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科学60秒:植物也有“裙带关系”?

时间: 2020年05月29日 | 作者: Admin | 来源: 领研网(linkresearcher.com)



 [听力全文]


We humans are known to help out members of our own families. When it comes to business we call it nepotism. Now plants have demonstrated the same predilection, in a study published in the American Journal of Botany. 


Previous research showed that plants—in that study they used a plant called the Great Lakes sea rocket—can recognize the root systems of siblings from the same momma plant and will give them a more fair share of nutrients in the soil. 


This new study is the first to look above ground. Researchers at McMaster University in Canada potted North American impatiens. When the plants shared a pot with seeds from the same parent plant, they shared access to light by growing taller with more branches and fewer leaves. But when those same impatiens were planted with other impatiens—but not their siblings—they put more energy into growing more and larger leaves that could crowd out the nonrelatives. 


Researchers say the roots alert plants to the relationship of nearby plants, because when impatiens were planted near siblings but in separate pots, they didn’t recognize their kin. Just goes to show that even in the plant world, family comes first.


—Cynthia Graber 



 [重难点词汇、短语]


nepotism: n. 裙带关系;起用亲戚;任人唯亲

predilection: n. 偏爱,嗜好

sea rocket: n. 海马康草,学名Cakile

kin: n. 亲属



 [参考译文]


众所周知,我们人类会给家族成员提供帮助,在职场中,我们称之为裙带关系。如今,在《美国植物学杂志》(American Journal of Botany)上发表的一项研究中,植物也表现出了同样的行为偏向。


之前的研究表明,植物可以识别来自同一母株兄弟姐妹的根系,并把土壤中更多的养分分给他们。该研究中使用的是一种叫做五大湖海马康草(Great Lakes sea rocket)的植物。


这项新的研究则第一次将目光投向了土壤之上。加拿大麦克马斯特大学(McMaster University)的研究人员将北美凤仙花(North American impatien)进行盆栽,与来自同一亲本植物的种子种在同一个花盆中时,凤仙花会通过长得更高、枝桠更多、叶子更少来共享光照;但如果和其它非兄弟姐妹的凤仙花一起种植时,它们会努力长出更多更大的叶子,试图挤走这些“外花”。


研究人员说,这些植物的根会提醒它们与附近植物之间的关系,因为当种植在兄弟姐妹的附近,但位于不同花盆里时,凤仙花就认不出自己的亲属了。这表明,即使在植物的世界里,“亲戚”也是第一位的。 


翻译 页一