查询词典 sexual reproduction

In this paper, the sexual reproduction capacity of Orbiliaceous anamorphs derived from ascospores and asexual conidia were evaluated.

本文评估了分离自子囊孢子和分生孢子的圆盘菌科无性型有性生殖能力。

The author proposed that culture of the parental mature Hizikia fusiformis under longer photoperiod would be of benefit to the artificial seedlings through sexual reproduction.

在羊栖菜通过有性繁殖途径进行的苗种生产过程中，较长的光照周期有利于提高苗种生产效率。

To examine the effect of photoperiods on sexual reproduction of sea weed Hizikia fusiformis Okamura, receptacles were collected and incubated in three different light periods.

对羊栖菜的生殖托在不同光照周期条件下进行离体培养，观察卵细胞的释放与受精情况，以及受精卵的发育情况，以探讨光照周期对其有性繁殖过程的影响。

The lack of a safe germinant environment is the primary cause for the failure of P. euphratica sexual reproduction.

缺水所导致的种子安全萌发生境的缺失是额济纳胡杨的有性繁殖失败的首要原因。

Morphology of sexual reproduction abortion in'High Noon', a distant hybridization cultivar of tree peonies(P.delavayi var. lutea×P. suffruticasa), was systematically investigated with light microscopy and cross. The results indicated that:(1)The stamens matured earlier than the gynoecia and pollens dispersed at the early stage of anthesis but the rate of normal 2-celled pollens were merely 2.41%.

采用光镜和杂交等方法对牡丹远缘杂交一代品种'正午'有性生殖败育进行系统形态学观察发现：(1)雄蕊较雌蕊先成熟，初花期即散粉，正常2-细胞花粉仅占2·41%，且花粉在多种培养液中、在自身和其它两种柱头上均不萌发；柱头在谢花期大量分泌粘液，进入最佳授粉状态；(2)同一胚珠中多个大孢子母细胞减数分裂高度不同步，胚囊发育与受精延迟，部分胚乳游离核在细胞化时期分裂异常；(3)自花及品种内异花授粉不结实，天然授粉结实率为0·053‰~0·130‰。

In C. reinhardtii, isogamous sexual reproduction occurs through "plus" and "minus" mating types.

C。 reinhardtii藻的同配有性生殖通过&正&配子和&负&配子结合产生。

Nosema disease is a kind of zoonoses, of all ages can be affected by pollution, for human carinii infection and host immune function of severely inhibited closely related to people before that Nosema without sexual reproduction period .

微孢子虫病是一种人兽共患病，各年龄组均可受染，人类为孢子虫感染与宿主的免疫功能严重地受到抑制有密切关系，以前人们认为微孢子虫无有性生殖期。

A Recently, scientists found that people suffering from AIDS led to chronic diarrhea, called Nosema fungus, infection and other host animals, capable of sexual reproduction, which is expected to help researchers find Their understanding of the "principle" and find a cure for these diseases.

本报讯 最近，科学家发现，导致艾滋病人等罹患慢性腹泻的名为微孢子虫的真菌，在感染人和其它宿主动物时，能够进行有性繁殖，该发现有望帮助研究人员理解其&工作原理&并找到方法治疗上述疾病。

In this paper, Platycodon grandiflorum was studied to explore the method and technology of using heterosis in sexual reproduction medicinal plant, which is to la.

本论文以我国重要中药材桔梗为对象，探索有性繁殖药用植物杂种优势利用需要解决的关键基础问题，为培育药材专用或药食兼用的优良桔梗杂交品种奠定基础。

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。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。