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Water stress is one of the most important abiological stress to maize seedling .In this study, we arm to identify the sensitive stage of maize seedling to water stress and select the material which tolerance to flooding. And we use waterlogging tolerance index to identify the sensitive stage of maize seedling. we have studied 20 inbred lines of maize which seedlings under water stress in three stage. The result show that the three leave stage is the most obvious stage to flood stress. In addition, we have analyzed ten of the inbred lines to re-act the waterlogging tolerance index. The result show good re-action. And the result also show that waterlogging tolerance index is a credible index to select waterlogging tolerance materials in seedling.

渍是玉米苗期主要的非生物逆境胁迫之一;本试验通过对20份玉米自交系进行苗期的淹水对照试验,采用了三个处理时期,并利用耐渍系数作为指标进行敏感时期的鉴定,结果表明三叶一心期是淹水的相对最佳时期;同时利用其中10份自交系对耐渍系数的重演性进行了分析,结果表明其重演性很好;同时结果还表明耐渍系数是耐渍性鉴定的一个可靠指标。

Study of effcient regeneration system Through the study of two Lavender cultivars on regeneration system,the author obtainedthe efficient regeneration system of English Lavender and Dentata hybrid Lavender matureleaves.

本研究旨在通过对薰衣草再生体系及农杆菌介导的遗传转化体系的研究,将基因vgb导入到薰衣草中,以期提高薰衣草耐能力和精油产量,同时为利用转基因技术改良薰衣草品种的广泛运用打下基础。

The time of peak value of low frequency u wind isprior to the peak of rainfall in flood years;(3) There are low frequency OLRmoves northward at low-latitude and southward at mid-latitude at the same time inflood years , the join point is between 20-30 N.

3年低频OLR在经向上同时存在由低纬度向北和由中高纬向南的传播,二者交汇在20~30°N之间。旱年则没有显著的汇合区。(4)影响我国东部的低频气旋和反气旋源地在北半球中纬度太平洋和低纬的菲律宾附近。

The discoveries of the hemoglobin genes which encode the hemoglobins related to symbiotic nitrogen fixation in legumes and those not related to symbiotic nitrogen fixation in legumes andnon-legumes including cereals , make reseajrchers have a new look, resulting in two kinds of planthemoglobins: symbiotic and nonsymbiotic hemoglobins.

对这两种血红蛋白的性质、功能、基因结构及表达等方面的研究不仅对共生固氮中植物与微生物的相互关系和固氮工程研究;而且对植物细胞的呼吸代谢和耐机理等研究有重要价值。

This paper studied the effects of water stress on the dynamic variations of malondialdehyde and free proline contents,and of superoxide dismutase,peroxidase and catalase activities in Phellodendron amurense seedlings.

以轻度干旱、重度干旱和水处理黄檗幼苗,测定丙二醛和游离脯氨酸含量及超氧化物歧化酶、过氧化物酶和过氧化氢酶活性的动态变化。

Firstly, influenced by climate, topographical feature, soil and hydrological and geographical features, there was drought, flood, salinification, desertification and barren in Daxing, biological protection is necessary as a protective barrier to control sand from Yong Dinghe River bed Secondly, the windbreak system has features of urban forestry with aesthetic character and reasonable forest structure and arrangement.

首先,受气候、地貌、土壤和水文地质等多种因素制约,旱、、碱、沙、瘠等自然灾害普遍存在,防护林体系的生态环境保护作用应当得到充分体现,要成为首都&南大门&的生态屏障保护及永定河沙地的风沙源控制带。其次,要体现大城市城郊防护林体系的建设特点,布局合理,结构合理,具有一定的风景美学价值。

From the still depths of Lake Malawi to the powerful rushing waters of Victoria Falls, freshwater is Africa's lifeblood, sustaining some of the most resplendent and dramatic gatherings of wildlife; Crowds of spoonbills and black herons corralling fish on the Bangweulu floodplains, giants crocodiles digging ambush for unsuspecting buffalo on the Luangwa River and millions of flamingoes gathered on the caustic soda lakes of East Africa's Rift Vally.

从深遽平静的马拉威湖到滚滚而下的维多利亚瀑布,淡水是非洲的生命之源,养育不少活泼灿烂的野生生物。在班乌拉原,琵鹭与黑鹭围捕鱼群。在卢安瓜河,巨鳄伏击没有疑心的水牛。在东非大裂谷,数百万只红鹳在具腐蚀性的钠湖聚集。

A dog has no use for fancy cars or big homes or designer clothes. A waterlogged stick will do just fine.

狗用不着高档的汽车或是很大的家和漂亮的衣服,有根阿棒就好了注:狗咬胶,电影里出现过。

The paper puts the drainage modulus theory system of short-term stopping storage theory calculation in waterlogging region based on the condition of design storm rainfall and design flood.

本文提出了基于设计暴雨、设计洪水条件下,应用短期停蓄法原理计算区排水模数理论体系。

ARIMA model was used to fit and forecast the succession grading series of the waterlogged lowland in Honghu City, and the result showed that this model was better in fitting and forecasting the change trend of succession grading of waterlogged lowland.

结果表明,ARIMA模型能较好地拟合并预测渍地演替级数的变化趋势。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。