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1.
利用间歇浸没式生物反应器进行甘蔗脱毒苗快繁研究 总被引：3，自引：0，他引：3
利用新型间歇浸没式生物反应系统(TIBs)在培养基配方、接种数量、蔗糖浓度及品种差异等方面对甘蔗脱毒组培苗快繁进行研究.结果表明:①PP333及6-BA+PP333均能促进组培苗分化,增殖率较高且生长整齐,可进入下一阶段培养;②GA3浓度为1.0 mg·L-1伸长培养效果最好,平均苗高9.87 cm;③每升培养液接种量为20株时的增殖率最高;④培养基蔗糖浓度以20 g·L-1较为适宜.利用该系统对ROC16和ROC22两个甘蔗品种的脱毒苗经过3个阶段的培养,ROC16增殖率达40倍,每瓶得苗800株苗左右;ROC22增殖率为30倍,每瓶苗的数量达600株. 相似文献
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3.
《农业科学与技术》2016,(3)
A total of 15 pools were selected from a greenhouse, and they were randomly and evenly divided into three groups. In each group, one stocking density of Eriocheir sinensis was arranged. The results showed that after 45-d culture, the crab number per kilogram reached about 300 with survival rate of about 20%; the initial stocking density had significantly effect on the body size of E. sinensis on sel , instead on the survival rate of E. sinensis larvae. Therefore, it is feasible to conduct the culture of E. sinensis larvae in a pool in greenhouse. 相似文献
4.
[目的]优化基于间歇浸没式生物反应器系统(TIBs)的荔浦芋组培快繁体系,为荔浦芋脱毒组培苗的工厂化、自动化生产提供技术支持.[方法]以荔浦芋新品种桂芋2号茎尖分生组织脱毒诱导获得的不定芽为外植体,利用TIBs培养系统筛选出适合组培苗增殖及生根的最佳激素组合,并分析不同继代材料、接种密度及浸没间歇频率对组培苗增殖和生根效果的影响.[结果]利用TIBs培养系统可有效提高荔浦芋组培苗的增殖效果,增殖倍数达28.96倍,约是传统固体培养方法(2.87倍)的10倍,且组培苗的株高和生根数均极显著高于传统固体培养植株(P<0.01).在TIBs培养系统中,含4.00 mg/L 6-苄氨基嘌呤(6-BA)+0.05 mg/L萘乙酸(NAA)的培养基最适合荔浦芋组培苗增殖和生长,其组培苗增殖倍数为32.04倍.当接种材料为第4代荔浦芋继代材料、接种密度为10株/L、浸没间歇频率为5 min/6 h时,最有利于组培苗增殖和生长,增殖倍数均在30.00倍以上,可缩短萌芽时间,组培苗长势良好,且培养基污染率为0.[结论]利用TIBs培养系统对荔浦芋继代材料进行高效快繁具有可行性,可为实现及推动荔浦芋健康种苗繁育的工厂化生产提供技术支持. 相似文献
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SHU Ai-ping Kim Jong hwan ZHANG San-yuan CAO Gui-lan NAN Zhong-hao Lee Kyu seong LU Qin HAN Long-zhi 《中国农业科学(英文版)》2009,8(5):513-520
The genetic similarity and genetic difference among improved japonica rice varieties from different countries （or regions and organizations） were detected. The aim is to provide genetic basis to the breeding of japonica rice varieties. The genetic similarity and cluster of 313 improved japonica varieties from 20 countries （or regions and organizations） were analyzed using the SSR marker. With 34 SSR primers which were polymorphic and uniformly distributed in rice genome, totally 198 alleles were detected among these improved varieties with the average number of alleles per pair of primers of 5.8235. RM320, RM531, RM1, RM21, and RM336 located more alleles, which were 16, 13, 12, 10, and 10 respectively. RM320, RM336, RM286, RM531, and RM21 showed higher genetic diversity indexes, which were 2.3668, 2.0041, 1.9684, 1.9508, and 1.7203, respectively. The genetic similarity for improved japonica varieties among different countries （or regions and organizations） were ranged from 0.279 to 0.918, and the mean value was 0.653. The rice varieties from countries whose latitude and geography position were all nearer were clustered together with higher genetic similarity indexes. The rice varieties from countries who had more different latitude and far geography position were clustered separately with lower genetic similarity indexes. The results indicated the genetic similarity indexes among improved japonica varieties had a close relationship with the geographical position, especially with the latitude. 相似文献
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Effects of different LEDs light spectrum on the growth,leaf anatomy,and chloroplast ultrastructure of potato plantlets in vitro and minituber production after transplanting in the greenhouse 
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下载免费PDF全文 CHEN Li-li ZHANG Kai GONG Xiao-chen WANG Hao-ying GAO You-hui WANG Xi-quan ZENG Zhao-hai HU Yue-gao 《农业科学学报》2020,19(1):108-119
Light spectrum plays an important role in regulating the growth and development of in vitro cultured potato(Solanum tuberosum L.) plantlets. The status of potato plantlets at the end of in vitro stage influences the minituber production after transplanting. With 100 μmol m~(-2)s~(-1) total photosynthetic photon flux density(PPFD), a light spectrum study of 100% red light emitting diodes(LEDs) light spectrum(RR), 100% blue LEDs light spectrum(BB), 65% red+35% blue LEDs light spectrum(RB), and 45% red+35% blue+20% green LEDs light spectrum(RBG) providing illumination at the in vitro cultured stage of potato plantlets for 4 weeks using fluorescent lamp as control(CK) was performed to investigate the effects of LEDs light spectrum on the growth, leaf anatomy, and chloroplast ultrastructure of potato plantlets in vitro as well as the minituber yield after 2 months transplanting in the greenhouse. Compared