Morphological and micromechanical characterization of calcium oxalate (CaOx) crystals embedded in the pecan nutshell (Carya illinoinensis)

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Abstract

© 2018 The morphology and micromechanical properties of the mineral crystals embedded in the pecan nutshell (Carya illinoinensis) were characterized. Qualitative and quantitative morphological analyses carried out revealed that the crystals were comprised of calcium oxalate (CaOx) and have a wide range of sizes, with prismatic shapes, distributed heterogeneously in the sclerenchyma tissue. From indentation tests, it was found that CaOx crystals are stiffer structures compared to stone cells (sclerenchyma tissue), showing hardness and elastic modulus values of 0.53 ± 0.19 GPa and 9.4 ± 1.80 GPa, respectively. Additionally, the values of fracture toughness (0.08 ± 0.02 MPa m0.5) and the brittleness index (9336 m−0.5) revealed that these types of structures are extremely brittle. The results obtained suggest that the main function of the CaOx crystals is to provide structural support to tissue. The presented methodology demonstrates the potential of the instrumented indentation technique (IIT) for in situ micromechanical characterization of mineral crystals located in plant tissues.
Original languageAmerican English
Pages (from-to)566-570
Number of pages508
JournalPlant Physiology and Biochemistry
DOIs
StatePublished - 1 Nov 2018

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Carya
Carya illinoinensis
Calcium Oxalate
calcium oxalate
pecans
crystals
Calcium
Crystals
Tissue
sclerenchyma
Minerals
Indentation
Elastic Modulus
Hardness
minerals
Brittleness
modulus of elasticity
hardness
plant tissues
Fracture toughness

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@article{3879360d44314b5a86085758c49eda17,
title = "Morphological and micromechanical characterization of calcium oxalate (CaOx) crystals embedded in the pecan nutshell (Carya illinoinensis)",
abstract = "{\circledC} 2018 The morphology and micromechanical properties of the mineral crystals embedded in the pecan nutshell (Carya illinoinensis) were characterized. Qualitative and quantitative morphological analyses carried out revealed that the crystals were comprised of calcium oxalate (CaOx) and have a wide range of sizes, with prismatic shapes, distributed heterogeneously in the sclerenchyma tissue. From indentation tests, it was found that CaOx crystals are stiffer structures compared to stone cells (sclerenchyma tissue), showing hardness and elastic modulus values of 0.53 ± 0.19 GPa and 9.4 ± 1.80 GPa, respectively. Additionally, the values of fracture toughness (0.08 ± 0.02 MPa m0.5) and the brittleness index (9336 m−0.5) revealed that these types of structures are extremely brittle. The results obtained suggest that the main function of the CaOx crystals is to provide structural support to tissue. The presented methodology demonstrates the potential of the instrumented indentation technique (IIT) for in situ micromechanical characterization of mineral crystals located in plant tissues.",
author = "J. Nicol{\'a}s-Berm{\'u}dez and I. Arzate-V{\'a}zquez and Chanona-P{\'e}rez, {J. J.} and M{\'e}ndez-M{\'e}ndez, {J. V.} and Rodr{\'i}guez-Castro, {G. A.} and H. Mart{\'i}nez-Guti{\'e}rrez",
year = "2018",
month = "11",
day = "1",
doi = "10.1016/j.plaphy.2018.10.008",
language = "American English",
pages = "566--570",
journal = "Plant Physiology and Biochemistry",
issn = "0981-9428",
publisher = "Elsevier Masson SAS",

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TY - JOUR

T1 - Morphological and micromechanical characterization of calcium oxalate (CaOx) crystals embedded in the pecan nutshell (Carya illinoinensis)

AU - Nicolás-Bermúdez, J.

AU - Arzate-Vázquez, I.

AU - Chanona-Pérez, J. J.

AU - Méndez-Méndez, J. V.

AU - Rodríguez-Castro, G. A.

AU - Martínez-Gutiérrez, H.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - © 2018 The morphology and micromechanical properties of the mineral crystals embedded in the pecan nutshell (Carya illinoinensis) were characterized. Qualitative and quantitative morphological analyses carried out revealed that the crystals were comprised of calcium oxalate (CaOx) and have a wide range of sizes, with prismatic shapes, distributed heterogeneously in the sclerenchyma tissue. From indentation tests, it was found that CaOx crystals are stiffer structures compared to stone cells (sclerenchyma tissue), showing hardness and elastic modulus values of 0.53 ± 0.19 GPa and 9.4 ± 1.80 GPa, respectively. Additionally, the values of fracture toughness (0.08 ± 0.02 MPa m0.5) and the brittleness index (9336 m−0.5) revealed that these types of structures are extremely brittle. The results obtained suggest that the main function of the CaOx crystals is to provide structural support to tissue. The presented methodology demonstrates the potential of the instrumented indentation technique (IIT) for in situ micromechanical characterization of mineral crystals located in plant tissues.

AB - © 2018 The morphology and micromechanical properties of the mineral crystals embedded in the pecan nutshell (Carya illinoinensis) were characterized. Qualitative and quantitative morphological analyses carried out revealed that the crystals were comprised of calcium oxalate (CaOx) and have a wide range of sizes, with prismatic shapes, distributed heterogeneously in the sclerenchyma tissue. From indentation tests, it was found that CaOx crystals are stiffer structures compared to stone cells (sclerenchyma tissue), showing hardness and elastic modulus values of 0.53 ± 0.19 GPa and 9.4 ± 1.80 GPa, respectively. Additionally, the values of fracture toughness (0.08 ± 0.02 MPa m0.5) and the brittleness index (9336 m−0.5) revealed that these types of structures are extremely brittle. The results obtained suggest that the main function of the CaOx crystals is to provide structural support to tissue. The presented methodology demonstrates the potential of the instrumented indentation technique (IIT) for in situ micromechanical characterization of mineral crystals located in plant tissues.

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