l*****a 发帖数: 38403 | 1 Plants are able to remember information and react to it, thanks to an
internal communications system that can be likened to a central nervous
system in animals, according to a new study by a Polish plant biologist.
Plants "remember" information about light, and a certain type of cell
transmits that information, much like nerves do in animals.
In the study, which was published in the early online version of the
journal Plant Cell July 16, the researchers found that light shone on
one leaf of an Arabidopsis thaliana plant caused the whole plant to
respond. The response lasted even after the light source was taken away,
suggesting the plant remembered the light input.
"The signaling continiues after the light is off; it is building short-
term memory," said the lead author, Stanislaw Karpinski, in an e-mail
message. "The leaves are able to physiologically 'memorize' different
excess light episodes and use this stored information, for example, for
improving their acclimation and immune defenses."
The leaves remember light quality as well as quantity, Karpinski added -
- different wavelengths of light produce a different response,
suggesting the plants use the information to generate protective
chemical reactions like pathogen defense or food production.
As reported by the BBC July 14, scientists found that light shining on a
leaf cell triggered a cascade of events that was immediately signaled to
the rest of the plant via a type of cell called a bundle sheath cell.
Those cells exist in every part of a plant. Karpinski, of the Warsaw
University of Life Sciences in Poland, measured the electrical signals
from those cells, and compared it to finding a central nervous system
for plants.
Terence Murphy, a plant biology professor at the University of
California-Davis who was not involved in the research, said shining
light on that first leaf could have any number of effects.
"The leaf would be loaded up with starch, maybe; that's going to have a
real effect on how it communicates through the phloem (vascular system)
to other leaves. It's not unreasonable that you could illuminate one
leaf and affect the other leaves," he said.
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TAGS
Science, Rebecca Boyle, agriculture, Arabidopsis, environment, memory,
Nervous System, plant biologist, plants The trick is finding out how the
other leaves are informed -- and that's what appears to have been done
in the Polish study. Bundle sheath cells surround the veins in leaves,
stems and roots, so it's reasonable to think they transmit the
electrical impulse, Murphy said.
Biologists have long known that plants can remember -- they need to know
whether they've gone through a cold season before they can germinate in
the spring, for instance. It's not memory as we know it, but a prolonged
change in plant internal systems that causes effects later.
What's more, scientists already know plants transmit electrical signals
in response to a stimulus, just as nerves do. This is easily measured
using a basic electrode setup, according to Murphy.
Karpinski said the light memory represents a new way for plants to
respond to pathogens or disease -- normally, they respond by direct
contact with an invader.
"This information would not be a revelation untill we find that plant
leaves can remember it for several days and process this memorized
information to (bolster) their defense mechanisms against seasonal
diseases," he wrote.
Karpinski is well-known among plant biologists for earlier work on how
plants respond to light stress. In a previous study, he also showed
chemical signals can be passed throughout whole plants, allowing them to
respond to and survive environmental changes. Understanding the
mechanisms that cause those signals is a new step, however.
William John Lucas, distinguished professor of plant biology at UC-Davis
and chair of the plant biology department, said an internal
communication system would provide a wealth of information to different
parts of the plant.
"A particular tissue within a plant needs to be able to signal to the
rest of the plant in terms of what are its conditions, what should you
expect," he said. "If a young leaf is emerging out of a plant, it would
be nice for that leaf to know about the conditions in which it is going
to emerge."
Lucas studies how plants pick up non-biological information, such as
water and light, and how they transmit that information so the entire
plant knows under which constraints it will grow. Plants can't move to a
sunnier, wetter spot, so they need to make the most of their
environment.
Tapping into their "nervous system" would help scientists understand how
they do that, Lucas said. That knowledge could lead to optimized food
crops or hardier trees.
