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1)  reason of nodule forming
结瘤原因
2)  Nod factor
结瘤因子
1.
Nod factor of rhizobium,a new informational molecule,is lipochitooligosaccharide.
根瘤菌结瘤因子是脂壳寡糖 ,一种新的信息分子。
2.
Nod factors (lipo-chito-oligosaccharides,LCOs) are signal molecules produced by rhizobium in effects of flavonoids secreted by plant roots, play an important role in the process of symbiosis.
结瘤因子(脂壳寡糖,lipo-chito-oligosaccharides,LCOs)是根瘤菌在宿主植物根系分泌的类黄酮的作用下,合成并分泌的一类多糖信号分子,在根瘤菌与植物的共生结瘤过程中起重要作用。
3.
The Rhizobium lipochitooligosaccharide nod factors are external signals which elicit various physiological responses on the roots of host plants, such as root hair cells deforming, cortical cells redividing to form nodule primodium.
结瘤因子是根瘤菌分泌的寡糖,它作为外在信号,诱发宿主植物根部各种生理反应,引起根毛变形,诱导皮层细胞分裂,形成根瘤原基。
3)  nod genes
结瘤基因
1.
The diversity of genetics and plasmids,functions of plasmids,Nod factors,nod genes and exopolysaccharide in Mesorhizobium huakuii were reviewed.
综述了华癸中生根瘤菌(Mesorhizobium huakuii)遗传多样性、质粒多样性、质粒的功能、结瘤因子、结瘤基因、胞外多糖等方面的研究进展。
4)  Nod factors
结瘤因子
1.
Nod factors are a novel general class of signal molecules produced by rhizobia, which play a key function in the initial steps of nodulation.
结瘤因子是由根瘤菌产生的一类信号分子 ,它们在结瘤的起始阶段发挥着十分重要的作用。
2.
Nod factors, which are signalling molecules produced by Rhizobia, are the principal determinants of host specificity in Rhizobium–legume symbiosis.
在根瘤菌与宿主豆科植物形成的共生关系中,根瘤菌分泌的结瘤因子是宿主专一性的主要决定因子。
3.
Nod factors are lipochito-oligosaccharide signal molecules secreted by soil-living rhizobia.
结瘤因子在豆科植物与根瘤菌形成共生的过程中起着重要作用。
5)  Nod gene
结瘤基因
1.
Using column chromatogaphy, TLC and HPLC, from Astragalus sinicus seed we isolated and purified the compounds which can induce the expression of nod genes in Rhizobium astragli (Tables 1, 2).
19种类黄酮或非类黄酮化合物对紫云英根瘤菌结瘤基因表达的诱导活性实验表明,紫云英根瘤菌的结瘤基因可以应答多种诱导咸分,除抽皮素外,还有类黄酮物质毛地黄黄酮(luteolin)、大豆素(daidzein)以及非类黄酮化合物7-羟基香豆素(umbelliferone)和葫芦巴碱(trigonelline)。
2.
Three major types of nod genes have been identified:the"common" nod genes,such as nodABC,which are essential for nodulation,functionally and structurally conserved among all rhizobia thus far studied; host-specificity genes,which are strain-or species-specific and determine the bacterial host range;and finally,the.
根瘤菌可在几种豆科植物上成瘤,结瘤基因(nod基因)赋予这些细菌以寄主专一性的方式诱导瘤的形成。
6)  nodulation genes
结瘤基因
1.
With the research deepgoing, it had been found that the nodulation of Rhizobium no only related with nodulation genes expression and regulation of Rhizobium , but also related with signal of host plant such as flavonoids.
根瘤菌结瘤基因的表达调控在根瘤菌与植物的共生结瘤过程中起着十分重要的作用。
2.
Three hot research directions of rhizobial nodulation genes, i.
简要综述了目前根瘤菌结癌基因研究的3个热点方向,即结瘤因子、nodlD基因的调控和结瘤基因系统发育分析的新进展。
补充资料:根瘤菌结瘤因子
分子式:
CAS号:

性质:又称结瘤因子(nod factor)。Rhizobium、Bradyrhizobium和Azorhizobigm等三属的细菌能侵染豆科植物并形成根瘤。在根瘤形成过程中,共生伙伴之间首先需进行信号物质交换,植物分泌类黄酮到根际,类黄酮与Nod D蛋白结合,进而在转录水平调节其他结瘤基因的表达。这些nod基因的产物(Nod蛋白)控制根瘤菌产生一种胞外信号物质——脂寡聚糖。1995年在俄罗斯举行的第十届国际固氮会议上,将LOS改名为LCO(lipochitin oligosaccharide;脂几丁寡糖)。LCO能引起宿主植物根毛变形、皮层细胞分裂及根瘤的形成,因此被定名为结瘤因子。它的被发现是近年来生物固氮研究的重要进展之一。现已发现人工合成的LCO与天然提取物具有相同作用。LCO对细胞周期有一定的影响。

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