芦荻进行C3类型的光合作用
文章来源:未知 文章作者:enread 发布时间:2016-03-09 06:04 字体: [ ]  进入论坛
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CHAMPAIGN, Ill. -- Arundo donax, a giant reed that grows in the Mediterranean1 climate zones of the world, isn't like other prolific2 warm-weather grasses, researchers report. This grass, which can grow annually3 to 6 meters (nearly 20 feet) in height, uses a type of photosynthesis4 that is more common to crop plants like soybeans, rice and peanuts. The new findings are published in Scientific Reports, a Nature publishing group journal.
 
"Most highly productive grasses, like sugarcane, miscanthus and switchgrass, use these types of photosynthesis called C4, which we know to be very efficient," said study leader , a professor of crop sciences and of plant biology at the University of Illinois. "We confirmed that giant reed uses C3, a less efficient type of photosynthesis, and yet it's really productive. We just had to find out how."
 
The new findings could help scientists improve C3 photosynthesis in other plants.
 
Only a few detailed5 studies have evaluated the productivity of Arundo donax, "but some studies suggest it could produce as much as 60 tons of dry matter per hectare," Long said. "That's about the maximum you'd ever see from Miscanthus x giganteus, also known as giant elephant grass, a C4 grass that, as its name suggests, is considered very productive." 
 
For this reason, Arundo donax has attracted attention as a potential bioenergy crop despite questions about its invasive tendencies.
 
In the new study, the researchers focused on a naturally growing stand of Arundo donax in a mixed, five-acre site in southern Portugal. They measured how quickly the grass took in carbon dioxide and lost water through the pores in its leaves, the amount of chlorophyll in the leaves, how much light upper and lower leaves received or reflected, and how efficiently6 they photosynthesized in high- and low-light conditions.
 
These measurements offered insight into some of the factors that make the plant so productive.
 
"We found first of all that it is a classical C3 plant. It has all the properties of C3 photosynthesis and none of those of C4," Long said.


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1 Mediterranean ezuzT     
adj.地中海的;地中海沿岸的
参考例句:
  • The houses are Mediterranean in character.这些房子都属地中海风格。
  • Gibraltar is the key to the Mediterranean.直布罗陀是地中海的要冲。
2 prolific fiUyF     
adj.丰富的,大量的;多产的,富有创造力的
参考例句:
  • She is a prolific writer of novels and short stories.她是一位多产的作家,写了很多小说和短篇故事。
  • The last few pages of the document are prolific of mistakes.这个文件的最后几页错误很多。
3 annually VzYzNO     
adv.一年一次,每年
参考例句:
  • Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
  • They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
4 photosynthesis A2Czp     
n.光合作用
参考例句:
  • In apple trees photosynthesis occurs almost exclusively in the leaves.苹果树的光合作用几乎只发生在叶内。
  • Chloroplasts are the structures in which photosynthesis happens.叶绿体就是光合作用发生的地方。
5 detailed xuNzms     
adj.详细的,详尽的,极注意细节的,完全的
参考例句:
  • He had made a detailed study of the terrain.他对地形作了缜密的研究。
  • A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。
6 efficiently ZuTzXQ     
adv.高效率地,有能力地
参考例句:
  • The worker oils the machine to operate it more efficiently.工人给机器上油以使机器运转更有效。
  • Local authorities have to learn to allocate resources efficiently.地方政府必须学会有效地分配资源。
TAG标签: plants carbon reed
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