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Plants Topic 9

Plants IB Topic 9

QuestionAnswer
abiotic factors non-living chemical and physical parts of the environment that affect living organisms and the function of ecoyststems
apoplastic movement it is the movement in the free diffusional space outside the plasma membrane
germination the process by which a plant grows from a seed
gravitropism turning or growth movement by a plant or fungus in response to gravity
halophyte a plant adapted to growing in saline conditions
micropropagation the propagation of plants by growing plantlets in tissue culture and then planting them out
mutualism mutualism
phototropism the orientation of a plant or other organisms in response to light, either towards the source of light (positive) or away from it (negative)
Pollination the carrying of pollen grains (the male sex cells in plants) to the female sex cells for fertilization
potometer a device used for measuring the rate of water uptake of a leafy plant shoot
seed dispersal movement or transport of seeds away from the parent plant sink
sink recieves or stores energy for the plant (roots)
source sends energy for the plant (leaves)
symplastic movement the diffusion of water on the inner side of the plasma membrane
translocation when the sap is pumped into the companion cell and water moves by osmosis
amylase an enzyme, found chiefly in saliva and pancreatic fluid, that converts starch and glycogen into simple sugars.
auxin a plant hormone that causes the elongation of cells in shoots and is involved in regulating plant growth.
cytokinins Another term for Kinin. A compound that promotes cell division and inhibits aging in plants
gibberellin any of a group of plant hormones that stimulate stem elongation, germination, and flowering.
IAA Indole-3-acetic acid is the most common, naturally-occurring, plant hormone of the auxin class.
lignin/ lignified a complex organic polymer deposited in the cell walls of many plants, making them rigid and woody.
maltose/ sucrose/glucose Starch creates maltos/sucrose and glucose to give energy to germinating plants
PFR When Pr absorbs red light, it is converted to the Pfr form. Absorbs at a peak of 666 nm
PR When Pfr absorbs far red light, it is converted to the Pr form Absorbs at a peak of 730 nm
anther where pollen is produced
apical meristem primary meristem tissue with undifferentiated cell s
cambium responsible for secondary growth of stems and roots
casparian strip regulates water and mineral uptake by the roots
companion cells regulates the flow of nutrients through the tubes
cortex storage of photosynthetic products; active in the uptake of water and minerals
cotyledon usually becomes the embryonic first leaves of a seedling
dicotyledon plants with two initial cotyledons (seed leaf)
epidermis protect underlying cells, also allows sunlight to pass through the chloroplast
fungus hyphae Aids plants in nutrient and water absorption
guard cells regulate rate of transportation by opening and closing stomata
micropyle refers to any opening in an ovule's outer layer. This opening allows pollen to fertilize the plant
monocotyledon one seed leaves which develop from the plumule
ovary contains the ovules which has the egg cell inside. After fertilization the ovary becomes a fruit
phloem vascular tissue that distributes organic molecules mainly manufactured in leaves
pollen tube tube that grows towards ovules after pollen is spread on the stigma
procambium cambium in young stage, will form vacular tissue
protoderm early stage, will develop into epidermis
reproductive structures flowers (pistil is the female organ, the stamen is the male organ)
root hair Tube-like extension of plant roots that absorbs water and minerals, increase surface area
sepal Parts that surround and protect the bud
sieve tube transport carbohydrates e.g. sucrose in plant
stem support the leaves, conduct water and mineral to leaves
roots part of plant for support the plant, and absorb water and nutrients
stigma female part that receives pollen
stomata control tradeoff for plant, alloe CO2 in but let water escape
style assist with fertilization by being location where pollen tube travel sperm cell to egg
testa block entrance of water, hinder gas exchange so embryo lack oxygen aka the seed coat
tracheids found in xylem with vessel elements for transport of water and mineral salts
tubers modified stems for nutrient storage, nutrient sinks
vascular bundle transport system, including supporting and protective tissues
vegetative structures structural modification of stem
xylem vessels vascular system element that transport water and dissolved ions up to stems and leaves.
meristem tissue the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place.
Created by: bobolinx