oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 26 )

2019 ( 206 )

2018 ( 1384 )

2017 ( 1415 )

Custom range...

Search Results: 1 - 10 of 70556 matches for " 罗庆熙 "
All listed articles are free for downloading (OA Articles)
Page 1 /70556
Display every page Item
番茄嫁接苗的苯丙烷代谢及其与对南方根结线虫抗性的关系
梁朋,陈振德,
园艺学报 , 2011,
Abstract:
南方根结线虫对不同砧木嫁接番茄苗活性氧清除系统的影响
梁朋?,陈振德?,
生态学报 , 2012,
Abstract: 采用盆栽人工接种方法,对番茄嫁接苗进行了抗性评价,研究了番茄嫁接苗叶片中抗氧化酶活性和活性氧代谢的动态变化。结果表明,接种南方根结线虫(j2)后,砧木嫁接苗表现为高抗,自根嫁接苗为高感。通过嫁接换根,与自根嫁接苗相比,砧木嫁接苗明显提高了接穗叶片的超氧化物歧化酶(sod)、过氧化物酶(pod)、过氧化氢酶(cat)和抗坏血酸过氧化物酶(apx)活性,降低了超氧阴离子(o2·-)产生速率以及过氧化氢(h2o2)和丙二醛(mda)含量。表明番茄植株体内的活性氧水平和抗氧化酶活性的高低与其抗根结线虫的能力密切相关,较低的活性氧水平和较高的抗氧化酶活性有利于减轻对膜系统的伤害,提高番茄植株的抗根结线虫能力。
热激处理对甘蓝幼苗叶片保护酶活性和膜透性的影响
陈碧华,,张百俊
华北农学报 , 2006, DOI: 10.3321/j.issn:1000-7091.2006.05.002
Abstract: 试验对耐热性不同的2个甘蓝品种的种子进行了热激处理,在苗期测定了热激处理对甘蓝叶片中保护酶活性和膜透性的影响。结果表明,热激处理后,耐热品种叶片中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性的增幅大于不耐热品种,而不耐热品种叶片中丙二醛(MDA)的含量和膜透性的增幅大于耐热品种。
施用硫肥和硒肥对茎瘤芥产量及抗氧化作用的影响
王丽霞?,汤举红?,
西北农林科技大学学报(自然科学版) , 2012,
Abstract: 【目的】了解不同硫、硒肥施用量对茎瘤芥(brassicajunceavar.tumida)干物质量,硫、硒含量及叶片保护酶活性和代谢物质含量的影响,以探明茎瘤芥对硫、硒肥的生理响应机制。【方法】以茎瘤芥“涪杂1号”为供试品种,采用盆栽试验研究了硫(s)(0,50,100mg/kg)、硒(se)(0,1,3mg/kg)不同用量处理组合(s0se0(ck)、s50se1、s50se3、s100se1、s100se3)对茎瘤芥不同部位干物质量和硫、硒积累及叶片抗氧化能力的影响。【结果】与s0se0相比,施用硫、硒肥能明显提高茎瘤芥根、膨大茎和叶片及单株干物质量。施用硫、硒的处理均能明显提高茎瘤芥各部位对硫、硒的吸收与积累,且硫和硒主要积累在茎瘤芥地上部分膨大茎和叶中。施用硫、硒的处理明显提高了各部位的有机硒和无机硒含量,其中膨大茎和叶中的有机硒含量明显高于无机硒;5个处理中,s50se3处理根、膨大茎和叶中的有机硒与无机硒含量均最高。超氧化物歧化酶(sod)活性以s100se1处理最高,谷胱甘肽过氧化酶(gsh-px)活性以s50se3处理最高;而抗坏血酸过氧化酶(apx)和过氧化氢酶(cat)活性随着硫、硒肥用量的增加变化不大。施用硫、硒肥后,茎瘤芥叶片中mda含量较高,抗坏血酸(asa)和过氧化氢(h2o2)含量较低。【结论】施用硫、硒肥能提高茎瘤芥单株干物质量,促进硒的吸收与积累,对sod和gshpx活性及mda含量有明显影响。综合分析认为,50mg/kgs+3mg/kgse是硫、硒肥施用的最佳组合。
Effects of Meloidogyne incognita on scavenging system of reactive oxygen species in tomato seedlings grafted with different rootstocks
南方根结线虫对不同砧木嫁接番茄苗活性氧清除系统的影响

