首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow
"Salty" Rice Plant Boosts Harvests British scientists are breeding a new generation of rice plants that will be able to grow
admin
2009-06-15
79
问题
"Salty" Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo, from Sussex University’s School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.
The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 1Om hectares (公顷) of agricultural land are lost because salt gets into the soil and stunts (妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves (红树林) that create swamps (沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透) in. In Latin America, irrigation often causes problems when water is evaporated (蒸发) by the heat, leaving salt deposits behind.
Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.
To overcome these problems, Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants’ growth. They ’have started to breed these characteristics into a new rice crop, but it will take about eight harvests before’ the resulting seeds are ready to be considered for commercial use.
Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food in the poorer countries of the world.
选项
A、They are students at Sussex University.
B、They are rice breeders.
C、They are husband and wife.
D、They are colleagues at an institution of higher learning.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/zjFd777K
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
Rumorsbegantocirculateabouthisfinancialproblems.
LearningDisabilitiesLearningdisabilitiesareverycommon.Theyaffectperhaps10percentofallchildren.Fourtimesasm
LearningDisabilitiesLearningdisabilitiesareverycommon.Theyaffectperhaps10percentofallchildren.Fourtimesasm
TheBiologyofMusicHumansusemusicasapowerfulwaytocommunicate.Itmayalsoplayanimportantroleinlove.Butwhat
Thechangeinthatvillagewasmiraculous.
Thewriter’sattitudetowardnuclearenergyis______.Thefunctionofthelastsentenceisto______.
Parentshavebecomeincreasinglyconcernedaboutthetelevisionviewinghabitsoftheirchildren.
WeightExperimentNicolaWaltershasbeentakingpartinexperimentsinScotlandtodiscoverwhyhumansgainandloseweight.
Mostpeoplehavesimilarideasofwhataphysicistlookslike.Morechildrenwillstudyscienceifitbecomesmoreattractive.
Ourstatisticsshowthatweconsumeallthatwearecapableofproducing.
随机试题
人民法院审理行政案件,以法律和行政法规、地方性法规为依据。地方性法规适用于本行政区域内发生的行政案件。()
试述公共政策问题的:分析方法。
Wecameintothisfieldlate,sowemustworkhardto______thelosttime.
下列各项中属于三级医疗事故的是
大咯血病人发生窒息时,首要的护理措施是
重为W的质点,由长为l的绳子连接,如图所示,则单摆运动的固有圆频率为()。
常用的热轧钢筋牌号有()。
背景我国华北某新建机场A标段在土方施工结束后,施工单位按要求对分项工程进行自检,实测项目的自检结果是压实度合格率为94%,顶面高程和顶面平整度的合格率分别为90%和91%。分项工程的质量检验评定程序是什么?
下列属于体罚学生的情形是()。
HowmanycountriesdidMr.Bellvisitlastsummer?
最新回复
(
0
)