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以东北百合的鳞片为材料进行扦插繁殖,比较了不同消毒剂、不同基质及鳞茎的不同层鳞片对扦插繁殖小鳞茎的影响.结果表明:在25℃避光条件下,用0.1% HgCl2处理鳞片,可有效防止鳞片腐烂,提高繁殖系数.以原生土、草炭+珍珠岩(1:1)这2种基质最好,诱导率达89.3%～93.3%,平均每鳞片繁殖小鳞茎数较高,达1.14～1.19个,产生的小鳞茎质量也较好,而且鳞片腐烂率低,生根效果也最好;草炭+河沙(2:1)及草炭+珍珠岩+蛭石(1:1:1)的扦插效果仅次于草炭+珍珠岩(1:1);河沙扦插鳞片时,平均每鳞片繁殖小鳞茎数最高,达1.38个,但诱导率最低(58.7%),易造成鳞片干萎,草炭则易造成鳞片大量腐烂,均不宜使用.鳞茎的外层鳞片比中、内层鳞片容易诱导出鳞茎,诱导率为100%,产生小鳞茎的数量最多,平均每鳞片繁殖小鳞茎数1.45个,小鳞茎平均直径也比中、内层的大. 相似文献
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以OT百合“Profundo”为材料，研究消毒剂、基质和植物生长调节剂对百合鳞片扦插繁殖的影响。结果表明：(1)经多菌灵800倍液处理10min，小鳞茎发生率最高，同时，小鳞茎数、根条数、繁殖系数等指标均表现尚可，为最佳消毒方法。(2)选用扦插基质河砂︰泥炭=1︰1，小鳞茎发生率和小鳞茎数均显著高于其他处理和对照，为最适宜基质。(3)不同植物生长调节剂对百合鳞片扦插繁殖影响不同，除6-BA和GA3,NAA、IAA、IBA这3种植物生长调节剂不同浓度处理的鳞片，在小鳞茎发生率、小鳞茎数、繁殖系数上均有不同程度的提高，其中，以200mg/L IBA处理的小鳞茎发生率和小鳞茎数最高。 相似文献
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以东方百合"索邦"、"白领"鳞片为试材,通过多层层积处理对小鳞茎的诱导、增殖、成球等因子进行研究.在相同的自然条件下,研究了不同基质之间、不同处理层之间以及同一鳞片上小鳞茎诱导的情况.结果表明:混合基质对小鳞茎的诱导倍数最高,分别较蛭石和草炭基质高出0.413和0.538倍;多层层积处理的处理层中,第1层的小鳞茎的诱导倍数最高,分别较第2层和第3层高出0.221和0.126倍;在同一鳞片上,基部再生的小鳞茎能力最强,边缘次之,凹面和背部再生小鳞茎能力最弱,在鳞片的顶部没有再生小鳞茎. 相似文献
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以美丽豹子花(Nomocharis basilissa)、多斑豹子花(Nomocharis meleagrina)、开瓣豹子花(Nomocharis aperta)3个不同野生品种为试材,研究了不同基质(草煤土、珍珠岩、锯末、草煤土∶腐殖质土∶珍珠岩=1∶1∶1)和同一基质(草煤土∶腐殖质土∶珍珠岩=1∶1∶1)不同物种下豹子花属植物鳞片扦插繁殖能力的差异。结果表明:基质配比及物种间差异对豹子花属植物扦插繁殖有显著影响;扦插基质结构的保水、保肥性决定了豹子花鳞片的萌发、小籽球的生根率及健壮程度;其中以草煤土及草煤土∶腐殖质土∶珍珠岩=1∶1∶1混合基质最优;不同基质中籽球平均直径主要依赖于母体鳞片大小,无显著差异;相同基质下,出芽时间开瓣豹子花最短、多斑豹子花居中、美丽豹子花所需的时间最长;开瓣豹子花平均繁殖系数相对较高,而平均繁殖系数与籽球直径存在一定反比关系。 相似文献
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GA3、IBA以及变温处理对东方百合鳞片扦插繁殖及淀粉降解的影响 总被引：2，自引：1，他引：1
以东方百合‘Sorbonne’为试材,研究了GA3、IBA以及温度处理对鳞片扦插繁殖以及碳水化合物代谢的影响。结果表明：GA3处理可在较短时间内促进小鳞茎膨大,IBA处理使小鳞茎形成的时间延后,但可提高繁殖系数和整齐度。GA3、IBA分别结合5 ℃预处理可使小鳞茎质量显著增加,在较短时间内促进小鳞茎膨大;其中IBA 100 mg · L-1,1 h结合5 ℃预处理的鳞片繁殖系数和小鳞茎整齐度依次高于25 ℃与15 ℃变温培养及25 ℃恒温培养;GA3 100 mg · L-1,2 h结合5 ℃预处理获得的小鳞茎品质最佳。鳞片繁殖过程中,GA3、IBA结合各温度处理鳞片淀粉及总可溶性糖含量均呈下降趋势,尤其鳞片下部在25 ℃培养初期（20 d）下降幅度最大;IBA促进淀粉降解,结合低温处理的母鳞片较无低温处理的总可溶性糖含量低,为小鳞茎的诱导和形成提供了营养;5 ℃低温预处理促进GA3处理母鳞片淀粉的降解。 相似文献
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植物生长调节剂对兰州百合鳞片扦插繁殖的影响 总被引：1，自引：0，他引：1
以兰州百合为试材,采用单因素随机区组设计和正交设计,研究了NAA、IAA、IBA、6-BA、2,4-D、GA36种植物生长调节剂及6-BA、NAA、2,4-D不同浓度配合对其鳞片扦插繁殖小鳞茎的影响。结果表明:植物生长调节剂能促进兰州百合鳞片扦插繁殖小鳞茎。180d后,200mg/L IBA处理的百合鳞片扦插繁殖系数最高,达到5.50,比对照高153.46%。综合分析,在激素配合处理中,6-BA 20mg/L+NAA 200mg/L+2,4-D 30mg/L处理,繁殖系数最高,平均为2.20;6-BA10mg/L+NAA 100mg/L+2,4-D 20mg/L处理,生成的小鳞茎重量最大,平均为1.83g/瓣,生产量最高,为3.16g/个。 