to CK, RB and RBG promoted the growth of potato plantlets in vitro with increased stem diameter, plantlet fresh weight, plantlet dry weight, and health index. Furthermore, BB induced the greatest stem diameter as well as the highest health index in potato plantlets in vitro. Root activity, soluble protein, and free amino acid were also significantly enhanced by BB, whereas carbohydrates were improved by RR. In addition, thickness of leaf, palisade parenchyma and spongy parenchyma was significantly increased by BB and RBG. Chloroplasts under BB and RBG showed well-developed grana thylakoid and stroma thylakoid. Unexpectedly, distinct upper epidermis with greatest thickness was induced and palisade parenchyma and spongy parenchyma were arranged neatly in RR. After transplanting in the greenhouse for 2 months, potato plantlets in vitro from BB, RB, and RBG produced high percentage of large size tuber. BB improved fresh and dry weights of the biggest tuber but decreased tuber number per plantlet. In addition, RBG increased tuber number as well as tuber fresh and dry weight slightly. Our results suggested monochromatic blue LEDs as well as combined red, blue or/and green LEDs light spectrum were superior to fluorescent lamp spectrum in micro-propagation of potato plantlets. Therefore, the application of RBG was suitable; BB and RB could be used as alternatives. 相似文献
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Development and identification of glyphosate-tolerant transgenic soybean via direct selection with glyphosate 下载免费PDF全文
下载免费PDF全文 GUO Bing-fu HONG Hui-long HAN Jia-nan ZHANG Li-juan LIU Zhang-xiong GUO Yong QIU Li-juan 《农业科学学报》2020,19(5):1186-1196
Glyphosate-tolerant soybean is the most widely planted genetically modified crop worldwide. However, soybean remains recalcitrant to routine transformation because of the low infection efficiency of Agrobacterium to soybean and lack of useful selectable markers. In this study, several Agrobacterium strains and cell densities were compared by transient expression of the GUS gene. The results showed that Agrobacterium strain Ag10 at cell densities of OD_(600) of 0.6–0.9 yielded the highest infection efficiency in Agrobacterium-mediated soybean cotyledonary node transformation system. Meanwhile, a simple and rapid method was developed for identification of glyphosate tolerance in putative T_0 transgenic plants, consisting of spotting plantlets with 1 μL Roundup~?. The whole cycle of genetic transformation could be shortened to about 3 mon by highly efficient selection with glyphosate during the transformation process and application of the spot assay in putative T_0 transgenic plantlets. The transformation frequency ranged from 2.9 to 5.6%. This study provides an improved protocol for development and identification of glyphosate-tolerant transgenic soybeans. 相似文献
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Study on Plant Regeneration of Wheat Mature Embryos Under Endosperm-Supported Culture 总被引：5，自引：0，他引：5
CHEN Jun-ying YUE Run-qing XU Hai-xian CHEN Xin-jian 《中国农业科学(英文版)》2006,5(8):572-578
To reveal the suitability of using mature embryos as an explant source in wheat tissue culture, mature embryos from eight common wheat cultivars （Triticum aestivum L. cv.） were cultured with or without endosperm to test their efficiency of callus induction and plant regeneration. When embryos were cultured together with endosperm （endosperm-supported culture, ES）, the percentage of callus induction was significantly lower than that when embryos were cultured in the absence of endosperm （non-endosperm-supported culture, NES）. This pattern was evident in most genotypes, regardless of whether 2 or 8 mg L^-1 2,4-D was added in the NES culture. However, in ES culture, more induced calli were differentiated into distinct green spots and they further developed into plantlets. Thus, more plants were regenerated in ES culture than in the NES treatment. Most of the eight tested genotypes showed a significant difference in callus induction rate and plantlet regeneration in both ES and NES cultures. In addition, the enzymatic activity of oxalate oxidase in the callus of ES culture condition was obviously higher than that in the callus of NES culture condition, suggesting that the activity of oxalate oxidase may be a parameter for selection of calli with potential for plantlet regeneration. These results indicate that wheat mature embryos are valuable explants for highly efficient callus induction and plant regeneration, if proper treatment and medium are used. 相似文献
9.
