|
Post by rsivertsen on May 2, 2007 15:10:30 GMT
Has anyone tried using wingless fruit flies in order to feed these annual Drosera? Clearly, they grow much better when they feed, just like so many other CPs, It's what they do!
|
|
|
Post by Dave Evans on May 12, 2007 22:03:13 GMT
When I look at the marginal traps on the other two, I see what looks like a hing... Read Siggy's remarks saying they ( D. burmannii/sessilifolia) move the same way the other traps move, so what is the hing for? Does it help speed up the movement of the trap? My understanding of the VFT trap is that outside walls are already shaped as a closed trap, but that the energy level is not high enough to actually cause the movement, rather like a spring that is held in place. After closing, the inside walls grow pushing the trap back open and then the trap is reset by growing the outside walls into the shape of the closed trap (again) even further than the inside surface, creating tension. Are the traps on D. burmannii/sessilifolia and D. glanduligera also reusable? Hey Dave, Well....I'll agree that D. burmannii and D. sessilifolia have very speedy marginal tentacles that bend 180 degrees in a few tens of seconds, but I don't quite think these quite qualify for the catapult trap name. The marginal tentacles of D. glanduligera are comparatively spring-loaded in action! Barry
|
|
|
Post by rsivertsen on May 13, 2007 0:30:39 GMT
I agree Dave, they sure do look like those non-glandular, spathulate shaped "snap-tentacles" that Siggy called them in his DVD video he presented at the Frostburg Md. ICPS Conference last year! – even if they are slower at their function.
|
|
|
Post by shartmeyer on May 14, 2007 11:13:42 GMT
During our experiments on the elongated marginal tentacles without glands, which we called snap-tentacles, only D. glanduligera moved with 0.16 +/- 0.04 seconds. We measured the speed by counting the single pictures of our PAL-video (25pics/second). Also the articulation which connects the broader lower part and the slender upper part of the tentacle stalk is unique for all "snappers". And even the gland less tentacle head is different from those of the obviously most closely related Pygmies (Section Bryastrum/Lamprolepis). The USB-microscope pictures (from our DVD and website) show that clearly. At the left picture we see the articulation (left) and the head-underside in the middle. The right picture shows the thinner tentacle stalk with the upper head side. All other examined species need minimum 40-50 times longer to bend in without articulation but turgor-growth, known also from the VFT. Surprisingly not D. burmannii and D. sessilifolia are with 8-15 seconds the next fastest, the pygmies are much faster. Our champion was D. ericksonae with 4 seconds. The picture below shows D. pulchella. And for comparison the tentacle head of D. sessilifolia.
|
|
|
Post by SilverKiento on May 16, 2007 0:25:04 GMT
Fascinating.. I always thought my glanduligera seedlings died because the photo period was too long and it thought it was summer so it died. Now I just need to start a culture of fruit flies and I'll be set! Oh.. and order more seeds.. Feeding them seems like it should be the most obvious thing to do.. Never even crossed my mind.
|
|
|
Post by mattopel on Jun 11, 2007 17:58:47 GMT
Back in early May, I reported that I was having good luck with D. glanduligera, thanks to the advice of other forum members who recommended heavy feeding. Since then, the plant has flowered, and even set a bit of seed! My plant is pretty much finished now (all the leaves have died, and it's just an inflorescence with a few ripening capsules), but I'm looking forward to trying again in the fall.
-Matt O.
|
|
|
Post by SilverKiento on Jun 11, 2007 20:04:11 GMT
What have you fed yours? I've started a culture of Drosophila melanogaster (wingless fruitflies) since my last try with D. glanduligera and I don't really think that a small glanduligera seedling could successfully catch one. I've tried feeding them to tons of my other seedlings and they ALWAYS manage to escape... strong little buggers they are. One of them even got away from my adelae...
|
|
|
Post by Not a Number on Jun 11, 2007 20:38:01 GMT
Maybe powdered bloodworm will work better for you?
|
|
|
Post by mattopel on Jun 11, 2007 21:42:39 GMT
Whatever was available in the way of very small bugs; mostly fungus gnats and such. They don't have to be alive-- the leaves will react to any protein-containing material that is placed on them. If you've got fruit flies, just stick them in the freezer for a while before feeding them to your sundews. -Matt
|
|
|
Post by SilverKiento on Jun 12, 2007 0:22:10 GMT
Ahh.. right they don't need to be moving, my bad. Freeze 'em I shall! >: D
Thanks.
|
|
|
Post by shartmeyer on Jun 12, 2007 9:38:54 GMT
As shown on our DVD between 2002 and 2005 we used crushed fish food flocks for feeding. That works, but pay attention that the portion is not too big, because the seedlings will soon rot. Meanwhile we use also a "brutal" method: crushing small flies between the fingers to get a "meat-ball". Cut it into small portions with a sharp knife and your seedlings will love it.
|
|
|
Post by Deleted on Jun 19, 2007 16:05:23 GMT
Ahh.. right they don't need to be moving, my bad. Freeze 'em I shall! >: D Thanks. lol...this reminds me of how i feed my snake...cause i only feed him dead mice that have been frozen then reheated...... wait back to the main subject so.... yeah so i tried feeding my plants insects after i froze them but i found that sometimes the leaf died afterwards (i guess it's sort of the same affect of leaving an icecube in your hand and just holding it)...so after a few dead plants i decided to not to simply feed the plant the frozen bugs but to let the bugs thaw first and then feed it to my plants...and since ive been doing that i havent had a plant lose a leaf from me feeding it....
|
|
|
Post by shartmeyer on Aug 27, 2007 12:31:04 GMT
Everybody who likes to grow a new generation of D. glanduligera through the winter, should not wait any longer and sow the seeds now to achieve germination about October/November. And don't forget to feed the seedlings!
|
|
|
Post by Sean Spence on Oct 6, 2007 4:21:14 GMT
In an area of heathland near the town of Anglesea in Victoria, south eastern Australia I found the largest plants of D. glanduligera I’ve ever seen. Individual plants were over 5 cm (2 inches) across. Until now I’d never realised that they could grow as large- despite seeing them in various locations over the past 20+ years. Unfortunately no flowers were open as it was a cloudy, cold and incredibly windy day. Some plants- A friend Julian taking photos of the plants. You might be able to make out a golden rosette beneath his camera. (at least you can in the high resolution photo). To the right you can see the stump of a Pinus radiata that has been cut down in the past. Such trees are common in the area after escaping from nearby plantations. [/quote]
|
|
|
Post by Deleted on Oct 8, 2007 3:55:02 GMT
okay so i just bought some seeds not thinking about when they would normally germinate.....should i still plant the seeds or save them
|
|