The Sex Lives of Christmas Trees | Deep Look
The humble pine cone is more than a holiday decoration. It’s an ancient form of tree sex. Flowers may be faster and showier, but the largest living things in the world? The oldest? They all reproduce with cones.
SUBSCRIBE to Deep Look!
DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.
Do pine cones have seeds?
“There are two different types of cones,” says Bruce Baldwin, professor of plant biology at University of California, Berkeley. “There’s seed cones and pollen cones. The pollen cones are relatively tiny. The seed cone gets to be much larger and takes three years to develop and release seeds so you can often see pine cones of three different stages of development on a single tree.”
Why do pine cones open and close?
Early in their development, the scales open slightly for a short time to grant access to wind-borne pollen released from smaller pollen cones. After receiving the pollen, the female cones close back up until the seeds are fertilized and mature. Once they are, the scales reopen allowing the wind to disperse the winged seeds.
What are the oldest living trees?
Conifers are some of the oldest plants in the forest. And they were once much more diverse than they are today. But since the evolution of flowering plants, their diversity has plummeted. Today only about 0.3 percent of all the species of seed plants have cones. Flowering plants have taken over most of the warmer, wetter habitats, pushing out the evergreen conifers.
What are the tallest living trees?
The tallest (coast redwood), most massive (giant sequoia) and oldest living (bristlecone pine) individual organisms is the world are all conifers.
More great Deep Look episodes:
These ‘Resurrection Plants’ Spring Back to Life in Seconds | Deep Look:
The Hidden Perils of Permafrost:
See also another great video from the PBS Digital Studios!
It’s Okay to Be Smart:
Read an extended article on pine cones:
If you’re in the San Francisco Bay Area, You can check out the conifer collections at the University of California, Berkeley Jepson Herbarium:
Or take a stroll through Tilden Regional Parks Botanic Garden to see a variety of California conifers:
Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is supported by HopeLab, The David B. Gold Foundation; S. D. Bechtel, Jr. Foundation; The Dirk and Charlene Kabcenell Foundation; The Vadasz Family Foundation; Smart Family Foundation and the members of KQED.
Xem thêm bài viết khác: https://protectworkingfamilies.com/category/phim/
41 thoughts on “The Sex Lives of Christmas Trees | Deep Look”
flashes back to my childhood when I used to crush pinecones under my feet, blissfully unaware that they were alive 😳
I'm so sorry.
Reminds me of Pineco and Forretress lolol
Um, the oldest and largest living thing on Earth is a fungus.
Wait plants have genders!?
Perfect to watch during the holiday season🤣👌
Their already laid and you are probably single😂lol
Well I knew it but not this DEEP
You can say,
I'm DEEPLY shook
So I just learned that trees seexseesxxxx
Please collab with Temponaut!
Can you make a videoon gingko bilova
Addicted to your videos
The bgm is awesome
please make longer docs😍🥰
I work with spiders and sometimes lack a little inspiration to keep going hahaha can u make more spider videos please? (If about Mygalomorphae would be awesome) love the Chanel <3
i'm a normal human, i see the word sez. i click.
2:01 its free real estate
0:36 the way she said "they're called conifers" she sounded angry
Bruh I collect pinecones 😭😭😭
If that fortress thing was a Pokémon pun I’m all for it.
The way this channel made titles for their video never failed to pique my interest.
Now I find being allergic to pollen weird now
I always thought pine trees were just found more commonly north up because that was their climate, the more you know.
I think I saw the male at my school
The unraveling crowns have two spirals often in Fibonacci sequence. At the early stage the tree grows at near perfect geometry. Where the spirals intersect an event occurs, a pine needle grows.
Wow. I was always fascinated by them as a kid and never really knew why. Thats really awesome. Thanks Deep Look.
You guys are all great! Love these videos!! 🙂
i also love you Amy
i love you Lauren
i didn’t know pine cones could have babies.
This makes you respect conifers a lot more
I didn’t ask for this
in Dalek voice Pine trees will reign SUPREME!!!!! get it? No?
Is this naturefilia?
Awesome voice Amy !
How about bird of paradise?
*EXPOSE* *FLEX AND SEAL*