生长调节物质对小豆豆芽营养成分影响和功能性评价     

郑琳琳  常暖迎  庞肖杰  康玉凡 《中国农业大学学报》2019,24(8):19-26

为筛选最适合芽菜培养的小豆品种,以‘白红8号’为试材,设置3种生长调节物质(乙酰水杨酸、乙烯利和6-苄氨基腺嘌呤(6-BA))的各6个浓度(0.0、0.1、0.2、0.3、0.4、0.5 mmol/L;0、20、30、40、50、60 mg/L和0、2、3、4、5、6 mg/L)喷施处理,测定其生物特性(上胚轴长度、上胚轴直径、萌发率、鲜重、干重和产出比)、营养成分(可溶性蛋白和可溶性糖)及抗氧化等特性。结果表明:3种生长调节物质喷施处理都能够提升其营养价值,在乙烯利喷施浓度为50 mg/L,‘白红8号’小豆芽苗菜中各营养成分、酶活性及抗氧化性等均可达到最大值,显著提高了其营养价值。因此,为提高生产中小豆芽苗菜的产量和营养价值,最终确定乙烯利喷施浓度为50 mg/L效果最佳。  相似文献   

Aversion of the feral pigeon and the house sparrow to pellets and sprouts treated with commercial formulations of methyl anthranilate     

Shmuel Moran 《Pest management science》2001,57(3):248-252

Two methyl anthranilate formulations, ReJex‐iT® TP‐40 and AG‐36, were tested as bird‐repelling agents for animal feed and vegetable sprouts, respectively. Feral pigeons (Columba livia) and house sparrows (Passer domesticus) are important pests of animal husbandry and field crops in Israel. In each 4‐day experiment, four birds were held together in an aviary, and were offered four trays or dishes with animal feed or cauliflower sprouts in four corners of the cage. The trays and dishes were transposed daily in a Latin square sequence. Pigeons consumed significantly more untreated feed than treated feed. When no alternative untreated food was offered, there was no significant repellency. Treatment of animal feed with TP‐40 to give 2.0 ml methyl anthranilate kg^?1 or less had no repellent effect on sparrows. Concentrations of 4.0 ml kg^?1 or more repelled the sparrows significantly. When no untreated feed was presented, pigeons and sparrows preferred the lowest concentration of methyl anthranilate presented. When AG‐36 was tested on vegetable sprouts, the sparrows tended significantly to avoid the highest concentration used—14.5 ml methyl anthranilate litre^?1 spray. The inter‐specific differences between the birds indicate that the efficacy of methyl anthranilate formulations as a repellent has to be specified for every species. This study did not determine (1) the possibility of developing habituation, (2) the behaviour of birds under natural conditions in the field, or (3) the influence of the feeding behaviour of a sympatric bird species on the repellency of methyl anthranilate to other species. © 2001 Society of Chemical Industry  相似文献   

A screening test for Mycosphaerella brassicicola on Brassica oleracea     

J. E. Van Den Ende 《European journal of plant pathology / European Foundation for Plant Pathology》1992,98(4):227-236

A greenhouse screening method for resistance to ringspot (Mycosphaerella brassicicola) inBrassica oleracea is described. High infection levels were achieved by spraying young plants by mycelial inoculum enriched with 3% sucrose. The screening method was tested on three Brussels sprouts, three cabbage and three cauliflower cultivars, with known reactions to ringspot in the field. Resistance was expressed both in cotyledons and true leaves by a lower number of lesions than the susceptible control and/or by hypersensitive reactions. Results of the seedling tests reflected differences in resistance in the field. Under controlled conditions the new test can be applied year-round to young plants, thus accelerating selection procedures.  相似文献   

浅议科学学派中领袖的作用与学派风格     

刘永福  李国春 《云南农业大学学报(自然科学版)》2008,(6)

科学学派是19世纪大学里普遍开展科学研究并建立起现代实验室后出现的一种科学组织形式。以科学史上著名的布鲁塞尔学派和哥本哈根学派为例,借助科学社会学的研究方法,分析这两个学派的学派领袖所具有的独特学术魅力和素养,并对在此基础上形成的学派风格和开创的学派领域加以考察,进而揭示科学学派领袖的个人作用与学派风格之间的密切关系,并对我国科学学派的培育提出一定建议。  相似文献   

Potential long-term growth gains from early clump thinning of coppice-regenerated oak stands     

Kim E. Lowell  Harold E. Garrett  Robert J. Mitchell 《New Forests》1989,3(1):11-19

A study was established in the Missouri Ozarks to evaluate coppice regeneration of oak. Five years after a 32-year-old stand was clearcut and regenerated naturally through stump sprouts, the dominant sprout on each stump was identified based upon height. Treated plots were thinned to the single dominant sprout on each stump whereas control plots were not thinned. Twenty-five years later the largest 247, 371, 494, and 618 stems per ha were examined and height of the dominant sprout at age 5 was found to be strongly related to dbh at age 30 in both thinned and unthinned plots. However, in the thinned plots, the largest 494 stems per ha were on average 11%, 28%, and 58% greater, respectively, in height, dbh, and volume compared to similar dominant sprouts in unthinned plots. Logistic regression analysis was used to develop curves for the evaluation of potential gains from clump thinning. In this analysis, the average height of a stand at age 5 was used to estimate thinning gains at age 30.  相似文献   

