Calcium Oxalate Crystals in Pistils and Stamens of Some Angiosperm Taxa

Özet

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 stamen
of four angiosperm taxa including Sternbergia lutea (L.) Ker-Gawl. Ex Sprengel, Bellevalia edirnensis N. Özhatay & Mathew, Trachelium
jacquinii (sieber) Boiss. subsp. dalgiciorum N. Özhatay & Dane and Cyclamen coum Miller. were investigated with light microscopy using
paraffin 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 of
another development, buds at different phases of microsporogenesis, and microgametogenesis were used. Two types of calcium oxalate
crystals were identified in the examined plants. While raphide crystals were observed in S. lutea and B. edirnensis, druse crystals were
observed in Cylamen coum and T. jacquinii subsp dalgıciorium. At the end of the study, it was concluded that presence and distribution of
calcium oxalate crystals in the pistil and stamen depends on the developmental stages of the male and female organs.