Presentation exp 2 bot
- 1. BACHELOR’S BUTTON: RATE OF TRANSPIRATION
- 2. CENTAUREA CYANUS more commonly known as “Bachelor’s button” or “Cornflower” annual flowering plant belonging to the Asteraceae family this herb easily cultivated in a wide variety of soils The flowers are hermaphrodites, meaning they have male and female organs, and are pollinated with the help of other organisms such as insects.
- 4. FRIST COLLECTION Date Whole plant Age of Plant Organ Length Weight Width Length Weight Dry weight Leaf 5.7 cm 0.43g 1.2cm Stem 0.6cm 0.010g 0.3cm 10cm 0.43g 0.05g Root 4 cm 0.001g 0.3cm
- 5. SECOND COLLECTION Date Age of Plant Organ Length Weight Width Whole plant Leaf 6.3cm 0.50g 0.7cm Length Weight Dry weight Stem 0.7 cm 0.020g 0.3cm 11cm 0.62g 0.07g Root 4.2cm 0.06g 0.3cm
- 7. THIRD COLLECTION Date Age of Plant Organ Length Weight Width Whole plant Leaf 9.5cm 0.86g 0.7cm Length Weight Dry weight Stem 1.5cm 0.08g 0.5cm 14.3cm 1.37g 0.17g Root 4.1 cm 0.21g 0.4cm
- 9. FOURTH COLLECTION Date Whole plant Age of Plant Organ Length Weight Width Length Weight Dry weight Leaf 13cm 2.50g 0.9cm Stem 6.4cm 0.40 g 0.5cm 27.2cm 3.28g 0.23g Root 8cm 0.29g 0.6 cm
- 10. CROSS SECTION
- 11. FIFTH COLLECTION Whole plant Date Age of Plant Organ Length Weight Width Length Weight Dry weight Leaf 19cm 6.97g 1.5cm Stem 5cm 0.61g 0.6cm 37.8cm 9.93g 0.42g Root 14 cm 1.73g 1 cm
- 12. CROSS SECTION
- 13. TRANSPIRATION Plant transpiration is the release of water vapor to the atmosphere through the stomata. Approximately 10% of all moist found in the atmosphere is released by transpiration many external factors contribute to the rate of transpiration in organisms. Humidity and air movement have a close relationship in terms of affecting the rate of transpiration in plants
- 14. MATERIALS AND METHODS A potometer, or transpirometer was utilized. A fan was added as a the variable The stem was cut and connected to the tube. The pipette was filled with water Every three minutes, pipette was measured
- 15. RESULTS According to the observations made during the experiment Plant B, containing the variable (wind), as shown in figure 1, show a wide range of transpiration while the control shows not transpiration at all.
- 16. TABLE 1: AVERAGE VALUES OF ABSORBED WATER Time (minutes) Control (without breeze) Experimental (with breeze) 0 0.8975 0.8460 3 0.8950 0.8445 6 0.8973 0.8440 9 0.8970 0.7985 12 0.8970 0.7875 15 0.8970 0.7968 18 0.8968 0.7960 21 0.8965 0.7948 24 0.8965 0.7935 27 0.8965 0.7925 30 0.8960 0.7440
- 17. AVERAGE VALUES OF ABSORBED WATER Average values of absobed water 0.95 0.9 Pipet measuments (mL) 0.85 0.8 0.75 0.7 0 3 6 9 12 15 18 21 24 27 30 Time (minutes) Control (without breeze) Experimental (with breeze) Pipet measurements are inversely proportional to the amount of water transpired.
- 18. DISCUSSION Table 1 demonstrated that after six minutes the experimental plant absorbed more quantities of water that the control plant. Wind carries away the humid air over the plant’s surface, this increases the rate of water evaporation, which increases the rate of transpiration.
- 19. Increase air circulation increase the rate of transpiration. The hypothesis of this investigation was proven to be true because the environmental factor, wind, did in fact increase the rate of transpiration of the Centaurea cyanus plant