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superzbobo木蟲 (初入文壇)
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[求助]
衣藻 TAP培養(yǎng)基 已有3人參與
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近來剛開始做藻類方面的實驗。 用TAP培養(yǎng)基在培養(yǎng)衣藻，發(fā)現(xiàn)個很奇怪的問題，想向各位請教。 就是TAP培養(yǎng)基的問題，TAP培養(yǎng)基如果不滅菌，放在室溫條件下，沒一兩天就渾濁了，有些小絮狀沉淀的東西，鏡檢感覺不像染菌。 而滅菌的TAP培養(yǎng)基放室溫條件下就不會，不知道可能是什么原因 因為另一個菌種用另一個培養(yǎng)基的話，即使不滅菌，在室溫條件放著也不會渾濁呀 所以覺得TAP培養(yǎng)基有點奇怪 非常感謝 附TAP培養(yǎng)基配方 TAP medium from Gorman, D.S., and R.P. Levine (1965) Proc. Natl. Acad. Sci. USA 54, 1665-1669. This is probably the most widely-used medium at present for experimental work. Make the following stock solutions: 1. TAP salts NH4Cl 15.0 g MgSO4 . 7H2O 4.0 g CaCl2 . 2H2O 2.0 g water to 1 liter 2. phosphate solution K2HPO4 28.8 g KH2PO4 14.4 g water to 100 ml 3. Hutner's trace elements To make the final medium, mix the following: 2.42 g Tris 25 ml solution #1 (salts) 0.375 ml solution #2 (phosphate) 1.0 ml solution #3 (trace elements) 1.0 ml glacial acetic acid water to 1 liter For solid medium, add 15 g agar per liter Autoclave. For Tris-minimal medium omit the acetic acid and titrate the final solution to pH 7.0 with HCl Hutner's trace elements Hutner et al. (1950) Proc. Am. Philos. Soc. 94, 152-170 This mixture is used both in TAP and in the Sueoka high salt medium. For a detailed analysis of how well this trace elements solution meets the nutritional requirements of C. reinhardtii, see Merchant et al. (2006) Biochim. Biophys. Acta 1763, 578-594. For 1 liter final mix, dissolve each compound in the volume of water indicated. The EDTA should be dissolved in boiling water, and the FeSO4 should be prepared last to avoid oxidation. compound amount water EDTA disodium salt 50 g 250 ml ZnSO4 . 7 H2O 22 g 100 ml H3BO3 11.4 g 200 ml MnCl2 . 4 H2O 5.06 g 50 ml CoCl2. 6 H2O 1.61 g 50 ml CuSO4 . 5 H2O 1.57 g 50 ml (NH4)6Mo7O24. 4 H2O 1.10 g 50 ml FeSO4. 7 H2O 4.99 g 50 ml Mix all solutions except EDTA. Bring to boil, then add EDTA solution. The mixture should turn green. When everything is dissolved, cool to 70 degrees C. Keeping temperature at 70, add 85 ml hot 20% KOH solution (20 grams / 100 ml final volume). Do NOT use NaOH to adjust the pH. Bring the final solution to 1 liter total volume. It should be clear green initially. Stopper the flask with a cotton plug and let it stand for 1-2 weeks, shaking it once a day. The solution should eventually turn purple and leave a rust-brown precipitate, which can be removed by filtering through two layers of Whatman#1 filter paper, repeating the filtration if necessary until the solution is clear. Store refrigerated or frozen convenient aliquots. Some people shorten the time for formation of the precipiate by bubbling the solution with filtered air. If no precipitate forms, the solution is still usable. However, you might want to check the pH in this case and adjust it to around 7.0 using either KOH or HCl as needed. |
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superzbobo(金幣+2): 謝謝參與
superzbobo(金幣+2): 謝謝參與
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祝福 [ 發(fā)自小木蟲客戶端 ] |
4樓2014-08-10 19:35:02
superzbobo
木蟲 (初入文壇)
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6樓2014-08-11 01:51:27
7樓2014-08-11 08:10:51
superzbobo
木蟲 (初入文壇)
- 應助: 0 (幼兒園)
- 金幣: 3968.5
- 散金: 57
- 紅花: 1
- 帖子: 46
- 在線: 356.4小時
- 蟲號: 295190
- 注冊: 2006-11-11
- 性別: GG
- 專業(yè): 生物化工與食品化工
9樓2014-08-11 15:33:07
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