Pal activity decreased and isoflavones content increased in the late period of seed development , this might be caused by residence time of isoflavones accumulating . it is necessary to make further study 在种子发育进程中，种子和叶片中pal活性都呈先上升后下降的趋势，到开花后第39天达到最大值，而后下降。
As an effective evolution strategy of angiosperms , double fertilization can enhance the survival of the embryos , seeds and seedlings in which endosperms play a key role in the development of seeds and embryos 摘要双受精是被子植物的一个有效的进化策略，增加了胚和种苗成活的机会，其中胚乳在胚以及种子发育中至关重要。
The results indicated that isoflavones increased with the accumulating of soluable protein , and there was marked positive correlation between them . isoflavones content increased with soluable sugar content in early stage of seed devel 大豆种子发育过程，各个品种异黄酮的积累与蛋白质的含量间呈极显著的正相关，随着种子中可溶性蛋白质的增加异黄酮的含量也提高。
This paper reviews the progress in research on seed proteins and proteomes in relation to seed development and formation , dormancy and germination , seed preservation and seed vigor , and the interaction between seeds and the environment 摘要综述了种子蛋白质与蛋白质组的研究，主要介绍了种子发育与形成、种子休眠与萌发、种子保存与活力以及种子与环境相互作用的蛋白质与蛋白质组的研究。
Studies on genes related to embryo and endosperm development are leading us to an extensive understanding of the mechanisms of seed development and apomixis at the molecular level , which will benefits the research for yield and quality improvement of plant seeds via genetic engineering 对胚和胚乳发育相关基因的研究，可使人们在分子水平上解析种子发育和无融合生殖的分子机制，更有效地开展植物种子产量和品质改良的基因工程。
The study of isoflavones in leaves with the development of seeds showed that the content of isoflavones in leaves was much less than that in seeds . the correlation analysis showed there was marked negative correlation between them two . the activity of phenylalanine ammonia - lyase ( pal ) in different organ before seeding has been studied 种子发育时期，种子中异黄酮含量与叶片中异黄酮的含量呈负相关，达到极显著水平，表明种子发育过程中，叶片中的异黄酮是逐渐向种子中转移的。
The study of the structure and function of these promoters will help not only to comprehend the development of seeds and the mechanisms of gene expression and organic substance accumulation but also search for some promoter elements useful for plant genetic engineering 对这类启动子的结构和功能元件的了解，有助于人们更加深入地理解高等植物基因表达调控机制，提高人们对植物种子发育过程及有机物在种子中积累机制的认识，而且可以为植物基因工程中生物反应器的研究提供有应用价值的启动子元件。
First , the ceratoides . l seed belongs to low nutrition seed and it " s nature longetivity was short ; second , because of the harsh environment during seed developing , seeds were short of nutrition and the development were uncomplete ; third , because of the unsuitable storage condition , especially because the water contens was higher , the seed deteriorated rapidly 对驼绒藜属植物种子短命和劣变原因的初步分析，认为是由遗传和环境两方面的原因所至：一是由于驼绒藜植物属于高数量低营养种子类型，种子自然寿命较短。二是由于种子发育过程中自然环境恶劣，造成种子营养不良，发育程度较差。
