Growth curves 1.3 Flashcards
State 3 types of plants based on their life cycles.
Annual, biennial and perennial plants.
Define annual plants.
Plants that only have 1 life cycle for a year. They start their life cycle by germinating and ends with flowering or producing seeds.
State the examples of annual plants.
Paddy, pumpkin, watermelon plants.
Define biennial plants.
Plants that take 2 years with 2 seasons of growth to complete their life cycle. First growth season is vegetative growth, the second growth season is reproduction. These plants will produce fruits and seeds before death.
State the example of biennial plants.
Cabbage, carrot, silver cock’s comb.
Define perennial plants.
Refer to plants that live more than 2 years. Can be classified into woody PP and herbaceous PP. These plants are able to flower and bear fruits many times, have structures that are adaptable to their surroundings and temperature change.
State the example of perennial plants.
Grass, hibiscus, mango plant.
What is the shape of growth curve of plants?
Sigmoid curve.
State the stages of the growth curve of annual plants.
Decrease in dry mass ( food in cotyledon is used for germination ), increasing in dry mass ( photosynthesis can happen=produce food ), constant dry mass ( plant is matured ), decreasing dry mass ( flower and seed dispersal ).
State the processes that occurs in the seasons of biennial plants.
Consists of 2 sigmoid curves. First growth season, the plants undergo vegetative growth, photosynthesis takes place, food is stored in tubers ( tubers is enlarged structures used as storage organs for nutrients in some plants in the roots ). Second growth season, food stored is used to produce flower and seeds.
State the growth curve of the perennial plants.
Consists of a series of sigmoid curves. rate of growth is high during spring and summer, rate of growth stop during winter. Annual ring is formed by these changing growth rates
