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《现代园艺》2016,(12)
对杜仲再生体系中不同途径愈伤组织的诱导、增殖、分化、茎段腋芽萌发、增殖、生根培养基激素组合进行了一系列优化试验。试验表明:叶片愈伤组织诱导的激素最佳组合及配比是NAA浓度为1.5mg/L,BA浓度为2.0mg/L,诱导率达94.4%;最佳增殖培养基的组合及配比是MS+NAA 1.0mg/L+BA 0.5mg/L等几组,诱导不定芽的培养基以MS+NAA 0.5 mg/L+BA 2.0mg/L为宜,诱导率达83%;在附加NAA 0.2mg/L+BA 1.0mg/L的MS基本培养基上外植体腋芽生长状况最佳,萌发率达98%;在附加1/4MS+IBA 2.0mg/L的茎段生根培养基上,生根率达43.3%。 相似文献
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以苹果试管苗叶片的再生不定芽嫩叶为试材,对苹果体细胞悬浮系的建立及植株再生的影响因素进行了研究.结果表明:在MS+NAA 0.5 mg/L+BA 2.0 mg/L培养基上可诱导获得高活力的愈伤组织.将该愈伤组织转入MS+2,4-D 2.0 mg/L+BA 1.0 mg/L液体培养基中培养,采用无菌筛网分离获得含单个细胞和少于8～10个细胞的小细胞团进行继代培养,建立体悬浮细胞培养系.将悬浮细胞转到MS+2,4-D 2.0 mg/L+BA 1.0 mg/L的固体增殖培养基上暗培养25 d后,可形成微型愈伤组织,将该愈伤组织转到MS+BA 5.0 mg/L+IAA 0.5 mg/L的植株再生培养基上暗培养30 d后转入光下,光照培养30 d后53％的愈伤组织可再生植株.该研究建立的苹果体细胞悬浮培养技术,不仅可用于细胞融合及遗传转化过程中杂种细胞和转化细胞的分离及植株再生研究,而且对于利用组织培养技术筛选变异株系也具有重要意义. 相似文献
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以萱草的根茎为材料,进行愈伤组织诱导和分化,试管苗的生根、移栽和移植的研究,建立萱草再生体系技术。结果证明:MS+BA0.4mg/L+NAA0.1mg/L+2,4-D0.1mg/L是愈伤组织诱导培养的理想培养基;MS+NH_4H_2PO_450mg/L+BA1.0mg/L+NAA0.1mg/L是愈伤组织增殖继代培养的理想培养基;MS+AgNO_30.5mg/L+GA_30.5mg/L+BA0.5mg/L+NAA0.1mg/L是愈伤组织分化培养的理想培养基;1/2MS+NAA0.1mg/L+IAA0.2mg/L是不定芽生根培养的理想培养基。在河沙中试管苗易移栽成活;移植到花坛中的试管苗根系发达、生长旺盛。 相似文献
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甘蔗幼叶组织培养中培养基的优化 总被引：1，自引：0，他引：1
对不同激素浓度质量组合对甘蔗愈伤组织的诱导、不定芽的分化和生根的效果进行研究。结果表明:MS+2,4-D 2.0 mg/L培养基对诱导愈伤组织和继代增殖较适宜;MS+NAA0 mg/L+BA 1.0 mg/L培养基对愈伤组织分化不定芽的效果为佳;1/2MS+NAA 0.5 mg/L+IBA 1.0 mg/L培养基对生根较好。通过这3个培养基培养出的甘蔗组培苗长势良好,表现为叶面积适宜、干物质积累多等方面。 相似文献
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研究以金缘连翘茎段为外植体,探索金缘连翘组织培养快速繁殖的技术体系.通过对金缘连翘进行初代培养、继代增殖培养、生根培养和移栽,金缘连翘外植体不同取材部位(如带腋芽的茎段,芽)及不同激素种类、浓度对芽诱导及增殖的影响,培养基不同配方的影响的研究,筛选出金缘连翘的最佳组织培养培养基配方.金缘连翘初代培养最佳培养基配方MS BA3.0mg/L NAA0.08mg/L IBA0.08mg/L;愈伤组织增殖最佳培养基配方MS BA2.0 mg/L IBA0.08mg/L NAA0.08mg/L;生根最佳培养基配方MS IBA0.04mg/L NAA0.04mg/L BA2.0mg/L. 相似文献
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紫薇的组织培养与快速繁殖 总被引：1，自引：0，他引：1
以紫薇嫩茎产生的愈伤组织为外植体,通过正交试验设计,研究不同培养基对紫薇丛生芽诱导、增殖和生根的影响。结果表明:不同浓度的NAA6、-BA及KT激素组合对紫薇愈伤组织丛生芽诱导培养的影响显著,最佳诱导培养基为:MS+NAA 0.05 mg/L+6-BA 0.5 mg/L+KT 0.5 mg/L;不同浓度激素组合对紫薇丛生芽增殖培养影响极显著,最佳增殖培养基为:MS+NAA 0.05 mg/L+6-BA 2.0 mg/L+KT 1.0 mg/L;不同培养基对紫薇生根培养的影响较显著,生根培养适合的培养基为:1/2MS+NAA 0.5 mg/L+6-BA 0.1 mg/L。 相似文献
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AIM: Although endovascular radiotherapy inhibits neointimal hyperplasia, the exact alterations induced by β-particles irradiation remain to be elucidated. The objective of this study was to investigate the ability and the cellular mechanism of local β-particles emission from 188Re to inhibit vascular smooth muscle cells (SMCs). METHODS: The SMCs in vitro were irradiated by 188Re with single doses of 2.6 Gy-25.8 Gy. The effects of β-particles on SMCs, such as effective irradiate doses, the period of inhibition for SMCs proliferation, the changes of cell proliferation rate and DNA synthesis rate, cell cycle progression and related gene expression, were investigated by cell count, [3H]-TdR incorporation, cell cycle progression analysis, cell viability and immunocytochemistry, respectivecy. RESULTS: β-particles irradiation with dose of 5.2 Gy could inhibit significantly SMCs proliferation. At dose of 20.6 Gy DNA synthesis inhibitory rate was 92%, SMCs proliferation rate was only 3%. Renoval of 188Re did not abolish the inhibitory effects of β-particles on SMCs proliferation. The expression of P53 was up regulation and PCNA was down regulation after irradiation. CONCLUSION: β-particles from 188 Re was significantly effective and permanent in inhibiting SMCs proliferation, and inhibitory effect was in dose-dependet manner ED50was 5 Gy, the best dose to inhibit SMCs proliferation was 20 Gy. β-particles irradiation induced SMCs to occur G0/G1 arrest, damaged the ability of SMCs reproliferation and led to cell clonogenic death. P53 and PCNA had regulatiory effects on SMCs proliferation after β-particles irradiation. 相似文献
