Micropyle

The micropyle is Seed plant The ovule Due to the top The beads are A small hole or a small gap healing and the formation of the micropyle, also known as.
Micropyle

Micropyle The introduction

ZH K: [phonogram ng] English North square:
  

finger Seed plant The ovule Due to the top The beads are A small hole or a small gap formed by healing. Porogamy. Botany The micropyle is. Pollen tube The channel enters. Ovule development into seed After the development of the A hole .
Also called Egg hole . seed A small hole on the outer skin, is opening beads wrapped incompletely formed ovules. The ovule, which is in the pollination and Be fertilized In the process of pollen tube into the site . In mature seeds, which may be The germination period Imbibition An important entrance of water.

Micropyle The origin of development

Ovules, first by placenta lower epidermis cells divide and produce neurites, become ovule primordia. The front primordia (nucellus), become the nucellar primordium base will develop into Funicle (funiculus). Later, at the base of the occurrence of the annular protuberance gradually extended upward growth, will be formed by the integument nucellus (integument). tomato , Sunflower , walnut Only one layer The beads are But, most dicotyledonous and monocotyledonous plants, such as rape, cotton, lily, such as rice and wheat with double integument, the inner integument and the outer integument. The beads were formed in the process. Nucellus The front left a small hole, called the micropyle (micropyle), and one end of the micropyle relative, integument and nucellus commissural region called Point (chalaza). The ovary wall of the vascular bundle from the placenta after funicle to point into the ovule, the transport of nutrients into the ovule.