胁迫的

The results indicated that the content of MDA and root-shoot ratio were increased, but the dry weight of root, total root length, secondary root number, root activity, the SOD activity of root, the height of plant and aboveground dry weight of broomcorn millet decreased significantly with drought treatment regardless of fertilizing or not.

不同施肥水平下黍子根系对干旱胁迫的生物学响应研究表明，无论施肥与否，拔节期或抽穗期干旱胁迫均会使黍子根重、根长、根活力、次生根数、根系SOD活性及株高与地上部干重明显降低，MDA含量明显增高；水分胁迫解除后，黍子根系增长迅速，表现出明显的补偿效应和根系对水分反应敏感的特点，但干旱造成的不利影响在后期未能完全补偿。

The effect of Profenofos on GPx activities and on the co ntents of GSH and CAR in Phaeodactylum tricornutum and Platymonas helgolan dica were studied. The results indicate that the GPx activities of two species of microalgae declined, and the contents of glutathione and carotinoid of algal c ells decreased under high concentration of Profenofos.

摘 要 实验以三角褐指藻和青岛大扁藻为材料，进行了丙溴磷农药对海洋微藻的抗氧化防御系统成份— GPx 活性和GSH、CAR含量的影响研究，结果表明，在丙溴磷胁迫下，微藻的GPx活性呈现下降趋势，GSH和CAR含量也表现为下降趋势，并且胁迫的时间越长、胁迫的强度越大它们下降的幅度也越大。

The photosynthetic rate decreasing of un-pretreated was not caused by plant spiracle.Thephotosynthetic rate decreasing of the pretreated plant was caused by plant spiracle in the first andsecond low temperature stress day,The photosynthetic rate decreasing of the pretreated plant wascaused by other factors in the third and fourth day.

在胁迫过程对照植株光合速率的下降是由非气孔因素引起；锻炼植株光合速率的下降在胁迫的前两天是由气孔因素引起，在胁迫的第三和第四天是由非气孔因素引起。

Amygdalus pedunculata seedlings were treated with PEG-6000 solutions of different concentrations to imitate drought stress.The changes of relative water content and the membrane lipid peroxidation of leaves were studied.

利用PEG-6000根际模拟土壤水分胁迫的方法，对长柄扁桃幼苗进行了不同程度的水分胁迫处理，研究在不同水分胁迫下长柄扁桃叶片相对含水量及膜脂过氧化作用的变化。

Plasma membrane infolding occurred after pretreatment and low temperature stress, one new structure looked like vacuole was recognized between plasma membrane and cytoderm, the emergence of that phenomena maybe concern with plasma membrane infolding and vacuole.

在胁迫过程对照植株光合速率的下降是由非气孔因素引起；锻炼植株光合速率的下降在胁迫的前两天是由气孔因素引起，在胁迫的第三和第四天是由非气孔因素引起。这也从另一个角度证明了低温锻炼提高了植物的抗寒性。

The results showed that germinative energy was more sensitive to alkaline stress than germination rate,RL was more sensitive to alkaline stress than SH and RN,early seedling stage was more sensitive to alkaline stress than germination period.

结果表明，水稻发芽势对碱胁迫的反应较发芽率更为敏感；根长对碱胁迫的反应较苗高和根数更为敏感；幼苗前期对碱胁迫的反应较发芽期更为敏感。

Involucrate seedlings. The results showed that all test reagents had positive effects, and synergistic effect existed among them. CaCl2 and SA improved the water utilization efficiency of D. involucrate at the initial stage of water stress, while water-retention agent maintained higher soil moisture content when the drought stress developed so as to improve the drought resistance of D. involucrate and alleviate the effects of water stress.

结果表明：CaCl2、SA和保水剂对珙桐幼苗抗旱性的影响均呈正向作用，且它们之间具有协同效应；CaCl2和SA提高了珙桐幼苗在水分胁迫前期对土壤水分的利用，使幼苗维持了较高的抗旱性；随着土壤干旱的持续，保水剂对水分胁迫有缓效作用，使土壤维持了较高的水分含量，有利于保持幼苗的抗旱性，减小水分胁迫的危害。

Drought stress weakened the rhizosphere effect of ammonifying bacteria.Under drought stress,rhizospheric ammonifying bacterium amount of Baidan31 was very significantly different at seedling and jointing,and significantly different at tasseling-anthesis from that of control.Rhizospheric nitrifying bacteria tended to increase under drought stress.

干旱胁迫减弱了玉米氨化细菌的根际效应，与对照根际氨化细菌数量相比，白单31在苗期和拔节期根际氨化细菌数量受干旱胁迫的影响达极显著水平，在抽雄～开花期达显著水平；根际硝化细菌数量在干旱胁迫下有所增加。

In this study, by applying technology of plant physiology and biochemistry, combined with proteomics technology we analyzed effect of the low temperature stress on the physiological and biochemical responses on 4 week-old buffalograss treated at 5℃for 6 h and 24 h, and carried out the analysis of differential proteomics on leaf total protein under 5℃for 24 h. The aim of this study is to explore the mechanism of cold resistance on buffalograss.

本研究利用植物生理生化的研究手段，并结合蛋白质组学研究技术(双向电泳技术、质谱技术)，分析了在5℃低温胁迫6 h和24 h的条件下，野牛草生理生化的响应机制；对低温胁迫24 h的野牛草幼苗叶片总蛋白进行了差异蛋白质组的比较分析，以探索野牛草低温胁迫的抗性机制。

In this experiment the seven tea varieties were dealt with the drought in the planting base of Tea Research Institute of Chongqing .The activity of SOD,POD and the quantity of ?OH were mensurated in the tea mature leaf, and the contrastive and dynamic analyse were carried .It is clear that the changers of activity of SOD,POD have a trend of first increase and following decrease in drought stress.

通过对重庆市茶叶研究所基地种植的7个茶叶品种干旱胁迫下叶片中的超氧化物歧化酶酶活性、过氧化物酶酶活性及体内羟自由基含量的对比试验和动态分析，表明SOD和POD在干旱胁迫下，均表现出&先升后降&的变化趋势，茶树体内羟自由基含量则随干旱胁迫的进程而增加。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