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低能离子注入对紫花苜蓿种子发芽及幼苗生理生化变化的影响 总被引:14,自引:0,他引:14
以紫花苜蓿新疆大叶苜蓿和陇东苜蓿为材料,研究不同剂量N 离子注入后对种子发芽及幼苗生理生化变化的影响.结果表明,注入剂量为6×1016N /cm2能提高两个品种种子的发芽势和发芽率,并且两个品种种子存活率剂量效应曲线呈"马鞍型".通过对发芽率的方差分析,得出N 离子注入后,品种间和剂量间差异显著,而品种与剂量互作效应间差异未达显著水平.同时不同剂量离子注入可不同程度提高过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)活性.说明适宜N 离子注入可提高紫花苗蓿种子的活力,促进种子萌发和幼苗生长. 相似文献
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为明确小麦光腥黑粉菌侵染小麦后对小麦茎、叶、穗部防御酶活性的影响,本研究以高感小麦光腥黑穗病品种‘东选3号’和高抗小麦矮腥黑穗病品种‘伊农18/兰考矮早8号’为供试材料,测定小麦被光腥黑粉菌侵染0~6 d后,小麦的过氧化氢酶(CAT)、过氧化物酶(POD)和超氧歧化物酶(SOD)的活性变化。研究表明,两个小麦品种的防御酶活性均显著升高,除感病品种叶片CAT活性的升高幅度高于抗病品种外,抗病品种小麦茎和穗部POD和SOD活性均高于感病品种,且抗病品种的酶活性持续时间长,变化幅度较平缓。接菌后两个品种叶片的防御酶活性均高于茎和穗部,而穗部的CAT和POD活性出现酶活性高峰的时间最早。三种防御酶均与小麦抗病性有一定的相关性,本研究可为小麦光腥黑穗病的抗性育种工作提供理论依据。 相似文献
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时丽冉崔兴国李会芬等 《作物杂志》2014,(1):73-75
用不同浓度NaCl(0、80、150、250mmol/L)处理小黑麦三叶期幼苗,测定处理1、3、5、7d时的叶片中超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性的动态变化规律。结果显示:用80mmol/L NaCl处理后,小黑麦幼苗叶片中3种抗氧化酶活性均随着处理时间的延长而升高,在NaCl浓度为150mmol/L和250mmol/L时酶活性先上升,在3d或5d时达最大值,之后酶活性下降,但仍高于对照。表明小黑麦有较强的抗盐能力。 相似文献
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采用垂直板聚丙烯酰胺凝胶电泳技术,研究N+离子注入处理后小麦种子豫麦34萌发时期根、盾片、芽、胚乳中POD和SOD同工酶的变化.结果表明:N+离子注入可引起豫麦34的不同器官中POD和SOD同工酶的酶带与酶活性的不同变化,除芽中POD和SOD同工酶活性无明显变化外,其它器官中POD和SOD同工酶均表现为活性增强.4种器官相比,根和胚乳中同工酶变化较大,盾片和芽中同工酶变化不明显.其中,根中同工酶变化更为显著,N+离子束注入处理后根中POD同工酶多了Rf值为0.47的新酶带. 相似文献
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玉米与矮花叶病毒互作对防御反应酶系活性的影响 总被引:4,自引:0,他引:4
选取抗、感甘蔗花叶病毒-玉米矮化株系的玉米自交系黄早四和Mo 17,与国内流行的甘蔗花叶病毒-玉米矮化B株系组成的非亲合性和亲合性互作体系为研究对象,以未接种为对照,对两类互作类型的防御反应酶系中的苯丙氨酸解氨酶(PAL)、过氧化物酶(POD)、多酚氧化酶(PPO)、过氧化氢酶(CAT)和超氧化物岐化酶(SOD)活性变化规律进行系统研究.非亲合性互作中PAL活性始终高于对照,整个互作过程中形成两个较大的峰,亲合性互作中除96 h高于对照外,其它时间均比对照低;非亲合性互作中POD活性先升后降,形成1个明显的峰值,亲合性互作中POD活性与对照相比没有明显变化,144 h形成1个明显酶活高峰;非亲合性互作体系中多元酚氧化酶除24 h外,酶活性均高于对照,形成1个酶活高峰,亲合性互作中酶活与对照相比没有较大变化;非亲合性互作中CAT活性始终低于对照,亲合性互作中在接种24~120 h内形成两个酶活高峰均高于对照;非亲合性互作中SOD活性先降后升,72 h达到酶活高峰,亲合性互作中变化趋势与非亲合性互作相似,酶活高峰出现在120 h. 相似文献
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Ar+离子注入对紫花苜蓿发芽、生长及幼苗脂质过氧化的影响 总被引:8,自引:0,他引:8
本文研究不同剂量的Ar 注入紫花苜蓿后对种子发芽、生长及幼苗脂质过氧化的影响,并观察其随萌发天数的变化趋势.结果表明,离子注入对种子发芽率(势)、根长及有丝分裂指数的影响呈独特的"马鞍型"剂量效应曲线,即在一定的剂量范围能提高种子的发芽率(势)、根长,和有丝分裂指数.超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性随萌发天数增加而逐渐升高,注入剂量为6×1016 Ar / cm2时,三种酶的活性最高.过氧化物酶同功酶酶谱显示:各剂量下幼苗POD同功酶谱带数量没有变化,而仅表现为酶活性的变化. 相似文献
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孩儿拳种子萌发特性和抗氧化系统对盐胁迫的响应 总被引:1,自引:0,他引:1
用不同浓度的NaCl溶液对孩儿拳种子进行胁迫处理,探讨盐胁迫下孩儿拳种子萌发特性、保护酶和膜质过氧化吵度.结果表明:(1)低浓度盐胁迫(50mmol/L)下,种子总萌发率与对照差异不显著,幼根长度和幼苗鲜重却高于对照,随着盐胁迫的加重,种子萌发率、幼根长度和幼苗鲜重均呈下降趋势.盐浓度为200 mmol/L时,总萌发率仅为13.8%.(2)在盐胁迫浓度较低时,SOD酶活性显著高于对照,当盐胁迫浓度达到200 mmol/L时,SOD活性开始下降;CAT酶活性随着盐胁迫浓度的增加,变化趋势和SOD酶活性相似;POD酶活性随着盐胁迫的增加呈升高趋势,尤其在SOD酶活性开始下降时,POD酶活性仍在增加.(3)盐胁迫为50 mmol/L和100 mmol/时,其丙二醛含量与对照差异不显著,盐胁迫为200 mmol/L时,丙二醛含量最高,为对照的2.35倍. 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献