Transport in flowering plants

Name: __________________ Topic: Transport in flowering plants LO:Identifythepositionsandexplainthefunctionsofxylemvessels,phloem(sievetubeelementsand companioncells)in sectionsof a herbaceousdicotyledonous leaf and stem, using the light microscope Concepts Summary NotesNan Hua High School Biology 1

Name: __________________ Topic: Transport in flowering plants ● Function of xylem:Transports water and mineral saltsfrom roots to leaves (nonucleus and no protoplasm)● Function of phloem:Transports sucrose and amino acidsfrom the leaves to thestorage organs and other parts of the plant Xylem vesselConcepts Summary NotesNan Hua High School Biology 2

Name: __________________ Topic: Transport in flowering plants ● Thick,lignifiedcell wall: strengthensthe vesselandpreventsplantfromcollapsing, provides mechanical support.● Narrow, hollow, longlumenwithnocrosswall: Forfastertransportationofwaterand mineral saltsfrom roots to leaves. Phloem ● Sieve tube elements: Allowrapid transport of sucroseand amino acidsdue tolittle protoplasm and a continuous column (no nucleus)● Companion cells:Release energyneeded fortranslocationofsucrose and aminoacidsdue topresence of numerous mitochondria Concepts Summary NotesNan Hua High School Biology 3

Name: __________________ Topic: Transport in flowering plants Functions of xylem and phloem:Similarities:• Xylem and phloem bothtransport substances/materialsto different parts of theplant.• Xylem and phloem bothtransport substances as a solutionto different parts ofthe plant. Differences:• Xylemtransports water and mineral saltswhile phloemtransports sucrose andamino acids.• Xylem transports water and mineral salts inone directionup the plantwhilephloem transports sucrose and amino acids inbothdirections.• Xylem transports water and mineral saltsfrom theroots to the leaveswhilephloem transports sucrose and amino acidsfrom theleaves to other parts of theplant.• Xylem transports water and mineral salts byroot pressure,transpiration pull andcapillary actionwhile phloem transports sucrose andamino acids bypressureflowas a result ofloading sucrose into the phloemviaactive transport. Concepts Summary NotesNan Hua High School Biology 4

Name: __________________ Topic: Transport in flowering plants LO:Relatethestructureandfunctionsofroothairstotheirsurfacearea,andtowater and ion uptake Structure FunctionLong and na