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1.
唐菖蒲瓶插保鲜成分保鲜效应初探 总被引：5，自引：0，他引：5
采用4因子3水平正交试验设计探讨了4种保鲜剂成分对唐菖蒲切花的瓶插保鲜效果及其最佳组台配方。结果表明：(1)蔗糖和KCI对唐菖蒲切花有延长瓶插寿命，提高开花率．增加观赏值，改善切花品质的作用。(2)蔗耱可促进花朵开放，具有催花效应；而其余3种保鲜成分均延迟切花开放。(3)8-HQ低浓度处理缩短瓶插寿命，降低开花率和总观赏值，而高浓度处理效果相反。(4)AgNO3降低开花率．其低浓度处理可延长瓶插寿命，增加总观赏值。(5)本试验处理组合V和Ⅵ升唐菖蒲切花综台保鲜效应较好。 相似文献
2.
在荔枝果园常常看到妃子笑荔枝有花无果,其主要原因是由于开花授粉期营养大量流失或缺乏具有授粉能力的花粉而造成花而不实。因此．必须配种授粉树：在妃子笑花穗期必须通过控制花穗,对花穗进行抹控、疏花、短截处理,使其大大减少花量：同时必须通过环扎保果才能获得高产。但其做法．是必须培植有健壮的结果母枝。并且抽出粗壮花穗．这样才能达到预期的效果．其关键的三个方面的技术措施和做法如下。 相似文献
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光照长度对早、中、晚熟三类唐菖蒲生长、开花的影响 总被引：2，自引：1，他引：2
试验对早、中、晚熟3种类型的唐菖蒲品种进行了三种光照长度处理，分别为8h(小时)、12h(小时)和14h～16h(小时)，并对植株的生长速率、花期、花茎长度、花序长度和每穗花上的小花数等性状进行了研究。结果表明：8h(小时)和12h(小时)的短日照条件能够促进唐菖蒲开花，有提前花期的作用，但开花质量均有不同程度的下降。晚熟品种花期提前最多，可达12d～19d(天)；中熟品种次之，可提前9d～15d(天)，早熟品种花期能够提前2d～5d(天)。 相似文献
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１环割促花，提高着果率对旺壮树于花穗萌动时在３～４级枝上环割，可促进花穗发育和开花着果。２人工摘叶，花穗打顶人工摘除花穗上的幼嫩红叶，并在花穗主轴１０～１５ｃｍ长时，将其顶端摘去，抑制顶芽延伸，促进侧穗的发育。３喷药控杀用４０％乙烯利３０ｍｌ加１５％... 相似文献
6.
以铁线莲早花大花型重被品种“爱丁堡公爵夫人”为试材,研究了50、100和200 mg/L不同浓度梯度的赤霉素(GA3)和多效唑(PP333)2种外源激素对铁线莲“爱丁堡公爵夫人”开花的影响.结果表明:不同浓度梯度的GA3均有推迟开花的作用,200 mg/L GA3推迟开花36 d,100 mg/L GA3推迟开花34 d,50 mg/L GA3推迟开花22 d.PP333推迟开花的作用没有CA3明显,200 mg/L PP333推迟开花9d,100 mg/L PP333推迟开花7d,50 mg/L PP333没有推迟开花的作用.2种外源激素对“爱丁堡公爵夫人”单花开放时间的影响不显著.较高浓度的GA3减少平均开花数量,而较高浓度的PP333增加平均开花数量.2种外源激素均使花朵平均直径和花柄平均长度减小,GA3使“爱丁堡公爵夫人”由重被花转为单被花,在一定程度上影响了花朵的质量. 相似文献
7.
提高葡萄果实品质的几项技术 总被引：1，自引：0，他引：1
1 新梢重摘心 要求对结果枝在开花前 6～ 7d(天 ) ,在果穗以上留 5～ 6片叶摘去顶部 ,摘心后 ,副梢相继萌发 ,除顶部副梢留 4叶摘心外 ,其余副梢留1叶摘心 ,第 2次副梢萌发后仍留 1叶摘心 ,对发育枝应同时进行摘心 ,可根据生长强弱留 1 0～ 1 2片叶。2 疏花穗 疏花穗一般在花序伸展后到开花前完成 ,疏除花器发育不好、花蕾少、穗梗细的劣质花穗 ,一般旺长新梢留 2～ 3个花穗 ,中庸枝留 1个花穗 ,弱枝 2枝留 1个花穗。3 疏果 一般在花后 1 5～ 2 5 d(天 )果粒约有黄豆粒大小时进行 ,不同品种的果穗重标准与果粒大小有差异 ,因此留粒数… 相似文献
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采用4因子3水平正交试验设计探讨了4种保鲜剂成分对唐菖蒲切花的瓶插保鲜效果及其最佳组合配方.结果表明:(1)蔗糖和KC1对唐菖蒲切花有延长瓶插寿命,提高开花率,增加观货值,改善切花品质的作用.(2)蔗糖可促进花朵开放,具有催花效应;而其余3种保鲜成分均延迟切花开放.(3)8-HQ低浓度处理缩短瓶插寿命,降低开花率和总观赏值,而高浓度处理效果相反.(4)AgNO_3降低开花率,其低浓度处理可延长瓶插寿命,增加总观赏值.(5)本试验处理组合V和Ⅵ对唐菖蒲切花综合保鲜效应较好. 相似文献
10.
