Calcium Oxalate Crystals in Pistils and Stamens of Some Angiosperm Taxa

Calcium oxalate crystals that are present in almost all parts of the angiosperms have different morphological forms: as druses, prism,styloids, raphides and crystal sand. In the present study, occurrence, types and distribution of calcium oxalate crystals in the pistil and stamenof four angiosperm taxa including Sternbergia lutea (L.) Ker-Gawl. Ex Sprengel, Bellevalia edirnensis N. Ozhatay & Mathew, Tracheliumjacquinii (sieber) Boiss. subsp. dalgiciorum N. Ozhatay & Dane and Cyclamen coum Miller. were investigated with light microscopy usingparaffin and handmade sections. During the study, special attention was given to reveal the presence and absence of crystals in the stigma,style, ovary, anther and filament at different developmental stages of the pistil and stamen. To observe the crystals at different stages ofanother development, buds at different phases of microsporogenesis, and microgametogenesis were used. Two types of calcium oxalatecrystals were identified in the examined plants. While raphide crystals were observed in S. lutea and B. edirnensis, druse crystals wereobserved in Cylamen coum and T. jacquinii subsp dalgiciorium. At the end of the study, it was concluded that presence and distribution ofcalcium oxalate crystals in the pistil and stamen depends on the developmental stages of the male and female organs.

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