Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University

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Anatomical Characteristics of Leaf and Petiole and Presence of Calcium Oxalate Crystals in Giant Elephant Ear (Colocasia gigantea (Blume) Hook. f.)

Paper Type	Contributed Paper
Title	Anatomical Characteristics of Leaf and Petiole and Presence of Calcium Oxalate Crystals in Giant Elephant Ear (Colocasia gigantea (Blume) Hook. f.)
Author	Yupadee Paopun, Piyanan Thanomchat and Nustsaba Kronburee
Email	rdiydp@ku.ac.th
Abstract: The genus Colocasia contains mostly calcium oxalate (CaOX), especially found in petioles and leaves. The petioles of C. gigantea are usually consumed by Southeast Asian people for cooking. In addition, fresh petioles together with leaves are utilized as animal feed. This study aims to determine the anatomical characteristics of both parts of the above mentioned to identify characters of CaOX crystals using a compound light microscope, polarized microscope, scanning electron microscope, and energy-dispersive X-ray spectrometer. The results showed that the leaf anatomical characteristics comprise four layers, i.e. the upper and the lower epidermis, mesophyll, and vascular bundles, respectively. The mesophyll layer consists of palisade cells, spongy cells, and air spaces. Besides the idioblast cells also found in the mesophyll. The petiole comprises three layers, i.e. the epidermis, stele (vascular bundle), and cortex where parenchyma cells, air spaces, and idioblast cells exist. The idioblast cells contain a group of raphide (or raphide bundle) of CaOX in the cell. The palisade cells of the leaf and parenchyma cells of the petiole contain other shapes of CaOX crystals such as druse, rectangular prism, hexagonal prism, and octahedron prism. The length and thickness of the raphide crystals bundle are 60.40-67.50 μm and 26.00-30.90 μm, respectively. The length and thickness of needle-like crystals are 20.80- 67.30 μm and 0.86-1.04 μm, respectively. The diameter of crystals in a druse form is 25.70-30.60 μm. The small crystals appear in three forms, i.e. rectangular, hexagonal, and octagonal prism. The length, width, and thickness of crystals are 3.57-6.57 μm, 1.11-2.05 μm, and 0.33-2.61 μm, respectively. The EDS X-ray spectra and maps analyzed from the crystals found the elements of calcium (Ca) and oxygen (O).
Graphical Abstract:
Article ID	e2025016
Received Date	2024-08-28
Revised Date	2025-01-22
Accepted Date	2025-02-26
Keyword	Giant Elephant Ear, Colocasia gigantea, anatomical, calcium oxalate, SEM, LM, EDS, X-ray mapping
Volume	Vol.52 No.2 In progress (March 2025). This issue is in progress but contains articles that are final and fully citable.
DOI	https://doi.org/10.12982/CMJS.2025.016
Citation	Paopun Y., Thanomchat P. and Kronburee N., Anatomical Characteristics of Leaf and Petiole and Presence of Calcium Oxalate Crystals in Giant Elephant Ear (Colocasia gigantea (Blume) Hook. f.), Chiang Mai Journal of Science, 2025; 52(2): e2025016. DOI 10.12982/CMJS.2025.016.
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Performance of Giant Freshwater Prawn (Macrobrachium rosenbergii de Man) Reared in Earthen Ponds Beneath Plastic Film Shelters
page: 89 - 96
Author:Niwooti Whangchai, Thepparath Ungsethaphand, Chanagun Chitmanat, Kriangsak Mengumphan and Supattra
Vol.34 No.1 (JANUARY 2007) View: 617 Download:226

FESEM Analysis of BPSG Films After Reflow
page: 35 - 46
Author:Uda Hashim, Nik H.N. Hamat, and Ramzan M. Ayab
Vol.34 No.1 (JANUARY 2007) View: 628 Download:258

Analysis of Intact Glucosinolates in Thai Broccoli Seeds
page: 223 - 230
Author:Sarunya Chuanphongpanich*[a], Duang Buddhasukh [b], Pichai Pirakitikulr [b] and Sukon Phanichphant
Vol.33 No.2 (MAY 2006) View: 637 Download:252