Biomass equations for seven different tree species growing in coppice-with-standards forests in Central Germany     

Katja Albert  Peter Annighöfer  Jens Schumacher  Christian Ammer 《Scandinavian Journal of Forest Research》2014,29(3):210-221

With an increasing demand of sustainable raw materials for bioenergy use, coppicing as management approach to increase the biomass production of forests is becoming of greater importance. This study describes the parameterization of biomass equations for six tree species traditionally used in coppices forests, namely sycamore maple (Acer pseudoplatanus L.), field maple (Acer campestre L.), European ash (Fraxinus excelsior L.), European hornbeam (Carpinus betulus L.), downy birch (Betula pubescens Ehrh.), and common hazel (Corylus avellana L.) growing in coppice-with-standard systems in Lower Saxony, Germany. The parameterization was based on measurements of over 950 trees sampled from two forest sites. The sampled trees were felled and separated into three biomass compartments (stem, coarse branches, and fine brushwood) and weighed on site. The dry weight of sub samples from each compartment was measured. Equations were derived for total aboveground biomass, stem biomass, and crown biomass using regression analyses. We either used diameter at breast height as single independent explanatory variable or in combination with tree height. Biomass production of stump sprouts and generatively grown stems was compared for ash and sycamore maple. In the same age classes, it was found that ash stump sprouts had a slightly higher production than seed-grown stems. For sycamore maple, no difference was detected.  相似文献   

Effect of glucose on glucosinolates,antioxidants and metabolic enzymes in Brassica sprouts     

Jia Wei  Huiying Miao  Qiaomei Wang 《Scientia Horticulturae》2011

The purpose of this study was to investigate the effect of glucose on glucosinolates, antioxidants and metabolic enzymes in Brassica sprouts. After glucose treatment, total glucosinolates, phenolics and anthocyanin contents and antioxidant activity were significantly enhanced in Chinese kale and pak choi sprouts, while only the anthocyanin and ascorbic acid contents were increased in radish sprouts. These results indicate that glucose treatment has selectively improved the nutritional compounds in different Brassica sprouts.  相似文献   

天然提取物对珙桐茎诱导愈伤组织的影响     

董社琴  李冰雯 《安徽农业科学》2007,35(29):9176-9177

[目的]筛选诱导珙桐茎愈伤组织的最佳培养基,为建立悬浮细胞系以及大规模繁殖珙桐提供前期技术基础。[方法]采集5年生以下珙桐的嫩枝条幼嫩茎为外植体,环割后接种在改良MS培养基上,培养基设25个处理,分别添加浓度为0、0.1、0.2、0.3、0.4 mg/L的NAA,浓度为0、10、20、30、40 mg/L的豆芽汁和浓度为0、5、10、15、20 mg/L的番茄汁。[结果]天然提取物和植物生长调节剂对珙桐茎诱导愈伤组织都有影响,其影响程度是NAA>豆芽汁>番茄汁。改良MS培养基添加30 mg/L豆芽汁+20 mg/L番茄汁+0.4 mg/LNAA是诱导珙桐茎愈伤组织的最佳培养基,诱导出的愈伤组织质量好,出愈率高达98%。[结论]添加天然提取物可诱导出质量好的珙桐茎愈伤组织,这与豆芽汁和番茄汁含有丰富的维生素B和维生素C有关。  相似文献   

The role of pollen and stigma in determining the level of partial self-compatibility in brussels sprouts     

T. Hodgkin 《Euphytica》1977,26(2):401-408

Summary Brussels sprouts inbred plants, homozygous for the same recessive S-allele, were intercrossed in all combinations and the number of pollen tubes penetrating the stigmas of such crosses measured. The results of five such experiments showed that pollen as well as stigma is significant in determining the number of pollen tubes counted. It was also found that the capacity of a plant's stigmas to permit pollen tube penetration was independent of the capacity of its pollen to penetrate other plants' stigmas. Variation in pollen tube production between pollens of the plants tested was often greater than that between their stigmas.  相似文献   

The use of seed acid phosphatases in the determination of the purity of F1 hybrid brussels sprout seed     

S. Woods  D. A. Thurman 《Euphytica》1976,25(1):707-712

Summary Starch gel electrophoresis of single seeds of five different F₁ hybrids of Brussels sprouts showed that they possessed three cathodal acid phosphatases. By comparison with cathodal acid phosphatases present in their inbred parents these have been interpreted as the two parental types plus a hybrid enzyme. All of the parental material could be classified into two groups depending upon whether or not their cathodal acid phosphatase was fast or slow moving. It was shown that these acid phosphatases are suitable for the determination of sibs in F₁ hybrid sprout seed provided that one of the parents possesses the slow moving cathodal acid phosphatase and the other the fast moving one. A survey of 35 different F₁ hybrids showed that 18 could be analysed for sibs using this method, those which could not were assumed to have had parents who possessed cathodal acid phosphatases of the same mobilities.  相似文献