SHU Ai-ping ZHANG Yuan-yuan CAO Gui-lan LU Qin ZHANG San-yuan HAN Long-zhi 《中国农业科学(英文版)》2010,9(8):1093-1100
To provide a genetic basis for japonica rice breeding, the genetic similarity and cluster of 139 accessions of improved japonica rice varieties from 12 provinces and cities of China were analyzed using 34 SSR markers. Totally 198 alleles were detected among these improved japonica rice varieties with the average number of alleles per pair of primers was 5.3235. RM320, RM531, RM1, RM286, and RM336 showed more alleles, which were 15, 12, 11, 9, and 9, respectively. RM320, RM336, RM286 and RM531 showed higher genetic diversity indexes; which were 2.3324, 2.0292, 1.8996, and 1.7820, respectively. The range of genetic similar index among improved japonica rice varieties from different provinces was from 0.321 to 0.914, with the average of 0.686. There was a high genetic similarity among improved japonica rice varieties from Heilongjiang, Jilin, Liaoning, Ningxia, and Yunnan, which were located in similar latitude or similar ecological environment, while there was a low genetic similarity between improved japonica rice varieties from Guizhou and Jiangsu, and other provinces which were located in more different latitudes and ecological environments. The markers of RM320, RM531, RM1, RM286, and RM336 fit to be used in analysis of genetic diversity for improved japonica rice variety. The genetic similarity among improved japonica rice varieties from different provinces was closely associated with genetic basis of parents, and was also correlated with latitude and ecological environment where the varieties were bred. 相似文献
10.
寒地早粳花培培养基中铁的效应(英文) 总被引：1，自引：0，他引：1
In this study, through vitro culturing anthers of 7 F1 progenies of early Japonica rice in cold region on medium with different Fe2+ contents, it was found that Fe2+ content generated greater impacts on the induction rate and green plantlet differentiation. The result demonstrated that if Fe2+ increased from 32 to 40 mg/kg, the induction rate of early Japonica rice anther culture in N6 culture media was more then 1.4 times higher than that in N6 culture media containing 5.6 mg/kg Fe2+. In this concentration range, the induction rate increased with the increase of Fe2+ content, while if the concentration was over this concentration range, the induction rate decreased with the increase of Fe2+, showing single peak distribution. When the Fe2+ was 40 mg/kg in differentiation medium, the differentiation rate decreased dramatically. The green plantlet differentiations of callus which were induced on culture media containing 32-40 mg/kg Fe2+ were different, when they were cultured on MS culture media, and 85.7% materials could increase green plantlet productivity to about 7.8%. Therefore, increasing Fe2+in induction media properly could increase anther culture efficiency of early Japonica rice in cold region. 相似文献
11.
