子叶的

Unlike other dicot plants, Old World species evolve anisocotylous trait during germination while New World species remain isocotyly instead.

其中，旧世界苦苣苔科类群发展出极为特殊的子叶不等大现象，而新世界苦苣苔科类群则保持子叶等大的特性。

The weeds in wheat field in the basin, river valley and plain area are generally taken as the main damage for agricultural crops. There is little difference of damage extent between dicotyledon and monocotyledon in mountain area and relatively low oasis plain.

盆地、河谷区域和平原区麦田杂草总体上以双子叶杂草为主；高海拔山地麦区以单子叶杂草为主；山地与海拔相对低的绿洲平原之间的过渡麦区，单、双子叶杂草危害程度基本相同。

Variation of tetraploidy was observed among the regenerants from culture of immature cotyledons,cotyledons and leaves of melon seedlings.

甜瓜未成熟子叶、幼苗子叶和真叶离体培养的再生植株中存在着明显的四倍体变异，比率分别为30%、16.2%和 42.9%。

The seeds of Impatiens balsamina L. were carried by spacecraft Shenzhou 4 on December 30, 2004 which flew for 6 days and 19 hours.

神舟4号搭载的凤仙花种子经种植后获得SP3种子，发现SP3代子叶发生变异现象，在苗期的子叶数目和形态呈多种变化。

After 7 d, the uniform-sized seedlings were selected, their cotyledons removed and cuttings made 3.5 cm below the cotyledonary node, keeping the above epicotylar portion intact.

经过7个D ，统一大小的幼苗被选定的，取消其子叶和剪报作出三点五厘米低于子叶节，保持上述epicotylar部分完好无损。

Effect of 6-BA on regeneration of cotyledonary node including germination of seedlings, multiple shoots induction and shoots elongation from soybean cultivars "heinong 35" were studied.

以大豆品种黑农35的子叶节为材料，研究6-BA对子叶节再生三个阶段即无菌苗萌发、丛生芽诱导、丛生芽伸长的影响。

They form the first photosynthetic organ in seeds showing epigeal germination, e.g. sunflower but in others they remain underground.

有些种子的子叶在种子萌发后露出土面，进行短期的光合作用，如向日葵，但在另一些植物中子叶仍然在地下。

The influences of temperature were significant to the peroxydase activity in cotyledons and radicles and that of salinity was extremely significant to the peroxydase activity in cotyledons and radicles.

温度对子叶和胚根中的过氧化物酶活性有显著影响，盐度对子叶和胚根中过氧化物酶活性有极显著影响。

The results indicated that MDA of both the radicles and cotyledons increased extremely significantly under the low and the high temperature treatments compared with the control, whereas the SOD activities decreased.

结果表明：温度胁迫使胚根中TSP含量均较常温显著或极显著降低，子叶中的TSP含量在低温处理下极显著高于对照，而在高温下与之相反；温度胁迫下，各豇豆品种胚根和子叶中MDA含量均较显著或极显著高于对照；SOD活性变化与之相反，但品种间有差异。

Somatic embryos can be produced both from the surface and the inner of the calli. Embryogenic cell has normal shape, dense cytoplasm , clear nucleolus, hearty metabolize; Plantlet regenerations were developed from global embryo, heart-shaped embryo, torpedo-shaped embryo and cotyledon embryo, in which the V-shaped vessel vascular bundles and shoot tip meristem and root tip meristem were observed.

胚性细胞多为椭圆形，细胞质浓厚，核仁明显，代谢旺盛；体细胞胚经过球形胚、心形胚、鱼雷形胚和子叶胚而发育成再生植株，子叶期体细胞胚可观察到明显的V型维管束、茎尖分生组织以及根尖分生组织。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。