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1.
五种矿质元素对金银花花粉活力的影响 总被引：3，自引：0，他引：3
分析了5种矿质元素对金银花花粉活力的影响.结果表明:不同矿质元素Ca、Mn、B、K、Na等对金银花成熟花粉活力的作用效果不同,同一矿质元素的不同浓度对其活力的影响也有所不同.在Ca、Mn、B、K、Na等5种矿质元素中,萌发率以30 mmol/L MnCl2的作用效果最好,达到15.64%,远远高于对照组(1.53%);而生长速率方面则以10 mmol/L H3BO3的作用效果最佳,达到333.754 μm/h,远远超过了对照组(48.921 μm/h).Ca最好的浓度是20 mmol/L,KH2PO4最好的浓度是12 mmol/L,而EDTA二钠最好的浓度是6.0 mmol/L. 相似文献
2.
核桃壳与木屑栽培平菇的营养成分对比分析 总被引：1，自引：0，他引：1
测定了以核桃壳为基质(受专利保护)栽培平菇的主要营养成分和矿质元素,通过与木屑为基质栽培平菇的营养成分和矿质元素比较,结果发现:核桃壳种植的平菇粗纤维和多糖的含量明显高于木屑栽培的平菇,粗纤维和多糖分别相差13.8%和3.64%;蛋白质含量略低,相差4.5%;核桃壳组平菇矿质元素含量较高,尤其是铁和锌的含量,核桃壳组平菇铁和锌分别高于木屑组平菇32.3mg.kg-1和36.3mg.kg-1。 相似文献
3.
测定珍稀濒危植物贵州苏铁植株,构建不同组织和器官矿质营养元素的含量,分析矿质营养在体内分布特征及其相关特性,以及结合生长环境土壤特性分析贵州苏铁生长发育对营养需求以及土壤环境供给之间的关系,研究珍稀濒危植物贵州苏铁植株矿质营养含量及与土壤环境的相互作用,为贵州苏铁栽培和物种保护提供参考.结果表明:植株体内N、P元素含量变化较大,4a生植株体内比1 a生积累更多Fe、Mn、Zn、Ga、Mg元素,小孢子叶Zn含量最高,大孢子叶Mn含量最高,雄性叶元素含量高于雌性叶.表明贵州苏铁生长发育过程中生殖生长需要大量种类和数量的矿质营养物质,同时也证明了营养生长物质服务于生殖生长.在栽培生产中除了选择栽培基质与原生地大致相同满足植株的营养生长外,还更应注重在生殖时期对矿质营养的补给,满足植物生殖生长对矿质营养的需求. 相似文献
4.
【目的】山核桃是我国重要的高效生态经济型干果树种,研究比较21个浙江山核桃无性系的果实内含物矿质元素差异,评价山核桃果实矿质营养特性,为筛选高矿质营养价值的山核桃种质资源提供基础。【方法】采用国家标准方法对山核桃果实种仁中所含的K、Ca、Na、Mg、Zn、Cr、Mn、Fe、Cu共计9种矿质元素进行测定,通过变异性分析、正态性检验、相关性分析、主成分分析、系统聚类和概率分级法对参试无性系进行分析与评价。【结果】(1)山核桃的矿质营养性状变异较为丰富,变异系数在8.93%~64.51%之间,其中变异幅度较大的有Cr(64.51%)、Na(45.73%)、Mn(23.90%)、Fe(19.75%);各指标均符合正态分布;有5对指标间呈极显著正相关,10对呈显著正相关。(2)主成分分析结果表明,将9种矿质元素指标综合为4个成分因子,可代表原始数据88.19%的信息量。(3)聚类分析表明,21个山核桃无性系可根据综合成分得分聚为3类,各类别间矿质营养品质有较大差别(;4)对3个变异系数≥15%的矿质元素指标进行5级概率分级,对5个变异系数<15%的矿质元素指标进行3级概率分级,结果与主成分分析基本一致。【结论】21个浙江山核桃无性系果实矿质营养性状变异较为丰富且均符合正态分布,其中有18个性状指标间呈极显著或显著相关;在主成分分析的基础上将21个山核桃无性系聚为3大类,综合筛选出大源3号、高岭8号、徐坑24号、徐坑88号、高岭3号、大源4号6个优质无性系,其中高岭8号与大源4号有作为优质果用无性系选育引种的潜力。 相似文献
5.