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AIM:To study the effect of L-Arg on plasma content of endothelin (ET) and the expression of proto-oncogene c-fos mRNA in the left ventricle of rats with renovascular hypertensive hypertrophy. METHODS: The level of c-fos mRNA were measured by in situ hybridization. The ET in plasma were measured by radioimmunoassay. RESULTS:After eight weeks of treatment with L-Arg, the expression of c-fos decreased markedly (P＜0.01). The ET content in plasma also decreased significantly by L-Arg(P＜0.01).CONCLUSION: Plasma ET content and the expression of c-fos in the left ventricle of rats with renovascular hypertensive hypertrophy could be decreased by L-Arg administration. 相似文献
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《International Journal of Fruit Science》2013,13(3):101-120
Abstract Saskatoon berry (Amelanchier alnifolia Nutt., Rosaceae) and blueberry (Vaccinium corymbosum L., Ericaceae) are substantially equivalent in all characteristics that are important to the consumer, including fruit color, shape, size, nutrition, texture, and uses. In addition, both fruits are native to North America and they have practically identical historical uses and known health benefits. Their composition, processing, nutritional value and metabolism, intended uses, and levels of undesirable substances are compared. 相似文献
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The objective of this study was to establish a cryopreservation protocol for hawthorn shoot apices (Crataegus pinnatifida Bge.). Cryopreservation was carried out via encapsulation–dehydration, vitrification, and encapsulation–vitrification on shoot apices excised from in vitro cultures. We began by showing that cold-acclimation enhanced the regrowth of cryopreserved apices from 10.0 to 65.5% in encapsulation–dehydration. We then decided that the encapsulation–dehydration method was an optimal cryopreservation method for hawthorn shoot apices in terms of its high recovery after cryopreservation as well as its ease of use compared with vitrification and encapsulation–vitrification. In encapsulation–dehydration, the protocol leading to optimal regrowth was as follows: after cold-acclimation at 5 °C in the dark for 2 weeks, excised shoot tips were pretreated for 24 h at 25 °C on hormone-free Murashige and Skoog [Murashige, T., Skoog, F., 1962. A revised medium for rapid growth and bioassays with tobacco tissue culture. Physiol. Plant. 15, 473–497] (MS) basal medium with 0.4 mol/L sucrose, then encapsulated and precultured in liquid MS medium with 0.8 mol/L sucrose for 16 h at 25 °C. Precultured beads were dehydrated for 6 h at 25 °C in the dessicator containing 50 g silica gel to a moisture content of 15.3% (fresh-weight basis) before cryostorage for 1 h. In addition, we examined the effect of adding glycerol to both the alginate beads and loading solution to enhance regrowth after cryopreservation in encapsulation–dehydration. In the present study, it was shown that adding 0.5 mol/L glycerol resulted in high regrowth percentages (82.5–90.0%) in four Crataegus species. 相似文献
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多效唑对猕猴桃离体试管苗生长及内源激素的影响 总被引：18，自引：0，他引：18
