Foliar stomata characteristics of tree species in a university green open space

Abstract

Abstract. Susilowati A, Novriyanti E, Rachmat HH, Rangkuti AB, Harahap MM, Ginting IM, Kaban NS, Iswanto AH. 2022. Foliar stomata characteristics of tree species in a university green open space. Biodiversitas 23: 1482-1489. Stomata, a gas regulatory system of leaves, provide a great chance to investigate the interaction between plants and their environment. Stomata consist of surrounded by two guard cells. Stomata are found in all parts of the plant that are exposed to the air, especially the leaves. In identifying a plant species, it is necessary to have epidermal characteristics such as stomata to complete the taxonomic data. Several studies have been conducted on the type of stomata on the leaves of some dicotyledonous and monocot plants, but not many have reported similar studies on green space. Universitas Sumatera Utara (USU) campus also plays an important function as green space (GS) in Medan City due to its richness in tree collection number and species. In line with the effort in o maximizing the role of trees as the core element of green space, exploring the characteristics of stomata is important to conduct. Therefore, this study aimed to analyze the leaf stomata characteristics of several tree species in the green open space of the USU campus. A total of 83 tree species were taken for their leaves to investigate the stomata characters. Three healthy mature leaves on the lower part of newly grown branches were collected from each plant. The replica and the nail polish method were employed for stomata slice making. The stomata type, length, wide, density and distribution were observed. The result showed that 83 tree species in the USU campus have varied stomata types, with the percentage were highest characteristic found in paracytic (91.46%), followed by anomocytic (6.02%), anisocytic (1.20%), and diacytic (1.20%). The longest stomata were observed in Antidesma bunius (32.04 ????????). The widest stomata were noticed in Garcinia mangostana (37.62 ????????). Meanwhile, the shortest and narrowest stomata were found in Shorea laevis, which were 5.43 ???????? and 3.72 ????????, respectively. The species with the highest stomatal density was Schleichera oleosa (4294 mm-2). According to the study, the tree species at USU generally have high stomata density, length, and width, making them more suitable for green space. Species with a high number and density of stomata and a large size are much more likely to adsorb pollutants such as carbon monoxide.

Effect of Benzyl Amino Purine (BAP) on the Leaf Growth of Vanda limbata Blume Orchid In Vivo

“…The stomatal density of V. limbata in all treatments is considered low. This is in line with the report of Susilowati et al (2022) that stomata are categorized into 3 based on their density, which are low density (< 300 mm -2 ), medium density (300 to 500 mm -2 ) and high density (> 500 mm -2 ). Low stomatal density Figure 3.…”

Comparative Study on Leaf Anatomy in Selected Garcinia Species in Peninsular Malaysia

“…mangostana complements the finding from the previous research done by Priya and Hari (2019). Hypostomatous and paracytic stomata were also reported on Garcinia brasilliensis (Cardoso et al, 2013), Garcinia cambogia (Sreelakshmi et al, 2014), Garcinia zhangpuensis (Wang et al, 2018), Garcinia dulcis (Begum, 2020), and Garcinia atroviridis (Susilowati et al, 2022). These findings supported the evidence that these two features of stomata are common in the Garcinia genus (Pathirana & Herat, 2004) and the Clusiaceae family (Metcalfe & Chalk, 1950).…”

Taxonomic Significance of Leaf Micromorphology in Selected Garcinia from Peninsular Malaysia

“…The widest stomata (37.62 µm) of G. mangostana var. mangostana was also reported in the previous study [16]. An important character such as stomata is purposely identified to define and classify species within the Garcinia taxa.…”

“…Paracytic stomata are common in Garcinia genus [15] and Clusiaceae family [1]. A previous study found the highest occurrence of paracytic stomata (91.46%) was observed in plant species, particularly Garcinia atroviridis followed by anomocytic (6.02%), anisocytic (1.20%), and diacytic (1.20%) in 83 trees species studied in green open space located in Universitas Sumatera Utara (USU) campus [16]. Other Garcinia species, Garcinia pedunculata, Garcinia lanceifolia, Garcinia morella and Garcinia xanthochymus exhibited a similar paracytic stomatal type [17].…”