Three closely related species of genus Clusia are found in moist forests, dry deciduous forests and dry rocky coast of Trinidad island. In order to study their physiological response, they were raised under identical conditions in growth chambers.
For one of these species, measurements were made under well-watered conditions (0 day) and after 5 days and 10 days without further irrigation. The results are shown :
Graph with hollow circles is response of young leaves while solid line indicates mature leaves of the same plant.
State whether each of the following statements is true (T) or false (F).
a. Young leaves are unable to fix CO2 in the night of 0 day while the mature leaves followed CAM pathway. ________
b. Peak indicated as “P” in the graph is result of activation of “RUBISOCO” enzyme. ________
c. Young leaves are utilizing C3 pathway in the beginning of the experiment and then progressively assimilate CO2 by CAM pathway. ________
d. The response shown in the graph is most likely of a species that grows in moist forest. ________
a. Young leaves are unable to fix CO2 in the night of 0 day while the mature leaves followed CAM pathway. True
b. Peak indicated as “P” in the graph is result of activation of “RUBISOCO” enzyme. False
c. Young leaves are utilizing C3 pathway in the beginning of the experiment and then progressively assimilate CO2 by CAM pathway. True
d. The response shown in the graph is most likely of a species that grows in moist forest. False