LIANG Peng,CHEN Zhende,LUO Qingxi,
梁朋
,陈振德,

生态学报 , 2012,
Abstract: Root-knot nematodes (Meloidogyne spp.) have a worldwide distribution and are important endoparasitic pathogens of many plant species. In China, they are becoming one of the most serious diseases with the increase of greenhouse vegetable production. Root-knot nematode disease could inhibit growth and development, and decrease yield and quality of vegetables. The major species of root-knot nematode include M. incognita, M.hapla, M. arenaria and M. javanica. M. incognita is widely spread in Shandong province and causes a serious damage to vegetable production. Although physical and chemical approaches have been used to control the disease, they are not always effective and add the cost to tomato production. In addition, the use of chemicals causes severe environmental pollution and the residue in vegetable products may be harmful to human health. Recently, grafting cultivation using resistant rootstock could effectively prevent tomato from this disease. The effect of four resistant rootstocks on root-knot nematode disease, changes of antioxidant enzyme activities and level of reactive oxygen species (ROS) were investigated in grafted tomato seedlings, using 401, Dahong FA-2160, Fenhe518 and Bulusite as rootstocks, oumeiyuan as scion. The tomato seedlings were planted in pots and inoculated with 3000 of 2nd instars of larval M. incognita. The results showed that tomato seedlings grafted with rootstocks were highly resistant and self-rooted grafted seedlings were sensitive to M. incognita. The activities of antioxidant enzymes, such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) in leaves of scion grafted with different rootstocks were significantly increased, and the production rate of superoxide anion radical (O2·-), the contents of malonaldehyde (MDA) and hydrogen peroxide (H2O2) were reduced comparied with own-rooted grafted seedling, which suggested that the infection aggravated the extent of membrane lipid peroxidation in leaves, especially in the leaves of susceptible variety. Rootstock grafting significantly enhanced resistance of tomato seedlings to M. incognita, while the seedlings of own-rooted grafted were easily infected and formed more large nodules. Rootstock grafting increased the activities of antioxidant enzymes, decreased the level of ROS in the leaves of scion. The level of ROS and the activities of antioxidant enzymes are closely related to their ability of resistance to root-knot nematode. Low level of ROS and high activities of antioxidant enzymes were helpful for reducing the damage of root-knot nematode to membrane system and increasing resistance to root-knot nematode. It was concluded that rootstock grafting can improve resistance to M. incognita, reduce the damage of root-knot nematode infection in tomato.
压缩状态下岩石的ⅰ、ⅱ复合型断裂试验
,黎继珍,,于惠珍
岩石工程学报 , 1985,
Abstract: 本文叙述了在压缩荷载作用下,常用的i、ⅱ复合型脆性断裂的几种理论判据与岩石实验观测成果。初步揭示了压缩状态下大理岩和砂岩的初始断裂特性。
热激处理对甘蓝幼苗叶片细胞膜系统热稳定性的影响
陈碧华,,王广印,李贞霞,孙涌栋
华北农学报 , 2007, DOI: 10.7668/hbnxb.2007.05.014
Abstract: 采用二因素(热激温度、热激时间)二次回归正交旋转组合设计,对耐热性不同的2个甘蓝品种的种子进行了热激处理,然后在苗期测定了甘蓝幼叶中细胞膜的电解质渗漏量。结果表明:热激处理后不耐热品种叶片中细胞膜透性的增幅大于耐热品种,热激温度、热激时间二因素与细胞膜热稳定性之间有显著的回归关系,并且回归分析出最优热激处理组合为42℃2.3h。
服含苍术复方煎剂出现阿托品中毒样现象

中国中药杂志 , 2000,
Abstract: 苍术为菊科植物茅苍术Atractylodeslancea(Thunb.)DC.的干燥根茎。属中药芳香化湿类,性味辛、苦、温而无毒。功能燥湿健脾,祛风除湿,为湿困脾胃之专药。临床应用范围较广,内、外湿邪为患[收稿日期] 20000126者均可使用,只要配伍得当,效若桴鼓。本人在临床工作中,常用苍术6至15g配伍其它方药治疗胃脘痛、泄泻、感冒、痹证等病。近年来在使用中有少数患者出现轻、重不同的“阿托品中毒”样现象(其他医师使用中亦有类似....
海洋平台结构风险评估
,
海洋工程 , 1997,
Abstract: 作为结构系统可靠性方法与结构损伤冗余设计的一个合理延伸与综合,结构风险评估与决策技术是近年来得到迅速发展的新方法。本文讨论了海洋平台结构风险评估的理论框架,涉及了结构风险评估的几个基本方面,为进一步进行详细研究确立了一条主线。本文还对导管架式平台的结构风险评估进行了简要讨论。
瑞利-泰勒不稳定性的实验研究及数值模拟
,朱华
科技导报 , 2005,
Abstract: 通过翻转试验对瑞利-泰勒不稳定性(Rayleigh-TaylorInstabilities)引致的湍流混合过程进行实验研究,提出以染料浓度测定法结合数字图像处理技术测量确定混合物前锋的扩散位置和系数,以拉格郎日块体法(LBM)的数值格式和改进的Smagorinsky理论模式对实验过程进行了大涡模拟数值计算,修正了Voropayev用目测法测量的系数,数值模拟的结果与实验测量结果符合较好。
Page 1 /70556
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.