BIOL 1050 Chapter Notes - Chapter 38: Seed Dormancy, Meristem, Epicotyl
2 May 2019
School
Department
Course
Professor
Document Summary
Recap: this process includes endosperm development, embryo development, seed dormancy, seed germination, seedling development, and owering. A edict with its two cotyledons is heart-shaped at this stage/a monocot develops only one cotyledon. Soon after the rudimentary cotyledons appear the embryo elongates. Cradled between the two cotyledons is the embryonic shoot apex. At the opposite end of the embryo"s axis, where the suspensor attaches, an embryonic root apex forms. After the seed germinates (and for the rest of its life) the apical meristems (regions of actively dividing cells) at the apices (tips) of the roots and shoots sustain primary growth. During the last stages of maturation, the seed dehydrates until its water content is only about. The embryo, which is surrounded by a food supply (endosperm, cotyledons, or both) enters dormancy: it stops growing and its metabolism nearly ceases. The embryo and its food supply are inclosed by hard, protective seed coat which is formed from the integuments of the ovule.
