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Flashcards in Lab 6 Deck (27)
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1

without the cuticle and -- the leaf would dry out within a few hours, like a piece of paper, whenever soil moisture becomes low and the roots cannot supply water rapidly enough

closed stomates

2

stomates are the -- line of defense

last

3

stomates open when water supply and other environmental conditions are suitable and permit the rapid entry of

CO2

4

Experiment 1: measure the rate of water loss from plant leaves by -- and diffusion out of stomates

evaporation

5

-- will provide info on water loss per unit time (ml H2O minute -1)

potometer

6

Experiment 1 species

native CA shrub Heteromeles arbutifola (Rosaceae)

7

Experiment 1: keep the -- end moist and not to cover it with parafilm

cut end

8

purpose of parafilm is to make a -- between the tubing and the stem

good seal

9

how to tell if the seal is good if...

the water will not leak out

10

If you see any leaks, remove the plant from the photometer and --

wrap more parafilm around the stem

11

read from the -- part of the meniscus

convex

12

Experiment one last setting:

hot wind may damage leaves

13

transpiration = difference in --

water volume in potometer

14

Experiment 2

stomatal density and size

15

# of stomates

10-several thousand

16

stomates on upper and lower leaf epidermis

amphistomatous

17

stomates on lower leaf epidermis

hypostomatous

18

species that have large stomates typically have --

fewer per mm^2

19

Experiment 2: avoid leaves with --

trichomes

20

Experiment 2: avoid fields including a --

vein

21

stomatal density

# of stomata/area of FOV

22

bamboo (poaceae), palms, barley

monocots

23

Fiscus racemosa, Macadamia integrifolia

Dicots

24

podocarpus species, Gingko biloba

gymnosperms

25

tree ferns, polypods, Adiantum

fern

26

leaf size can vary 10,000 fold across species and shows adaptation and plasticity in response to many factors such as light, herbivory, nutrients, and --

water availability

27

best known biogeographic trend in plant form is for leaves to be -- in drier areas

smaller