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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Zusammenfassung Die Leistungsprüfungen wurden im Zeitraum 1997 bis 2003 mit den Unterlagen Gisela 4 und 5, den Klonnummern 195/20 und 497/8 aus der Gisela-Serie sowie Weiroot 10, 13, 53, 72 und 158 durchgeführt. Dabei dienten Sämlinge von P1 (bulgarische Selektion aus Prunus mahaleb) als Kontrolle. Alle Unterlagen waren mit der Sorte Stella veredelt und im Dezember 1996 in der Versuchsanlage der Agraruniversität in Plovdiv, Bulgarien, im Abstand von 6 m×4,5 m gepflanzt worden. Dabei erfolgte ein Pflanzschnitt. Nach Abschluss der natürlichen Kronenentwicklung wurde jedes Jahr ein Winterschnitt vorgenommen. Der Boden wurde durch mechanische Bearbeitung offen gehalten und nach dem 4. Standjahr wurden die Baumstreifen mit Herbiziden behandelt. Die Wasserversorgung erfolgte durch eine dem natürlichen Gefälle folgende Überflutung, allerdings nicht immer zum optimalen Zeitpunkt, da keine eigene Wasserquelle zur Verfügung stand.Basierend auf den Ergebnissen bis zum Anfang des 7. Standjahres können die untersuchten Unterlagen in zwei Gruppen differenziert werden: starkwüchsig—Weiroot 10, P1 und Weiroot 13; mittelstarkwachsend bis schwachwüchsig—Gi 497/8, Gisela 4, Weiroot 53, Weiroot 158, Gi 195/20, Weiroot 72 und Gisela 5. Letztere zeichnete sich durch besondere Schwachwüchsigkeit aus. Die meisten Wurzelschosser bildeten Gisela 4, Weiroot 10 und Weiroot 13. Weiroot 53, Weiroot 72 und Weiroot 158 entwickelten deutlich weniger und P1, Gisela 5, Gi 195/20 sowie Gi 497/8 keine Wurzelschosser. Den frühesten Blühbeginn induzierte Gisela 4. Die anderen Unterlagen führten, in Abhängigkeit von den Temperaturbedingungen des jeweiligen Jahres, zu einer Verspätung der Blüte: P1 und Weiroot 10 um 1–2 Tage; Gi 497/8, Weiroot 13 und Weiroot 158 um 2–4 Tage; Weiroot 72 um 2–7 Tage; Gi 195/20 um 3–6 Tage; Weiroot 53 um 3–8 Tage und Gisela 5 um 3–10 Tage. Die Reifezeit der Früchte war bei den Bäumen auf Gisela 5 im Vergleich zu den anderen Varianten um 2–3 Tage verspätet. Gisela 5, Weiroot 72 und Gisela 4 induzierten bei der aufveredelten Sorte die höchsten Ertragsleistungen, P1 die geringsten. Bei den Bäumen auf Gisela 5 war die Fruchtgröße geringer als bei den anderen Unterlagen. Bäume auf Gisela 5 brauchen intensive Pflege. Nur wenn alle Produktionsfaktoren und kulturtechnischen Maßnahmen optimiert werden, kann das hohe Ertragspotenzial dieser Unterlage ausgeschöpft werden. 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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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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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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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