旱生植物

The morphological structure of leaf of 6 plants was as follows: Nitraria tangutorum was thickness, Nitraria tangutorum and Ceratoides lateens was coated with hair, Haloxylon ammodendron was degenerated to branch, Kalidium gracile was with tisuues for holding water.

6种植物叶片旱生结构特点表现为：唐古特白刺叶片较厚，唐古特白刺及驼绒藜表皮具有毛，梭梭叶片退化为同化枝，盐爪爪具有丰富的贮水组织，此6种植物叶片内均有含晶细胞。

These individual characters are similar to those of most aquatic plants in monocotyledonous Helodiales and dicotyledonous Nymphaeales, which reflects the phylogenetic relationships of Iris from aquatic plants to xerophil.

这些个体性状与单子叶沼生目和双子叶睡莲目多数水生植物相似，从一定程度上可以反映鸢尾属植物从水生到旱生的系统发生上的关系。

The result indicated that: with the change of ecological factors and intensification of human activities,strong stability of grassland community structure of the local alpine meadow type along the highway in this region was found,proportion of medium xerophilous、rhizomous grass increased;alpine grassland community had relatively low stability,grassland community successed naturally to adapt to the new environment;...

结果显示：随着生态因子发生变化和人类活动的加剧，该区公路沿线高寒草甸类草地群落结构表现出了较强的稳定性，中旱生耐旱的根茎型禾草比重有所增加；高寒草原植物群落稳定性相对较差，草地群落为适应新的生境而发生了自然演替；沼泽化草甸亚类草地植物群落中群落伴生种的种类增加，优势种嵩草属植物在群落中的比重有所下降。

This paper made a systematic research on Lonicerafulvotomentosa Hsu et S.C. Cheng, which grows well inkarst areas, from its biological characteristics, such asmorphology, growth and physiology. The main conclusions asfollows:(1)From the viewpoint of morphological anatomy, it hastypical xerophyte structures such as well-developed epidermisand tissues that transport water effectively, small leaf area,dense floss under the leaf surface, high stoma density, thesmall opening degree, thick cuticle, well-developed xylem andpalisade tissues, etc. The pollen of L. fulvotomentosa isseems to be spherical, and has 3 grooves, much bulge on theepidermis evenly. The shape of pollen is an important featureon taxonomy. The ripe fruit has from 1 to 18 seeds, some fruitbranch has 135 berry, its diameter is up to 0.8 centimeter.(2)From the viewpoint of growth, L.

本文从形态解剖、生长发育的节律、光合生理特性以及种子萌发生理等生物学特性方面对喀斯特适生经济植物黄褐毛忍冬进行了较为系统的研究，得出以下结论：(1)在形态解剖上，黄褐毛忍冬根茎中含有发育良好的周皮和输导组织，导管密度大，横截面宽，周皮的形成具有节制蒸腾、通气作用和保护组织免受外界环境影响的作用，宽的导管对水分的输导效率高；叶片密被绒毛，面积较小，气孔密度大、开度小，厚的角质层和发育良好的木质部和栅栏组织等是典型的旱生结构；黄褐毛忍冬花粉近球形，具3 孔沟，表面具均匀分布的小刺，刺间具网状纹理。

The leaf anatomical structures of the mosses are of ecological adaptation to their habitats. The mosses wider dry conditions often have thickened laminal cell-walls on the surfaces, and some of them have appendiculate structures.

藓类植物叶的解剖结构具有生态适应意义，旱生环境下的藓类植物，叶片细胞胞壁具不同程度的增厚，有些藓类植物叶片具附属结构，藓类植物中肋的有无，反映了对水分吸收和运输方式的不同。

According to the differences of mesophyllous structures,the 30 species of plants ob...

沙生植物以不同的旱生结构特征和不同的方式适应沙漠环境。

Psammophytes ; Xeromorphic structures ; Sandy desert environment ; Ecological adaptation ; Xinjiang

沙生植物；旱生结构；新疆；沙漠环境；生态适应

But at the same time,itexisted in the fact that the water environment was amended,showingthat many lakes and ponds such as Hong Jiannuo Lake appearing andexpanding in the end of Qing dynasty.4.The vegetation in Mu Su Desert passed through several phases inhistorical times,the main phases are:the species composition ofvegetation community was gradually simplified;xeromorphous and sandyplant increased;the status of desert vegetation rose evidently.However,the change of vegetation zonation means that forest plainchanged into drought plain did not occur.5.The main modality of Mu Su Desert land degenerating has beendesertification,it had occurred before human activities intervenedintensively.Two-thirds of land has been desertification at variousdegrees.

但与此同时，也存在着局部的水环境改善，突出表现为红碱淖等湖沼在清末民初的出现和扩大。4、毛乌素沙地的植被在历史时期经历了群落种类组成渐趋简单、旱生沙生资源植物增加、荒漠植被地位明显上升等变化，但是并不存在由森林草原到干草原的地带性植被变化。5、沙漠化是毛乌素沙地土地退化的主要表现形式，在人类活动强烈干预以前就存在着，秦汉以来，有大约2／3的土地发生了程度不同的沙漠化。

Species in Ceratoides are semi-shrub xerophytes distributed in arid and semi-arid area. They have great potentialities to ecological restoration and high value to being used as forage. However researches on their physiological characteristics related to drought adaptabilities were not sufficient, yet.

驼绒藜属植物为干旱、半干旱地区具有重要生态价值和饲用价值的旱生半灌木资源，对该属植物适应干旱生理特性的研究尚不充分，加深研究有助于提高对它们的利用效率和应用价值。

Trehalose-6-phosphate synthase, a key enzyme in trehalose synthesis pathway of plant, plays an important role in response of exrophilous rock lily and other resurrection plants to severe abiotec stress.

海藻糖-6-磷酸合成酶是植物海藻糖合成途径的关键酶，在旱生巻柏等复苏植物对逆境胁迫应答中起重要作用。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。