Jurassic Plants Make A Comeback
Makarand writes "BBC News is reporting that
saplings of the Wollemi Pine will go on sale
by the end of 2005. This is the only plant survivor from the Jurassic age. After it was discovered in 1994 in a single
Australian grove, the tree's home has been kept a top secret. Research to find the best way to grow the plants on a
commercial scale has now paid off and the pines are set for a return. As they grow slowly and like low-light conditions they will be marketed as indoor plants." This looks like an interesting addition to any home, even if the article's title is a bit of a misnomer.
Eh? Surely ALL plants we see around us today are survivors from the Jurassic age. Sure, they are descendants, but so is the Wollemi Pine.
Sorry, but my karma just ran over your dogma.
How do we know this is the only plant species to survive? What are the criteria? DNA mutates all the time, so how is this plant different?
.: Max Romantschuk
Everything mutates, but the fittest survives. If the fittest is already well adapted then any mutation must be radical to offer an improvment - or conditions need to change so that the plant/creature is no longer competitive in its ecological niche.
However it isn't necessarily unique. We have also seen the same over shorter periods of time for animals. Think of the coelacanth, for example.
See my journal, I write things there
Specifically it must have beenL. olivacea which I guess means olive colored, since as in the photo it had no markings, it just looked like a beautiful hunk of chalky, greenish colored velvety living stone. Can't believe I found it. Some really bizarre, ugly, and beautiful pics on this page. Also more interesting photos here>/a> and here.
I also am thinking of throwing out the pencil plant (Euphorbia tirucalli) stem which will certainly take root by itself, but apparently causes cancer! I wouldn't want a cat to eat it.
Nearly all the plants we see around us today are species which were not around during the Jurassic age.
;-)
Remember Biologists (by virue or vice of studying this stuff) have very different ideas about what a descendant is.
This is the same species which implies that it could (if we ever figure out that pesky time travel machine) cross breed with the plants growing in the Jurassic age. Modern plants (also descendants, but certainly not of the same species) would not be expected to have this ability.
Or you could look at it like this:
These are the real McCoy, but the modern plants are just cheap knock-offs (and probably Japanese imports to boot too!)
How about my favorite living fossil plant, the genus Equisetum, the horsetail ferns? Also known as scouring rushes, they incorporate silica in their stems and make them feel like sandpaper. This is the only surviving genus of the only surviving family (Equisetaceae) of the only surviving order (Equisetales) of a class (Sphenopsida) that emerged during the Devonian Period, around 375 million years ago, some 200 million years before the Jurassic Period (~175 mya).
So, surrounded by the first land vertebrates, early wingless insects and some animals which would eventually evolve into the arachnids, the Equisetum grew and thrived for 30 million years, and watched the gymnosperms arrive. Another 130 million or so, and Equisetum watched the rise of the dinosaurs. Another 50 million and Equisetum watched the angiosperms (flowering plants) arrive and take over dominance of the plant world, and watched as the ecological shift started to kill off the dinosaurs. 30 million years later, Equisetum watched as the asteroid finished off the dinos and the twitchy little mammals found greatness thrust upon them. Over the next 140 million years, Equisetum watched as the mammals grew tall and short, big and small, flew and crawled and ran and swam.
Recently, Equisetum watched as one bunch of upstart, big-headed mammals learned to control fire, plants, other mammals, and go on to create ceramics, double entry accounting, antibiotics, TiVo and Mr. Coffee. If we think of Equisetum's long residency on Earth as a single year, starting on January 1, then humans showed up around 11:00pm on December 31.
Turn off the computer and go take a walk in the woods, folks. It's an amazing world we live in.
The man who does not read good books has no advantage over the man who cannot read them. - Mark Twain