通过组织培养手段对日本薯蓣进行脱毒及快繁技术研究。结果表明:0.1%HgCl2消毒8 min效果最好,茎段成活率达88%;在MS培养基中,0.5 mg/L 6-BA和1.5 mg/L NAA配合使用时日本薯蓣茎尖的成活率高达100%且生长状况良好;MS+1.5 mg/L6-BA+0.5 mg/LNAA对茎段芽增殖的促进作用明显;MS+2.0mg/L KT+0.02 mg/L NAA可很好地诱导生根和促进生长,再生植株移栽成活率可达85.5%以上。 相似文献
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[目的]研究在自动化、低成本的生物反应器内大量扩繁金线莲。[方法]把金线莲丛状芽培养在不同环境条件下的3 L球形生物反应器中,通过加入花宝(20-20-20)1 g/L+花宝(6.5-4.5-19.0)1 g/L培养基,同时添加蛋白胨2.0 g/L、蔗糖3%和颗粒活性炭0.5 g/L,比较了凝胶培养基与不同条件下生物反应器(浸没式、接触式和潮汐式)培养的金线莲丛生芽的生长情况。[结果]植株生长(干重、茎高、叶数、根数和根长)在接触式生物反应器中相对较好。当外植体数目在60～90个、通气量在0.06 vvm时测试结果(鲜重、茎长、叶数、叶面积和根数)最好,再生苗拥有良好的根系且在温室易驯化成功。[结论]利用生物反应器扩繁金线莲是一种新的有效途径。 相似文献
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【目的】探讨间歇浸没式生物反应器(TIBs)对荸荠(Eleocharis dulcis)组培苗快速繁殖的效果,为提高荸荠组培苗繁殖效率及其工厂化生产提供技术支撑。【方法】以初代诱导培养获得的桂蹄2号荸荠组培苗为外植体,利用TIBs系统进行组培快繁,研究荸荠组培苗不同继代代数、接种密度、激素组合及反应器间歇浸没频率等因子对荸荠组培增殖的影响。【结果】经初代诱导培养的第4、5、6代继代材料增殖倍数较高,其中第6代继代苗增殖倍数最高,达31.1倍,到第7代后随继代代数的增加增殖倍数逐渐降低。当接种密度大于15丛/瓶时,外植体污染率达16.0%;当接种密度低于10丛/瓶时,外植体的污染率为0。低于10 min/6 h的间歇浸没频率有利于降低污染率,在6 h内低于15 min的浸没时间有利于降低玻璃化苗率;当激素组合为3.0 mg/L 6-BA+0.01 mg/L NAA时,组培苗增殖倍数达38.5倍,且组培苗生长正常。【结论】在TIBs系统中,采用经初代诱导培养的第5代荸荠继代组培苗,增殖培养基为MS+3.0 mg/L 6-BA+0.01 mg/L NAA+30.0 g/L蔗糖,pH 6.0,接种密度10丛/瓶,反应器间歇浸没频率为10 min/6 h,可获得较好的培养效果。 相似文献
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铅镉复合污染对水稻生长及产量的影响 总被引：4，自引：0，他引：4
[目的]探讨铅镉复合污染对水稻生长、产量及品质的伤害及机理.采用盆栽试验,研究了不同程度的铅镉复合污染对水稻生长发育及产量品质的影响.[结果]铅镉低浓度胁迫能够促进水稻生长,高浓度抑制水稻的株高;铅镉胁迫显著降低了水稻的分蘖数,随着胁迫浓度增加,分蘖数下降幅度增大;铅镉胁迫显著降低了水稻每盆穗数、结实率、千粒重和产量,低浓度胁迫下每穗总粒数显著增加,高浓度胁迫下每穗总粒数显著降低;铅镉低浓度胁迫下糙米绿和精米率显著增加,高浓度胁迫下糙米率和精米率显著降低,整精米率随处理浓度的增加而显著下降;水稻籽粒中铅镉含量与土壤中铅镉浓度成显著正相关,土壤铅镉含量达到中高浓度时,水稻籽粒铅镉含量严重超标,铅镉最高超标达333%和122%.[结论]该研究为污染地区水稻栽培技术体系的建立提供依据.
