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IAA

IAA的相关文献在1983年到2022年内共计725篇,主要集中在园艺、农作物、植物学 等领域,其中期刊论文521篇、会议论文5篇、专利文献199篇;相关期刊269种,包括西北植物学报、北方园艺、安徽农业科学等; 相关会议5种,包括中国园艺学会十字花科蔬菜分会第六届学术研讨会、2007年全国植物生长物质研讨会、2006年中国园艺学会观赏园艺专业委员会年会等;IAA的相关文献由1935位作者贡献,包括钱夕刚、胡沛泉、卢学琴等。

IAA—发文量

期刊论文>

论文:521 占比:71.86%

会议论文>

论文:5 占比:0.69%

专利文献>

论文:199 占比:27.45%

总计:725篇

IAA—发文趋势图

IAA

-研究学者

  • 钱夕刚
  • 胡沛泉
  • 卢学琴
  • 张慧
  • 张荻
  • 欧毅
  • 王俊杰
  • 胡尚连
  • 贾举庆
  • 赵海川
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 白洁; 姚拓; 雷杨; 王占军; 王辛有; 苑力晖
    • 摘要: 为探究荒漠草原灌木欧李(Cerasus humilis)根系内生细菌固氮能力和其它特性。采用无氮培养基,从欧李根内分离获得20株内生固氮菌,并结合乙炔还原法测定固氮酶活性,钼锑抗比色法测定溶磷特性,Salkowski法测定分泌植物生长素(Indole acetic acid,IAA)能力,对筛选出固氮酶活性较高的菌株进行16S rDNA序列比对,确定其分类地位。结果表明,分离的内生固氮细菌均具溶磷和分泌IAA能力。所分离菌株固氮酶活性在31.45~424.81 nmol C_(2)H_(4)·h^(-1)·mL^(-1)之间(NS 25最高),解有机磷量在26.62~99.18μg·mL^(-1)之间(YNS 4最高),溶无机磷量在1.10~20.31μg·mL^(-1)之间(WNS 21最高),分泌IAA量在3.86~47.00μg·mL^(-1)之间(NS 22最高)。10株固氮酶活性较高菌株经初步鉴定NS114-1和NS114-2为Bacillus pumilus,NS 25和NS 26为Bacillus paralicheniformis,YNS 1为Brevibacterium frigoritolerans,菌株WNS 21和NNS 15为Bacillus velezensis,NS 8为Paenibacillus catalpae,YNS 6为Cytobacillus firmus,NNS 19为Bacillus sp.。研究分离的内生固氮细菌具有溶磷和分泌IAA的能力,有望通过后续研制微生物菌剂为干旱地区植被恢复与生态重建发挥积极作用。
    • 陆妍吉; 滕菲; 姜姝; 郑垚湘; 严雪燕; 王芳
    • 摘要: 以特基拉芽孢杆菌(Bacillus tequilensis)、阿耶波多氏芽孢杆菌(Bacillus aryabhattai)和“北京新三号”大白菜为试验材料,通过菌株产IAA能力的定性、定量测定和大白菜促生效应测定来验证其产IAA能力和促生功能。结果表明,2种菌株均能产生IAA,对大白菜幼苗的出苗率、株高、叶片数、叶面积、茎粗和主根长均有显著的促进作用,能显著提高大白菜幼苗地上部干质量、地上部鲜质量、地下部干质量和地下部鲜质量,能显著提高土壤中IAA、速效磷、速效钾和矿质氮的含量,能够增加大白菜叶片中叶绿素含量。由此可见,特基拉芽孢杆菌和阿耶波多氏芽孢杆菌对植物生长具有一定的促生功能。
    • Adam A. Semlambo; Frank Sengati; Bakiri Angalia
    • 摘要: In most developing countries, governments attempt to enforce the movement from analogue to digital for all their sectors, from public to private. These technological advancements have been noted to bring necessary and unavoidable changes to businesses and learning environments. Higher learning institutions have adopted various e-learning systems to support learning, research, and publication activities to stay competitive in global academic systems. However, most public higher learning institutions in Tanzania lag behind in the adoption of these systems. Thus, research shows a failure of these institutions in utilising the full benefit that today’s Information and Communication Technology (ICT) can offer in learning environments. Thus, this study examines factors affecting the adoption of such a system in developing countries like Tanzania, taking the Institute of Accountancy Arusha (IAA) as a case study. The study used a mixed methodology where thematic