"There are no neurons in plants, but there is a communication network
that we don't fully understand," he said. "There are important
implications for these kinds of studies."
http://www.popsci.com/science/article/2010-07/study-unveils-plant-
nervous-system-illuminating-how-plants-remember-and-react | a**u 发帖数: 8107 | 2 也许学佛的人相信的是佛经的分类(有情和无情)以及符合佛经分类的科研结果
【在 l*****a 的大作中提到】![](/moin_static193/solenoid/img/up.png) : Plants are able to remember information and react to it, thanks to an : internal communications system that can be likened to a central nervous : system in animals, according to a new study by a Polish plant biologist. : Plants "remember" information about light, and a certain type of cell : transmits that information, much like nerves do in animals. : In the study, which was published in the early online version of the : journal Plant Cell July 16, the researchers found that light shone on : one leaf of an Arabidopsis thaliana plant caused the whole plant to : respond. The response lasted even after the light source was taken away, : suggesting the plant remembered the light input.
| l*****a 发帖数: 38403 | 3 呵呵, 尽信书则不如无书
【在 a**u 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 也许学佛的人相信的是佛经的分类(有情和无情)以及符合佛经分类的科研结果
| L**********s 发帖数: 12988 | 4 呵呵,顶这句话。
昨天看了胡茵梦的自传 “生命的不可思议” http://www.ibook8.com/zaixian/huyinmeng/index.htm 有兴趣的话,可以去看看。
在“克里希那穆提的洞见(2)”那一节里,提到了“为学日益,为道日损,损之又损,
以至于无为。无为而无不为” 很心有戚戚焉然啊
【在 l*****a 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 呵呵, 尽信书则不如无书
| o****h 发帖数: 721 | 5 人都相信自己愿意相信的那些东西,胡女士也是有选择地相信道德经和克里希那穆提。
我觉得选择自己喜欢的相信就好了,所谓的信仰不就是这回事吗?如果你学佛,实证永
远是第一,谁都替代不了的,书上那些东西用来印证自己的修行层次就可以了.
【在 L**********s 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 呵呵,顶这句话。 : 昨天看了胡茵梦的自传 “生命的不可思议” http://www.ibook8.com/zaixian/huyinmeng/index.htm 有兴趣的话,可以去看看。 : 在“克里希那穆提的洞见(2)”那一节里,提到了“为学日益,为道日损,损之又损, : 以至于无为。无为而无不为” 很心有戚戚焉然啊
| d**********l 发帖数: 647 | 6 此话差已,难道你要成佛了才相信佛说的?
佛家重视实证,也重视信,信是五根第一根。不信,何谈精进?
要首中道,不可偏执一端。
德经和克里希那穆提。
吗?如果你学佛,实证永
层次就可以了.
【在 o****h 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 人都相信自己愿意相信的那些东西,胡女士也是有选择地相信道德经和克里希那穆提。 : 我觉得选择自己喜欢的相信就好了,所谓的信仰不就是这回事吗?如果你学佛,实证永 : 远是第一,谁都替代不了的,书上那些东西用来印证自己的修行层次就可以了.
| o****h 发帖数: 721 | 7 信仰当然是建立在相信的基础上的阿,信都不信难道能叫信仰?学佛当然得信佛阿,不
信佛谈佛,那叫研究佛学,或者叫八卦。
你觉得第一根就第一根吧。当你天天都可以坚持 做 一件事情的时候,念佛,打坐,哪
怕作瑜珈拜佛,信不信就很无所谓了,信仰已经溶在你的生命里了。这时候关键的不是
你的信,关键是你的证。佛说的那些东西,都可以看成浮云,都是你修行的障碍,就是
刚才那位同修说的,为学日益,为道日损。
【在 d**********l 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 此话差已,难道你要成佛了才相信佛说的? : 佛家重视实证,也重视信,信是五根第一根。不信,何谈精进? : 要首中道,不可偏执一端。 : : 德经和克里希那穆提。 : 吗?如果你学佛,实证永 : 层次就可以了.
| L**********s 发帖数: 12988 | 8 都是缘份
每个人会在适当的时候碰到自己的良师益友,而老师也只不过是一个messenger,他们所讲述的,都是一个真理。所以,真正好的老师,是不会去攻击别的大师的
【在 o****h 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 人都相信自己愿意相信的那些东西,胡女士也是有选择地相信道德经和克里希那穆提。 : 我觉得选择自己喜欢的相信就好了,所谓的信仰不就是这回事吗?如果你学佛,实证永 : 远是第一,谁都替代不了的,书上那些东西用来印证自己的修行层次就可以了.
| p****y 发帖数: 23737 | 9 说得很好,鼓掌!:)
【在 o****h 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 人都相信自己愿意相信的那些东西,胡女士也是有选择地相信道德经和克里希那穆提。 : 我觉得选择自己喜欢的相信就好了,所谓的信仰不就是这回事吗?如果你学佛,实证永 : 远是第一,谁都替代不了的,书上那些东西用来印证自己的修行层次就可以了.
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