基于因子分析和聚类分析的杧果种质矿质元素含量评价 总被引：6，自引：0，他引：6
以53个杧果品种的套袋果实为试材,测定其10个矿质元素含量,运用因子分析和聚类分析等统计方法对矿质元素含量特征进行分析。结果表明,不同品种果实中矿质元素含量存在显著差异,10种元素平均含量依次为：K > P > Mg > Ca > Na > Mn > Fe > Zn > Cu > B,变异系数在16.79%（P）~ 52.28%（Mn）之间;各矿质元素含量均服从正态分布;Mg与Mn、Zn、Cu、P、K、B之间,Zn、Cu、K两两之间,P与K之间均呈显著正相关;K、P、Ca、Mn和B是杧果果实的特征矿质元素;53个品种可以分为4类：（1）高K、P、Mg、Zn和Cu 含量的品种11个,（2）高Na和Fe含量的品种18个,（3）低Mg、Zn和K含量的品种8个,（4）低Ca、B和Mn含量的品种16个。 相似文献
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以富集矿质元素钙、铁、锌的桦纤孔菌为试验材料进行营养成分分析。结果表明:富集矿质元素后,桦纤孔菌中各营养成分含量普遍升高。富集矿质元素铁的桦纤孔菌的氨基酸、粗脂肪、粗灰分、粗蛋白含量均最高,其谷氨酸含量高达5.43%,比对照高3.14%;粗脂肪含量高达135.38 mg/g,比对照高55.03 mg/g;粗灰分含量高达50.90 mg/g,比对照高2.39 mg/g;粗蛋白含量高达21.34%,比对照高1.11%。富集矿质元素钙的桦纤孔菌的粗纤维含量最高,达41.72%,比对照高2.59%。 相似文献
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9.
以‘木纳格’葡萄为试材,研究了新疆阿图什沙土、壤土、粘土质地对初果期和盛果期果园葡萄果实品质和矿质元素的影响,测定了不同土壤栽培条件下不同树龄‘木纳格’葡萄果实的可滴定酸、可溶性固形物、可溶性糖、维生素C等果实品质指标及其矿质元素含量,以探索不同土壤类型和不同树龄对葡萄果实品质和矿质元素的影响。结果表明:不同土壤类型下不同树龄葡萄果实品质之间存在一定的差异,沙土初果期和盛果期果园的葡萄果实可溶性固形物和维生素C含量最高,可滴定酸含量最低,3种土壤盛果期果园果实可溶性糖含量基本一致,不存在显著性差异;壤土初果期果园果实可溶性糖含量高于其余2种土壤,并与沙土呈显著差异(P0.05),与粘土呈极显著差异(P0.01);不同土壤类型下不同树龄葡萄果实矿质元素之间也存在一定的差异。不同土壤类型和不同树龄对‘木纳格’葡萄果实品质和矿质元素影响较大,沙土的果实品质最佳;不同土壤类型矿质元素之间存在一定的差异。因此,要根据不同葡萄园土壤类型、树龄等实际情况,采用适合的平衡施肥技术。 相似文献
10.
研究喷施不同质量浓度的硒(Na2Se O3),灰树花子实体对硒的富集、矿质元素(Mg、Zn、K)和粗多糖含量的影响。结果表明:喷硒质量浓度为60 mg/L时灰树花子实体Se含量最高,是对照的12倍,喷施20、80 mg/L质量浓度硒时,对灰树花子实体中矿质元素Mg、Zn、K含量影响较大,20 mg/L时矿质元素K含量最高,80 mg/L时矿质元素Mg、Zn的含量均达最高,高于对照40.11%和150.82%,100 mg/L时,粗多糖含量最高,高于对照61.3%。综合考虑,喷施质量浓度为60~100 mg/L硒时对灰树花子实体Se、矿质元素(Mg、Zn、K)和粗多糖的形成最为有利。 相似文献
11.
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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AIM: To examine the autoantibody against α1-adrenoceptor and its biologic activities during the development of renal hypertension. METHODS: Renal hypertension of rat was achieved by clipped renal artery, the titre of autoantibody to α1-adrenoceptor was detected using ELISA immunoassay. Furthermore, the biological offects of these autoantibodies on cultured cardiomyocytes were also examined. RESULTS: After two weeks of clipping renal arteries, both the frequency of occurrence and the titre of autoantibodies to cardiac α1-adrenergic receptor were significantly increased as compared with the control of pre-treatment. The increased autoantibodies lasted for several weeks and then automatically decreased gradually to the pre-clipping level at 12 weeks. The biological effects of these autoantibodies displayed an "agonistic-like" activities on the beating frequency of cultured neonatal cardiomyocytes. CONCLUSION: Autoantibodies against α1-adrenoceptor may play a role in the elevation of peripheral vascular resistance and in the development of cardiac hypertrophy in rats with renal hypertension. 相似文献
13.
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
14.
《International Journal of Fruit Science》2013,13(1):139-156
Abstract This review is based partly on complete articles and partly on abstracts. Three of the 60 articles deal with the total uptake of elements in strawberry plant organs in two different strawberry production systems, both considered as optimal concerning amount and balance of elements. The effect on fruit quality may be dramatic if the level of a particular element is outside this range, but there may also be effects initiated by differences within the optimal range of elements. Most articles refer to product oriented quality, but some focus on consumer oriented quality, as discussed by Shewfelt (1999). The discussion here is on a general basis, so one should keep in mind that there are cultivar differences and that specification of nutrition ideally should mirror the needs of a single cultivar, or a group of cultivars with similar requirements. Also, to get a complete understanding of the subject future reviews should embrace a broader access of information including the effect on plant development of individual elements, such as the role of calcium in fruit firmness and its importance in cell wall structure. However, the intention here is to narrow the information to results that suggest a direct connection between nutrient uptake and fruit quality. 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
16.