and descriptive analysis was used to analyse both qualitative and quantitative research data. The study population was 187 teaching staff, a sample size of 126 was obtained, and 157 study participants were involved in the study. The study found that factors affecting the adoption of e-learning systems in public higher learning institutions in Tanzania include lack of ICT infrastructure, lack of technical and managerial support and lack of computers and e-learning knowledge among facilitators. Thus, the study recommended investments in adequate and reliable ICT facilities, high intermate speed and bandwidth, and policies that support e-learning and training programs about e-learning knowledge and use. Also, this study recommends the use of the Multi-Factors Adoption Model (MFAM11) for the successful adoption of an e-learning system in public higher learning institutions in Tanzania.
    • 郑秋桦; 李富鑫; 刘广源; 庞彦韬; 黎晓漩; 曾松荣
    • 摘要: 以粤北凡口铅锌矿废弃地优势植物香蒲(Typhaorientalis presl)、苦楝(Melia azedarach)、苎麻(Boehmeria nivea)和蓖麻(Ricinus communis)中分离筛选出的具有抗重金属铅、锌能力的45株内生真菌为研究材料,利用CAS检测液显色反应、钼锑抗比色法和Salkowski法,分别筛选出具有促进植物生长的产铁载体菌株30株、溶磷菌株3株和产吲哚乙酸(IAA)菌株18株。并选取具有产铁载体、溶磷或产IAA能力较强的菌株作为代表菌株进行形态学鉴定和ITS序列分析,鉴定结果显示:WB-21为曲霉属(Aspergillus)、BM3为旋孢腔菌属(Cochliobolus)、BM5为链格孢属(Alternaria)、菌株XP3.21为刺盘孢属(Colletotrichum)、ZMP5-3为篮状菌属(Talaromyces)。
    • 石海燕; 张志刚; 李宏; 杨建军; 李斌; 史开奇; 杨璐
    • 摘要: 幼苗期夏橡在生长发育过程中存在封顶现象,为探究外源植物生长调节剂吲哚乙酸(indole-3-acetic acid,IAA)对封顶现象的破除作用,以1年生夏橡播种苗木为研究对象,在夏橡封顶时喷施不同质量浓度的IAA.通过对夏橡生长特性、光合特性的测定,运用最小显著性差异法(least significant difference,LSD)及沃勒-邓肯对比分析在喷施不同质量浓度IAA后幼苗期夏橡生长特性与叶片光合性能的差异,结果表明:喷施IAA提高了夏橡光合特性日变化指标G_(s)、T r及C_(i),进而提高了植株的净光合速率(P_(n)),低质量浓度IAA处理下幼苗期夏橡P_(n)下午峰值提前,高质量浓度处理后光合“午休”现象消失;IAA处理对于延缓P_(n)下降有一定作用,质量浓度为60 mg/L的IAA处理时P_(n)最大;IAA处理前期主要受气孔限制,后期以非气孔限制为主.得出结论:IAA的喷施会提高夏橡幼苗的P_(n),延缓P_(n)的下降,此外IAA质量浓度为100~120 mg/L时,破除幼苗期夏橡封顶现象效果最显著.
    • 冯晓硕; 雷杰云; 梁喜龙; 栾晓燕; 刘鑫磊; 方淑梅
    • 摘要: 为获得抗(耐)连作障碍的植物根际促生菌(plant growth-promoting rhizobacteria,PGPR),解决连作障碍对大豆的不良影响,从黑龙江大庆市林甸县试验基地采集连作多年的大豆根际土,从中分离筛选具有解磷和固氮的功能的菌株,进行形态学、生理生化指标、16S rDNA分子生物学鉴定,并对菌株的解磷、分泌IAA(3-吲哚乙酸)能力及ACC脱氨酶活性进行测定,对菌株对种子萌发和苗期的促生作用进行研究和分析。结果得到22株PGPR菌株经鉴定分别属于假单胞菌属(Pseudomonas),肠杆菌属(Enterobacter),土壤杆菌属(Agrobacterium),柠檬酸杆菌属(Citrobacter),沙雷氏菌属(Serratia),克雷伯氏菌属(Klebsiella)。菌株的有效溶磷量范围为0.19~17.49 mg·L^(-1);菌株均有固氮能力;菌株的IAA产量范围为17.72~88.21μg·mL^(-1);菌株的ACC脱氨酶活性范围为0.33~0.67 U·mg^(-1)。一株菌株对大豆种子萌发有显著促进作用;两株菌株对大豆苗期促生效果明显。研究结果可为后续PGPR微生物菌肥的研制与开发提供试验基础。
    • Adam Aloyce Semlambo; Didas Malekia Mfoi; Yona Sangula
