|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 甘蓝型油菜光合机构对干旱的生理响应显示文摘为探讨油菜光合机构对干旱胁迫的响应,研究了2个抗旱性不同的油菜(Brassica napus L.)品种在干旱胁迫下农艺性状、气体交换参数、叶绿素荧光参数、叶绿体超微结构及Rubisco活性等指标的变化。结果表明,干旱胁迫下,相对增长率、总干重、叶面积和叶片相对含水量降低,而根冠比增加;净光合速率、蒸腾速率、气孔导度和胞间CO2浓度降低,而气孔限制值增加;PSⅡ最大光能转换效率、PSⅡ实际光能转换效率、光化学淬灭和电子传递效率降低,而非光化学淬灭系数增加;两品种的叶绿体超微结构遭到不同程度破坏;且叶绿素含量和Rubisco活性降低,脯氨酸和可溶性糖的含量增加。敏感型品种秦优8号光合机构遭受干旱的破坏程度明显大于抗旱型品种Q2。 | 代碌碌 Muhammad Shahbaz Naeem 张春雷 刘哲辉 陈畅 胡超 赵运成 张利艳 刘丽欣 李俊 马霓 | 2016 | 中国油料作物学报2016，38，6： | 6 |
| 2 | 社会和环境因素对二语学习动机的影响——巴基斯坦大学生视角(英文)显示文摘近年来,二语习得和二语学习动机研究虽然受到了研究者和教师的广泛关注,但是在此方面还有很多问题有待研究,特别是对巴基斯坦的此项研究很少。在影响二语习得动机的不同影响因素中,本研究关注的是不同大学(公立和私立)和不同学科专业(文科和理科)对动机的影响。本研究收集了547份大学一年级学生问卷对不同具体情境因素对英语作为二语学习动机的影响进行研究。研究结果显示私立大学学生比公立大学学生学习动机强且成绩更好。公立大学学生有强烈的工具性动机而私立大学学生偏向于二语理想自我倾向。在学科专业方面,学生二语学习动机没有明显差异,但是在两组学生的成绩上差异明显。文科生学习动机取决于他们对英语的态度,而理科生工具性英语学习动机显著。本文还讨论了产生这些动机差异的原因和对英语教师和学习者的启示。 | Muhammad SHAHBAZ 刘永兵 | 2015 | Chinese Journal of Applied Linguistics2015，38，4： | 3 |
| 3 | Mobilization and Acquisition of Sparingly Soluble P-Sources by Brassica Cultivars under P-Starved Environment I. Differential Growth Response,P-Efficiency Characteristics and P-Remobilization显示文摘Phosphorus (P) starvation is highly notorious for limiting plant growth around the globe. To combat P-starvation,plants constantly sense the changes in their environment,and elicit an elegant myriad of plastic responses and rescue strategies to enhance P-solublization and acquisition from bound soil P-forms. Relative growth responses,P-solublization and P-acquisition ability of 14 diverse Brassica cultivars grown with sparingly soluble P-sources (Rock-P (RP) and Ca3(PO4)2 (TCP)) were evaluated in a solution culture experiment. Cultivars showed considerable genetic diversity in terms of biomass accumulation,concentration and contents of P and Ca in shoots and roots,P-stress factor (PSF) and P use efficiency. Cultivars showed variable P-stress tolerance,and cultivars depicting low PSF and high P-efficiency values were better adaptable to P-starvation. In experiment 2,after initial feeding on optimum nutrition for 12 d after transplanting (DAT),class-I (low P-tolerant (Oscar and Con-II)) and class-II (low P-sensitive (Gold Rush and RL-18)) cultivars were exposed to P-free environment for 25 d. All of the cultivars remobilized P from above ground parts to their roots during growth in P-free environment,the magnitude of which was variable in tested cultivars. P-concentrations ([P]s) at 37 DAT were higher in developing compared with developed leaves. Translocation of absorbed P from metabolically inactive to active sites in P-stressed plants may have helped class-I cultivars to establish a better rooting system,which provided a basis for enhanced P-utilization efficiency (PUE) and tolerance against P-stress. By supplying TCP and RP spatially separated from other nutrients in split root study,class-I cultivars were still able to mobilize RP and TCP more efficiently compared with class-II cultivars. To compare the growth behavior under P-stress,cultivars were grown in pots for 41 d after sowing,using a soil low in P (NaHCO3-extractable P = 3.97 mg/kg,Mehlich-III-extractable P = 6.13 mg/kg) with (+P = 60 mg P/kg soil) or without P addition (0P) in study 4. Tested cultivars showed genetic diversity in PUE,P-efficiency (PE),P-efficiency ratio (PER) and PSF. P-stress markedly reduced biomass and plant P contents. Cultivars that produced higher root biomass accumulated higher total P-contents (r = 0.98??),which in turn was related negatively to PSF (r = ?0.95??) and positively to shoot and total biomass. PER and PE showed significant correlations with shoot P-contents and biomass. Cultivars depicting high PUE and PE,and low PSF values showed better growth behavior under low soil P-environment. Systematic analysis and deployment of the plant rescue traits underlying the nutrient acquisition,assimilation,utilization and remobilization under P-starvation will bring more sparingly soluble P into cropping systems and will help to scavenge more P from plant unavailable bound P reserves. | Muhammad Shahbaz Akhtar Yoko Oki Tadashi Adachi | 2009 | Journal of Integrative Plant Biology2009，51，11： | 2 |
