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salt tolerance mechanism    
相关语句
  耐盐机理
    Many scientists have done their best to solve this problem and have made a lot of encouraging advancements in plant's salt tolerance mechanism, salt tolerance gene cloning and salt stress signal conduction.
    各国科学家都为此做出了不懈的努力,在植物耐盐机理、耐盐相关基因克隆和盐诱导信号传导途径研究等方面取得了许多令人鼓舞的进展。
短句来源
    In this paper, the authors review the progress of the physiology, salt tolerance mechanism, and stress signal transduction of plants under salt stress.
    综述了盐胁迫下植物的生理、耐盐机理、胁迫信号传导等方面的研究进展.
短句来源
  耐盐机理
    Many scientists have done their best to solve this problem and have made a lot of encouraging advancements in plant's salt tolerance mechanism, salt tolerance gene cloning and salt stress signal conduction.
    各国科学家都为此做出了不懈的努力,在植物耐盐机理、耐盐相关基因克隆和盐诱导信号传导途径研究等方面取得了许多令人鼓舞的进展。
短句来源
    In this paper, the authors review the progress of the physiology, salt tolerance mechanism, and stress signal transduction of plants under salt stress.
    综述了盐胁迫下植物的生理、耐盐机理、胁迫信号传导等方面的研究进展.
短句来源
  耐盐机理
    Many scientists have done their best to solve this problem and have made a lot of encouraging advancements in plant's salt tolerance mechanism, salt tolerance gene cloning and salt stress signal conduction.
    各国科学家都为此做出了不懈的努力,在植物耐盐机理、耐盐相关基因克隆和盐诱导信号传导途径研究等方面取得了许多令人鼓舞的进展。
短句来源
    In this paper, the authors review the progress of the physiology, salt tolerance mechanism, and stress signal transduction of plants under salt stress.
    综述了盐胁迫下植物的生理、耐盐机理、胁迫信号传导等方面的研究进展.
短句来源
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  salt tolerance mechanism
The probable relationships between these changes and the salt tolerance mechanism in the plant have been discussed.
      
Role of trehalose synthesis pathways in salt tolerance mechanism of Rhodobacter sphaeroides f.
      


Two near isogenic lines (RH8706 49 and H8706 34)were cultured in Hoagland solution containing 1% NaCl for 36h,48h,60h respectively,and then restored to Hoagland solution without salt for 36h. The chloroplast ultrastructures of the two lines were observed under TEM with different treatments,the results showed that with the intensifying of salt stress,the chloroplasts were injured to a larger degree. The chloroplasts of H8706 34 with less salt tolerance were more sensitive to salt stress;after the removal of...

Two near isogenic lines (RH8706 49 and H8706 34)were cultured in Hoagland solution containing 1% NaCl for 36h,48h,60h respectively,and then restored to Hoagland solution without salt for 36h. The chloroplast ultrastructures of the two lines were observed under TEM with different treatments,the results showed that with the intensifying of salt stress,the chloroplasts were injured to a larger degree. The chloroplasts of H8706 34 with less salt tolerance were more sensitive to salt stress;after the removal of salt stress,the chloroplasts of the more salt tolerant can restore both in their morphology and internal structure,while they could not resume or difficult to restore in RH8706 34. Statistical analysis of the thylakoid membrane injury was also conducted in these two lines,the results showed that most of the thylakoids injured in RH8706 49 melt lightly,while in H8706 34,they melt seriously,which could provide evidence for the superiority of RH8706 49 to H8706 34 in salt tolerance on cell level and also provide good materials for further study on salt tolerance mechanism.

两个近似等位基因系 (RH870 6 4 9和H870 6 34 )在含有 1%NaCl的Hoagland溶液中分别培养36h、4 8h、60h ,再返回到无盐的Hoagland培养液中培养 36h ,用透射电镜对两品系在不同处理条件下叶绿体的超微结构进行了观察。结果表明 :随着盐胁迫程度的加剧 ,叶绿体受伤害程度加重 ,耐盐性较差的H870 6 34的叶绿体对盐胁迫更为敏感 ;盐胁迫解除后 ,耐盐性较强的RH870 6 4 9叶绿体的外部形态和内部结构都得到一定程度的恢复 ,耐盐性较差的品系则恢复不好或难以恢复。对两品系类囊体膜的损伤情况进行统计分析 ,发现RH870 6 4 9的类囊体膜损伤主要表现为微溶 ,H870 6 34主要表现为重溶 ,从细胞水平上为RH870 6 4 9的耐盐性优于H870 6 34提供了证据 ,为进一步研究耐盐机理提供了好材料。

In this article we reviewed and discussed the research advances on the marine higher plant eelgrass (Zostera marina L.) from 5 aspects including (1) characteristics of morphology and anatomical structure, (2) basic physiology, (3)salt_tolerance mechanism, (4) possible growth_limiting factors, (5) questions and expectations. Special emphasis was put on the plant's suitability with its submerged life in seawater, especially its adaptation to the salinity of seawater.