Abstract：
[Objective] The aim was to study the damage and the mechanism of combined pollution of Pb and Cd on rice growth,yield and quality of rice.[Method]Effects of combined pollution of Pb and Cd on the growth and yield of rice were studied by pot experiment with cultivating rice. [Result] Pb and Cd could promote dce growth at low concentration while inhibit plant height at high concentration;Pb and Cd stress reduced the number of rice tillers significantly,with the increasing of stress concentration,the decrease amplitude of the number of tillers was greater;the panicle per pot,seed setting rate,1000-grain weight and yield of rice were reduced significantly by Pb and Cd stress,the grain number per panicle decreased significantly under low concentration of Pb and Cd but increased significantly under high concentration;the brown rice rate and milled rice rate increased significantly under low concentration of Pb and Cd while at high concentration of Pb and Cd,the both two reduced significantly,the head milled rice rate reduced significantly with the decreasing of concentration;The Pb and Cd content of grains were significantly positively related to the concentrations of Pb and Cd content in soil,it had excessively exceeded hygienic standard when the concentrations of Pb and Cd in soil were medium-high and the unqualified rate reached 333% and 122%.[Condusion]The study had provided basis for the establishment of rice cultivation system in pollution areas. 相似文献
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三峡库区消落区生态安全预警系统研究 总被引：1，自引：0，他引：1
简要介绍了三峡库区消落区的面积、范围以及可能出现的生态环境问题,初步构建了消落区生态安全预警框架,包含生态安全动态监测、生态安全评价、生态安全警情预报和生念安全决策管理4个子系统.并针对消落区可能出现的生念环境问题初步建立了生态安全综合评价指标体系,包含生态环境污染、土地利用与土地覆被变化、地质灾害和流行病病情、疫情4个预警评价.同时选取29个评价指标,分为基础信息因子数据、联动影响因了数据和致灾诱发因子数据,其中致灾诱发因子数据需要实时搜集乃至实时监控.
Abstract：
The area.the scope as well as some ecological environment questions in Three Gorges Reservoir was briefly introduced.Then its early warning-system frame was preliminarily constructed,which includes ecological security dynamic monitoring,ecological security appraisal,ecological security forecast and ecological security decision-making management.The synthetic evaluation indicator system of the ecological security quality were initially established,which includes ecological environment pollution,land use and land cover change,geological hazard and epidemic outbreaks.At the same time,29 evaluating indicators were selected,divides into the basic factors,response factors and inducing factors,which need to be Real-time monitored. 相似文献
16.
牛体外发育胚胎特定阶段差异表达基因的研究 总被引：1，自引：0，他引：1
[目的]研究不同发育时期牛体外受精胚胎在基因表达模式上的差异.[方法]利用单个胚胎mRNA差异显示技术,对单个8细胞期胚胎与囊胚进行mRNA差异显示,获得1条特异表达条带,对其进行克隆、测序,并与GenBank进行对比.[结果]该序列与牛核糖体蛋白131基因(ribosomal protein 131,RPL3])具有99%的同源性.采用实时定量PCR技术检测8细胞期和囊胚期胚胎RPL31的mRNA表达量,结果表明,RPL31在8细胞期胚胎的相对表达量为囊胚期胚胎的3.2倍.[结论]为揭示和阐明控制牛早期胚胎发育的相关机理提供依据.
Abstract：
The cattle different stage embryos obtained from in vitro was studied using the technology of single preimplantation embryo mRNA different display:single 8-cell and blastocyst stage embryos were studied using technology of mRNA different display and one different fragment was found.The result suggested that this fragment displayed high homology (99%) to cattle mRNA for ribosomal protein L31.Then to detect the expression of RPL31 mRNA in 8 cell and blastocyst stage embryos by real-time quantitative PCR,the result showed the relative amount of 8 cells was 3.2 times of blastocyst's. 相似文献
17.
[目的]构建抗黄瓜花叶病毒RNAi载体,并将载体转入烟草.[方法]采用RT-PCR方法,扩增黄瓜花叶病毒NS04加工番茄分离物的RNA2基因组的序列选取CMV RAN2基因组中的复制酶片段作为靶序列,构建pBi35SCR2真核表达载体,并对表达载体时行鉴定;通过农杆菌介导的方法将表达载体转入烟草,用PCR的方法检测载体是否转入.[结果]系统进化树分析结果表明,RNA2中编码CMV-2a的序列与中国浙江的DQ412731 分离物有较高核苷本乡酸及氨基酸同源性,分别达到98.0%和96.5%;RCR结果表明,试验成功构建了pBi35SCR2真核表达载体,并成功将表达载体转入烟草[结论]试验获得的转基因烟草可作为后期攻毒试验的材料,并为研究加工番茄抗黄瓜花叶病毒奠定了基础.
