Stomata Density of Orchids and Cloud Forest Humidity - OJS at [PDF]

This experiment compares stomata density of the epiphytic Pleurothallis aristata and. Maxillaria sp. orchids under exper

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Oregon Undergraduate Research Journal 3.1 (2012) ISSN: 2160-617X (online) http://journals.oregondigital.org/ourj/ DOI: 10.5399/uo/ourj.3.1.2386

Stomata Density of Orchids and Cloud Forest Humidity Sierra Predovich*, Environmental Studies Program ABSTRACT This experiment compares stomata density of the epiphytic Pleurothallis aristata and Maxillaria sp. orchids under experimental conditions of dry and humid environments. Pleurothallis aristata is in the sub-tribe Pleurothallidinae and lacks pseudobulbs, while Maxillaria sp. has pseudobulbs. The study seeks to determine what differences in stomata density exist between the two species, and if there is a difference in mean percent stomata open in humid and dry environments. The study takes stomata impressions from the leaves of twenty individuals of each species using clear nail polish. The results show a significant difference in stomata density between the Pleurothallis aristata and the Maxillaria sp. (Rank Sum Test: t=55, n1=10, n2=10, p

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