共查询到20条相似文献，搜索用时 15 毫秒
1.
两种砧木对年橘果实品质与产量的影响 总被引：2，自引：0，他引：2
AIM: To investigate the effect of ovariectomy (OVX) and simvastatin (SVS) on the expression of osteoprotegerin (OPG) in bone callus of rats. METHODS: Simvastatin (10 mg穔g-1穌-1) was injected subcutaneously to tissue overlying the site of fractured tibiae of ovariectomized rats for a treatment period of 5 days. Vehicle reagent was used as control in sham and OVX rats. Bone callus were harvested at time points of 1, 2 and 4 weeks after fracture and the expression of proliferating cell nuclear antigen (PCNA) and OPG was measured by the method of immunohistochemistry. RESULTS: Compared with OVX+vehicle group, the expression of PCNA decreased by 17.3%, 32.1% and 26.1% in OVX+vehicle group than that in sham+vehicle group (P<0.01), and increased by 60.1%, 67.7% and 67.7% in OVX+SVS group (P<0.01) at the time points of 1, 2 and 4 weeks after fracture, respectively. The expression of OPG was the lowest in OVX+vehicle group. The significant differences of OPG expression between OVX+SVS group and OVX+vehicle group at the 3 time points (P<0.01), and significant differences of OPG expression between sham+vehicle group and OVX+vehicle group at 1st week and 2nd week after fracture (P<0.05) were observed. CONCLUSION: Ovariectomy decreases the expression of OPG in bone callus of rats, while simvastatin increases it, indicating that simvastatin can indirectly inhibit the function of osteoclasts. 相似文献
2.
以4个大白菜品种和4个结球甘蓝品种为试材,对位于芸薹属结球甘蓝C基因组9个连锁群的458个InDel标记进行PCR筛选,筛选出286个结球甘蓝相对于大白菜的特异InDel标记,其中位于C01连锁群31个,C02连锁群45个,C03连锁群54个,C04连锁群24个,C05连锁群22个,C06连锁群20个,C07连锁群32个,C08连锁群34个,C09连锁群24个。利用结球甘蓝C02连锁群特异InDel标记对实验室创建的大白菜-结球甘蓝易位系自交后代进行了初步鉴定,明确了外源甘蓝染色体片段的物理位置在18 096 729 ~ 18 786 494 bp之间的689 764 bp区域内。 相似文献
3.
C. V. Economddes 《The Journal of Horticultural Science and Biotechnology》2013,88(3):393-400
Yield, fruit quality, growth and the levels of 12 elements in the leaves were measured for 12-year-old Marsh Seedless grapefruit trees on six rootstocks. Trees on rough lemon and Cleopatra mandarin were larger than those on sour orange and consistently produced 67 and 23 per cent more fruit respectively than on sour orange. Trees on Palestine sweet lime, Troyer and Morton citranges were the least productive. Three-year means of total soluble solids ranged from 9·4 per cent for fruit from trees on Palestine sweet lime to 11–2 per cent on Cleopatra mandarin. Fruit size was good on all rootstocks but effects of rootstock on levels of Mg, Na, Cl and B in the leaves were statistically significant. 相似文献
4.
菊花和除虫菊毛状体的比较 总被引：1，自引：0，他引：1
利用扫描电镜和荧光显微镜观测了菊花（Chrysanthemum morifolium）和除虫菊（Pyrethrum cinerariifolium）叶片与花序表面毛状体的类型、分布与密度及其在荧光下的颜色差异。结果表明：菊花和除虫菊表面同时存在形态各异的头状腺毛和T–形非腺毛两类毛状体。头状腺毛主要分布在菊花的叶片两面、管状花花冠外表面和舌状花花冠远轴面,子房表面几乎不存在或很少;而除虫菊除舌状花花冠近轴面外,叶片与花序的其它部位均有分布,且以子房部位密度最高。T–形非腺毛在两者叶片、苞片和花梗表面均有分布,管状花和舌状花表面则没有。紫外光下菊花和除虫菊叶片的头状腺毛均呈蓝色,但在除虫菊管状花顶部和舌状花远轴面还观测到一些浅绿色的头状腺毛,管状花子房表面的头状腺毛因发育阶段的不同而呈现由红到蓝的变化。所有T–形非腺毛在紫外光下均呈蓝色,蓝色荧光下呈黄色。讨论了这些差异与抗虫性之间的关系。 相似文献
5.
