英语释义

1. one of the granular microspores that occur in pollen and give rise to the male gametophyte of a seed plant

片语

impotence of pollen grain花粉粒不育

four-flodj pollen-grain四合花粉粒

pollen grain germination花粉粒萌发

Pollen grain morphology花粉形态

compound pollen grain复花粉粒

single pollen grain单花粉粒

Pollen grain formation stage花粉粒形成期

pollen n grain花粉粒

pollen grain of花粉中造粉

英汉例句

• the pumpkin pollen grain in the middle is0.2mm and just about visible to the naked eye

  中间的南瓜花粉有0.2毫米，肉眼刚刚能看见。

• the mature pollen grain is 2-cells and the tapetum is secretory type.

  成熟花粉粒为二细胞型，绒毡层为分泌绒毡层；

• the probability of any air-borne pollen grain impacting a female strobilus is in any case very small.

  任何在空气中飘浮的花粉粒粘着于雌球花的几率，在任何情况下都是很小的。

• in present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in ramie were observed.

  本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。

• but h8 strain's pollen grain of sp3 generation is distorted and shrunken.

  而sp3代h8株系两性花的花粉粒皱缩、扁瘪、塌陷。

• there occurs pollen abortion during the stage from tetrad to single nucleus pollen grain of cytoplasmic male-sterile line in brassica napus var. oleifera(raphanus sativus l. ).

  甘兰型油菜萝卜细胞质雄性不育系的花粉败育发生在四分体至单核花粉粒阶段。

• pollen grain is mainly 2-celled type when shed, occasionally 3-celled type, and has three apertures.

  成熟花粉多为2-细胞型，偶见3-细胞型，具三萌发孔。

• a microscopic fossil, as of a pollen grain or unicellular organism.

  通过同一植物上的其他花的花粉来授粉。

• the locomotion of sperm cells from pollen grain into the tube was examined by using the above technique.

  用同样的方法，也观察了精细胞在花粉管中的运动。成对的精细胞可以从花粉管中释放出来。

• for pollen grain nutrition of maize are assimilated and utilized well, the methods of rupturing pollen wall are very important the authors studied three methods of rupturing pollen wall.

  为了使玉米花粉的营养成份能够更好地被吸收利用，花粉的破壁方法至关重要。

• the mature pollen grain is 2-celled.

  成熟花粉为2-细胞型。

• the polysaccharoses present in the mature pollen grain accompary with proteins.

  成熟花粉粒中多糖和蛋白质并存。

• the results showed that the pollen shapes of all 11 cultivars were near spherical in equatorial view. the size of pollen grain showed great variation among cultivars.

  结果表明：11份花粉都呈近球形，花粉粒大小在所观察的材料间有较大差异。

• the flower bud died, the flower did not bloom under high temperature and short pollen grain life of the male parent were the most important factors to decrease the bearing rate.

  高温下造成母本死蕾和闭花以及父本花粉寿命缩短是结实率下降的重要原因。