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[求助]
測植物葉片硝酸還原酶活性的問題
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各位大俠,我現(xiàn)在正在測植物葉片硝酸還原酶活性,所用的方法是活體法,NR activity was assayed in vivo by measuring NO-2 production in tissue that has been vacuum infiltrated with buffered NO-3 solutions.[31]The leaves and roots from the nonstressed and stressed seedlings were collected in the morning between 8:30 and 11:00 solar time. Circles 5mm in diameter were cut from the leaves of O. europaea. Leaves and roots of R. sphaerocarpa and roots of O. europaea were cut into 5mm sections. Approximately 300 mg of leaf punches and 300 mg of roots from each plant were placed into tubes containing 2mL of an incubation medium consisting of 0.05M tris-HCl pH 7.8 and 0.25M KNO3. The tubes were sealed and kept in the dark at 30C during 1 h. The nitrite released into the medium was determined after incubation by treating 1mL of the aliquots with 1mL of 1% sulphanilamide in 1M HCl and 1mL of 0.01% N-1-napthyl-ethylenediamine hydrochloride (NNEDA). After 15 min, the optical density was measured at 540nm with Beckman spectrophotometer. 上面的這些是我在一篇SCI 文獻(xiàn)里看到的,老師要求按這方法做,但是其中的試劑配制方法,參比溶液的設(shè)置,還有標(biāo)準(zhǔn)曲線的繪制,我都沒有,而且我查了很多文獻(xiàn)都沒有具體的操作步驟。希望各位高人能夠幫小弟一把!給我一些上面方法的具體操作步驟,不勝感激。[ Last edited by amisking on 2011-6-15 at 19:38 ] |
找到一些相關(guān)的精華帖子,希望有用哦~
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