House, first opened to the public in 1863, is located in the Royal Botanic Gardens at Kew, about 30 minutes from central London.


The greenhouse is home to 10,000 plants from 1,500 species native to Africa, Australia, New Zealand, the Americas, Asia and the Pacific Islands, including some of the rarest and most threatened.

There you'll find the Yellow fatu, a critically endangered perennial plant native to Pitcairn Island, a remote island in the South Pacific. The delicate flower can no longer be found in the wild after a landslide destroyed the last remaining plant.

You'll also see the loneliest plant in the world—a male Wood's cycad. Lead horticulturalist Scott Taylor, who oversees the Temperate House collection, explained to the BBC that the search is still going for a female cycad so Encephalartos woodii can be bred.

"We have a really important job to keep all of these things going," Taylor said. "For some plants that are down to a few individuals in the wild—a wildfire, an earthquake, and they're gone."

Full article: 🌺

https://www.ecowatch.com/endangered-plants-greenhouse-2565840027.html
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if it has not works, is dead, being alone.

AGelbert

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Re: The Fabulous Plant Kingdom
« Reply #31 on: May 13, 2018, 04:39:47 pm »
Leges         Sine    Moribus     Vanae   
Faith,
if it has not works, is dead, being alone.

AGelbert

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Re: The Fabulous Plant Kingdom
« Reply #32 on: May 19, 2018, 01:14:53 pm »
Do Leaves Get Hotter in Sunlight?
🍃
 

Botanists used to assume that the temperature of a photosynthesizing tree leaf would be the same as that of the surrounding air. But a 2008 study published in the journal Nature showed that tree leaves have a built-in climate control system that keeps them at a constant 69.8 degrees Fahrenheit (21.4 degrees Celsius) while they are in the process of converting sunlight, water, and carbon dioxide into food. This temperature stays about the same, whether they are located in frosty Canada or the toasty Caribbean.

A leaf's inner thermostat:

Biologists at the University of Pennsylvania studied 39 tree species that grow within a range of 50 degrees of latitude across North America, between Puerto Rico and Canada.

Quote
“To think that a black spruce in Canada and a Caribbean pine in Puerto Rico have the same average leaf temperature is quite astonishing,  :o” said researcher Brent Helliker.

Plants use several mechanisms to adjust their temperature, from changing the angle of their leaves relative to the sun, clustering leaf growth, or altering evaporation rates.

http://www.wisegeek.com/do-leaves-get-hotter-in-sunlight.htm
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