多效唑（ＰＰ３３３）处理猕猴桃试管苗，降低了其生长强度；植株体内的ＧＡ３、ＩＡＡ和ＺＴ含量下降，ＡＢＡ的含量上升，乙烯释放率增加；并且能降低外源的ＧＡ３和ＩＡＡ促进生长的作用，而外源的ＧＡ３和ＩＡＡ又能不同程度地逆转多效唑的抑制作用，使植株恢复生长。 相似文献
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HU Zhi-cheng ZHU Jia-yuan ZHU Bin GUO Dong CHEN Bin ZHANG Kai HU Kun-hua LI Ming-tao TANG Bing 《园艺学报》2011,27(9):1802-1806
AIM: To investigate and screen the sensitive proteins in the formation mechanism of pathological scars by comparing the results of differential proteomic analysis between pathological scars and normal skin.METHODS: Two-dimensional gel electrophoresis was used to detect the protein expression profiles in 8 keloid patients, 8 hypertrophic scar patients and 3 matched normal skin patients.The proteins that showed differential expression of over 4-fold change were cut and analyzed by MALDI-TOF/TOF mass spectrometry.RESULTS: A two-dimensional protein profiling comparison between pathological scars and normal skin was successfully established.On average, 2 978 spots in keloid, 2 975 spots in hypertrophic scar and 3 053 spots in normal skin were identified using gel analysis software.Compared with normal skin, there were totally 36 differentially-expressed proteins in keloid and hypertrophic scar identified from the spots of over 4-fold change, including 16 proteins in both keloid and hypertrophic scar (8 up-regulated and 8 down-regulated), 11 only in keloid (9 up-regulated and 2 down-regulated) and 9 only in hypertrophic scar (4 up-regulated and 5 down-regulated).CONCLUSION: Proteomic analysis can identify the proteins with variance of pathological scars versus normal skin, thus providing probable new clues to reveal the formation mechanism of pathological scars. 相似文献
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AIM:To investigate the effect of metallothionein(MT) on proliferation of rat vascular smooth muscle cells (VSMCs) stimulated by homocysteine and its mechanism. METHODS:VSMCs proliferation was measured by [3-H]-TdR incorporation, mitogen-activated protein kinase(MAPK)activity were determined by immunoprecipitation method, the intracellular contents of MT and malondialdehyde (MDA)were assayed by -hemoglobin saturation method and TBA reaction, respectively, and lactate dehydrogenase (LDH) leakage was measured by NADH oxidation. RESULTS:Hcy(10-6-10-4 mmol/L) stimulated [3-H]-TdR incorporation by the VSMCs in a concentration-dependent manner. Compared with control, [3-H]-TdR incorporation in VSMCs treated with 0.1 mmol/L Hcy was increased by 4.2 fold (P＜0.01). Meanwhile, Hcy enhanced MAPK activity, MDA formation and LDH release (P＜0.01)in a concentration-dependent manner. Treatment of VSMCs with MT alone did not change above parameters, compared with control. However, MT (10-6-10-4 mol/L)attenuated significantly Hcy-stimulated proliferation of VSMCs (P＜0.01)in a concentration-dependent manner. And MT inhibited obviously Hcy-induced activation of MAPK activity, MDA formation and LDH release. Preincubation of VSMCs with 0.5 mmol/L ZnCl2 for 6 h induced an increase cellular MT content by 5.7-fold (P＜0.01). The MT-overexpressed VSMCs resisted Hcy-stimulating action on MAPK activity, MDA formation and LDH leakage (P＜0.01). CONCLUSION:These results show that MT has an inhibitory effect on Hcy-induced VSMCs proliferation, and that MT could inhibit Hcy-stimulated MAPK activity and lipid peroxidation. 相似文献
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Duncan Brean W. Boyle Shannon Breininger David R. Schmalzer Paul A. 《Landscape Ecology》1999,14(3):291-309
