Identification of <i>Dendrobium</i> (Orchidaceae) in Liwa Botanical Garden Based on Leaf Morphological Characters

Abstract

Orchid is one of the most popular ornamental plants in the world. One of the orchid genera that is collected in a large number and known to have high morphological variations in the Liwa Botanical Garden is Dendrobium. However, to date, many Dendrobium collections have not been identified. Given the urgency of identification and the limitations of specimens in the field, especially flower organs, this study is important. This study aims to determine variations in morphological characters, phenetic relationships, and to identify Dendrobium collections based on leaf morphological characters in the Liwa Botanical Garden. Five accessions of Dendrobium were collected, namely CAT140, CAT 144, CAT 271, CAT 274, and IR015. Observation of 11 morphological characters leaves showed that leaf had high variations. The phenetic relationship based on the Gower similarity value and the UPGMA method shows that the Dendrobium in the Liwa Botanical Garden can be classified into 2 main groups formed with a similarity index value of 0.813. Based on Principle Component analysis values, it is known that the characters that have a large influence on grouping are the ratio of leaf length and width, leaf cross section, and leaf arrangement. The phenetic dendrogram topology is supported by the morphological character classification. The results of this study are expected to be basic information in the identification of natural orchids and conservation efforts in the Liwa Botanical Garden.

Study of Orchid Resistance Induction Using Rhizoctonia Against ORSV Infection Based on Anatomical Characters of Roots and Leaves

“…The largest epidermal cell size between the two types of orchids was found in P. amabilis with M treatment. The size and shape of the epidermal cells vary greatly in each species 2,7,11 . Measurements of epidemic cells have been attempted to distinguish closely related species, but differences in epidermal size make them unreliable for distinguishing between species.…”

“…The type of orchid that is most in demand by consumers and dominates the market is Dendrobium, followed by Phalaenopsis 1 . This species is widely enjoyed because of its uniqueness in the form of durable and beautiful flowers, with varied shapes and colors 2 . Until now, infectious diseases are still the main obstacle in orchid cultivation 3,4 , including Odontoglossum ringspot virus (ORSV) 1,5 .…”

Stomata characters of sugarcane (<i>Saccharum officinarum</i> L.) mutants of GMP3 variety at PT Gunung Madu Plantations, Lampung, Indonesia

“…Genetic distance and kinship, as indicated by the coefficient of similarity, are correlated. The closer the kinship between people, the lesser the genetic distance, and the greater the similarity coefficient value (Purnomo et al 2020;Mahfut et al 2021).…”

Molecular Characterization of Mycorrhiza and Its Potential as Biocontrol

“…The moth orchid (Phalaenopsis amabilis L. -Blume) is a native tropical orchid from Indonesia requiring conservation (Sukma et al, 2021). According to their natural habitat, these orchids are decreasing and even threatened to go extinct (Kumalawati et al, 2011;Mahfut et al, 2021a). Therefore, it is crucial to conserve and protect orchid plants from diseases.…”