Antioxidant Capacity of Broccoli Seeds Grown in Thailand
page: 117 - 122
Author:Sarunya Chuanphongpanich* [a], Maitree Suttajit [b], Sukon Phanichphant [c Duang Buddhasukh [c]
Vol.33 No.1 (JANUARY 2006) View: 660 Download:194

Stanol Synthesis from Palm Oil Distillate
page: 109 - 116
Author:Sarunya Chuanphongpanich* [a], Nipon T uwanon [a], Duang Buddhasukh [b], Pichai Pirakitik
Vol.33 No.1 (JANUARY 2006) View: 681 Download:199

Pressure-Temperature Estimates of the Metamorphosed Sedimentary Rocks on the Eastern Side of Khao Phai, Immediate West of Ban Choeng Chai, Wang Pong, Phetchabun Province, Thailand
page: 283 - 293
Author:Yuenyong Panjasawatwong, Boontarika Srithai and Udomporn Wipakul
Vol.35 No.2 (MAY 2008) View: 659 Download:202

Thermoelectric P Proper roper roperties ties of Antimony T Telluride elluride Thin Films ilms Deposited using R R..F F. . Magnetron Sputtering
page: 459 - 464
Author:Kandasamy andasamy andasamy, , S S*., ., P Pachoud, achoud, D., Holland, A., K Kalantar alantar alan
Vol.32 No.3 (SEPTEMBER 2005) View: 617 Download:253

Urbach Energy of Hexagonal ZnO and Mg 0.05 Zn 0.95 O Thin Film Grown by RF Sputtering
page: 453 - 458
Author:Sornchai T anunchai, Sripen T owta, Nik orn Mangk orntong, P ongsri Mangk orntong and Supab
Vol.32 No.3 (SEPTEMBER 2005) View: 623 Download:235

Dynamic Pyroelectric Properties of La-Doped PbTiO 3 Thin F ilms with V arious L a Concentrations
page: 343 - 349
Author:Yung Sup Y oon
Vol.32 No.3 (SEPTEMBER 2005) View: 595 Download:199

Effect of Deposition Time Towards the Properties of Nickel Sulfide Thin Films Prepared in the Presence of Sodium Tartrate as a Complexing Agent
page: 121 - 126
Author:Anuar Kassim* [a], Zulkarnain Zainal [a], Saravanan Nagalingam [b] and Zuriyatina Abdullah [a]
Vol.32 No.2 (MAY 2005) View: 637 Download:198

Synthesis of Cocoa Butter Equivalent from Palm Oil by Carica papaya Lipase-Catalyzed Interesterification
page: 359 - 368
Author:Porntippa Pinyaphong, and Suree Phutrakul
Vol.36 No.3 (SEPTEMBER 2009) View: 1,093 Download:225

Methods for Modeling Incidence Rates with Application to Pneumonia Among Children in Surat Thani Province, Thailand
page: 29 - 38
Author:Noodchanath Kongchouy, Chamnein Choonpradub, and Metta Kuning
Vol.37 No.1 (JANUARY 2010) View: 623 Download:193

Co-Semisimple Modules and Multiplication Modules
page: 31 - 33
Author:Phannika Leksing and Jintana Sanwong*
Vol.29 No.1 (APRIL 2002) View: 644 Download:220

Sintering Behaviour of Lanthanum Magnesium Niobate Ceramics
page: 125 - 130
Author:Supon Ananta
Vol.28 No.2 (DECEMBER 2001) View: 594 Download:204

Retention Behavior of Aromatic Amines with Some Ionic Liquids Mobile Phase in Semi-micro HPLC
page: 384 - 396
Author:Yuppadee Nusai, Hitoshi Koizumi, Masaki Tachibana, Kazue Tani, and Nobutoshi Kiba
Vol.37 No.3 (SEPTEMBER 2010) View: 681 Download:211

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Anatomical Characteristics of Leaf and Petiole and Presence of Calcium Oxalate Crystals in Giant Elephant Ear (Colocasia gigantea (Blume) Hook. f.)

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