盐生植物

This research was conducted in degraded rangeland at the southwestern edge of the Mu Us sandland, Yanchi county, Ningxia, the soil seedbank features and its relation to vegetation was analyzed using similarity analysis and ordination method, the results show that seeds within soil distribute mainly in 0~5 cm soil layer, less seeds in 6~15 cm soil layer in exclosed and non-exclosed rangeland, for seeds in exclosed soil, species richness and diversity index H are higher, while D is lower, exclosure measure, generally speaking, can increase plant species and amount of vegetation and seeds in soil, some annual plants, mesophytes and halophytes appears in the soil or surface.

以毛乌素沙地西南缘宁夏盐池县的退化草场为研究对象，采用相似性分析和排序方法对封育和未封育草场土壤种子库的特征及其与地上植被间关系进行了研究，结果表明无论封育区还是未封育区，土壤种子库中的种子主要分布于0~5cm的土层，6~15cm土层的种子数很少；封育区土壤种子库的物种丰富度大于未封育区，物种多样性则表现为H 值较大，而D值较小，总体上看封育措施可以提高地上植被和土壤中种子的种类和数量，一些一年生植物、中生植物和盐生植物开始出现在地面或土壤种子库中。

Halophyte A plant that grows in soils with a high concentration of salt, as found in salt marshes or other littoral habitats.

盐生植物：是一种生活在高盐土壤中的植物，经常可以在盐沼或海滨环境中见到。

It is obvious that S.salsa is an obligatory sodium and chloride hyperaccumulating halophyte. 2. Nicotiana tabacum L.

显然，盐地碱蓬是一种专性盐生植物，是一种Na和Cl的超富集植物。

It can be inferred that there was an organization organ peculiarity for SOD in T. halophila in same stage.Studying of zymogram of isoxymes in T. halophila and A. thaliana, the POD isoxymes of T. halophila were unstable and different in special organ, the leaves of T. halophila in different developmental stage produced the same number but the different kinds of zymogram of isoxymes. It inferred that it was the way of halophyte plant that adjusted to the changes of environment. But the POD isoxymes of A. thaliana were stable and similar in special organ, and there were the same bands in different developmental stage.

对盐胁迫下盐芥和拟南芥同工酶谱带的比较可以看出，盐芥的POD同工酶在特定器官中并不具有高度的稳定性和相似性，不同的发育期盐芥叶片中产生相同数目但不同种类的同工酶谱带，即盐芥在不同的发育期具有不同的同工酶谱带，推测这种方式可能是盐生植物适应环境变化的方式之一；但拟南芥POD同工酶在特定器官中具有高度的稳定性和相似性，不同的发育期不同的组织器官内具有相同的谱带。

Conventional forest breeding is constrained by its long reproductive cycle, which includes long juvenile period, and by its complex reproductive characteristics, such as self-incompatibility and a high degree of heterozygosis. Gene transformation has played an important role in woody plant improvement, which can shorten breeding period and breed varieties with high salt tolerance.

随着分子生物学技术的发展，从盐生植物中分离出抗盐基因，导入林木，获得抗盐品种；况且林木由于其较长的幼年期，常规育种有明显的局限性，而通过转基因可以在较短时间内获得高抗盐品种，缩短育种周期，因此开展林木抗盐育种具有重要的意义。

Suaeda salsa is one of the wild resource in seashore salt marsh and inland of saline soil.

盐地碱蓬是盐碱土和海滨沙滩上的野生资源，是盐生植物群落的优势品种，也是发展海水灌溉农业的优良野生经济盐生植物之一。

Low concentration of NaCl solution could promote the growth on the shoot of seed germination. The growing length of roots and shoots of two halophytes treated by 100 mmol·L~(-1) NaCl reached the highest and the growing condition on shoots was best. Then some physiological and biochemical parameters including the content of Na~+, K~+, Ca~(2+), proline and plant leaf tissue water potential, the assays of membrane lipid peroxidation and antioxidant enzymes were determined with the two halophytic plants on salinity.

研究工作首先对盐爪爪和盐穗木在种子萌发阶段的耐盐性进行了比较研究，表明盐爪爪和盐穗木都是很耐盐的盐生植物，在种子萌发期，盐穗木比盐爪爪更耐盐；NaCl和等渗的聚乙二醇对种子的萌发都产生抑制作用，且PEG的抑制程度大于等渗的NaCl。

NaCl and iso-osmotic PEG had inhibitory effect on the germination of two halophytic seeds, and the inhibitory level of PEG was greater than that of iso-osmotic NaCl. Inhibitory effects of NaCl and water stress mainly showed lowering the seed germination rate, delaying initial time of seed germination and extending the time of seed germination.

本研究从生理和分子角度对其耐盐性进行了初步的探讨，开展这两种盐生植物耐盐相关基因的克隆及盐爪爪液泡膜上多个耐盐相关基因的遗传工程，为作物和林木的遗传改良奠定坚实的理论和实验基础。

Analyzed the salt content and degree of mineralization of ground water of plough level in the irrigated area where in the east of Hebei, according to different standard to divide the rice belt into suitable district, halophytic vegetation district, salt-tolerant crop district and dry crop district, then it proposed relevant planting technique and assorted technical measure.

分析了冀东滦下灌区四县稻田土壤耕层的全盐含量和地下水矿化度，并依据我国盐渍土壤划分标准和不同作物的耐盐能力，将该稻区划分为宜稻区、盐生植物种植区、耐盐作物种植区和大田旱作物种植区，并提出了各个区域的种植技术方案及配套的工程技术措施。

Lastly,several key problems remaining to be solved in future researches into seed germination of halophytes,as well as the significance of the study on seed dormancy and germination of halophytes, are summarised.

最后，作者提出了将来研究盐生植物种子萌发需要解决的几个重点问题以及研究盐生植物种子休眠和萌发问题的意义。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。