plant variation

The variation of leaf type show asymmetric leaves , twist , tip concave , double-vein and so on . Plant variation show plants dwarf , internodes short , several together branches and so on ; So as the radiation dose increase , the height of plants gradually reduce .

叶型变异表现为叶片不对称、扭曲、叶尖内凹、双叶脉等；株型变异表现为植株矮化、节间短、粘连枝等；所以随着辐射剂量的增加植株的高度逐渐降低。

Progress in the study and application of plant somaclonal variation

植物体细胞无性系变异的研究与应用

Research Progress on Plant Somaclonal Variation in Plant Tissue Culture

植物组织培养中体细胞无性系变异的研究进展

Application of Plant Somaclonal Variation in Improvement of Plant Properties

植物体细胞无性系变异在植物性状改良中的应用

Factor analysis for willow 's plant type variation

柳树株型变异的因子分析

Due to plant parameter variation and exterior disturbance , controller design is of vital importance to realize stable suspension .

由于静电陀螺悬浮系统存在系统参数变化和外部扰动的影响，因此悬浮控制系统的设计就成为静电陀螺的关键技术之一。

The major source of plant morphogenesis variation derives from variation in the behaviors of AMs .

植物形态发育模式多样性的主要来源是腋生分生组织行为的不同。

With the requirements on the dynamic behavior during plant parameter variation in mind , a generalized quadratic performance index has been proposed and an optimization problem is constructed for determining the controller parameters .

考虑到控制对象参数变化时对动态特性的要求，提出了一种增广二次型性能指标，并构造了一个最优化问题以确定控制器的参数。

This paper summarized the achievement of types , mechanism , method of selection and identification of plant somaclonal variation , and discussed the actuality and prospects of somaclonal variation application in breeding new varieties .

本文综述了有关植物体细胞无性系变异的类型、机理、筛选与鉴定方法等方面的研究成果，并对其在新品种培育中的应用现状和前景进行了讨论。

Spatial Autocorrelation Analysis of Plant Population Genetic Variation

植物居群遗传变异的空间自相关分析

But in the simple plant type the variation of the insect community had no obvious regularity .

简单植物类型内昆虫群落变化无明显规律性。

The theory , method and application of spatial autocorrelation analysis of plant population genetic variation are reviewed , including method of analysis with the genotype as nominal data and allele frequency as interval data .

本文介绍了植物遗传变异空间自相关分析的理论、方法与应用，包括将基因型作为绝对型数据与等位基因频率作为连续型数据进行自相关分析的基本方法等。

By means of field observation and chromosome identification , the regenerated plant showed significant variation in respects of morphological traits and chromosome numbers . The mutant with salt-tolerance was obtained .

经田间栽培观察和染色体鉴定，再生株外部形态特征和染色体数目皆发生显著变异，获得红豆草耐盐突变体。

The major results are as follow : ( 1 ) Pollen is a more conservative organ in the systematic development of the plant and the variation intensity of the pollen often marks the evolution level of this each .

获得以下结果：（1）花粉粒作为植物系统发育中较保守的器官，花粉粒形态的变异程度往往标志着该物种类群的进化水平。

All the mechanisms and processes in momentum and water and heat exchange between vegetation canopy and the atmosphere are different that is mainly owing to the adjustment . adaptation , and feedback of the plant to the variation of its environment .

由于植物本身的调节适应能力和反馈作用，大气与植被间的动量与水热交换机制和过程不尽相同。

98 plant lines with better variation characteristics were primarily selected from 5677 seedlings of hybrid lines obtained by the natural hybridization .

从定植的5677株菊苗中初选出变异性状良好的株系98个；

The new advances in plant nitrogen nutrient genotype variation are reviewed through morphology , physiology , biochemistry , genetics and molecular biology . And it is practical to improve plant nitrogen utilization efficiency through the breeding program .

从形态学、生理生化、遗传学和分子生物学等方面综述了近年来国内外植物N素营养基因型差异的最新研究成果，并指出通过新品种选育提高植物N素利用效率切实可行。

The paper summarizes the advances and trends in the field , including brief introduction to the structure and function of plant cytoskeleton , low-temperature-induced variation in the stability of plant microtubule cytoskeleton and the discussion of the role of microtubule cytoskeleton in cold signal transmission .

本文综述了该领域研究的进展情况和发展趋势：植物微管骨架的结构和功能的简介，低温诱导植物细胞微管骨架稳定性的变化；并对微管骨架在冷信号传导中的作用进行了探讨。

Different kinds of abnormal chromosomal behavior occurred at its meiosis of the pollen mother cell of the sterile plant including the synaptic variation , univalent , trivalent , chromosome lagging , chromosome hauling , chromosome bridge , chromosome sticking and unequal distribution , etc.

88-428BY-827雄性不育株小孢子母细胞减数分裂的染色体的行为出现了多种类型的异常现象：联会异常、单价体、三价体、染色体落后、染色体粘连、染色体桥、染色体不均等分离等；

Similar bulliform cell is structure of improving plant drought resistance and resisting badness effect from environment , is one of plant appearing avail variation in natural selection ;

拟泡状细胞是提高植物抗旱性和抵御外界不良影响的结构，是自然选择中植物显现的有利变异之一；