发育

The morphogenesis of floral organs in both srg mutant and wild-type rice Dular (Oryza sativa L.) was observed using the scanning electron microscope. The results showed that the floral primordia were differentiated under irregular pattern in srg mutant. After regular formation of lemma and palea primordia, the floral primordium of srg formed lodicule primordia inner to both lemma and palea, followed by the formation of stamens and carpel. Alternatively, floral primordia in srg were split to form two or more floral primordia. The number and position of stamens and carpels primordia were malformed.

利用扫描电子显微镜观察野生型水稻和裂颖水稻的颖花原基分化情况，结果发现，突变体水稻的幼穗在形成内、外稃原基后，有些颖花在形成浆片后并不是直接发育形成雄蕊原基，而是在外稃或内稃原基内侧又分化出浆片原基；有些颖花原基从中间缢裂，缢裂的颖花原基又分别形成类稃片的结构，颖花发育后期，6枚雄蕊发育畸形，并且观察到不同数目的雄蕊。

Furthermore, each developmental phase showed several different phases, these included inflorescence 0 phase, inflorescence Ⅰ phase, inflorescence Ⅱ phase; spikelet Ⅰ phase, spikelet Ⅱ phase, spikelet Ⅲ phase; palea primordium phase, lodicule primordium phase, stamen primordium phase and carpel primordium phase.

在这3个大的发育时期，又根据每一发育时期中的原基分生组织生长发育的程度及先后顺序分别又可分为：花序0期、花序1期、花序Ⅱ期；小穗期Ⅰ期、小穗Ⅱ期、小穗Ⅲ期；内稃原基分化期、浆片原基分化期、雄蕊原基分化期、心皮原基分化期。

Combined analysis of sedimentary environment,diagenesis and tectonic evolution has been applied to obtain the origin characteristics of low resistivity contrast pay.

通过建立低阻油层各种岩石物理成因与地质成因之间的关系，结合沉积环境、成岩作用、构造特征和成藏动力因素等综合分析低阻油层的发育特征，提出了5种具有典型意义的低阻油层有利勘探目标区带：（1）小规模、低幅度构造发育区，（2）天然水淹等构造运动活跃、流体非均质严重的区带，（3）岩性细、粘土矿物组合中蒙脱石含量高的区带，（4）弱水动力环境下砂泥岩薄互层发育区，（5）与火山碎屑沉积演化有关的黄铁矿等导电性矿物富集区。

Cultured in MS medium with different concentration of calcium, explants of Luffa Cylindrica, which could not generate root in usual medium, generated roots with enhanced rates and amounts according to the concentration of supplemented calcium. Moreover, some explants show transformed root from either shoot or flower bud.

在正常Ca2+浓度下，仅激素处理不能生根的丝瓜外植体，处以不同Ca2+浓度处理时，随Ca2+浓度升高，外植体生根数明显加快并增多，且有少量植株叶腋处异化生根，在一定程度上改变了腋芽的发育方向，这说明Ca2+改变了卷须芽或花芽的发育方向，使其发育为根。

Results:LIF improved the development rate of early embryo at the concentration of 0.1,1 and 10ng/ml(P.05).The enhanced effects of LIF were significant for morula and blastocyst stage,not for 1～8 cell stage of embryos.Conclusion:LIF may improve the development of early mouse embryos at the appropriate concentration.

结果：①0.1ng/ml、1ng/ml和10ng/ml浓度的LIF对小鼠早期胚胎的发育和胚泡的形成有促进作用，0.01ng/ml和100ng/ml浓度的LIF对胚胎的发育无明显影响；②LIF对小鼠早期胚胎发育的影响主要发生于桑椹胚和胚泡期，对1～8细胞期胚胎无明显影响。

A development simulation model of greenhouse muskmelon was developed based on the concept of physiological development time.

通过研究甜瓜的发育生理生态过程，建立了以生理发育时间为基础的温室甜瓜发育过程模拟模型，并利用不同播期、地点和品种的试验资料对模型进行了检验。

To observ the toxicity of infected mice and establish mice reproductive toxicity model;②To observe the infected BALB/c female mice ovulation quantums and ovum chromosome;③To observe the oestrogenic hormone( FSH, LH, E2 )level of infected BALB/c female mice;④To observe zygote developmental condition before nidation;⑤To observe embryonic development condition of infected mid-gravidity mice to research the reproductive toxicity and development toxicity of toxoplasma gondii to the BALB/c female mice.

目的： 本实验采用弓形虫感染BALB/c雌鼠，①观察染虫雌鼠的毒性反应，建立生殖毒性的小鼠模型；②染虫雌鼠排卵情况及卵母细胞染色体的变化；③染虫雌鼠性激素(FSH、LH、E2)水平的变化；④着床前受精卵的发育情况；⑤孕中期鼠染虫后胚胎的发育情况，探讨弓形虫对雌鼠生殖功能及胚胎发育的毒性作用。

The outside gill formed the three fingerlike, in the 22、23 stage, it developed at the peak, in the 25 stage, the operculum folded the outside gill in the operculum antrum, the inside gill formed, at the same time the outside gill degenerated.

外鳃进一步发育，形成了三排指状外鳃，到22-23期，达到发育高峰。到胚胎发育25期，外鳃被鳃盖包在鳃盖腔里面，内鳃开始形成，同时外鳃开始退化消失。

These observations show that reprogramming is easier in interspecific embryos reconstructed with ES cells than that reconstructed with somatic cells, and that ES cells have the higher ability to direct the reconstructed embryo development normally than fibroblast cells. Oocytes were reconstructed with outbreeding Kunming albino mouse ES cells and enucleated rabbit oocytes, and the effects of the passages of ES cells and 6-DMAP on the development of interspecific reconstructed oocytes were analyzed. The interspecific reconstructed ES-rabbit oocytes were activated either by combined two set electric pulses and 6-DMAP or by two set electr

以上结果显示，6－DMAP能增加胚胎干细胞异种重构卵的卵裂率，对重构卵囊胚的发育率影响不大；高培养代数和低培养代数的胚胎干细胞用于异种核移植不影响异种重构卵的卵裂率和囊胚发育率；用胚胎干细胞作为供核细胞；比体细胞作为供核细胞所构建的异种重构胚更容易进行重编程，并且胚胎于细胞指导异种克隆胚胎正常发育的能力强于体细胞。

The source rocks of the former are mainly the well-developed, huge thickness of Neogene marine depression sedimentary rocks and Miocene marine sedimentary rocks; those of the latter are significantly the rift sediments of Paleogene continental facies, and large-scale source rocks of medium-deep lacustrine facies and inshore paludal facies with coal measure strata well-developed.

根据南海北部边缘新生代沉积盆地结构、构造特征可将其划分为走滑伸展型和断陷裂谷两大类型，前者以新近系巨厚海相坳陷沉积及海相中新统烃源岩发育为突出特点，后者则以古近系陆相断陷裂谷沉积和大规模中深湖相烃源岩、近海沼泽相煤系烃源岩发育为主要特征，这些烃源岩的发育展布规律、有机质丰度和生烃母质类型、成熟演化特点以及生烃潜力等均差异较大。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。