Transport in Plants (2.21-2.24)

Lignin

Lignin

________ deposited in the cells to kill xylem cells.

amino acids

Many plants do not have leaves during the winter, so dissolved sucrose and ________ can be transported from storage organs to other parts of the plant.

Translocation

________: Movement of sucrose and amino acids in the phloem from the source to the sink.

Phloem

________: Transports ‘ food (sucrose and amino acids) made by photosynthesis from phtosynthesisng region to non photosynthesisng region source → sink (bidirectional)

Transpiration

________ produces a tension or ‘ pull on the water in the xylem vessels by the leaves.

Higher humidity results

________ in a lower concentration gradient and thus reduces diffusion rate, which in turn, reduces transpiration rate.

Xylem

________: Transports water and mineral ions.

Xylem Cells

________ are hollow and joined together end to end to form a continous tube.

Higher temperatures

________ result in faster moving molecules and therefore increases diffusion rate, which in turn, increases transpiration rate.

Root hair cells

________: Single celled extension in the epidermis.

Water molecules

________ are attracted to each other by cohesion- creating a continuous column of water up the plant.

Transpiration

________: Loss of water vapor from the leaves by evaporaation of water on the surface of the mesophyll followed by diffusion down a concentration gradient through the stomata.

Xylem

Transports water and mineral ions

Phloem

Transports ‘food (sucrose and amino acids) made by photosynthesis from phtosynthesisng region to non photosynthesisng region source → sink (bidirectional)

Root hair cells

Single celled extension in the epidermis

Transpiration

Loss of water vapor from the leaves by evaporaation of water on the surface of the mesophyll followed by diffusion down a concentration gradient through the stomata

Water molecules are attracted to each other by cohesion

creating a continuous column of water up the plant

Wilting

More water evaporated from leaves than water absorbed from soil

Translocation

Movement of sucrose and amino acids in the phloem from the source to the sink

Source

region of production

Sink

Region of storage or use