手机APP下载

您现在的位置: 首页 > 在线广播 > 科学美国人 > 科学美国人科学系列 > 正文

科学美国人60秒:提高光合作用效率以增加作物产量

来源:可可英语 编辑:aimee   VIP免费外教试听课 |  可可官方微信:ikekenet
 下载MP3到电脑  批量下载MP3和LRC到手机
加载中..
ceIyxF#x_C

Tj@^n*FqQN)l11_vfov

This is Scientific American — 60-Second Science. I'm Steve Mirsky.
"Photosynthesis is surprisingly inefficient, only of the order of one to two percent. And one of the main culprits is an enzyme called RuBisCo."
Laura Barter, a biological chemist at Imperial College, London. Scientific American editor-in-chief Mariette DiChristina recorded these comments when they chatted at the recent World Economic Forum in Davos.
That enzyme RuBisCo? Because it's vital for the first major step in photosynthesis, it's probably the most abundant enzyme on the planet. And it's worked fine for a very long time. But for our needs, we humans want it to work better.
"And I'm very interested in trying to improve upon this enzyme because it's both slow and it also suffers from a lack of specificity. And it can catalyze a reaction with carbon dioxide that you want, but also a competing reaction with oxygen. And, so we're looking at ways that we can enhance the local concentration of carbon dioxide around RuBisCo to increase its efficiency—and ultimately increase crop yield."

w1~jFk|&4+xhQA

增强光合作用效率增加作物产量.jpg
Barter explained how she's trying to do that at a talk she gave at the Forum:
"There are a suite of enzymes that are involved in the capture and release of carbon dioxide and we're synthesizing some molecules that can mimic this behavior. With the hope that they can be sprayed on crops much in the same way as a fertilizer. And will be taken up by the plant and will increase the concentration of carbon dioxide around RuBisCo inside the plant and increase its activity and photosynthetic yields. Now, we have already synthesized this suite of molecules and have shown that they can capture and release carbon dioxide and we're testing their effect on RuBisCo that's been extracted from plants and seeing really, really, exciting results."
For Scientific American — 60-Second Science. I'm Steve Mirsky.

Pkp(i)*n|dXjH

BV#Qv^EfLV%K-!G!8

U%x=cbI2VxlA2A*L5r+ow9D=9GD@c1YYDEF8y[#WZuG3

重点单词   查看全部解释    
imperial [im'piəriəl]

想一想再看

adj. 帝国(王)的,至尊的,特大的
n.

 
vital ['vaitl]

想一想再看

adj. 至关重要的,生死攸关的,有活力的,致命的

联想记忆
photosynthesis [.fəutəu'sinθəsis]

想一想再看

n. 光合作用

 
extract ['ekstrækt,iks'trækt]

想一想再看

n. 榨出物,精华,摘录
vt. 拔出,榨出,

联想记忆
enhance [in'hɑ:ns]

想一想再看

vt. 提高,加强,增加

 
barter ['bɑ:tə]

想一想再看

n. 物物交换,实物交易 v. 物物交换,交换

联想记忆
inefficient [.ini'fiʃənt]

想一想再看

adj. 无效率的,无能的,不称职的

 
fertilizer ['fə:tilaizə]

想一想再看

n. 肥料

 
concentration [.kɔnsen'treiʃən]

想一想再看

n. 集中,专心,浓度

 
planet ['plænit]

想一想再看

n. 行星

 

发布评论我来说2句

    英语学习推荐

    • 英语听写训练
      听写强化训练系统有听写比对,按句停顿,中文翻译、听写错词提示等特色功能.
    • 可可英语微信:ikekenet
      关注可可英语官方微信,每天将会向大家推送短小精悍的英语学习资料..

    科学美国人60秒

    可可英语官方微信(微信号:ikekenet)

    每天向大家推送短小精悍的英语学习资料.

    添加方式1.扫描上方可可官方微信二维码。
    添加方式2.搜索微信号ikekenet添加即可。