根的生长

Positive staining of Stro-1 was found in 7.6% of SCAP. Morphologically, PDLSCs were fusiform-shaped, with many short and long ramifications under a scanning electron microscope, and the secreted extracellular matrix were around them.

透射电镜下可见，第1～3代牙周膜干细胞及根尖牙乳头干细胞生长良好，胞浆内线粒体，高尔基体和粗面内质网丰富，随着培养时间的延长，分泌的细胞外基质增多。

Stramonium root, stem and leaf on seed germination and seedling growth of sesame and millet were studied.

因此，曼陀罗叶浸提液强烈抑制了芝麻和粟的种子萌发和幼苗生长，茎浸提液和根浸提液也都存在一定的抑制效应，但都弱于叶浸提液。

They were, as a group, semiliterate, proud, and stubborn, as dogged in their insistence on their own way of life as pine roots cracking granite to grow.

们的另一些特点。作为一个整体，他们是半文盲，高傲并且顽固。他们坚持自己的生活方式就象松树根在花岗石中爆缝生长。

Subsoil acidity is one of the serious problems in crop production in the humid and subhumid tropics; therefore, the amelioration of acid soil profiles is an important practice for improving the yield and quality of crops.

在热带和亚热带地区，底土酸性常为限制深根性作物生长之因子之一，故强酸性土壤的剖面酸性之改良，为提升作物生育及品质的重要举措。

Progress in the study of the influences of light, water, herbivory and fungal symbiont on the growth and survival of Dipterocarpaceae seedlings is briefly summarized, and the prospects in the future are also discussed.

就光照、水分、动物捕食和菌根共生体对龙脑香科植物幼苗生长与死亡的影响进行了综述，并对未来研究的发展方向作一展望。

The result showed that the plant of Maicao No. 9 was tall, with good fecundity, fully filled grain and vigorous growth. The chromosome number of the root cells was 2n=56, through the observation of pollen mother cells meiosis, there were a certain amount of univalents, ring bivalents and bar bivalents in PMCM. Different numbers of lagging chromosomes, chromosome bridges and micronucleus were found in anaphaseⅠ, anaphaseⅡ and tetraspore.

结果表明：麦草9号植株高大，结实性较好，籽粒饱满，生长旺盛；根尖细胞染色体数目为2n=56，对其进行花粉母细胞减数分裂观察，中期Ⅰ具有一定数量的单价体、环状二价体、棒状二价体；后期Ⅰ、后期Ⅱ与四分体时期都出现不同数量的落后染色体、染色体桥、微核等现象。

Corona 1. In flowering plants, any type of outgrowth from the petals or sepals, such as the trumpet of the daffodil flower.

冠；根颈；副花冠：1 在开花植物中，任何从花瓣或萼片中向外生长的部分，例如水仙花的喇叭形状。

Twenty three troublesome weeds and five crops were tested to study specificity of helminthosporin. The result showed that 18 out of the 28 species were susceptible to the toxin. Chenopodium serotinum is the most susceptive, and D. sanguinalis, Polygonum aviculare, Beckmannia syzigachna, Chenopodium album and Alopecurus japonicus took second place.

该毒素在150μg/mL浓度下，对马唐胚根生长抑制率达44.59%；当毒素浓度达到200μg/mL时，叶绿素含量下降18.41%；在500μg/mL浓度下，毒素对供试的23种杂草产生的毒害程度不同，其中小藜对毒素最为敏感，其次为马唐、萹蓄、菵草、藜和日本看麦娘等恶性杂草。

The effects of different concentrations of various hormones on the root number and length of Limonium bicolor were studied and the survival ratio and growth of plantlets in different substrates were evaluated.

摘 要：以二色补血草为材料，研究了不同浓度激素配比对试管苗生根量及根长的影响，以及生根苗在不同移栽基质中的成活率和生长状况。

On the leaving farmland, by surviving the seedling out rate, the feeding grass surviving rate, reviving rate, growth speed, tillering numbers, cluster measurement, degree of cover, root measurement, root Weight, fresh grass yield and hay yield, and so on, four kinds of feeding grasses which were Medicago sativa L., Dactylis glomerata L., Cichorium intybus L., Astragalus adsurgens Pall., were confirmed that can adapt the native ecosystem term and acquire good economic benefits in that year ; Bromus inermis Leyss. growed slowly in the first year, but Behaved well in the next year; Silpniumperfoliatum L.

弃耕地上通过对牧草出苗率、存活率、来年返青率、株高、分枝分蘖数、丛幅、根幅、根量、鲜草产量及干鲜比等的量测，确定苜蓿王、沙打旺、菊苣、鸭茅这四种牧草能适宜当地生态条件并于当年获得好的产量；无芒雀麦第一年生长较慢，但第二年表现良好；串叶松香目前为止表现不佳，能否引进成功有待观察。

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。