The plant life history also involves the “alternations of generations” that allows a plant to undergo meiotic/mitotic phases between the saprophyte(diploid) ND commemorate(haploid) generation. In leaves, gas exchange occurs through little pores called the stomata which are present in the saprophyte generation. These small openings are light sensitive, so they are most commonly located on the bottom of leaves to prevent dehydration.
The stomata usually open in the morning, and close in the night in CO and CO plants. Although, many plants species are different when you compare their stomata orientation. One of the two major groups of flowering plants(angiosperms) are monocots, which include palms. These trees have adapted to harsh, dry environments. The deep roots of a palm tree allow it to reach far below the soil and obtain the necessary water and minerals stored at the bottom, and to help it grow.
Its giant sized leaves allows for maximum sunlight exposure and its waxy surface cuticle of its leaves prevent the large loss of water from leaf due to transpiration. For the lab, I observed six leaves collected from six different plants growing sporadically around the school campus. Using clear tape, sticking it to the bottom of each leaf, applying pressure, and carefully peeling the tape off for an imprint f the leaf. I stuck the tape onto a glass slide and placed it under the microscope and observed the cells.
Adjusting the magnification down xx, it is noticeable that the stomata were open since it was early morning to collect any moisture, sunlight, and oxygen in the air. Thus, narrowing down the plants to be either CO or CO plants since CAM plants only open their stomata at night. Plant species 1 had mesosphere cells surrounding the stoma were which were formed in parallel layers, similar to the visual on page 128, leading to conclude that it was CO. Plant pieces 2 had mesosphere cells that were again, arranged in parallel layers so another CO plant.
Plant species 3 is also a CO. Plant species number 4 is also the same. Oh, but plant species 5 is differently arranged, the mesosphere cells are more concentric around the bundle sheath cells, therefore, it being a CO plant. Plant species 6 has the same mesosphere cell pattern as plant species 5 so it is also a CO plant. When I got a sample of a palm tree leaf imprint, the mesosphere cells are well-formed and arranged in parallel layers just like Plant species 1, 2, and 3 o a palm tree is a CO plant.
In conclusion, most of the leaves were similar but when observed more closely their differences are more obvious. Some plants had more stomata than the other although they were found on the same part of the leaves. This is most likely due to the fact that each plant has a specific amount of nutrients they need to be well nourished in order to survive. When you compare normal leaves to an actual plant like the palm tree that adapted to Florist’s hot environment, there was significantly more stomata all around the not-so broad leaves.