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1.
在大田条件下研究了3种植物营养素拌种对旱地高产小麦花后根系衰老及产量的影响,认为植物营养素拌种后根系活力、根系SOD、CAT活性及可溶性蛋白质含量增加,MDA含量减少,可延缓根系衰老,虽产量增加,但拌种处理与对照(不拌种)差异较少,因而在旱地高产麦田可以实施植物营养素拌种,但只能作为辅助措施。  相似文献   

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一种简便,快速的真菌油脂提取方法   总被引:9,自引:0,他引:9  
张玲  李植峰 《生物技术》1999,9(6):43-44
利用微生物发酵生产不饱和脂肪酸(PUFAs)即将大规模工业化生产,诱变筛选富含PUFAs的高产菌株成为工业育种的热门课题,快速判断真菌中油脂含量对菌株的筛选有着重要意义。对真菌进行油脂含量鉴定的方法有两种:一种是半定量方法———脂肪染色法,该法判断结果较困...  相似文献   

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曲霉N1—14‘胞质酶活性与产L—苹果酸能力的关系   总被引:3,自引:0,他引:3  
L-苹果酸(LMA)高产突变株曲霉N1-14’在高产酸状态下,其胞质中催化CO2固定反应的酶有四种:丙酮酸羧化酶(PC)、磷酸烯醇丙酮羧化酶(PEPC)、磷酸烯醇丙酮酸羧化激酶(PCK)和苹果酸酶(ME);除ME之外,三种羧化酶的活性与LMA产生速率呈较好的线性正相关关系;苹果酸脱氢酶(MDH)活性比PC等酶高2 ̄3个数量级;琥珀酸脱氢酶(SDH)活力则明显低,几种酶只有SDH与发酵醪中LMA含量  相似文献   

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土层厚度对旱地小麦花后根系衰老的影响   总被引:1,自引:0,他引:1  
石岩  于振文 《西北植物学报》2000,20(6):1046-1050
随土层加深,根系活力、根系SOD、CAT活性及可溶性蛋白质含量增加,MDA含量减少,土层愈薄,其根系衰老愈快。从整个土层看,处理3(160cm)与对照(200cm)无显著差异,处理1(80cm)和处理2(120cm)与对照差异显著,由此可以认为延迟旱地小麦衰老的土层厚度应在160cm左右,并可据此制定管理方案,以获得高产高效。  相似文献   

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黄玉清   《广西植物》1996,16(1):81-87
本文研究隆安县不同地层的土壤元素含量对荔枝生产的影响。通过分析地层的岩石、土壤、荔枝叶矿物元素含量及其与产量的相关性,确定隆安县荔枝适生地层。提出可能促进隆安县荔枝高产的有SiO2和Mg元素;隆安荔枝生产中,土壤的Zn、B及N、P、K均感不足;引起荔枝中毒造成地层劣势可能是因为Al、Cu、As和Mn含量过高;荔枝含硫量很低,可能为低硫植物。在上述基础上,进行隆安县荔枝生产布局和管理建议。  相似文献   

6.
不同贮藏温度下马铃薯的萌芽和内源激素含量变化   总被引:4,自引:0,他引:4  
马铃薯品种晋薯2号休眠期间,ABA含量下降,ZR,GA3,GA3/ABA增加,高温下种薯的ABA含量下降时间,GA3和ZR含量以及GA3/ABA比值增加时间均提前,休眠期缩短,低温下种薯的ABA含量下降,GA3含量和GA3/ABA比值增加均缓慢,ZR含量有升有降,休眠期延长。  相似文献   

7.
马铃薯品种晋薯2号休眠期间,ABA含量下降,ZR、GA_3、CA_3/ABA增加。高温(25~28℃)下种薯的ABA含量下降时间、GA_3和ZR含量以及GA_3/ABA比值增加时间均提前,休眠期缩短。低温(7~9℃)下种薯的ABA含量下降,GA_3含量和GA_3/MBA比值增加均缓慢,ZR含量有升有降,休眠期延长。  相似文献   

8.
对从中国红豆杉的茎来源的愈伤组织经筛选而得的sinenxans高产细胞系Ts19的过氧化物酶(POD)、酯酶(EST)、细胞色素氧化酶(COD)、淀粉酶(AML)、多酚氧化酶(PPO)及超氧化物歧化酶(SOD)的同工酶,可溶性蛋白的含量及电泳谱带、超氧化物歧化酶、多酚氧化酶和苯丙氨酸解氨酶(PAL)的活性作了比较研究。并与培养过程中sinenxans含量的动态变化相比较,探索了这几种同工酶的酶谱和  相似文献   

9.
网箱养鲤高产技术研究初报   总被引:2,自引:0,他引:2  
网箱养鲤高产技术研究初报郭大民,卢自银,于仕彬,季荣岭(北京市水产总公司,101512)关键词网箱养鲤,高产技术PRELIMINARYREPORTONHIGH-YIELDTECHNIQUESOFCARPCAGECULTURE¥GuoDamin;LuZ...  相似文献   

10.
本实验以枯草杆菌AX—46为出发菌株,在原生质体形成及再生的最佳条件下制备原生质体,并对原生质体进行紫外诱变处理,对大量的再生突变株进行发酵筛选,获得高产菌株AP—12,碱性蛋白酶产量由原来的3200.8u/ml提高到4353.1u/ml,提高率达36%。同时又对AP—12菌株进行遗传稳定性考查,考查结果,AP—12是高产稳定菌株。  相似文献   

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In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980.  相似文献   

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A sensitive method for the detection of small quantities of hydrophobic antioxidant free radical scavengers such as butylatedhydroxytoluene (BHT) and butylatedhydroxyanisole (BHA) in aqueous samples is described. The procedure involves extraction of the hydrophobic free radical scavenger into an organic solvent phase, followed by the subsequent reaction of an aliquot of this extract with the stable cation radical tris(p-bromophenyl)amminium hexachloroantimonate (TBACA). In experiments with BHT and BHA, the loss of TBACA absorbance at 730 nm was found to be linearly proportional to the amount of antioxidant added, with quantities of BHT as small as 200 pmol being easily detectable. In aqueous suspensions of dimyristoylphosphatidylcholine vesicles, assays of the aqueous BHT concentration showed that BHT partitioned strongly into the membrane phase, achieving very high BHT/phospholipid ratios. For a given concentration of BHT, partitioning into the membrane phase was greater in large, multilamellar liposomes than in either small, single-walled vesicles or in purified rat brain synaptic vesicle membranes. Direct assay of BHT and BHA in phospholipid membranes, however, was complicated by a nonspecific interaction between TBACA and the phospholipid.  相似文献   

19.
Birefringence of flow of preparations of myosin   总被引:4,自引:0,他引:4  
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