| 產(chǎn)品編號(hào) | bs-4606PB |
| 英文名稱 | Gibberellins/BSA |
| 中文名稱 | 赤霉素牛血清白蛋白偶聯(lián)物 |
| 別 名 | free gibberellin; conjugated gibberellin. |
| 理論分子量 | N/AkDa |
| 性 狀 | Liquid |
| 物 種 | N/A |
| 序 列 | Coupling protein |
| 內(nèi)毒素 | Not analyzed |
| 活性 | No |
| 標(biāo)簽 | N/A |
| 緩 沖 液 | 0.01M TBS(pH7.4) |
| 保存條件 | Stored at -70℃ or -20℃. Avoid repeated freeze/thaw cycles. |
| 注意事項(xiàng) | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. |
| 產(chǎn)品介紹 | There are two classes of gibberellins: the 19-carbon gibberellins and the 20-carbon gibberellins. The 19-carbon gibberellins,formed from 20-carbon gibberellins,are the bio-logically active forms. Gibberellins also vary according to the position and number of hydroxyl groups linked to the carbon atoms of the ent-gibberellane skeleton. Hydroxylation has a profound influence on biological activity. Probably the best-defined role for gibberellins in regulating the developmental processes in higher plants is stem growth. The cellular basis for gibberellin-induced stem growth can be either an increase in the length of pith cells in the stem or primarily the production of a greater number of cells. Applied gibberellins can often promote germination of dormant seeds,a capability suggesting that gibberellins are involved in the process of breaking dormancy. Gibberellins are intimately involved in other aspects of seed germination as well. Applied gibberellins promote or induce flowering in plants that require either cold or long days for flower induction. Gibberellin is probably not the flowering hormone or floral stimulus,because the floral stimulus appears to be identical or similar in all response types. The application of gibberellins often modifies sex expression,usually causing an increase in the number of male flowers. See also Dormancy; Flower; Plant growth; Seed. Although gibberellins have limited use in agriculture compared with other agricultural chemicals such as herbicides,several important applications have been developed,including the production of seedless grapes. Application of gibberellin at bloom results in increased berry size and reduced berry rotting. Gibberellins are also used to increase barley malt yields for brewing and to reduce the time necessary for the malting process to reach completion. Gibberellins have found significant applications in plant breeding. Other uses for gibberellin in agriculture include reduction of rind discoloration in citrus fruits,increased yield in sugarcane,stimulation of fruit set in fruit trees,and increased petiole growth in celery. See also Plant hormones 赤霉素最突出的生理效應(yīng)是促進(jìn)莖的伸長(zhǎng)和誘導(dǎo)長(zhǎng)日植物在短日條件下抽薹開花。各種植物對(duì)赤霉素的敏感程度不同。遺傳上矮生的植物如矮生的玉米和豌豆對(duì)赤霉素最敏感，經(jīng)赤霉素處理后株型與非矮生的相似；非矮生植物則只有輕微的反應(yīng)。有些植物遺傳上矮生性的原因就是缺乏內(nèi)源赤霉素（另一些則不然）。赤霉素在種子發(fā)芽中起調(diào)節(jié)作用。許多禾谷類植物例如大麥的種子中的淀粉，在發(fā)芽時(shí)迅速水解；如果把胚去掉，淀粉就不水解。用赤霉素處理無胚的種子，淀粉就又能水解，證明了赤霉素可以代替胚引起淀粉水解。赤霉素能代替紅光促進(jìn)光敏感植物萵苣種子的發(fā)芽和代替胡蘿卜開花所需要的春化作用。赤霉素還能引起某些植物單性果實(shí)的形成。對(duì)某些植物，特別是無籽葡萄品種，在開花時(shí)用赤霉素處理，可促進(jìn)無籽果實(shí)的發(fā)育。但對(duì)某些生理現(xiàn)象有時(shí)有抑制作用。 |
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