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科学美国人60秒:提高光合作用效率以增加作物产量

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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."

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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.

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

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adj. 帝国(王)的,至尊的,特大的
n.

 
vital ['vaitl]

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adj. 至关重要的,生死攸关的,有活力的,致命的

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单词vital 联想记忆:
vit生命,al:极其重要的;充满活力的
 
photosynthesis [.fəutəu'sinθəsis]

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n. 光合作用

 
extract ['ekstrækt,iks'trækt]

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n. 榨出物,精华,摘录
vt. 拔出,榨出,

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单词extract 联想记忆:
ex出,tract拉-拔出
 
enhance [in'hɑ:ns]

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vt. 提高,加强,增加

 
barter ['bɑ:tə]

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n. 物物交换,实物交易 v. 物物交换,交换

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单词barter 联想记忆:
读:巴特尔(中国国家篮球队队员)。他来买你的东西可得小心。身高210cm,体重130公斤的力量型中锋,他要是使假币,你敢跟他牛吗?!所以,不要钱,可以要点儿他的背心儿、裤衩儿,鞋呀,袜子呀什么的。我知道你穿不了,但是有升值潜力-以物换物。
 
inefficient [.ini'fiʃənt]

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adj. 无效率的,无能的,不称职的

 
fertilizer ['fə:tilaizə]

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n. 肥料

 
concentration [.kɔnsen'treiʃən]

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n. 集中,专心,浓度

 
planet ['plænit]

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n. 行星

 

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