基于生态理念的香菇包装设计工作进行分析和研究,研究香菇包装在保证食材新鲜健康的前提下,符合运输物流标准和生态绿色理念,从现有的包装设计基础中发现可以提升的方向并进行更加深入的研究。 相似文献
6.
播期和密度对茎瘤芥主要经济性状的影响 总被引：3，自引：0，他引：3
为给茎瘤芥的标准化栽培技术提供依据,研究了播期和密度对茎瘤芥主要经济性状的影响。结果表明:(1)播期和密度对茎瘤芥瘤茎主要经济性状的综合效应明显。(2)播期对瘤茎的小区产量、横径有显著的正效应,对瘤茎的纵径、菜形指数有显著的负效应,对单株瘤茎产量有不明显负效应;密度对单株瘤茎重有显著的负效应,对瘤茎纵径有显著的正效应;对瘤茎小区产量、横径有不明显的负效应,对菜形指数有不明显的正效应。(3)播期和密度的交互作用显著地影响瘤茎的小区产量、单株瘤茎重、瘤茎纵径,对横径和菜形指数影响也明显。据此,建立了相应的数学模型。 相似文献
7.
8.
9.
行为心理学在园林设计中的应用 总被引：3，自引：0，他引：3
行为心理学在园林景观设计中应用越来越受到人们的重视.在园林景观设计中离不开人的思维活动,因此研究人类的行为心理在设计中必不可少.综述了行为心理学在园林设计中的应用现状,分析了国内外行为心理学在园林设计中的应用特点.发现,国内的研究主要集中在佘园设计、住宅区设计、广场设计、道路设计、商业步行街设计等具体应用方面.而国外的研究则更全面和深入,除了研究其在园林设计中的应用外,还对以人类的行为心理为主的园林设计理论进行了研究.分析国内外的研究进展,为创建合理的景观设计理论知识打下基础. 相似文献
10.
中国果树类病毒的发生及其研究进展(英文) 总被引：4，自引：0，他引：4
概述了在中国发生且己鉴定明确的5种果树类病毒,即苹果绣果类病毒(Apple scar skin viroid,ASSVd)、梨泡状溃疡类病毒(Pear blister canker viroid,PBCVd)、葡萄黄斑类病毒-1(Grapevine yellow speckle viroid-1,GYSVd-1)、柑橘裂皮类病毒(Citrus exocortis viroid,CEVd)和桃潜隐花叶类病毒(Peachlatent mosaic viroid,PLMVd)的研究进展,包括病害的首次发现、症状特征、发病规律、检测方法与防治对策以及这些类病毒的生物学与分子生物学特性。 相似文献
11.
12.
野生棘瓜砧木对黄瓜生长及抗逆性的影响 总被引：1，自引：1，他引：1
以瓜类野生种(棘瓜) 和黑籽南瓜为砧木、‘中农21号’黄瓜为接穗, 研究了棘瓜嫁接对黄瓜植株生长发育、耐寒性、光合速率、产量、抗病性以及果实品质的影响。结果表明, 棘瓜嫁接可使‘中农21号’黄瓜的第1雌花开放期和始收期提前, 对根瓜质量、20节内的雌花数、株高、最大叶面积、叶片数、茎粗和节数的影响小于‘黑籽南瓜’嫁接处理; 前者的抗寒能力、净光合速率强于后者和自根苗;棘瓜嫁接对黄瓜具有增产、抗枯萎病、抗根结线虫的作用, 并且果实品质显著优于以黑籽南瓜嫁接的。 相似文献
13.
