根的生长

The results showed that it adapted to saltmorphic circumstances through the following characters: A lot of aerenchyma existed in the vegetative organs;Phellem highly expanded in roots;thick cuticula;more mucilage cells and aleurone grains in parenchyma of roots and stems;A lot of water storing...

结果表明，不同生态环境中生长的马齿苋解剖结构显著不同，盐生马齿苋具有适应盐渍环境的结构特征，这些特征表现为：营养器官通气组织发达；根的次生结构中木栓发达；根、茎的薄壁组织中含有大量的黏液细胞和糊粉粒；叶片表皮的角质膜厚；叶肉中含晶细胞、叶绿体及贮水组织丰富；而这些特征是黑土地上生长的马齿苋所不具备的。

Boletus edulis, Gomphidius viscidus, Laccaria bicolor and Leccinum scabrum, growing in the media with different mass concentrations of DDT were studied in vitro.

结果表明：DDT没有影响外生菌根真菌的生长模式，只是改变了其生长速度和生物量积累。

Applying 6% organic materials + 500mg kg〓 N fertilizer, we got the result that the N content is the highest in leaf, stem and absorbing root and promoted 46%, 28%, 44% respectively compared with controls; N% increased most significantly in ligneous root and growing root of 200 and 500mg kg〓 N fertilizer, by 32% and 29% respectively.

叶、茎、吸收根N％以6％有机物料+500mg kg〓氮肥处理最大，与CK相比，分别上升了46％、28％和44％，单纯施用200和500mg kg〓氮肥的处理中木质根、生长根的N％增加最明显，分别提高了32％和29％。

A study on the anatomical structure and the barbloin's store place of Pulsatilla chinensis of different growth lengths by anatomy and barbloin histochemical localization shows that multicellular nodulos, secretory cavities and secretory ducts in phelloderm and secondary phloem are the primary place of the barbloin substances and the major structural characteristics, wide or narrow of the secretory ducts is related to the growth length, 4 to 5 years old reaches maximum.

利用解剖学和组织化学定位方法对不同生长龄白头翁根的解剖结构和皂苷的储藏场所进行了研究。结果表明：栓内层和次生韧皮部中的分泌细胞团、分泌腔和分泌道是白头翁根的主要结构特征，是皂苷类物质的主要贮存场所；而分泌腔和分泌道的数量及分泌道的宽窄与生长年限相关，4~5年生达到最大值。

The results indicated that:(1) plant height and tillering number decreased, and root length, root surface area, root volume and rootlet number increased under drought stress; straw mulched on surface soil and pig manure mixed in soil could improve the growth and morphological property of rice root, while straw mixed in soil and pig manure mulching had no significant effects;(2) the contents of chlorophylls and the activities of SOD, POD and CAT decreased significantly under drought stress, and straw mulching on surface soil and pig manure mixed in soil could restrain these decreases.

结果表明：①干旱胁迫下水稻株高降低、分蘖数减少，根系则表现出主根伸长、支根增多、根表面积和根体积增加；秸秆表施和猪粪混施可明显改善水稻的生长和根系形态，而秸秆混施和猪粪表施的改善作用不显著；②干旱胁迫下叶片叶绿素含量显著降低，超氧化物歧化酶、过氧化物酶及过氧化氢酶活性均显著下降，秸秆表施和猪粪混施能够在一定程度上抑制这种下降幅度。

The correlations between the crown length, wideness and dry weight of Rosa seedling were analyzed.

分析处理苗根颈长、粗和遮荫苗干重之间的相关性，结果表明：遮荫使蔷薇实生苗根颈的伸长的同时也降低了根颈的粗度，从而影响了蔷薇苗后期的生长。

In addition, AM fungi from a wide range of environmental conditions (originally isolated from north, central and south China) were used to study the ecological adaptability of AM fungi and the influence of edaphic conditions on AM fungal growth and metabolic activity.

丛枝菌根共生体由宿主植物和真菌共同组成，菌根真菌的生长、代谢活性、菌丝分布以及生态适应性等特征不但与菌根效应、菌根真菌的生态功能密切相关，而且受到宿主植物和土壤条件的影响。

The vertical roots of short-lived grasses Erodium axyrrhynchum and annual grasses Ceratocarpus arenarius formed before May so to avoid the drought season.

3一年生草本植物角果藜的根系垂直生长主要发生在4月至5月中旬，短命植物尖喙牻牛儿苗的根系垂直生长主要在5月之前，两者都是在干旱季节来临之前垂直根迅速生长，以增加水分吸收。

This paper studied branching characteristics of the young maize radicels with growth ages 9 and 19 days using potted experiment in greenhouse under the condition of no stresses of water and nutrients based on simplified hidden-semi Markov model.

摘要控制玉米植株生长在不受水分，养分胁迫的条件下，采用室内盆栽实验方法，以播种后生长了9天和19天的玉米(农大108)胚根为研究对象，基于简化的隐式半马尔科夫模型，分析了玉米胚根的分支特性。

When cultured on the medium with different auxin , root segments could elongate and branch, and the addition of 1mg/l IBA into the medium was the most suitable for long-term root culture. Calli could be induced from root explants in the presence of 2, 4-D and when transferred onto E medium, they transformed further into embryonic calli which could develop into normal plants through the stages of globular-embryo, heart-shaped embryo, torpedo-shaped embryo, cotyledonary embryo.

培养基中添加生长激素（IAA，IBA，NAA）能够诱导无菌苗根切段的生长和分枝形成；而1mg／l IBA的存在，最适合于根的长期离体培养。2，4-D的存在能够诱导根外植体脱分化形成愈伤组织，愈伤组织转移至E型分化培养基能够转变成胚性愈伤组织，并进一步经球形胚、心形胚、鱼雷形胚、子叶形胚发育成正常植株。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。