GONG Yong-sheng LI Ji-wu YANG Peng-lin FAN Xiao-fang HU Liang-gang ZHENG Lü-zhen JIANG Zhong-sun 《园艺学报》2003,19(9):1261-1264
AIM:To investigate the effect of puerarin on pulmonary vessel collagen metabolism in pulmonary hypertension rats induced by chronic hypoxia and hypercapnia.METHODS:Collagen Ⅰ, Ⅲ and their mRNA were observed in pulmonary arterioles by the technique of immunohistochemistry and in situ hybridization.RESULTS:① Light microscopy showed media thickness of pulmonary arterioles was much higher in HH(hypoxic-hypercapnia) group than that of NC(normal control) group, and, vessel cavity turned more straiter in HH group than that of NC group.However, the damage of pulmonary arterioles in HP(hypoxic-pueratin) group was much slighter than that of HH group. ② The levels of plasma ET-1 and lung homogenates Hyr were much higher in HH group than those of NC group(P＜0.01), and lower in HP group than HH groups(P＜0.01).Plasma NO content in group HH was lower than that of group NC(P＜0.01), it was higher in group HP than that of group HH(P＜0.01).③Expression of collagen Ⅰ and collagen Ⅰ mRNA in pulmonary arterioles were significantly higher in HH groups than those of NC group (P＜0.01), and they were lower in HP group than those of HH group (P＜0.01).Expression of collagen Ⅲ and collagen Ⅲ mRNA showed no difference among three groups(P＞0.05).CONCLUSION:Puerarin inhibited the deposition of collagen and improved pulmonary vessel remodeling. 相似文献
17.
Fulé Peter Z. Crouse Joseph E. Heinlein Thomas A. Moore Margaret M. Covington W. Wallace Verkamp Greg 《Landscape Ecology》2003,18(5):465-486
Fire regime characteristics of high-elevation forests on the North Rim of the Grand Canyon, Arizona, were reconstructed from fire scar analysis, remote sensing, tree age, and forest structure measurements, a first attempt at detailed reconstruction of the transition from surface to stand-replacing fire patterns in the Southwest. Tree densities and fire-/non-fire-initiated groups were highly mixed over the landscape, so distinct fire-created stands could not be delineated from satellite imagery or the oldest available aerial photos. Surface fires were common from 1700 to 1879 in the 4,400 ha site, especially on S and W aspects. Fire dates frequently coincided with fire dates measured at study sites at lower elevation, suggesting that pre-1880 fire sizes may have been very large. Large fires, those scarring 25% or more of the sample trees, were relatively infrequent, averaging 31 years between burns. Four of the five major regional fire years occurred in the 1700s, followed by a 94-year gap until 1879. Fires typically occurred in significantly dry years (Palmer Drought Stress Index), with severe drought in major regional fire years. Currently the forest is predominantly spruce-fir, mixed conifer, and aspen. In contrast, dendroecological reconstruction of past forest structure showed that the forest in 1880 was very open, corresponding closely with historical (1910) accounts of severe fires leaving partially denuded landscapes. Age structure and species composition were used to classify sampling points into fire-initiated and non-fire-initiated groups. Tree groups on nearly 60% of the plots were fire-initiated; the oldest such groups appeared to have originated after severe fires in 1782 or 1785. In 1880, all fire-initiated groups were less than 100 years old and nearly 25% of the groups were less than 20 years old. Non-fire-initiated groups were significantly older (oldest 262 years in 1880), dominated by ponderosa pine, Douglas-fir, or white fir, and occurred preferentially on S and W slopes. The mixed-severity fire regime, transitioning from lower-elevation surface fires to mixed surface and stand-replacing fire at higher elevations, appeared not to have been stable over the temporal and spatial scales of this study. Information about historical fire regime and forest structure is valuable for managers but the information is probably less specific and stable for high-elevation forests than for low-elevation ponderosa pine forests.This revised version was published online in May 2005 with corrections to the Cover Date. 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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以西双版纳黄瓜和‘华黄5号’黄瓜叶片为试验材料,研究了衰老过程中两种黄瓜叶片叶绿素含量变化及脱镁叶绿素脱镁叶绿酸水解酶基因PPH和脱镁叶绿酸a加氧酶基因PAO的表达。结果表明：随着叶片衰老,叶绿素a和叶绿素b含量显著降低,叶绿素a与叶绿素b的比值在0.5左右,推测叶绿素b的含量可能对黄瓜叶片保绿起到重要作用。荧光定量RT-PCR分析结果显示：PPH和PAO在西双版纳黄瓜叶片生长35 d时表达量最高,分别为5.50和1.86;PPH在‘华黄5号’叶片35 d时表达量最高,为7.14,而PAO在35和45 d表达量都很高,分别为3.90和3.91;PPH和PAO在西双版纳黄瓜叶片中的表达量低于在‘华黄5号’中。 相似文献