以常规防治农药吡虫啉做对照,比较高效广谱抗生素农药阿维菌素和天敌昆虫瓢虫对枸杞田枸杞蚜虫的防治效果.结果表明:施用1.8%阿维菌素EC 2.5 mg/kg药后5 d和10 d的防效分别为54.0%和23.0%;2.5%吡虫啉WP 25 mg/kg 5 d和10 d的防效分别为71%和35%,对枸杞蚜虫防效理想.释放天敌昆虫瓢虫后5 d和10 d防效分别为-321.0%和-422.0%,防效差,单纯释放天敌瓢虫不能有效控制枸杞蚜虫的危害. 相似文献
14.
15.
16.
J. B. Free Yvette Spencer-Booth 《The Journal of Horticultural Science and Biotechnology》2013,88(1):54-60
In a dwarf-pyramid apple orchard, rows of Cox’s Orange Pippin adjacent to rows of Janies Grieve had greater initial and final fruit sets than rows between other Cox rows. Flowers on the south sides of trees tended to have a greater set of fruit than those on the north sides.In a sweet-cherry orchard containing a block of five rows of Early Rivers with pollinizer rows on each side, most fruit was set on the two outside rows and least in the centre row. Trees in the outside rows set more fruit on their sides facing the pollinizers than on their far sides. In another sweet-cherry orchard, Frogmore trees set more fruit on their south sides than on the other parts.In a dwarf pyramid orchard of Comice, the trees with one graft of Conference (every tenth tree) set more fruit than trees without a graft. However, the fruit set on Conference dwarf and standard trees (two orchards of each) did not differ with their distance from pollinizers. 相似文献
17.
细辛精油对5种木本花卉病害的离体抑菌效果比较 总被引：2，自引：0，他引：2
采用生长速率法和孢子萌发法测定了细辛精油对引起木本花卉叶部病害的5种病原菌(牡丹炭疽病、牡丹拟盘多毛孢叶斑病、月季黑斑病、肉桂链格孢叶斑病和龙血树镰孢叶斑病)的菌丝生长和孢子萌发的抑制作用.结果表明:细辛精油对牡丹拟盘多毛孢叶斑病菌菌丝生长和孢子萌发的抑制效果均为最好,EC50分别为120.43 mg/L和110.66 mg/L;对于同一种病原菌来说,细辛精油对牡丹炭疽病菌和肉桂链格孢叶斑病菌菌丝生长的抑制作用强于对其孢子萌发的抑制作用,对牡丹拟盘多毛孢叶斑病菌和龙血树镰孢叶斑病菌孢子萌发的抑制作用强于对其菌丝生长的抑制作用. 相似文献
18.
A wild mushroom found on banana pseudo-stem sheath was isolated, and was identified as Volvariella volvacea based on both morphological and molecular characteristics. The mycelia of wild strain grew on banana leaves better than on other raw materials. Furthermore the wild strain could produce fruit bodies on banana leaves with a biological efficiency of 26.4%, on rice straw with 23.76% and on pseudo-stem sheath with 17.11% by a method that involves using non-pasteurized materials. This result indicates that it is very important for the utilization of banana wastes to produce mushroom by cultivating the wild strain. 相似文献
19.
A. Garcia-Luis M. Kandušer J. L. Guardiola 《The Journal of Horticultural Science and Biotechnology》2013,88(5):817-825
SummaryThe effect of chilling temperatures on bud sprouting and flower formation was compared on fruiting and non-fruiting ‘Owari’ satsuma mandarin (Citrus unshiu Marc) trees. On non-fruiting trees, bud dormancy was weak, and a significant proportion of buds were able to sprout at high temperatures without being chilled. Separate effects of low temperatures on bud sprouting and flower induction were demonstrated. On fruiting trees these two effects of low temperatures were also demonstrated on summer-flush buds, but not on older (spring-flush) buds. The spring-flush buds from fruiting trees scarcely sprouted without being chilled. These buds required a longer chilling period for dormancy release than for flower induction, and it was not possible to separate the effect of low temperature on flower induction from the effect on dormancy release. The presence of fruit reduced flower formation by reducing bud sprouting. Furthermore, fruit had a direct inhibitive effect on vernalization which resulted in increased formation of vegetative shoots. The effect of fruit and low temperature on flowering was unrelated to carbohydrate accumulation in the leaves or the roots. 相似文献