| 4 | Mobilization and Acquisition of Sparingly Soluble P-Sources by Brassica Cultivars under P-Starved Environment II. Rhizospheric pH changes,Redesigned Root Architecture and Pi-Uptake Kinetics显示文摘Non-mycorrhizal Brassica does not produce specialized root structures such as cluster or dauciform roots but is an effective user of P compared with other crops. In addition to P-uptake,utilization and remobilization activity,acquisition of orthophosphate (Pi) from extracellular sparingly P-sources or unavailable bound P-forms can be enhanced by biochemical rescue mechanisms such copious H+-efflux and/or carboxylates exudation into rhizosphere by roots via plasmalemma H+ ATPase and anion channels triggered by P-starvation. To visualize the dissolution of sparingly soluble Ca-phosphate (Ca-P),newly formed Ca-P was suspended in agar containing other essential nutrients. With NH4+ applied as the N source,the precipitate dissolved in the root vicinity can be ascribed to rhizosphere acidification,whereas no dissolution occurred with nitrate nutrition. To observe in situ rhizospheric pH changes,images were recorded after embedding the roots in agar containing bromocresol purple as a pH indicator. P-tolerant cultivar showed a greater decrease in pH than the sensitive cultivar in the culture media (the appearance of typical patterns of various colors of pH indicator in the root vicinity),and at stress P-level this acidification was more prominent. In experiment 2,low P-tolerant class-I cultivars (Oscar and Con-II) showed a greater decrease in solution media pH than low P-sensitive class-II (Gold Rush and RL-18) cultivars,and P-contents of the cultivars was inversely related to decrease in culture media pH. To elucidate P-stress-induced remodeling and redesigning in a root architectural system,cultivars were grown in rhizoboxes in experiment 3. The elongation rates of primary roots increased as P-supply increased,but the elongation rates of the branched zones of primary roots decreased. The length of the lateral roots and topological index values increased when cultivars were exposed to a P-stress environment. To elucidate Pi-uptake kinetics,parameters related to P influx:maximal transport rate (Vmax),the Michaelis-Menten constant (Km),and the external concentration when net uptake is zero (Cmin) were tested in experiment 4. Lower Km and Cmin values were better indicative of the P-uptake ability of the class-I cultivars,evidencing their adaptability to P-starved environmental cues. In experiment 5,class-I cultivars exuded two-to threefold more carboxylates than class-II cultivars under the P-stress environment. The amount and types of carboxylates exuded from the roots of P-starved plants differed from those of plants grown under P-sufficient conditions. Nevertheless,the exudation rate of both class-I and class-II cultivars decreased with time,and the highest exudation rate was found after the first 4 h of carboxylates collection. Higher P uptake by class-I cultivars was significantly related to the drop in root medium pH,which can be ascribed to H+-efflux from the roots supplied with sparingly soluble rock-P and Ca3(PO4)2. These classical rescue strategies provided the basis of P-solubilization and acquisition from sparingly soluble P-sources by Brassica cultivars to thrive in a typically stressful environment. | Muhammad Shahbaz Akhtar Yoko Oki Tadashi Adachi | 2009 | Journal of Integrative Plant Biology2009，51，11： | 2 |