综述和讨论了目前对海洋沉水植物大叶藻的研究进展 ,主要包括 :(1 )形态解剖结构特点 ,(2 )基本生理研究 ,(3 )耐盐机理 ,(4)生存限制因子 ,(5 )问题与展望。其中着重讨论了大叶藻与海洋沉水生活相适应的一些特点 ,特别是其对海水盐度的适应机理。

The United Nations Environment Program estimates that approximately 20% of agricultural land and 50% of cropland in the world is salt stressed. The gene NHX (Na +/H + exchanger) encodes functional protein that catalyzes the countertransport of Na + and H + across membranes and may play an important role in plant salt tolerance. To clone the NHX from the wild plant Populus euphratica collected in Tarim basin and Xinjiang Wujiaqu district into a T vector, designed primer was used to amplify 1kb...

The United Nations Environment Program estimates that approximately 20% of agricultural land and 50% of cropland in the world is salt stressed. The gene NHX (Na +/H + exchanger) encodes functional protein that catalyzes the countertransport of Na + and H + across membranes and may play an important role in plant salt tolerance. To clone the NHX from the wild plant Populus euphratica collected in Tarim basin and Xinjiang Wujiaqu district into a T vector, designed primer was used to amplify 1kb NHX cDNA fragment with RT PCR. Total RNA was extracted from Populus euphratica tissue (plant tissue was collected from Tarim basin and Xinjiang Wujiaqu district and stored in liquid nitrogen) according to the Plant RNA Mini Kits of Omega. First cDNAs were synthesized from 1μg total RNA of Populus euphratica seedling. A pair of primers were used to perform RT PCR. The amplified DNA fragment was purified and cloned into pMD18 T vector. However, 1kb and 2 3kb fragment were obtained from Tarim basin and Xinjiang Wujiaqu district and named as PtNHX and PwNHX , respectively. Sequence analysis reveals that the cloned PtNHX fragment of Populus euphratica contains partial NHX coding region with 98%,86%,84% and 80% identity comparing with Atriplex gemelini, Suaeda maritima, Arabidopsis thaliana and Oryza sativa , respectively. This analysis suggests that NHX gene would be highly conserved in terms of evolution in plant; and it also suggests that the NHX gene of Populus euphratica also would have the similarity with that of Arabidopsis . It may be of great importance in improvement of the plant salt tolerance and breed of crop. At the same time, sequence analysis shows that PwNHX gene includes a coding region about 1350bp with 99% identity comparing with transposon Tn10 IS10 left transposase of Shigella flexneri . On the one hand, the NHX gene may lose its function because it was inserted a fragment in coding region. On the other hand, its product may play a important role in salt tolerance. Populus grow in saline soil. It speculates that it may have other salt tolerance mechanism in Populus. The transposon can be used as transposon tagging to clone other genes and it will help us to understand farther the salt tolerance mechanism.

采用RT PCR扩增的方法 ,从新疆不同地区的野生植物胡杨中分别克隆获得 1kb和 2 3kb的cDNA片段 ,测序和序列分析表明这两个基因片段均包含NHX基因的部分读码框架 ,分别命名为PtNHX和PwNHX。PtNHX序列同源性分析结果显示胡杨NHX基因与滨藜NHX基因同源性高达 98% ,与碱蓬同源性达到 86 % ,与拟南芥同源性为 84 % ,与水稻同源性为 80 % ,表明它是植物中高度保守的一种基因 ,同时说明野生植物胡杨中也存在与拟南芥相似的植物耐盐相关基因。PwNHX序列分析表明 ,该基因内部含有一种转座酶的读码框 ,大小约 135 0bp ,与已发表的Shigellaflexneri.转座子Tn10基因序列 (AF16 2 2 2 3)同源性为 99%。NHX基因的蛋白产物在植物的耐盐性方面起着重要的作用。推测PwNHX由于插入转座酶读码框可能会导致该基因的功能丧失。胡杨生存于盐碱地 ,其体内可能存在另一些机制使胡杨具有抗盐碱的能力。对于这些机制的研究可能有助于进一步了解植物的抗盐机制。利用PwNHX基因内的转座子作基因标签 ,可进一步研究胡杨的其它基因 ,从而有可能揭示胡杨叶子发育的变...

采用RT PCR扩增的方法 ,从新疆不同地区的野生植物胡杨中分别克隆获得 1kb和 2 3kb的cDNA片段 ,测序和序列分析表明这两个基因片段均包含NHX基因的部分读码框架 ,分别命名为PtNHX和PwNHX。PtNHX序列同源性分析结果显示胡杨NHX基因与滨藜NHX基因同源性高达 98% ,与碱蓬同源性达到 86 % ,与拟南芥同源性为 84 % ,与水稻同源性为 80 % ,表明它是植物中高度保守的一种基因 ,同时说明野生植物胡杨中也存在与拟南芥相似的植物耐盐相关基因。PwNHX序列分析表明 ,该基因内部含有一种转座酶的读码框 ,大小约 135 0bp ,与已发表的Shigellaflexneri.转座子Tn10基因序列 (AF16 2 2 2 3)同源性为 99%。NHX基因的蛋白产物在植物的耐盐性方面起着重要的作用。推测PwNHX由于插入转座酶读码框可能会导致该基因的功能丧失。胡杨生存于盐碱地 ,其体内可能存在另一些机制使胡杨具有抗盐碱的能力。对于这些机制的研究可能有助于进一步了解植物的抗盐机制。利用PwNHX基因内的转座子作基因标签 ,可进一步研究胡杨的其它基因 ,从而有可能揭示胡杨叶子发育的变态过程、耐盐碱等性状。

 
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