Functions of calcium during fertilization of angiosperm is one of research focuses for botanists 钙在被子植物双受精过程的作用一直是植物学家的兴趣热点。
Chalaza ( pl . chalaxae or chalazas ) the region of an angiosperm ovule where the nucellus and integuments merge 合点:被子植物胚珠上的一个区域,在合点处珠心和珠被愈合。
The process is restricted to certain angiosperms but a primitive form is known from some gymnosperms 此过程仅限于某些被子植物,但从裸子植物中也发现了一些较原始的形式。
Unlike the companion cells of angiosperms , they are not derived from the same mother cell as the sieve cell 但与被子植物的伴胞不同,它们不和筛胞起源于一个共同的母细胞。
Gymnosperm a general term for any seed plant except the angiosperms , characterized by bearing naked seeds 裸子植物:被子植物以外的种子植物统称裸子植物,以种子裸露为特征。
Angiosperms the flowering plants constituting by far the largest phylum ( anthophyta or angiospermophyta ) of vascular seed plants 被子植物:由显花植物组成的最大的一门维管种子植物。
The origin and radiation of angiosperms ( flowering plants ) have long been important issues attracting botanists 因此,对研究被子植物(有花植物)的起源与演化以及单子叶植物的起源具有重要价值。
Seed development , which involves in multiple genes and their interactions , is a central part of the reproductive process in angiosperms 摘要种子发育是被子植物繁殖的中心环节,涉及众多基因及其互作。
Generative nuclei the two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms 雄原核:在被子植物花粉管中的生殖细胞(应为雄原核译者注)分裂成两个配子的核。
Bundle sheath the ring of parenchymatous or sclerenchymatous tissue , usually one cell thick , that surrounds the vascular bundle in an angiosperm leaf 维管束鞘:在被子植物叶中,围绕维管束的通常是一层薄壁或厚壁细胞。