Sundew Snags Prey With Fast Tentacles# Animals - 动物园
S*b
1 楼
S*b
2 楼
http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
Many carnivorous plants snag prey by luring them onto sticky surfaces from
which there is no escape. But a common sundew (Drosera glanduligera) from
southern Australia packs a one-two punch. The edges of its spoon-shaped
leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
four times faster than the blink of an eye; when an ant or other small
insect touches a tentacle, it flicks the unsuspecting insect into the center
of the leaf. There, another set of tentacles covered with glue draws the
ant deep into the fold of the leaf where it is digested, researchers report
today online in PLoS ONE. Just one researcher had observed this catapulting
motion in the wild, and only now has it been demonstrated in the lab. The
team raised sundews in a greenhouse, feeding the young plants fish flakes
and, once the plants got big enough, dead fruit flies. When the plants were
mature, the researchers filmed the plant's reactions to live insect visitors
. They also tripped isolated tentacles with nylon thread while filming them
under a microscope to see close-up how they worked. When activated, the
tentacle bends at a hinge near its base; in as few as 75 milliseconds (an
eye blink takes about 350 milliseconds) it catapults toward the leaf's
center. It's not clear what drives this motion, but once flung, the tentacle
can't unwind and be used again, the researchers report. Fortunately,
sundews produce new leaves every few days, so there's always a fresh set of
traps for unsuspecting prey.
Many carnivorous plants snag prey by luring them onto sticky surfaces from
which there is no escape. But a common sundew (Drosera glanduligera) from
southern Australia packs a one-two punch. The edges of its spoon-shaped
leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
four times faster than the blink of an eye; when an ant or other small
insect touches a tentacle, it flicks the unsuspecting insect into the center
of the leaf. There, another set of tentacles covered with glue draws the
ant deep into the fold of the leaf where it is digested, researchers report
today online in PLoS ONE. Just one researcher had observed this catapulting
motion in the wild, and only now has it been demonstrated in the lab. The
team raised sundews in a greenhouse, feeding the young plants fish flakes
and, once the plants got big enough, dead fruit flies. When the plants were
mature, the researchers filmed the plant's reactions to live insect visitors
. They also tripped isolated tentacles with nylon thread while filming them
under a microscope to see close-up how they worked. When activated, the
tentacle bends at a hinge near its base; in as few as 75 milliseconds (an
eye blink takes about 350 milliseconds) it catapults toward the leaf's
center. It's not clear what drives this motion, but once flung, the tentacle
can't unwind and be used again, the researchers report. Fortunately,
sundews produce new leaves every few days, so there's always a fresh set of
traps for unsuspecting prey.
i*s
3 楼
可以养一些在家里
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
y*u
4 楼
和蜘蛛争食吃
【在 i*****s 的大作中提到】
: 可以养一些在家里
【在 i*****s 的大作中提到】
: 可以养一些在家里
y*u
5 楼
换新衣服啦
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
S*b
6 楼
another majia
【在 y**u 的大作中提到】
: 换新衣服啦
【在 y**u 的大作中提到】
: 换新衣服啦
n*2
7 楼
hah
【在 S*********b 的大作中提到】
: another majia
【在 S*********b 的大作中提到】
: another majia
a*a
8 楼
就把你编号为#930。
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
【在 S*********b 的大作中提到】
: http://www.huffingtonpost.com/2012/09/27/carnivorous-plant-sund
: Many carnivorous plants snag prey by luring them onto sticky surfaces from
: which there is no escape. But a common sundew (Drosera glanduligera) from
: southern Australia packs a one-two punch. The edges of its spoon-shaped
: leaves are ringed with up to 18 6-millimeter-long "tentacles" that can move
: four times faster than the blink of an eye; when an ant or other small
: insect touches a tentacle, it flicks the unsuspecting insect into the center
: of the leaf. There, another set of tentacles covered with glue draws the
: ant deep into the fold of the leaf where it is digested, researchers report
: today online in PLoS ONE. Just one researcher had observed this catapulting
I*i
9 楼
对，以第一天露面的日期为准。
【在 a***a 的大作中提到】
: 就把你编号为#930。
【在 a***a 的大作中提到】
: 就把你编号为#930。
相关阅读
浙江渔民捕到须长1米五彩大龙虾 经鉴定为锦绣虾 (转载)看新鸟 --- 天鹅（求具体鸟名）看新鸟 --- 鸭、鹅（求鸟名）惊魂还是惊喜？猎豹跳进车里与游客面对面(组图) zzpuffin,鱼鹰育雏， 熊抓鱼，海象上岸麟凤龟龙 第13-18回爸爸快看，妈妈在对我笑呐蛇为食亡！非洲蟒蛇生吞豪猪 腹部被刺穿后死亡看新鸟 --- 家雀儿（Eurasian Tree Sparrow）俺来给你们演示什么叫“视为己出”麟凤龟龙 第四十三-四十八回今年鱼鹰没下小鱼鹰？[HWPT]英摄影师微镜头下的昆虫造型怪异似恐怖怪物 (转载)推荐个还蛮可爱的壁挂式小鱼缸国宝狮群爬上6米高大树乘凉 惬意睡姿尽显慵懒(高清组图) zz看新鸟 --- 白鹡鸰（White Wagtail）鸟打蛇快把吃的交出来！ (转载)珠颈斑鸠（Spotted Dove）