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Flashcards in Transport in Plants Deck (26):
1

What is the Xylem made up of?

Vessel elements
Has : water proof walls lined with lignin, no end walls, pits with no lignin, no organelles, no cell content

2

What is the xylem function?

transport of water up the plant

3

How is Water moved?

The transpiration stream

4

What blocks the apoplast pathway?

Casparian strip

5

What is the phloem made of?

sieve tube elements and companion cells

6

What surrounds the xylem and what does it do?

Parenchyma which acts as a food store

7

In the stem is the phloem on inside or outside?

OUTSIDE

8

In the root is xylem inside or outside?

Inside

9

In the leaves is xylem on bottom or top?

Top

10

What is the phloem and xylem called?

Vascular bundles

11

What is phloem function?

Transport assimilates through translocation

12

What is the structure which acts a filter between sieve tube elements?

Sieve plate

13

What joins sieve tube elements to companion cell?

Plasmodesmata

14

What are the roles of water in a plant?

Hydrostatic Skeleton
Turgor help cell expansion
Cooling
Transport of minerals

15

How is root hair cell adapted for transport?

Very Small
Large SA
Thin surface layer
High concentration in cytoplasm so water move in

16

Which pathway moves through cytoplasm?

Symplast

17

Where does the apoplast way move through?

Through cell walls by cohesive forces

18

How does water move through symplast pathway?

The increases water potential in adjacent cells creates movement of water

19

Which blocks journey from root hair cell to xylem?

The endodermal cells which have a casperian strip made of suberin

20

How do the endodermal cells create movement into xylem?

Use AT to pump ions into xylem to have high water potential

This can be shown by applying cyanide to root tip which inhibit mitochondria and therefor AT as root pressure dissapear

21

Describe movement into leaves?

The water evaporate from cell wall to air spaces
Stomata open so water diffuse out down gradient with

22

Describe one specialisation of phloem?

Has many mitochondria in companion cells
Many plasmodesmata

23

What features of a xerophyte reduce loss of water vapour?

Thick waxy cuticle
Reduced SA available for water loss
Hairs of epidermis as create humidity which reduces water potential gradient as there is a high water potential
Sunken stomata

24

What is a xerophyte?

A plant adpated to live in dry conditions

25

What is a hydrophyte

A plant adapted to live in wet conditions

26

How is a hydrophyte adapted to survive in wet conditions

Leaves have large SA to maximise surface area for photosynthesis
Stomata are only on upper side of leaf and surrounded by waxy cuticle to keep them open
Aerenchyma tissue allow diffusion of oxygen or aerial bits of plants to roots