Artefactual Suboptimal Fixation Effect to Nuclear Staining on Erythrocytes of Lutjanus kasmira (Forsskål 1775)

Huu-Quyet Do (Institute of Tropical Ecology, Vietnam-Russia Tropical Center, 63 Nguyen Van Huyen, Nghia Do Ward, Cau Giay District, Hanoi, Vietnam)
Van-Thanh Vo (Biology Faculty, Ho Chi Minh City University of Education, 280 An Duong Vuong, Ward 4, District 5, Ho Chi Minh, Vietnam)
Nguyen Thi Le-Na (Faculty of Biology, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam)
Hoang Thi Thuy-Duong (Institute of Tropical Ecology, Vietnam-Russia Tropical Center, 63 Nguyen Van Huyen, Nghia Do Ward, Cau Giay District, Hanoi, Vietnam)

HAYATI Journal of Biosciences
Vol. 30 No. 1 (2023): January 2023

This research presents the unusual staining characteristic of the teleosts red blood cells–the common bluestripe snapper Lutjanus kasmira, caught at Toc Tan (Allison) Reef, Truong Sa Archipelago, Vietnam, due to side effects of the delayed staining procedure. In addition to the quantitative data measured, the results of microscopic image research showed that, on slides performed with the delayed Romanovsky staining procedure using Giemsa dye, the cell "nucleus" was not dye-stained as seen in the erythrocytes of much other fish. The AFM and SEM images of blood slides show that the structure of the nuclear zone and the nuclear membrane was destroyed. Although methanol is used as one of the common fixatives in biology, the delayed staining still causes artifactual side effects, disrupts the structure of the red blood cell nucleus and can cause confusion when studying cytogenetics.