    • 摘要: All modern computer users need to be concerned about information system security (individuals and organisations). Many businesses established various security structures to protect information system security from harmful occurrences by implementing security procedures, processes, policies, and information system security organisational structures to ensure data security. Despite all the precautions, information security remains a disaster in Tanzania’s learning institutions. The fundamental issue appears to be a lack of awareness of crucial information security factors. Various companies have different security issues due to differences in ICT infrastructure, implementations, and usage. The study focuses on identifying information system security threats and vulnerabilities in public higher learning institutions in Tanzania, particularly the Institute of Accountancy Arusha (IAA). The study involved all employees of IAA, academics, and other supporting staff, which totalled 302, and the sample size was 170. The study utilised a descriptive research design, where the quantitative methodology was used through a five-point Likert scale questionnaire, and found that key factors that affect the security of information systems at IAA include human factors, policy-related issues, work environment and demographic factors. The study proposed regular awareness and training programs;an increase in women’s awareness of information system security;proper policy creation and reviews every 4 years;promote actions that lessen information system security threats and vulnerabilities, and the creation of information system security policy documents independently from ICT policy.
    • 孟楠
    • 摘要: 备受业界瞩目的全球汽车及移动出行领域盛会——德国国际汽车及智慧出行博览会(IAA Mobility)由德国汽车工业协会携手慕尼黑博览集团打造,将于2021年9月7-12日在德国慕尼黑盛大举行。慕尼黑博览集团(Messe München)于今日正式宣布,上海市国际贸易促进委员会(CCPIT Shanghai)为IAA Mobility在中国的独家官方合作伙伴,并指定其直属企业上海市国际展览有限公司为展会在中国的独家代理销售公司。
    • 李娜; 李菲; 李凤鸣; 丛子健
    • 摘要: 通过田间试验,对夏玉米进行基施、喷施黄腐酸处理.基施量为86.63 kg/hm2,喷施量为63 kg/hm2、34.8 kg/hm2、22.8 kg/hm2,浓度分别为6%、3.3%及2.5%.在夏玉米主要生育时期测定叶片的净光合速率、叶绿素相对值含量(SPAD)、吲哚乙酸(IAA)、脱落酸(ABA)等指标.结果表明,在各生育期,经黄腐酸处理后的玉米各生理指标均高于对照(CK)处理.叶面喷施6%浓度黄腐酸处理叶片光合速率及水分利用效率最高,最高值是CK处理的2.5倍,显著提高了叶片中IAA及ABA含量.喷施3次后,喷施高量黄腐酸(FA)增加了40%,喷施低量黄腐酸(FL)增加了70%,基施黄腐酸(FB)增加了27%.对夏玉米施用黄腐酸喷施处理的效果优于基施处理,且叶面喷施黄腐酸的最佳用量为63 kg/hm2.
    • 杜京旗
    • 摘要: 研究不同浓度的IAA和ABA对坝莜3号种子萌发和幼苗生长的影响.结果表明,300μg·g-1 IAA处理的发芽势显著低于200、250μg·g-1 IAA处理;75μg·g-1除外的ABA处理发芽势和发芽指数均显著低于对照.IAA浓度为200μg·g-1时,燕麦的根长和苗长显著小于其他处理;燕麦的根长/苗长随着IAA浓度的增加而减小.25μg·g-1、100μg·g-1 ABA的根长/苗长显著高于其他处理.200μg·g-1、300μg·g-1 IAA处理的根重、根重/苗重显著低于其他处理;75μg·g-1除外的ABA处理对燕麦的根重、根重/苗重无显著影响.燕麦种子萌发和幼苗生长的最适IAA浓度为150μg·g-1;对燕麦种子萌发和幼苗生长抑制作用最大的ABA浓度为100μg·g-1.
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