Uusi tutkimus paljastaa Panda makealle

New study exposes panda sweet tooth

Jonkin sisällä blind taste test, eight out of eight pandas agreesugar is delicious.

In a new study out Wednesday, scientists put the panda taste receptors to the test, wondering whether the cuddly critters would even notice the difference between plain water and the sweet stuff.

Generally speaking, animals that eat plants have a sweet taste receptor because that enables them to detect sugars that are in plants that are sources of calories,” explained Gary Beauchamp, director of the Monell Center that carried out the research.

But unlike most herbivores, pandas stick to one plantbamboowhich is notoriously low on sugar.

So the researchers wondered whetherlike many carnivorous animals, including catspandas had lost their ability to detect sweetness.

Since carnivoresdon’t eat plants, don’t contact sugars, there’s no longer a pressure for them to maintain the sweet receptor functional,” Beauchamp told AFP.

The theory was that bamboo-munching pandas, who also don’t seem to be exposed to much sugar, might also have lost their ability taste sweet things.

Deutsch: Großer Panda im Ocean Park, Hongkong

Deutsch: Großer Panda im Ocean Park, Hongkong (valokuvan: wikipedia)

But it turned out pandas, like other herbivores, still have a fine-tuned sweet tooth.

When given two bowls of liquid, one sweetened and one not, the eight pandas universally slurped down the sugary brew.

The researchers tested a variety of sugars, including fructose, glucose, sucrose, lactose, maltose, and galactose. In all cases, the sweet drink was preferred, and especially the ones with fructose and sucrose, which humans perceive as the sweetest.

The scientists also used cellular analysis to isolate sweet receptor cells from pandas and were able to show they responded to sugars.

They speculate pandas may hold on to working sweet receptor cells because, beyond the taste factor, they may be used in places like the pancreas and the gut to help with plant digestion.

But if pandas love sweets, why do they only eat bamboo?

In captivity, pandas do enjoy sweet foodsincluding Washington’s newest panda cub Bao Bao, Kuka “is apparently relishing sweet potato as a first food during weaning,” sanoi Danielle Reed, who wrote the paper published in the journal PLOS ONE.

But pandas also need lots of bamboo, or they get sick. One hypothesis is that the reedy plant provides something necessary, so evolutionary pressure has led them to rely solely on the plant.

Another possibility being tested, Beauchamp said, is that for pandas, bamboo actually tastes like candy.

Loppujen lopuksi, there is definite evidence different animals experience foods differentlylike artificial sweeteners, joka, for pandas and many other animals, don’t taste sweet.

Repost.Us – Julkaise Artikla
Tämä artikkeli, Uusi tutkimus paljastaa Panda makealle, on syndikoitu AFP ja on lähetetty tänne luvalla. tekijänoikeus 2014 AFP. Kaikki oikeudet pidätetään

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