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A liquid chromatography-electrospray tandem mass spectrometry was developed for the determination of trace amount of abscisic acid in plant samples.

脱落酸是植物体内产生的一种植物激素,它参与调控植物的生理过程[1],其主要作用是促进芽休眠、叶子脱落,抑制生长。

In this paper, the special life form of alpine and arctic plants are analyzed with data from many study fields such as plant ecology, plant physiology, aerography and so on and regarded it as a major adaptive mechanism.

本文以植物生态学、植物生理学、气象学等学科资料,分析了高山和北极植物的特有生活型,并认为它是一种主要的适应机制。

Love was the maternal donor of the polyploid Elymus; the "Y" genome existed in the StY-genome Elymus may be differentiated from the St genome, i.e., the autopolyploid StSt-genome species probably experienced genomic differentiation within a species after autopolyploidy, leading to the significant genomic change and resulting the StY-genome allotetraploids; the StY genome species distributed in the Central Asia with a high level of genetic diversity radiated to the Western and Eastern Asia, under the environmental selection and other factors, and only a few species spread to the western Asia and most species have remained in the Central and eastern Asia.

3分子证据表明在StY基因组的物种之间有明显的地理分化,中亚可能是StY基因组披碱草属植物的分化中心,并在此基础上,StY基因组的披碱草属植物向东亚和西亚进行了快速的辐射,形成了现代StY基因组物种的分布格局;多次杂交、迁移和分化是StY基因组的披碱草属植物进化的主要动力。(4)拟鹅观草属物种可能是所有披碱草属植物的母本供体。

We infer that the bryophyte-like fossil could be the ancestor of bryophyte. The discovery provides a new lead for further study on the origin and evolution of bryophyte or land plant.

推测它是藓类植物祖先,它为进一步研究藓类植物和陆生高等植物的起源和演化提供了新的线索。

Show model combines growth model, math model and VR technologies to design the proper object structure of each organ of virtual plant. First of all,research background, research content of virtual plant area and Virtual Reality technology are introduced. The concept of VR and research content of virtual plant are defined. Secondly, we analyze math model of virtual plant, including Bezier curve, NURBS curved surface, fractal system, L-system and Catenary curve. Thirdly, we give show model of virtual plant in detail. Finally, the design of the platform and growth model on XML script is introduced , and how to show the virtual plant in the platfrom is discussed too.

本文首先介绍了虚拟植物领域的研究背景、研究内容和虚拟现实技术,明确了虚拟现实的概念和虚拟植物的研究范畴,然后介绍了虚拟植物器官的数学模型,对各个器官展开了拓扑结构分析,建立有针对性的数学模型,先后介绍了Bezier曲线,NURBS曲面,分形系统,L-系统和悬链线曲线,接着详细分类介绍了虚拟植物器官的显示模型,最后介绍了虚拟作物平台的设计,平台中基于XML脚本的生长模型,以及虚拟作物在作物平台中的显示。

Ficus species of the flower stalk and strangle the phenomenon of Melastomataceae plant drip tip phenomena are visible, orchid, fern Branch epiphytes more.

榕属植物的茎花及绞杀现象、野牡丹科植物的滴水叶尖现象均可见,兰科、蕨科附生植物多。

The phytoplankton biomass altered from 4.22 mg/L to 22.31 mg/L, averaging 12.29 mg/L. The diversity index of the phytoplankton (H =0.96) was relatively low. The zooplankton identified belongs to 19 species, and its biomass ranged from 3.75mg/L to 7.74mg/L, averaging 5.93mg/L. The diversity index of the zooplankton was relatively low too. In the cultured rice fields, the phytoplankton identified belonging 53 gena, 6 phyla.

在网箱养鳝塘中,共检出浮游植物40属,隶属于7个门;浮游植物生物量变化在4.22mg/L-22.3mg/L之间,平均为12.29mg/L;浮游植物的多样性指数相对较低(H=0.96);共检出浮游动物19属,其生物量变化在3.75mg/L-7.74mg/L之间,平均为5.93mg/L;浮游动物的多样性指数(0.80)也相对较低。

Compartmentalization of Na~+ in vacuole is an important mechanism for plant, especially halophyte, to reduce the toxicity of Na~+.

自1983年第一株转基因植物的获得,开始了利用转基因技术改良植物种性的时代;1985年Horsh等人首创了叶盘转化法,使得农杆菌转化过程大为简化,从此植物基因转化研究得到迅速发展。

This research aims at indicating the influence rule of hydrophyte silt on the nitrogen and phosphorus transformation in soil treatment and restoration systems. Then provide basis for the harvestry in the operation and management of these systems.

为揭示含植物的土地处理与修复系统中植物衰亡对系统中氮和磷转化的影响规律,为此类系统运行管理中植物收割与否提供依据。

The experiment was carried out by hydroponics and with application of ion channel inhibitor TEA at low K+ concentration.

钾是植物细胞中最丰富的离子,是植物必需大量元素之一,在植物的生长和发育中起重要作用[1-4]。

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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。。。。。。