子叶的

The apparent selective establishment criteria of the new strips may explain the low similarity in species composition between the original boundary and the new boundary plots: only non-woodland perennial monocots and dicots had high establishment rates in the herbaceous strips in all boundary types.

表观选择性建立标准的新带可以解释低，在相似的物种组成与原选区分界及新的边界情节：只有非林地多年生monocots和双子叶植物有较高的建立利率，在绿草带的所有边界类型。

Northern-blot analysis demonstrated that the two rice NAP1-like genes are predominantly expressed in stem tissues such as root and shoot apical meristems as well as in young flowers.

我们通过筛选单子叶植物水稻和双子叶植物烟草的cDNA文库，获得了6个NAP1类似蛋白（NAP1 like protein，NAP1_LP）的cDNA，其中水稻的两个NAP1类似蛋白分别命名为OsNAP1_L1和OsNAP1_L2，烟草的4个类似蛋白分别命名为NtNAP1_L1、NtNAP1_L2、NtNAP1_L3和NtNAP1_L4。

In addition, we compared the codon preferences among poplar, Arabidopsis thaliana, Oryza sative, Homo sapi- ens and Escherichia coli, and poplar was found to be most similar to A.thaliana and least similar to E.coli.

将杨树的密码子使用频率与拟南芥、水稻、大肠杆菌和人等不同模式生物种比较后发现，杨树密码子的偏爱性与同为双子叶植物的拟南芥最为相似，与人和大肠杆菌之间的差异较大。

Using cotyledon as explants to induce and differentiate callus, and a lots of resistent callus with green prominence were created, the completely differentiated transgenic alfalfa was not yet obtained.

利用农杆菌介导的叶盘法，选取子叶为外植体，现已获得大量的抗性愈伤组织，并且在愈伤组织上有绿色的突起，尚未得到分化完全的再生植株。

In this paper,plumules,cotyledons,hypocotyls,leaf blades,petioles and stalks of physic nut (Jatropha curcas L.) were used as explants,and callus induction and plant regeneration were studied on MS medium contained different concentrations of 6-BA and NAA.

以小桐子的胚芽、子叶、下胚轴、叶柄、叶片和茎段作为外植体，用不同浓度的6-苄基腺嘌呤(6-BA)和α-萘乙酸对其进行愈伤组织的诱导和植株再生的研究。

The seedling height and the leaf area increased after treatments.3 Rape seeds were cultured in the solution containing diosgenin of different concentrations. The different concentrations of diosgenin affected metabolism of rape seedlings, particularly at a concentration of 0.5mg/L. The treatments of 0.5mg/L diosgenin increased prominently the contents of soluble sugar, soluble protein and the activity of peroxidase, catalase, Ca2+- ATPase in rape cotyledons.4 Rape seedlings were sprayed with 0.5mg/L diosgenin solution at the two-leaf and one-bud stage.

油菜种子经不同浓度的薯蓣皂素浸种处理后，0.5 mg／L的薯蓣皂素明显影响油菜幼苗生理代谢，子叶中可溶性蛋白质和可溶性总糖含量提高，过氧化物酶和过氧化氢酶的活性，Ca~(2+)-ATP酶的活性上升。

When cultured on the medium with different auxin , root segments could elongate and branch, and the addition of 1mg/l IBA into the medium was the most suitable for long-term root culture. Calli could be induced from root explants in the presence of 2, 4-D and when transferred onto E medium, they transformed further into embryonic calli which could develop into normal plants through the stages of globular-embryo, heart-shaped embryo, torpedo-shaped embryo, cotyledonary embryo.

培养基中添加生长激素（IAA，IBA，NAA）能够诱导无菌苗根切段的生长和分枝形成；而1mg／l IBA的存在，最适合于根的长期离体培养。2，4-D的存在能够诱导根外植体脱分化形成愈伤组织，愈伤组织转移至E型分化培养基能够转变成胚性愈伤组织，并进一步经球形胚、心形胚、鱼雷形胚、子叶形胚发育成正常植株。

Starch sheath The innermost layer of cells of the cortex replacing the endodermis in some stems, especially young herbaceous dicotyledonous stems. Its cells contain prominent starch grains.

淀粉鞘：在部分植物的茎的皮层中，尤其是双子叶草本植物茎，代替内皮层结构的最里一层细胞，其内含有明显的淀粉颗粒。

In comprehensive concerning of all above,it is suggested that theincrease of zinc content in shoot apex may involved in IAA synthesis in thispart,which is more likely to be an orignal signal that plays a critical role inthe regulation of root ferric reductase activity of iron-deficientdicotyledonous plants.

综上所述，缺铁胁迫条件下，根系铁含量的降低导致根系锌含量的积累，从而使茎尖的锌含量增加并有可能促进地上部IAA的增加。在双子叶植物中，IAA可能是调节缺铁根系〓还原酶活性的初始信号物质。

With this procedure,significant differences in resistance/susceptibilityamong cultivars could be manifested reproducibly.

进一步通过对可溶性蛋白含量和SOD活性的测定证明，在接种枯萎病菌后无论是抗病品种(86-1，未显症)还是感病品种(泗棉2号，已显症)棉株根部的可溶性蛋白含量均显著增加(其它部位--茎、子叶和真叶中均不显著)，但SOD酶活性的增加仅见于已显症的感病品种泗棉2号的根中。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。