Study sheds light on microscopic flower petal ridges
文章来源:未知 文章作者:meng 发布时间:2009-12-23 02:54 字体: [ ]  进入论坛

Microscopic微观的 ridges2带钢单向皱纹 contouring the surface of flower petals3 might play a role in flashing that come-hither look pollinating授粉 insects can't resist. Michigan State University scientists and colleagues now have figured out how those form. The result could help researchers learn to enhance plants' pollination4 success and even could lead to high-grip nanomaterials and "green chemical" feedstocks原料.

"Surprisingly, our work on plant surface biochemistry became a birds and bees and flowers story," said John Ohlrogge, MSU University Distinguished5 Professor of plant biology. "It's a fundamental property of plant flowers, and we've discovered a basis of how these ridges are made."

Known for 75 years, the exact biological function and nature of the flower nanoridges still eludes逃避,躲避 scientists. They might help pollinating insects grip petals, and retain glistening7 water droplets水滴 that could attract the visitors. Because the ridges' spacing is approximately that of visible and ultraviolet light紫外线 wavelengths9, moreover, some recent research suggests they produce an iridescent10彩虹色的,闪光的 shimmer微光,闪光 that attracts pollinators.

To start, visiting professor Mike Pollard and former Ohlrogge post-doctoral research associates Fred Beisson and Yonghua Li tapped new genetic12 information to find a mutated strain of the standard research plant Arabidopsis thaliana拟南芥,阿拉伯芥 -- mustard芥菜,芥末 weed. The petals have no such nanoridges because the mutation13 inhibits14 production of a polymer聚合物 that forms the plant cuticle15表皮,角质层, which separates cell walls from plants' waxy16 surfaces.

Examining the mutant plants' flowers and comparing them to normal mustard plants under scanning electron microscopes, the researchers found that the ridges form from cutin角质,蜡状层 polyester聚酯, not from underlying17 surfaces as some have speculated. How that occurs -- from surface folding or uneven18 synthesis综合,合成 of cutin polymer across the cell wall, for example, has yet to be learned.

But the research will open doors to further research based on cuticular19表皮的 nanostructures, the researchers noted20 in latest recent edition of the journal Proceedings21 of the National Academy of Sciences.

"That could include production of polyesters or related basic chemicals by genetically22 manipulating plants or microbes" said Beisson, now at Aix Marseille Université in Saint-Paul-lez-Durance, France.


1 microscopic nDrxq     
  • It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
  • A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。
2 ridges 9198b24606843d31204907681f48436b     
n.脊( ridge的名词复数 );山脊;脊状突起;大气层的)高压脊
  • The path winds along mountain ridges. 峰回路转。
  • Perhaps that was the deepest truth in Ridges's nature. 在里奇斯的思想上,这大概可以算是天经地义第一条了。
3 petals f346ae24f5b5778ae3e2317a33cd8d9b     
n.花瓣( petal的名词复数 )
  • white petals tinged with blue 略带蓝色的白花瓣
  • The petals of many flowers expand in the sunshine. 许多花瓣在阳光下开放。 来自《现代英汉综合大词典》
4 pollination FOGxH     
  • The flowers get pollination by insects.这些花通过昆虫授粉。
  • Without sufficient pollination,the growth of the corn is stunted.没有得到充足的授粉,谷物的长势就会受阻。
5 distinguished wu9z3v     
  • Elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。
  • A banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。
6 eludes 493c2abd8bd3082d879dba5916662c90     
v.(尤指机敏地)避开( elude的第三人称单数 );逃避;躲避;使达不到
  • His name eludes me for the moment. 他的名字我一时想不起来了。 来自《简明英汉词典》
  • But philosophers seek a special sort of knowledge that eludes exact definition. 但是,哲学家所追求的是一种难以精确定义的特殊知识。 来自哲学部分
7 glistening glistening     
adj.闪耀的,反光的v.湿物闪耀,闪亮( glisten的现在分词 )
  • Her eyes were glistening with tears. 她眼里闪着晶莹的泪花。
  • Her eyes were glistening with tears. 她眼睛中的泪水闪着柔和的光。 来自《用法词典》
8 droplets 3c55b5988da2d40be7a87f6b810732d2     
n.小滴( droplet的名词复数 )
  • Droplets of sweat were welling up on his forehead. 他额头上冒出了滴滴汗珠。 来自辞典例句
  • In constrast, exhaled smoke contains relatively large water droplets and appears white. 相反,从人嘴里呼出的烟则包含相当大的水滴,所以呈白色。 来自辞典例句
9 wavelengths 55c7c1db2849f4af018e7824d42c3ff2     
n.波长( wavelength的名词复数 );具有相同的/不同的思路;合拍;不合拍
  • I find him difficult to talk to—we're on completely different wavelengths. 我没法和他谈话,因为我们俩完全不对路。 来自《简明英汉词典》
  • Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。 来自辞典例句
10 iridescent IaGzo     
  • The iridescent bubbles were beautiful.这些闪着彩虹般颜色的大气泡很美。
  • Male peacocks display their iridescent feathers for prospective female mates.雄性孔雀为了吸引雌性伴侣而展现了他们彩虹色的羽毛。
11 shimmer 7T8z7     
  • The room was dark,but there was a shimmer of moonlight at the window.屋子里很黑,但靠近窗户的地方有点微光。
  • Nor is there anything more virginal than the shimmer of young foliage.没有什么比新叶的微光更纯洁无瑕了。
12 genetic PgIxp     
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
13 mutation t1PyM     
  • People who have this mutation need less sleep than others.有这种突变的人需要的睡眠比其他人少。
  • So far the discussion has centered entirely around mutation in the strict sense.到目前为止,严格来讲,讨论完全集中于围绕突变问题上。
14 inhibits 7fbb1ac5e38d9e83ed670404679a2310     
阻止,抑制( inhibit的第三人称单数 ); 使拘束,使尴尬
  • A small manufacturing sector inhibits growth in the economy. 制造业规模太小有碍经济增长。
  • His bad English inhibits him from speaking freely. 他英语学得不好,这使他不能表达自如。
15 cuticle innzc     
  • You'd never puncture the cuticle.你无法刺穿表皮。
  • The reform has hardly made a scratch upon the cuticle of affairs.改革几乎还没有触到事物的表皮。
16 waxy pgZwk     
  • Choose small waxy potatoes for the salad.选些个头小、表皮光滑的土豆做色拉。
  • The waxy oil keeps ears from getting too dry.这些蜡状耳油可以保持耳朵不会太干燥。
17 underlying 5fyz8c     
  • The underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
  • This word has its underlying meaning.这个单词有它潜在的含义。
18 uneven akwwb     
  • The sidewalk is very uneven—be careful where you walk.这人行道凹凸不平—走路时请小心。
  • The country was noted for its uneven distribution of land resources.这个国家以土地资源分布不均匀出名。
19 cuticular 568986bcf485a9b50440a5ec178dce46     
  • Commonly bacterium of gules and cuticular tinea waits. 常见的有红色表皮癣菌等。 来自互联网
  • Cuticular cell organization and embedded material call the skin to protect wet organization jointly. 表皮细胞组织与内含物质共同称为皮肤保湿机构。 来自互联网
20 noted 5n4zXc     
  • The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
  • Jim is noted for arriving late for work.吉姆上班迟到出了名。
21 proceedings Wk2zvX     
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
22 genetically Lgixo     
  • All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
TAG标签: flower ridges petal