| 5 | Does financial develop- ment increase energy consumption?The role of industrialization and urbanization in Tunisia显示文摘 | Muhammad Shahbaz Hooi Hooi Lean | 2012 | Energy Policy2012，，40： | 1 |
| 6 | Role Of Tumour Necrosis Factor In Pathogenesis Of RadicularCyst 显示文摘 | Waqar-ur-Rehman Qureshi Muhammad Idris Shahbaz Ali Khan | 2011 | J Ayub Med Coll Abbottabad2011，23，2： | 1 |
| 7 | Financial Development, Eco- nomics Growth, Income Inequality Nexus : A Case Study of Pak- istan显示文摘 | Muhammad Shahbaz | 2013 | International Journal of Economics and Empirical Re- search2013，1，3： | 1 |
| 8 | Does financial development increase rural-urban income inequality?: Cointegration analysis in the case of Indian economy显示文摘 | Aviral Kumar Tiwari Muhammad Shahbaz Faridul Islam | 2013 | International Journal of Social Economics2013，，2： | 1 |
| 9 | Effect of flats speed on cotton carding显示文摘 | NAWAZ Sh Muhammad SHAHBAZ Babar RAFIQ Muhammad | 1998 | Pakistan Textile Journal1998，，2： | 1 |
| 10 | Effect of flats speed on cotton yarn quality显示文摘 | NAWAZ Sh Muhammad SHAHBAZ Babar AHMAD Saeed | 1998 | Pakistan Textile Journal1998，，2： | 1 |
| 11 | Data Mining Applications in Hydrocar- bon Exploration 显示文摘 | Muhammad Shaheen Muhammad Shahbaz Zahoor ur Rehman | 2011 | Artif Intell Rev2011，35，： | 1 |
| 12 | Does financial development increase energy consumption? The role of industrialization and urbanization in Tunisia显示文摘 | Muhammad Shahbaz Hooi Hooi Lean | 2012 | Energy Policy2012，，40： | 1 |
| 13 | Environmental Kuznets Curve hypothesis in Pakistan: Cointegration and Granger causality显示文摘 | Muhammad Shahbaz Hooi Hooi Lean Muhammad Shahbaz Shabbir | 2012 | Renewable and Sustainable Energy Reviews2012，，5： | 1 |
| 14 | Revisiting the Environment Kuznets Curve in a Global Economy 显示文摘 | Muhammad Shahbaz Ilhan Ozturk Talat Afza Am- jad Ali | 2003 | Renewable and Sustainable Energy Reviews2003，25，： | 1 |
| 15 | Electricity consumptionand economic growth empirical evidence from Pakistan 显示文摘 | MUHAMMAD SHAHBAZ METE FERIDUN | 2012 | Humani- ties Social Sciences and Law2012，46，5： | 1 |
| 16 | The environmental Kuznets curve and the role of coal consumption in India: Cointegration and causality analysis in an open economy显示文摘 | Aviral Kumar Tiwari Muhammad Shahbaz Qazi Muhammad Adnan Hye | 2013 | Renewable and Sustainable Energy Reviews2013，，： | 1 |
| 17 | Direct Foreign Investment and Income Distribution: A Case Study for Pakistan 显示文摘 | Muhammad Shahbaz Naveed Aamir | 2008 | International Research Journal of Finance and Economics2008，21，： | 1 |
| 18 | The effect of urbanization, affluence and trade openness on energy consumption: A time series analysis in Malaysia 显示文摘 | Muhammad Shahbaz Nanthakumar Loganathan Rashid Sbia | 2015 | Renewable and Sustainable Energy Re- views2015，47，7： | 1 |
| 19 | Effect of financial development on agricultural growth in Pakistan显示文摘 | Shahbaz Muhammad Shabbir Muhammad Shahbaz Butt Muhammad Sabihuddin | 2013 | International Journal of Social Economics2013，40，8： | 1 |
| 20 | Effect of plant nutrition on aphid size, prey consumption, and life history characteristics of green lacewing显示文摘植物质量能直接并且间接地影响第三营养的水平。由绿草蜻蛉的所有中间形态的 predation, Chrysoperla carnea (S.)(Neuroptera:Chrysopidae ) 在谷物蚜虫, Rhopalosiphum padi (L.) ,和在改变氮化肥的 Sitobion avenae (F.) 上,层次在实验室条件下面被计算。小麦植物在四个氮化肥层次上被种,蚜虫在这些植物上被喂并且随后作为食物出现了到 C。carnea。10, 30,和 90 的蚜虫密度被提供给绿草蜻蛉的第一,第二,和第三个中间形态幼虫。增加的氮申请改进了植物并且也的氮内容在他们上喂的谷物蚜虫的身体重量。由绿草蜻蛉的蚜虫消费随蚜虫的主人植物的氮内容的增加被减少。由 C 的第一,第二,和第三个中间形态幼虫的蚜虫种类的 Predation。carnea 在与授精的最低的率在植物上饲养的蚜虫上是最高的,建议补偿消费克服减少的生物资源(更低的蚜虫尺寸) 。全部的生物资源由 C 吞食了。所有氮化肥处理上的 carnea 不是统计上不同的。另外,植物营养影响的更重的主人猎物在绿草蜻蛉的生活历史特征上有效果。当在 S 上喂了时,幼虫的持续时间,蛹的重量,蛹的持续时间,肥沃,和男、女的长寿被氮授精的水平显著地影响到蚜虫的主人植物,除了蛹的持续时间。avenae。这研究证明供应到幼虫的猎物的那数量影响猎物消费并且此后绿草蜻蛉的生活历史特征。 | Muhammad A. Aqueel Catherine M. Collins Abu-bakar M. Raza Shahbaz Ahmad Muhammad Tariq Simon R. Leather | 2014 | Insect Science2014，21，1： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员