DORMANCY SEASONAL GROWTH CYCLES Annuals Biennials Perennials DORMANCY
DORMANCY & SEASONAL GROWTH CYCLES Annuals Biennials Perennials
DORMANCY §Period of time when the growth or activity of a plant or seed stops due to changes in temperature or amount of water §Dormancy allows various species to survive in particular environments.
SEASONAL GROWTH CYCLES §Influences § Temperature § Amount of water § Amount of daylight §Determined by: § Where plants live § How they reproduce § Roles they play in their environment
ANNUALS
ANNUALS § Once per year – whole life cycle in one season § Needs to be replanted the next year § Seeds are the dormant form § Examples: § Many weeds § Vegetables § Grains § Wild Flowers
BIENNIALS
BIENNIALS §Every two years §Entire life cycle in two years § Year one – roots, stems, leaves § Year two – flowers and seeds §Examples: § Carrots § Foxglove § Parsley
PERENNIALS
PERENNIALS §Do not die every year or every other year §Persist for many growing seasons §Herbacious § Herbs such as coneflower and basil §Woody § Deciduous – loose leaves all at once (Autumn) § Conifers/Evergreens – loose needles, but not all at once
DORMANCY Restated
PERENNIALS -DORMANCY §Seasonal Changes in Trees to survive the winter. All trees lose their leaves at some point. Stop taking in water so the xylem will not freeze. §Trees like pines and holly lose their leaves/needles all through out the year.
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