II. Soil mixing station; potting bench; where to find six-packs
III. Seed morphology basics
A. An embryonic plant enclosed in a hard coatB. Evolution of higher plants (the flowering plants/Angiosperms) – previous 'improvements' in evolution were the mosses and ferns and liverworts which do not have seeds but propagate by other means
C. Parts of a seed
- Outer covering – seed coat – may be so hard to require manipulation to allow seed to grow seed coat helps protect the embryo from mechanical injury and from drying out.
- Source of nutrients for the new plant – may be stored in the first leaves or may be stored around the plant in an endosperm – cotyledons of peas and beans are swollen because they are the storage of nutrients for the new plant
- Embryo – composed of the Hypocotyl, Radicle and cotyledons – the little plant
- Dormancy – caused by many different factors, not usually a factor in most popular seeds because they have adapted to human sowing – wildflowers and CA natives are not adapted to human sowing and dormancy is the leading cause of madness among seed sowing.
1. Not all seed germinates at the same time to insure survival of the species2. Delayed germination insures passage of seasons for seed to germinate at the most auspicious time3. Event – such as fire – may help species out-compete other plant species4. Steps to work around will be covered in later lecture
E. Tools to use in sowing seeds -tweezers widget Swiss Army Knife spoons packet
F. Stratification typeshot water fire cold alternating temperatures filing treated with acid
F. Upsizing plantspricking out potting on setting out into the ground
G. Sowing in the ground – carrots, radishes
H. Setting plants out – lettuce