胁迫地

The result showed that the biomass of root, stem and leaves of Quercus virginiana were reduced with the increase of salinity and the decline of dry weight of stem and leaves was greater than that of root, which indicated that the aboveground of live oak was more sensitive to salt than the underground which lead to the increase of root-shoot ratio.

结果发现，在经过不同质量质量浓度NaCl处理21d后，随着NaCl质量质量浓度的增加，弗栎植株生长受到抑制，其中茎叶生物量减少的幅度较根系大，表明弗栎地上部生长比地下部对盐胁迫更加敏感，从而导致根冠比增加。

In Panicum repens grown naturally in water marsh, the content of 39.1,68.5 and 130 kD polypeptides was high, and under NaCl stress, the three proteins decreased somewhat, but the 30.6 kD polypeptide was enhanced along with salinity increase. The 30.6 kD protein may be related to salt acclimation of Panicum repens.

移栽后的植株在50 ～400 mmol/L NaCl胁迫下，原生长于海滩的铺地黍中30.6、73.5和96.5 kD蛋白质的含量随盐度的增加而增加；原生长于水湿地的铺地黍中39.1、68.5 和130 kD蛋白质的合成降低，但30.6 kD的蛋白质被诱导合成。30.6 kD的蛋白质可能与铺地黍的盐适应过程有关。

In the low B condition of the soilless culture, rapeseed seedlings were short of B, the seedlings were short and the leaves were malformed and the weight of the shoots decreased, the branch roots were fewer and snuff color, the weight of roots decreased, and the length of root and the ratio of shoot/root decreased, too. However, the high B- efficiency type of rapeseed had the a great ability to the low B stress, the growth of shoots and roots were better than the low efficiency, and the B concentration range of the rapeseed varieties which responded to the B scarce was 0.001 mg/L to 0.01 mg/L.

营养液培养条件下，苗期缺硼，甘蓝型油菜植株瘦小，叶片皱缩，地上部生长量下降；侧根少且呈现黄褐色，根重、根体积、根长以及根冠比下降；高效品种具有较强的耐低硼胁迫的能力，表现为同等缺硼条件下，对高效品种地上部和根系生长的抑制作用都相对较小，且品种间对缺硼反应差异最大的硼浓度范围为0.001mg／L—0.01mg／L。

Either in the un-drought or drought plots with various gradients of species richness, both survival competition ability and growth competition ability of Sida rhombifolia, Mosla dianthera and Cassia mimosoides were the lowest.

以物种生物量百分率增加值代表物种生长特征竞争能力，干旱胁迫和正常对照样地内物种生物量百分率增加值之间不存在显著相关性，生长特征竞争等级明显改变，说明干旱胁迫对物种生长特征的竞争等级有明显的影响作用。

Overall, in responses of plant plasma membranes to stresses, adaptive responses were usually observed under gradual stresses, whereas excitive responses usually happened under abrupt experimental stresses.

总之，与实验室人为短期而剧烈的胁迫下植物发生的应激性反应不同，在缓慢胁迫下，植物细胞质膜的响应更多地表现为适应性反应。

The increscent of species biomass percentage, which is used to present the competitive ability of species growth, was not significantly correlated between un-drought plots and drought plots. This means that drought stress has significant effect on the competitive hierarchies of species growth characteristic.

以消亡百分率代表物种存活特征竞争能力，干旱胁迫和正常对照样地内物种消亡百分率之间存在显著正相关，存活特征的竞争等级未发生明显的变化，说明干旱胁迫对物种存活特征的竞争等级的影响作用较弱。

Membrane permeability, malondialdehyde contents and activities of antioxidant enzymes in Kochia prostrata seedlings were studied under different concentrations of salt stress. The result showed that the membrane permeability and MDA contents increased with the increasing of salt concentrations.

通过不同浓度的盐胁迫对木地肤Kochia prostrata幼苗细胞膜透性、丙二醛和3种保护酶活性的测定，获得以下结果：随着盐浓度的增加和胁迫时间的延长，幼苗叶片的细胞膜透性呈递增趋势，且浓度≥150mmol/L时，细胞膜透性与对照有极显著差异(P.01)。

Along with seawater stress strength upward, the ratio of root to shoot, Na+, Cl- and soluble sugar contents were increased significantly. Under the 10% and 20% seawater treatments, chlorophyll contents have no obvious difference compared with the control, but significantly decreased when the seawater stress further increased. Under the 10% seawater treatments, K+ contents in the shoot and root of Lactuca indica seedlings have no distinct difference compared with the control, but along with seawater stress strength upward, K+ content were markedly decreased by degrees. However, soluble protein content first increased then decreased with seawater concentration augment.

结果表明：苦荬菜幼苗地上部受海水胁迫较为显著，而根在30%海水以内与对照相比没有显著差异；根冠比随着海水比例的增加而提高；10%和20%海水处理下，叶绿素含量与对照相比差异不显著，但随着海水浓度的进一步增加，叶绿素含量显著下降；10%海水处理下，苦荬菜地上部分及根K+含量与对照差异不显著，高于10%海水处理，K+含量随海水比例的增加地上部和根部均逐渐显著降低；海水处理下，体内Na+和Cl-含量逐渐显著增加；地上部可溶性糖逐渐显著增加，而可溶性蛋白呈先升后降。

Simulated regression analysis showed that the exponential increase of MDA content, plasmamembrane permeability, auto-oxidation rate of the organ and O2 produc-tion rate and parabolic decrease of SOD activity and GSH content as well as the logarithmic decrease of CAT activity in the stressed leaves were found with the decrease of soil water content....

经回归模拟显示，蔗叶MDA含量、质膜差别透性、O_2产生速率和组织自动氧化速率均随土壤含水量的降低呈指数增加，SOD活性和GSH含量呈抛物线变化，而CAT活性呈对数降低；逐步回归分析定量地指出了水分胁迫下蔗叶SOD和CAT在清除活性氧、防止膜脂过氧化和质膜破坏中的协同作用关系，且受O_2产生的影响；经卡方测验证实，该回归模型各参数与大田干旱胁迫的实际结果相符。

The result showed there existed significant differences among families in seedling growth, dry matter accumulation, leaf shape as well as root parameters at high and low nitrogen levels. Remarkable reduction in seedling height, dry matter accumulation, leaf and root parameters were observed under low nitrogen stress, whereas larger proportion of photosynthesis production was allocated into roots to promote nitrogen absorption. Family variation in seeding growth, leaf and root parameters were increased under low nitrogen stress in comparison with high nitrogen level, which would be benefit to discriminate superior L. chinense families with high nitrogen efficiency. Nitrogen efficiency of different L.

结果表明：不同氮素水平下，马褂木苗的生长、干物质积累、叶片和根系等性状皆存在显著的家系遗传差异；低氮胁迫将显著抑制马褂木苗叶片发育和根系生长，影响苗高生长和干物质积累，但低氮素水平下生产的光合产物则较多地分配至地下根系部分以促进对氮素的吸收利用；与高氮处理比较，低氮胁迫加大了苗木生长、叶片和根系参数等家系遗传分化，有利于鉴别高氮效率的马褂木优良家系。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。