Plant Transport Investigation
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Plant Transport Investigation pete hamilton sandringham college
description
Plant Transport Investigation. pete hamilton sandringham college. Transpiration. Translocation. Radioactive counts using wood and bark pieces after application of radioactive 42 K + to seedling roots. 40. 40. 40. 35. 55. 45. Disrupts Phloem. 60. 70. 75. 100. 100. source. - PowerPoint PPT Presentation
Transcript of Plant Transport Investigation
Plant Transport Investigation
pete hamilton sandringham college
Transpiration Translocation
Average Growth (mm)
Days after Treatment
Control Ringed Defoliated Ringed & Defoliated
3 94 71 36 14
5 164 130 80 16
9 341 218 270 20
1 2 30
50
100
150
200
250
300
350
400
94
164
341
71
130
218
36
80
270
14 16 20
Control
Ringed
Defoliated
Ringed & Defoliated
Days after Treatment
Average Growth mm
Plant Transport in Vascular Tissue
Radioactive counts using wood and bark pieces after application of radioactive 42K+to seedling roots
Average number of countsInternode number
Control plant Ringed plant
Wood Bark Wood Bark
6 70 30 75 35
5 90 50 85 50
4 115 60 110 65
3 125 65 Ring Ring
2 135 65 150 75
1 180 80 200 90100
55
60
70
40
40
source source
100
75
45
35
40
Disrupts Phloem
Photosynthesis resulting in radioactive
carbohydratesb
Transpiration
Blocked stomata prevent intake of radioaactive CO2
No radioactive CO2 in veins or under BS
Radioactive phosphate + water in veins
No radioactive phosphate under
the BS as water vapour cannot
escape thro the stomata
The Effect of Blocking Stomata
Stomata – pores in the epidermis allow movement of gases into and out of the leaf tissue. Guard cells open and close these pores to aloow gaseous exchange without excessive water loss.
Open when Turgid Ie. water available
Closed when flaccid
Ie.less water available
