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Composition of both spermatophyte and pteridophyte flora of a relict Alsophila spinulosa community in Wutongqiao Nature Reserve of Leshan region was discussed. It shows the proportion of Tropic and Cathaysia elements in both spermatophyte flora and pteridophyte flora was almost 2/3 of the total at the genus level, and even more at the family level. There was a distinct ancient endemism phenomenon in spermatophyte flora, owning to being 8 relict and remnant endemism genera in the total of 9. Furthermore, the proportion of Tropic and Cathaysia elements both at family and genus level in the pteridophyte flora were much greater.

选以乐山五通桥桫椤自然保护区-桫椤群落的种子植物区系与蕨类植物区系组成为研究对象，发现种子植物区系在属的水平上热带成分与古华夏成分占到近2/3，在科的水平上则更高；种子植物区系中有9个中国特有属，其中8个为残遗或原始类型的古特有属，表现出典型的古特有现象；而在蕨类植物区系中热带成分和华夏成分所占比重更大。

Greenhouse experiments were conducted to study (1) response of seed germination and seedling emergence to depths of sand burial in Caragana microphylla Lam.

由于这两个种的种子萌发是光敏感的，所以它们的种子萌发受土壤含水量和光照强度二者之间的平衡调节。2 cm的较浅沙埋最有利于种子萌发和出苗。

What's worse, they think that the temperature condition is not necessary for seeds to come into leaf and that plants can also grow well without fertilization.

学生对於植物生长的另有概念包括将根与茎的名词定义错误，认为植物是「先长茎再长根」或「先长果实，后开花」；并对植物器官的功能不熟悉；缺乏植物的「花」、「果实」具有传宗接代等繁殖概念；「温度」条件对种子发芽而言是非必要的；植物有「施肥」就长得更好，没有施肥也不会怎样；知道植物可以用种子繁殖，除了种子以外可以繁殖的器官学生多数只看过落地生根用叶子繁殖，缺乏更多的实际经验。

The results showed that the loss of desiccation tolerance of imbibed mung been seeds was a quantitative feature, and that the changes in desiccation tolerance of imbibing orthodox seeds could serve as a model system for the study of seed recalcitrance.

这些结果表明，吸胀的绿豆种子脱水耐性的丧失是一种数量特征，吸胀的正常性种子脱水耐性的变化可以作为种子顽拗性研究的一个模式系统。

The viewpoint that seed recalcitrance is a compound quantitative trait is a new and further cognition, which will be a help for studying causes and resolve of seed recalcitrance on species-specific basis.

种子顽拗性的复合数量性状特征的提出及其三个层面的划分，有助于加深对种子顽拗性的认识，并用以指导我们在实践中解决种子顽拗性方面的具体问题。

Degradation strongly influences the presence of tolerative species in the seed bank and the vegetation, but it were less role to ruderal species.

我们认为：1土壤种子库拥有大量早期演替阶段的物种；2条件耐受性物种通常缺乏种子库；3退化强烈的影响了条件耐受性物种，而对杂草性物种的影响不大；4土壤种子库对青藏高原高寒草甸的恢复具有重要的贡献。

The result showed that the growth of subaerial parts of plant community isn't obviously isochronous with the seed bank. So the inherent potential of soil seed bank has important influence on the regeneration of forest and the dynamic succession of plant community.

另外，种子库中优势成分与取样地点地面植被相应层次的优势种存在较大差异，说明植物群落地上部分的发育与其它地下部分的土壤种子库的发育具有明显的不同步性，这一结果表明土壤种子库的内在潜力对森林更新及植物群落演替动态产生了重要影响。

Otherwise, the predominant components in the seed bank are different from the subaerial predominant vegetation at correspond layer. The result showed that the growth of subaerial parts of plant community isn't obviously isochronous with the seed bank. So the inherent potential of soil seed bank has important influence on the regeneration of forest and the dynamic succession of plant community.

另外，种子库中优势成分与取样地点地面植被相应层次的优势种存在较大差异，说明植物群落地上部分的发育与其它地下部分的土壤种子库的发育具有明显的不同步性，这一结果表明土壤种子库的内在潜力对森林更新及植物群落演替动态产生了重要影响。

Bored into the middle of a snow-topped Arctic mountain in Longyearbyen, Norway, the seed valut has as its goal the storing of every kind of seed from every collection on the planet.

这个种子库座落在北极地区挪威朗耶比恩的一座冰雪覆盖的山脉中。正如它的目标一样，这个种子库存储了地球上能收集到的每一种植物的种子。

In maize, the results indicated that the patterns of gene expression altered obviously in cross-fertilized kernels as compared to self-fertilized kernels, major difference of gene expression occurred in the qualitative level. Further analysis indicated that higher percentage of total differentially expressed cDNA was observed in highly heterotic hybrid than in non-heterotic hybrid.

对四个不同优势的玉米杂交和自交在种子发育前期基因表达研究表明，玉米杂交种子与自交种子在发育前期存在明显的基因表达差异，强优势的杂交组合与弱优势杂交组合之间表现差异的总cDNA比例存在极显著差异，进一步分析发现，杂交特异表达与杂种优势存在一定的正向关系。

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。