胚乳

• In flowering plants the endosperm tissue is usually triploid , resulting from the fusion of one of the pollen nuclei with the two polar nuclei
  在开花植物中，胚乳组织多为三倍体，由一个花粉核和两个极核融合产生。
• Kara belonged to relatively primitive sect . leymus hochst . , with bigger endosperm cells than those of l . multicaulis ( kar
  了了js具有较大的胚乳细胞，其长宽比也较大;属于较进化的seot . anjs勿妙了u厉( griseb . ) tzvel .的多枝赖草乙
• Gymnosperms lack endosperm and the precise double fertilization characteristic of the angiosperms , although some show a primitive form of it
  尽管裸子植物还保留有某些被子植物的基本形态，但它没有被子植物所特有的胚乳以及双受精现象。
• The pollen grain germinates on a special extension of the carpel , the stigma , and double fertilization results in a diploid zygote and triploid ( usually ) endosperm nucleus
  花粉粒在柱头上萌发，双受精导致双倍体的合子和三倍体的胚乳形成。
• It also showed that the seed building ability was weaker , linear dry matter accumulation ability was stronger and endosperm water losing was earlier
  研究还表明，西南山地玉米籽粒发育的特点是籽粒建成能力较弱、干物质线性积累能力很强、胚乳失水成熟早。
• When a pollen grain germinates , a pollen tube pushes its way out through an aperture in the pollen grain wall , and the nuclei migrate into the tube
  生殖细胞核分裂，形成两个仅由细胞核和细胞质构成的精子，其中一个将与卵受精，另一个则与极核融合形成胚乳核。