FRST 303 Lecture 18: November 13, 2014
Document Summary
Last day: buds are little embryonic shoots, apical buds at the top of a tree, lateral buds that will form branches, adventitious buds can be anywhere and be dormant for years, if a branch is broken off in a storm they may be activated, determinant and indeterminate species, determinant species the number of leaves that will be formed in the next year is determined in the previous year, indeterminate species has a few of the leaves determined before hand but it will produce as many leaves as the environment allows, bud scales, environmental influences on bud formation, photoperiod measured by phytochrome and then growth hormones actually initiate bud growth. It is the night length that is important: latitudinal effects a seed from down here is planted 10 degrees north is going to read the environment wrong and be killed by the frost that comes earlier up north, knowing about the night length , development of frost hardiness, two phases.
