渗透调节

The above results indicate that exogenous Putrescine could improve osmotic adjustment ability of winter wheat seedling leaves under drought stress and increase drought tolerance of plant.

这说明外源腐胺能改善冬小麦幼苗叶片干旱胁迫下的渗透调节能力，从而增强植株的耐旱性。

Under salt stress, the growth, osmotic potential, chlorophyll fluorescence parameters, Na(superscript +) and K(superscript +) uptakes and transports in the seedlings of two Ricinus communis varieties (cultivar castor Zibi 6 and wild castor which grew naturally in coastal saline-alkali land) were comparatively studied.

方法］比较了栽培蓖麻淄蓖6号和天然生长于滨海盐碱地的野生蓖麻体内K、Na的分布特点、叶绿素荧光参数、植株生长状况和叶片渗透调节能力对NaCl处理的响应。

Taxus chinensis var.mairei ; semilethal temperature ; osmoregulation substance ; cold resistance

南方红豆杉；半致死温度；渗透调节物质；抗寒适应性

S.glabra Nakai ; semilethal temperature ; osmoregulation substance ; cold resistance

草珊瑚；半致死温度；渗透调节物；抗寒适应性

In the present study, the effect of salinity on the germination for euhalophyte and xerophyte, and the strategies for adaptation of halophytes to extreme saline and arid environments in Xinjiang during seed germination stage were investigated;the osmotic adjustment traits of euhalophyte and xerophyte were also investigated in field and controlled conditions.

本文研究了盐分对真盐生植物和旱生植物种子萌发的影响以及盐生植物种子萌发阶段适应新疆极端盐渍和干旱环境的策略；在野外和室内条件下对真盐生植物和旱生植物渗透调节特性进行了比较研究。

Pereme , separately are 209%,295%,285%; the increasing of accumulating amount separately are 209%,295%,285%; The use of silicon has a tread to rise dry weight of Bermudagrass ,Agrostis Lolium. Pereme ; Under the drought condition , the use of silicon suppressed the reducing of the relative water content of leaf in turfgrass , delaying the time of wither , stress for the 11th day in the drought .compared with water normally and not using silicon ,after use silicon, the RWC of Bermudagrass , Agrostis Lolium. Pereme only separately depressed 14%,16%,32%; Under the drought condition ,the use of silicon can increased the content of proline of Bermudagrass ,Agrostis Lolium. Pereme, stress for the 11th day in the drought and using silicon , compared with water normally and ueing silicon, the content of Pro separately increased 203%,199%,473%;The using of silicon depressing the ET of Bermudagrass and Lolium. Pereme.Under water normally condition, separately depressed 21%,8% at eleven days ;Under drought condition , separately depressed 17%,5%.

施硅增加了草坪草狗牙根、剪股颖和黑麦草的含硅量，分别为209％、295％、285％；积累量分别提高了240％、364％、355％；施硅对草坪草狗牙根、剪股颖和黑麦草的干物质积累有促进趋势；在干旱的条件下，施硅抑制了草坪草的叶相对含水量的降低，延迟了叶片萎焉的时间，在干旱胁华中农业大学2001级时一艳丽硕士学位论文迫第n天，与正CK相比，施硅后狗牙根、剪股颖和黑麦草分别只降低了 14%；16%，32%。；施硅增加了狗牙根、剪股颖、黑麦草在干旱条件下脯氨酸的含量，增强了渗透调节能力，在干旱施硅的条件下，与正51相比，在干旱胁迫第11天，狗牙根、剪股颖和黑麦草脯氨酸的含量分别增加了2叨%、199%、473%；施硅减少了狗牙根和黑麦草的蒸散量在正常浇水的条件下，与正CK相比，第11天狗牙根和黑麦草的蒸散量分别降低了21%、吕%；在干旱的条件下，与干CK相比，在干旱胁迫的第11天，狗牙根和黑麦草的蒸散量分别降低了17%、5%。

2Under salt stress, the osmoregulation system, membrane system andphotosynthetic system of Arrhenatherum elatius L. were damaged. The materials ofstrong salt-tolerance have high levels of proline content, sugar content, K~+/Na~+ content,MDA content,CAT acitivy and photosynthesis rate etc..

