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无性繁殖

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In the early life history, podocyst generation and strobilation which determined the number of medusa ultimately, were two important modes of asexual reproduction.

在早期生活史中,螅状体的足囊繁殖与横裂生殖是大型水母无性繁殖的重要方式,对其成体的数量形成至关重要。

A " vegetative propagule" is any type of vegetatively propagated tree.

"营养繁殖体"是无性繁殖树木的任何类型。

Towards the difficulty of breed the Aralia elata , the author explored effect methods of asexual reproduction .

针对龙牙楤木繁殖困难的现况,研究了有效的龙牙楤木无性繁殖方法。

The signal plants by sexual reproduction predominated faintly over ramets in genet population, but accouted for little proportion in clone population, which shows that the ramet has large quantity and has been the main part of population.

目前有性繁殖产生的单生植株在基株种群中还略占优势,但占无性系种群的比例小,表明无性繁殖产生的无性系小株数量大,无性系小株已逐步成为种群的主要组成部分。

In order to investigate the effects of different shading levels (Shading levels were: control 0, 50%, 80%, 90%) on the trade-off relations between sexual reproduction and clonal multiplication of Vallisneria spinulosa, a natural greenhouse experiment was carried out by winter tuber of Vallisneria spinulosa being collected from Poyang Lake in the Jiangxi Province.

以采自江西鄱阳湖的刺苦草冬芽为实验材料,在自然温室中经历了全不遮阳、部分遮阳等4种处理,研究不同遮阳处理产生的光线差异对刺苦草的有性繁殖和无性繁殖方式的资源配制的影响。

With increasing altitude,pollen numberdecreased and length of stylar ramification increased gradually.Increased stylarramification of plants of Saussurea with increasing altitude has importantadaptive significance of evolutionary ecology.It ensured sexsual reproductivesuccess,provided a foundation of hereditary variation and increased specificdiversity.In addition,asexsual reproduction of most species of Saussurea assuredindividual quantity.

根据我们调查,生活在青藏高原东缘的多数风毛菊属植物都具有无性繁殖方式,它保证了风毛菊属植物物种的个体数量,而花柱分枝的变长保证了风毛菊属植物的有性繁殖成功,为风毛菊属植物在该地区的进化提供了遗传变异的基础,增加了风毛菊属植物的物种多样性,使得风毛菊属植物的多数物种都成为该地区的常见种,也可能是青藏高原地区是风毛菊属植物的现代分布中心的原因之一。19。

Only known species of Cycliophora; lives symbiotically attached to a lobster's lip by an adhesive disk and feeding by means of a hairy mouth ring; its complex life cycle includes asexual and sexual phases.

通过带有粘性的圆盘附着共生在龙虾的唇边,通过带毛的嘴环进食;其复杂的生命周期包括无性繁殖和有性繁殖阶段。

Only known species of Cycliophora; lives symbiotically attached to a lobster's lip by an adhesive disk and feeding by means of a hairy mouth ring; its complex life cycle includes asexual and sexual phases.

通过带有粘性的圆盘附着共生在龙虾的唇边,通过带毛的嘴环进食;其复杂的生命周期包括无性繁殖和有性繁殖阶段。像疯狗一样发疯

In order to disclose the adaptive strategies and capacity of Potaninia mongolica Maxim, acquired during its evolution history, the whole response system, which was composed of individual morphology plasticity response, organs anatomy structure response, physiological function response of anti-arid and anti-hotness, activities of protective enzymes response, endogenous hormone adjustment response, sexual reproduction strategies response of seeding, dispreading, sprouting and renewing, asexual reproduction strategies response of clonal growth patterns, clonal growth architectures, clonal growth architectures plasticity, heterogeneous resources utilization strategies, endogenous hormone distribution in clonal organs, foraging behavior, risk-spreading, and resource sharing, individual density allocation patterns response, niche differentiation response, species connection response, allelopathy response and biodiversity components response of the plant was profoundly explored in this paper.The studies come to at least four important results:(1) Taking the sensitive response and evading strategy to adapt to environment stress, Potaninia mongolica Maxim is a successful species has lived through the long-term evolution. Nevertheless, it is narrow climate and soil niche and characteristic of vegetation reproduction which has made the plant a rare and endangered species.

本论文通过对绵刺环境胁迫下个体形态可塑性响应、器官解剖结构响应、抗旱性和抗热性生理功能响应、保护酶系统激活响应、内源激素调控响应,有性繁殖对策中结实、扩散、萌发、更新等生活史过程响应,无性繁殖对策中克隆生长格局响应、克隆生长构型响应、克隆生长构型可塑性响应、克隆生长构型与资源异质性响应、内源激素调控克隆生长构型响应、克隆器官结构与功能响应、觅食行为响应、风险分摊响应、资源共享响应,种群中格局配置响应、生态位分异响应,群落中种间关联、异株克生响应、生物多样性组成响应等内容进行研究,揭示绵刺在进化过程中的适应对策和适应能力,为绵刺保护提供理论依据。

The more degree shaded treatments were, the more biomass was allocated to the below-ground parts, resulting in the less ratios between above-ground and below-ground biomass. Shaded treatments limited sexual reproductive ability of V. spinulosa, which has reproduced less of ramets and winter tubers under shaded conditions versus natural conditions. V. spinulosa adapted the change of light by means of refuging life-history strategy.

随着遮阳强度的增加,刺苦草的最大叶长、总葡匐茎长和总的叶面积减少,遮蔽强度越大,分配到地下的生物量越多,冠根比率越小;遮阳生境下的刺苦草的有性繁殖受限,无性繁殖形成的分株和冬芽也比自然状态少得多;刺苦草采用回避策略应对光照胁迫。

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我不赞成死刑——这是以牙还牙的报复行为。

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