seed n. (pl. seed(s)) 1.〔集合词〕【植物;植物学】种;种子。 2.颗粒;晶粒。 3.〔pl. 通例 seed〕 【生理】精液;鱼精;鱼卵;蚝(等的)卵。 4.子孙;苗裔;后裔;种族。 5.〔pl. 通例 seeds〕萌芽;根本;根源。 6.(玻璃中的)气泡。 the seeds of disease 病因;病根。 go [run] to seed 1. 花谢结子。 2. 消瘦;失去活力;衰颓[落];〔美国〕成为废料。 in seed 1. 在结实[结子]时期。 2. 播着种的。 raise up seed 繁殖子嗣。 vi. 1.播种。 2.结实;结出种子;成熟;脱籽。 vt. 1.播(种);去…的核;脱…的籽;弄去…的种子。 2.催促发育[成长];催化;催促加速。 3.用种子花样装饰;把…做成点花底子。 4.【运】从(运动员)中挑选种子选手。 seeding stage 出苗期。 seeding time 播种期。 seed down 撒种;播种。 seed the draw 【运】安排种子选手分布在各组出场。
According to the statistics of main journals about late 50 years in our country, our phytologists pay attention to the comparative anatomy studies of the carpoplyte, such as the structure of vascular tissue, leaf and leaf epidermis, the structure and development of flower, the characteristic of seed and seed coat, the secretory tissue, some primitive carpophytes and so on 根据近50年国内主要期刊统计,我国植物学者重点在种子植物的维管组织结构、叶及其表皮结构、花的结构和发育、种子及种皮特征、分泌组织以及一些原始种子植物等方面开展了比较解剖研究,为一些植物科、属的系统分类提供了解剖学依据。
(2 ) it is the tactics of keeping the seed storehouse under the adverse environment that seed spreading has the dispersiveness of time, space heterogeneity of the seed spreading and the dormancy in summer, ( 3 ) the seed coat of lepidium pertoliatum l . and lepidium apetalum willd . make the seed bigger, which is useful to promote the seed sprouting and developing of seedling by absorbing the around moisture 具体表现为:(1)植物的生长发育以及植物的生长节律,均受到环境的影响;(2)种子的分批成熟,种子传播具有空间随机性以及种子具有夏季休眠的特性,都是种子在恶劣环境下保存种子库的策略(3)抱茎独行菜和独行菜的种衣一方面可以使种子大粒化,另外还利于吸收水分有助于促进种子萌发和幼苗发育,这些对种群的延续具有重要的意义。
The morphological characteristics are recognized as 3 types : nearly globe, nearly boat shape and nearly shield shape . the exine ornamentation can be divided into 5 types : reticulate, steiate-veticulate, tuberculate, verrucate and rugose-sinuate . the morphological characteristics show some vaviations among sections and species in terms of the shape of pollen and the exine ornamentation . and thus can be used as one of characters in the consideration of the classification of this genus . ( 4 ) the micromorphology of the seed coats were observed in 13 species (4)所观察的该属13种植物的种皮表面纹饰可分为网纹、负网纹和皱波状三大类,且各个种之间在种皮微形态上均存在着一定差异,可以作为分种的依据;在组间,除属于有苞组(sect.amana)的t.edulis和其它组的种类有明显差异外,其余3组之间没有明显的界限,说明郁金香属的种皮微形态特征在组的划分上意义不大,但在种的划分上具有一定的分类学意义。