为探明自花、异花花粉在果梅花的不同发育阶段原位萌发及生长的特性,以细叶青果梅为材料,取开花前6、4、2d、开花当天和花后2d的花(花蕾),分别于自花、异花授粉(莺宿)后12、24、48、72、96h切取花柱,用FAA固定液处理,荧光染色后压片观察。结果表明,自花花粉在柱头上的萌发率略低于异花(开花前4d存在显著差异),开花前6、4d极显著低于其他各阶段,花蕾越幼小花粉萌发越差,开花当天花粉萌发率超过80%;开花前4d之前的花柱内异花花粉管数量显著低于开花前2d及之后各期的,果梅开花前4d以前的花发育不充分;开花后2d生长到花柱基部的异花花粉管数量较多,属于有效授粉期。果梅在开花前4d开始具备抑制自花花粉管生长的能力,并且随着花的发育逐渐增强,开花当天最强,开花后开始减弱。果梅自交授粉期以开花前2～3d为宜。 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
12.
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
13.
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
14.
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
15.
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
16.
Species distribution models (SDMs) often use elevation as a surrogate for temperature or utilise elevation sensitive interpolations
from weather stations. These methods may be unsuitable at the landscape scale, especially where there are sparse weather stations,
dramatic variations in exposure or low elevational ranges. The goal of this study was to determine whether radiation, moisture
or a novel estimate of exposure could improve temperature estimates and SDMs for vegetation on the Illawarra Escarpment, near
Sydney, Australia. Forty temperature sensors were placed on the soil surface of an approximately 12,000 ha study site between
November 2004 and August 2006. Linear regression was used to determine the relationship with environmental factors. Elevation
was correlated more with moderate temperatures (winter maximums, summer minimums, spring and autumn averages) than extreme
temperatures (summer maximums, winter minimums). The correlation (r
2) between temperature and environmental factors was improved by up to 0.38 by incorporating exposure, moisture and radiation
in the regressions. Summer maximums and winter minimums were predominately determined by exposure to the NW and coastal influences
respectively, while exposure to the NE and SW was important during other seasons. These directions correspond with the winds
that are most influential in the study area. The improved temperature estimates were used in Generalised Additive Models for
37 plant species. The deviance explained by most models was increased relative to elevation, especially for moist rainforest
species. It was concluded that improving the accuracy of seasonal temperature estimates could improve our ability to explain
the patchy distribution of many species.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
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AIM: To detect the expression of cytoplasmic inhibitor of apoptosis protein 2 (c-IAP2) and growth arrest-specific gene 1 (GAS1) in Hodgkin's lymphoma (HL) and anaplastic large cell lymphoma (ALCL) and to investigate the role of two genes in the pathogenesis of HL and ALCL.METHODS: HE staining, the antibodies CD30, CD15, CD45RO and CD20 were used to screen the cases of HL and ALCL from 288 cases of lymphoma. The clarified HL and ALCL were subjected for immunohistochemical staining by SP and ABC methods to analyze the expression of c-IAP2 and GAS1. RESULTS: ①The positive rate of c-IAP2 in HL was 25/26(96.1%) while that in ALCL was 6/19(31.6%), there presented statistic significance between HL and ALCL groups(P<0.05), meanwhile the positive rate of GAS1 showed statistic significance between HL and ALCL groups(P<0.05). ②Two cases were showed to be a mixed type combined with large tumor cells of HL and relatively smaller tumor cells of ALCL.CONCLUSION: ①The different expression of c-IAP2 and GAS1 in HL and ALCL implied a different mechanism of oncogenesis and the different defects in the pathway of signal transduction of apoptosis in HL and ALCL;②Few cases showed an overlap and a likely transitional state between HL and ALCL; ③The different expressing manner of GAS1 and c-IAP2 in HL and ALCL implied the potential marks for the differential dignosis of two kinds of lymphoma. 相似文献
18.
Effects of patch attributes, barriers, and distance between patches on the distribution of a rock-dwelling rodent (Lagidium viscacia) 总被引：1，自引：0，他引：1
We tested whether size of habitat patches and distance between patches are sufficient to predict the distribution of the mountain
vizcacha Lagidium viscacia a large, rock-dwelling rodent of the Patagonian steppe Argentina, or whether information on other patch and landscape characteristics
also is required. A logistic regression model including the distance between rock crevices and depth of crevices, distance
between a patch and the nearest occupied patch, and whether or not there was a river separating it from the nearest occupied
patch was a better predictor of patch occupancy by mountain vizcachas than was a model based only on patch size and distance
between patches. Our results indicate that a simple metapopulation analysis based on size of habitat patches and distance
between patches may not provide an accurate representation of regional population dynamics if patches vary in habitat quality
independently of patch size and features in the matrix alter connectivity.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
19.
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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