天上温室  

Green House in the Sky

作　　者：李昊(译)[1] 

机构地区：[1]郑州大学

出　　处：《英语世界》2022年第7期57-60,共4页The World of English

摘　　要：Outer space offers plant breeders some curious advantages.外太空给植物育种家带来神奇好处。种在太空轨道上的植物失去了舒适且定向的地球引力牵引,通常很难区分上下。这使得它们难以将水和养分输送到身体各处。它们从空气中汲取二氧化碳以供光合作用的能力也遭到破坏。Plants grown in orbit,and thereby deprived of the comforting directional pull of Earth's gravity,typically struggle to distinguish up from down.This makes it harder for them to carry water and nutrients around themselves.It also fouls up their ability to draw carbon dioxide needed for photosynthesis from the air.The stress caused by all this seems to increase the level of genetic mutation induced by a given amount of radiation-of which there is much in space,in the form of cosmic rays and effluvia from the sun.And mutations are the lifeblood of plant breeders.

关 键 词：地球引力 植物育种 外太空 SOME 养分输送 二氧化碳 光合作用 

分 类 号：G63[文化科学—教育学]