Structure of Calcium Oxalate Monohydrate

Arnott, Howard J.; Pautard, F. G. E.; Steinfink, H.

doi:10.1038/2081197b0

Cited by 41 publications

(18 citation statements)

References 2 publications

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“…Styloids may have pointed or squared ends and the ends in some crystals are roofed by two prisms (Frey-Wyssling 1981) giving a beveled shape to the tips. Styloid crystals are characteristic of some families of Asparagales including Agavaceae, Alliaceae, Convallariaceae, Asphodelaceae, Iridaceae and Xanthorrhoeaceae (Arnott et al 1965; Prychid and Rudall 1999; Wattendorff 1976; 1978). …”

Section: Introductionmentioning

confidence: 99%

New and unusual forms of calcium oxalate raphide crystals in the plant kingdom

2014

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Calcium oxalate crystals in higher plants occur in five major forms namely raphides, styloids, prisms, druses and crystal sand. The form, shape and occurrence of calcium oxalate crystals in plants are species- and tissue-specific, hence the presence or absence of a particular type of crystal can be used as a taxonomic character. So far, four different types of needle-like raphide crystals have been reported in plants. The present work describes two new and unusual forms of raphide crystals from the tubers of Dioscorea polystachya—six-sided needles with pointed ends (Type V) and four-sided needles with beveled ends (Type VI). Both of these new types of needles are distinct from the other four types by each having a surrounding membrane that envelopes a bundle of 10–20 closely packed thin crystalline sheets. The previously known four types of needles have solid or homogenous crystalline material, surrounded by a membrane or lamellate sheath called a crystal chamber. Only the Type VI crystals have beveled ends and the needles of the other five types have pointed ends.

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Section: Introductionmentioning

confidence: 99%

New and unusual forms of calcium oxalate raphide crystals in the plant kingdom

2014

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“…Calcium oxalate crystallizes in plants in two forms of hydrate: a monoclinic monohydrate, or whewellite, and a tetragonal dihydrate, or weddellite (Honegger 1952, Philipsborn 1952, Arnott et al 1965, Sterling 1965 . The latter hydrate is metastabile at physiological temperatures, tending to change gradually into the monohydrate form (Frey 1925).…”

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confidence: 99%

Occurence of calcium oxalate in relation to the activity of fungi in forest litter and humus

Hintikka¹,

Korhonen²,

Näykki³

1979

Karstenia

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“…Microscopy of the powder detected the presence of fragments of unicellular trichomes, stomata, fibers, crystal differ in shape like as regular prismatic shapes, druses shapes, sand crystal shapes and dendritic crystal like as snowflake formation in shape , all the crystal in the plant cell mainly composed of calcium oxalate occur in two chemical forms monohydrate and dihydrate and both of these appear in plants, the monohydrate is more stabilized and is more commonly in plants than dihydrate [19]- [20], " Fig. 6".…”

Section: Resultsmentioning

confidence: 99%

Anatomical study of vegetative parts and Powder microscopy of Cordia myxa L. (Boraginaceae) in Iraq

2016

IJACEBS

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Abstract-This study deals with the anatomical features of Cordia myxa stem, leaf and petiole in Iraq. Peeling method have been clarified anomocytic stomata with anticlinal walls of epidermal cells, the cross sections of lamina shown the unicellular epidermis in abaxial and adaxial surface, unicellular trichomes spread in the epidermis. adaxial covered by thick cuticle, bifacial mesophyll. idioblasts spread through palisade parenchyma, oval to circular shape cells of spongy parenchyma, midrib have large concentric vascular bundle is present at the midrib region and one vascular bundle in above. Petiole shape is square with five vascular bundle appear, the big one located on the central and four vascular bundle located in the corners. The dried leaf powder was brown to green in color, microscopy of the powder showed fragments of unicellular trichomes, stomata, fibers, crystal differ in shape like as regular prismatic, druses, sand crystal, and dendritic crystal like as snowflake formation in shape

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Structure of Calcium Oxalate Monohydrate

Cited by 41 publications

References 2 publications

New and unusual forms of calcium oxalate raphide crystals in the plant kingdom

New and unusual forms of calcium oxalate raphide crystals in the plant kingdom

Occurence of calcium oxalate in relation to the activity of fungi in forest litter and humus

Anatomical study of vegetative parts and Powder microscopy of Cordia myxa L. (Boraginaceae) in Iraq

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