Abstract：
[Objective] Aimed to construct RNAi vector resistant to cucumber mosaic virus and transferred this vector into tobacco.[Method]RT-PCR method was used to amplify cucumber mosaic virus NSO4 and process RNA2 gene sequen of tomato isolates.The analysis results of phylogenetic tree demonstrated that the sequence in RNA2 encoded CMV-2a had 98.0% and 96.5% homology with nucleotide and amino acid of DQ412731 isolate of Zhejiang,China.The replicase fragment in CMV RAN2 gene was taken as target sequence to construct pBi35SCR2 eukaryotic expression vector,then the expression vector was identified.Through agrobacterium-mediated method,the expression vector was transferred into tabacco and PCR method was used to check the transfer.The PCR results demonstrated that the experiment had successfully construct eukaryotic expression vector of pBi35SCR2 and the expression vector was successfully transferred into tabacco. [Conclusion] The obtained transgenic tobacco could be used as challenge test material in following experiment and provided foundation for studying processing tomato resist cucumber mosaic virus. 相似文献
18.
底栖鱼类对水田上覆水中磷素动态的扰动效应 总被引：2，自引：0，他引：2
[目的]研究底栖鱼类泥鳅对水田上覆水中磷素动态的扰动效应,探讨生物扰动机制.[方法]基于模拟试验,使用离子色谱法和分光光度法,对比分析上覆水中磷素含量在有/无泥鳅活动时的差异.[结果]扰动组的TP、DTP和PP浓度在试验开始阶段与对照组无显著差异,在试验中、后期显著高于对照(P<0.05).扰动组要的PP/TP高于对照组,扰动组中TP浓度的增加主要是由于PP的增加,扰动组的DIP/DT在试验中、后期显著高于对照(P<0.05).[结论]底栖鱼类对水田上覆水中的磷素产生了扰动作用,增加了水稻生长可利用的的磷素养分.
Abstract：
[Objective] The research aimed to investigate the bioturbation effects of benthic fish Misgurnus anguillicaudatus on phosphorus dynamic in overlying water of paddy field,as well as to explore the bioturbation mechanism.[Method]Based on simulation experiment,the phosphorus contents in overlying water were analyzed comparatively with and without Misgurnus anguillicaudatus by the using of ion chromatography and spectrophotometry. [Result] The concentrations of total phosphorus (TP),dissolved total phosphorus(DTP)and particular phosphorus(PP) in bioturbation group had no significant differences with those in control group in initial stage of experiment,and became significantly higher than control group in middle and late stages of experiment(P<0.05).The PP/TP ratios in bioturbation group were bigger than those in control group,the increase of TP concentration in bioturbation group was mainly due to the increase of PP.The ratios of dissolved inorganic phosphorus(DIP) to DTP (DIP/DTP) were significantly bigger than those in control group in middle and late stages of experiment (P<0.05). [Conclusion] The benthic fish had bioturbation effects on phosphorus in overlying water of paddy field,which increased the available phosphorus for rice growth. 相似文献
19.
一株产紫杉醇的曼地亚红豆杉内生真菌的分离及鉴定 总被引：1，自引：0，他引：1
[目的]分离并鉴定1株产紫杉醇的曼地亚红豆杉内的内生真菌.[方法]从曼地亚红豆杉树皮内表皮中分离得到32株内生真菌,并通过高效液相色谱法检测其发酵产物.[结果]筛选获得1株可以产紫杉醇的内生真菌M57,其紫杉醇产量为45～50μg/L,并通过对M57菌落的形态学观察以及18S rDNA序列分析初步将其鉴定为根霉属(Rhizopus)真菌.[结论]该菌株的发现为微生物发酵法生产紫杉醇提供了具有潜在应用价值新的菌种.
Abstract：
[Objective] The aim was to isolate and identify a taxol-producing endophytic fungus from Taxus media.[Method]32 strains of endophytic fungi were identified form the inner bark of T.media,and their fermentation products were detected by high performance liquid chromatography (HPLC). [Result] Through the screening,a strain of taxol-producing endophytic fungi M57 was obtained,which could produce 45-50 μg/L of taxol,and M57 was defined as Rhizopus sp.through morphological observation and 18S rDNA sequence analysis. [Conclusion] The finding of Rhizopus sp.M57 provided a promising strain for producing taxol with taxol-producing fungi fermentation process. 相似文献
20.
依据最新NDB数据库中蛋白质-DNA复合物晶体结构数据,基于修正的DNA结构统计力学模型,利用蒙特卡洛多重积分计算DNA动力学结构的有关参数,并对计算得到的结果进行时间复杂度和精确度分析.
Abstract：
Based on protein-DNA complex crystal structural data in up-to-date Nucleic Acid Database,the related parameters of DNA Kinetic Structure were investigated by Monte-Carlo Multiple Integrals on the base of modified DNA structure statistical mechanical model,and time complexity and precision were analyzed on the calculated results. 相似文献