查询词典 cotyledon

Three kinds of explants from Cajanus cajan were used to established callus culture. Ethanolic extract prepared from five plant materials, callus from cotyledon, callus from hypocotyl, callus from root, Cajanus cajan seeds and Glycine max seeds were examined for their phenolic contents, flavonoids contents and DPPH radical - scavenging activity.

摘要 本研究建立培养树豆三种部位愈合组织，以总酚含量、总黄酮含量及DPPH自由基清除能力三种方式分析其抗氧化能力，并与成熟的树豆及黄豆种子比较；再利用genistein和daidzein两种标准品，检测这五种检品中大豆异黄酮的含量。

Seeds subglobose, with a thin sarcotesta and a stony seed coat, without caruncle; endosperm fleshy; cotyledon broad and flattened.

种子近球形，具薄的肉质种皮和石质的种皮，没有种阜；胚乳肉质。子叶宽和扁平。

Seeds oblong-elliptic, maculate-striate; caruncle absent; cotyledon broad and flattened.

种子长圆形椭圆形，具斑点；种阜无；子叶宽和扁平。

The caulicle and the root of Rh Sachalinensis The induction of callus from the cotyledon is easiest.

利用高山红景天无菌苗的子叶、幼叶、幼茎和根成功诱导出了7种愈伤组织。

Results as bellows: AtSIRT1 was located in Mitochondrial as hSIRT4 of human, and maybe take part in respiration and electron transformation chain, AtSIRT2 was located in nucleolus as hSIRT6 of human, maybe play important role in extend lifespan;mutation in AtSIRT1 leaded to cotyledon of plant turn to yellow and caused short life span. Mutation in AtSIRT2 could make the color of leaf turn to purple and accumulate a lot of anthocyanin;Sirtinol, a inhibitor of SIRT which did not cause the same model of the mutation of AtSIRT1 and AtSIRT2 indicated that the mechanism of Sirtinol was different from other organism;the structure of AtSIRT1 and AtSIRT2 were similar to other known Sir2, which indicated that they maybe have the same function;AtSIRT2 was overexpressed and its activity was detected.

结果表明，1，拟南芥AtSIRT1与人的同源蛋白hSIRT4相同，定位于线粒体，可能参与呼吸作用和电子传递，SIRT2与人的同源蛋白hSIRT6相同，定位于细胞核，可能同它的功能类似，在延缓衰老及调节细胞寿命方面起作用。2，AtSIRT1突变，可引起幼苗和植株的子叶变黄和早衰；AtSIRT2突变，可引起叶片发紫，沉积大量花青素。3，SIRT蛋白的抑制剂Sirtinol不能表型模写AtSIRT1和AtSIRT2突变体，说明Sirtinol在拟南芥中的作用机制不同于其他生物。4，AtSIRT1和AtSIRT2蛋白质结构预测表明与已知的Sir2蛋白相似，揭示其功能的相似性。5，在大肠杆菌中过量表达了其中一个基因(AtSIRT2)，可体外检测其酶学活性，进一步证明其功能。

0Mg/L 6-benzylaminopurine was the optimal concentration of shoots quantity inducing which frequency of inducing shoots and number of shoots per explant were 100% and 11.1 respectively. 0.5mg/L 6-benzylaminopurine was the optimal concentration of shoots length inducing which average length of shoots was 12.0mm. Explant size had significantly effects on direct shoots quantity and length induction. When complete cotyledon used as explant, frequency of inducing shoots, number of shoots per explant and average length of shoots could approach to 100%, 6.7 and 17.1mm respectively. 2.0mg/L silver nitrate could significantly increase shoot quantity induction, both frequency of inducing shoots and number of shoots per explant could be as high as 97.2% and 4.2 respectively. But silver nitrate also could restrain shoots elongation.

结果表明：不同黄瓜品种直接不定芽数量诱导存在显著差异，但长度诱导无显著差异；6-苄氨基嘌呤对直接不定芽数量和长度的诱导作用显著，其中4.0mg/L为数量诱导适宜浓度，其出芽率和每外植体出芽数达到最高，分别为100.0%和11.1，0.5mg/L为长度诱导适宜浓度，其平均芽长12.0mm；外植体的大小对直接不定芽数量和长度均具显著影响，随着子叶的增大诱导直接不定芽的数量和长度增加，其中单片完整子叶为最适宜大小，其出芽率、每外植体出芽数和平均芽长分别达到100%、6.7和17.1mm；硝酸银也对直接不定芽数量诱导影响显著，其中2.0mg/L为适宜浓度，出芽率和每外植体出芽数分别达到97.2%和4.2，但对芽长有抑制作用。

Of or relating to seed germination in which the cotyledon s remain below the surface of the ground.

地下生的，地下产生子叶的种子萌芽的，或与之有关的，在这种萌芽里胚胎保留在地表面以下

In contrast, the activity of NADH-GDH was low at first stages of cotyledon development, and then gradually increased.

但是NADH-GDH呈现出相反的变化，在子叶发育的前期阶段其活性低，而后逐步升高。

Induced frenquency of hypocotyls of Callus was higher than that of cotyledon.

由此可见，不同激素浓度配比的培养基再生体系的建立影响不同。

The early events in cotyledon cells cultured in vitro of Acacia mangium were studied under light and electron microscope.

用光学和电子显微镜观察马占相思子叶在离体培养中的细胞早期变化。

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。