Historic landcover dynamics in a scrubby flatwoods (Tel-4) and scrub landscape (Happy Creek) on John F. Kennedy Space Center were measured using aerial images from 1943, 1951, 1958, 1969, 1979, and 1989. Landcover categories were mapped, digitized, geometrically registered, and overlaid in ARC/INFO. Both study sites have been influenced by various land use histories, including periods of range management, fire suppression, and fire management. Several analyses were performed to help understand the effects of past land management on the amount and spatial distribution of landcover within the study sites. A chi-squared analysis showed a significant difference between the frequency of landcover occurrence and management period. Markov chain models were used to project observed changes over a 100-year period; these showed current management practices being effective at Tel-4 (restoring historic landscape structure) and much less effective at Happy Creek. Documenting impacts of past management regimes on landcover has provided important insight into current landscape composition and will provide the basis for improving land management on Kennedy Space Center and elsewhere. 相似文献
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AIM: Previous studies performed with XBP-01 in vitro indicated that XBP-01 could inhibit vascular smooth muscle cells from being transformed into foam cell and could eliminate the atherosclerotic plaque in C57BL/6J mouse. This experiment is to investigate its mechanism of eliminating plaques in vitro. METHODS: The cultured porcine artery smooth muscle cells incubated with XBP-01 of 0.1 mg/L for 24 h after preincubated with oxidized low density lipoprotein of 15 mg/L for 72 h in vitro. The samples were analyzed by fluorescence microscope, confocal microscope system and flow cytometry. RESULTS: Apoptosis was triggered by being incubated with oxidized low density lipoprotein and this process was accelerated additionally by being incubated with XBP-01. CONCLUSION: XBP-01 can be effective in eliminating atherosclerotic plaque by accelerating the process in which oxidized low density lipoprotein induced smooth muscle cell apoptosis. 相似文献
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XUE Ying-sheng WANG Jing-feng NIE Ru-qiong WU Wei-kang LUO Han-chuan CHEN Xiao-wei 《园艺学报》2004,20(4):603-607
AIM: To investigate the influence of Sini decoction (SND) on the proliferation and apoptosis of rabbit abdominal aorta smooth muscle cells after ballon injury and discuss the effect of vascular smooth muscle cell's (VSMCs) proliferation and apoptosis in post-percutaneous coronary intervention (PCI) restenosis (RS) and the feasibility of SND preventing post-PCI RS. METHODS: The animal model of rabbit abdominal aorta ballon injury was set up and the therapertic group was treated with SND. The shape of proliferative and apoptotic cell were investigated by electron microscope. Immunohistochemistry staining was performed using α-actin,PCNA and Cyclin E monoclonal antibodies. In situ Cell Death Detection Kit was used to identify apoptotic cells. Abdomial aorta angiography was operated in the 84th day subgroup and the stenosis degree was evalued by quantitative angiographic analysis. RESULTS: As compared with the control group, the therapeutic group displayed a lower proliferative percentage and a higher apoptosic percentage (P<0.05). Moreover, the apoptosic peek time was on the 14th day after operation,which was longer than the control group. CONCLUSION: SND effectly inhibited the proliferation of VSMCs and iuduced apoptosis in VSMCs. 相似文献