2供试材料盐胁迫下的生理生理特性研究表明：盐胁迫下高燕麦草的渗透调节系统，膜系统及光合系统均受到不同程度的损害，耐盐能力较强的材料ZXY03-367、ZXY03-200等在脯氨酸含量、可溶性糖含量、钾钠含量比、叶片相对含水量、丙二醛含量、CAT活性、光合速率及叶绿素含量方面均高于不耐盐的材料ZXY03-13、ZXY03-443等。

Many vegetal cells accumulate a great deal of betaine under stress conditions, especially Chenopodiaceae and Gramineae, improving cell osmoregulation ability and stabilizing structure and function of intra-cellular macromolecule protein and biomembrane.

在盐分胁迫下，许多植物特别是黎科和禾本科植物细胞中大量积累甜菜碱，可提高细胞渗透调节能力，稳定细胞内大分子蛋白质和生物膜的结构与功能。

The ability of maintaining turgor pressure, osmotic adjustment,capable of preserving and endurance of water separation capability were increased under elevated CO_2 concentrations,whereas the resistance of water separation capability decreased.Theε~max increased in normal water condition of Acer truncatum under 720μmol·mol~(-1)CO_2,and cytoderm more hardness and less elasticity.But in circle 3,ε~ decreased in light and middle drought conditions and increased in serious drought condition.(5) The branch 0,branch 1 and branch 2 of hydraulic conductivity of 7 trees increased along elevated CO_2 concentration.

随着CO_2浓度的增加，RWC~0/RWC_s下降，Ψ~0π和Ψ~(100)π在循环1时先增加后下降，一直持续到循环3，高CO_2浓度下元宝枫维持膨压的能力增强，渗透调节和自身保护能力，以及忍耐脱水能力虽然增加，但是抗脱水能力却减弱了，不能同时兼得。720μmol·mol~(-1)CO_2元宝枫ε~在水分条件较好时增加，细胞壁较坚硬，弹性小，但是到循环3时，ε~在轻度干旱和中度干旱时下降，到后期水分严重胁迫时却升高。

The comprehensive evalucation resulted in a strong drought resistance group including ZXY04P-201、ZXY03P-227、ZXY03P-122 and ZX Y04P-136, a weak drought resistance group including ZXY04P-101、ZXY04P-89,ZXY04P-239 and a intermediate group including the others according to the the above indicators. 3. The results of study on drought mechanism for 4 Dactylis glomerata L. under continuously water stress and rewatering show: the water saturation deficit of leaves arose hastily, and ZXY04P-239 changed most obviously while ZXY04P-201 changed only slightly under drought stress. ZXY03P-173 and ZXY04P-201 increased in the relative plasmalemma permeability and the soluble sugar content while thant of ZXY04P-75 and ZXY04P-239 showed the trend of initial increasing, reaching the peak at the 8th day, then decreasing under drought stress.

20份鸭茅种质幼苗期抗旱性研究表明，干旱胁迫条件下，所有材料的株高、生物量显著下降，叶片脯氨酸和可溶性糖作为重要的渗透调节物质，其含量迅速增加，质膜相对透性的数值变大，细胞膜受伤害程度增大，水分饱和亏缺值变大，植物保水能力变弱，胞间CO2浓度增大；净光合速率、蒸腾速率、气孔导度和叶绿素含量等指标测定值减小，通过20份鸭茅种质苗期抗旱性综合评价，发现ZXY04P-201、ZXY03P-227、ZXY03P-122、ZXY04P-136属强抗旱性材料，ZXY04P-101、ZXY04P-89、ZXY04P-239属弱抗旱性材料，其他属于中等抗旱性材料。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了