Posts Tagged ‘trees’

“Methuselah” Seed Sprouts After 2,000 Years

date palm seedsAfter 2,000 years of dozing in the dry heat of the Judean desert, the seed of a date palm has been coaxed back to life. The seed germinated, sprouted, and grew flourishing palm fronds. Now researchers are waiting for the young tree to mature and are hoping fervently that it’s a female, which could bear fruit that would allow botanists to propagate its line.

Back in the ancient era known as the 1960s, archaeologists discovered a handful of wizened seeds in the ruins of King Herod’s fortress in Masada, near the Dead Sea. The seeds were kept on a shelf for 40 years before the Israeli archaeobotanist Mordechai Kislev decided to see if some life remained in the brown husks.

In 2005, Kislev gave the seeds to botanists who soaked them in hot water and nutrients and planted three in enriched soil. Three months later, the dirt cracked and a single shoot appeared. The researchers nicknamed the tiny sapling “Methuselah” after the oldest person whose age is mentioned in the Old Testament [Science News]. (Methusaleh was a whopping 969 years old, per Genesis 5:27.)

(more…)

June 13th, 2008 Tags: , ,
by Eliza Strickland in Environment, Living World | 0 comments | RSS feed | Trackback >

Inside a Tree Leaf, It’s Always a Balmy 70 Degrees

beech tree leafWho knew that a white spruce in northern Canada, a red maple in Pennsylvania, and a mahogany tree in Puerto Rico have so much in common? Their environments are certainly very different, with icy winds buffeting the spruce tree’s needles and hot, humid air bathing the mahogany tree’s leaves. But despite these external variations, a new study shows that inside each tree leaf (or needle) it’s always just the right temperature for the delicate and vital process of photosynthesis, and the leaves are responsible for keeping that thermostat steady.

The findings, published in Nature [subscription required], show that trees all across North America favor the temperature of 70 degrees Fahrenheit for the photosynthesis process, which uses sunlight to convert carbon dioxide into oxygen and sugars. To keep in that comfort zone, they’ve come up with some clever adaptations. Trees release water, and during hot times, that botanical sweat cools them down. And trees that grow in cold places tend to cluster their leaves. These tight formations can affect the rate at which leaves lose heat on cold days, just as fingers pressed together in mittens stay warmer than fingers separated by space in gloves [Science News].

(more…)

June 12th, 2008 Tags: , ,
by Eliza Strickland in Environment, Living World | 0 comments | RSS feed | Trackback >