Morphological Note of Zygnema cruciatum (Zygnemataceae, Chlorophyta) in Korea

doi:2009.24.2.57

Algae > Volume 24(2); 2009 > Article

Algae 2009;24(2): 57-60. doi: https://doi.org/10.4490/algae.2009.24.2.057

Jee-Hwan Kim¹^* and Young Hwan Kim²

¹Institute for Basic Sciences, Chungbuk National University, Cheongju 361-763, Korea
²Department of Biology, Chungbuk National University, Cheongju 361-763, Korea

*Corresponding Author

Email: jeehwan1@hanmail.net

ABSTRACT

We described a freshwater filamentous zygnematacean species, Zygnema cruciatum (Vaucher) Agardh in Korea, based on light microscopy and scanning electron microscopy. Zygnema cruciatum is characterized by unbranched filaments of short cylindrical cells, two stellate chloroplasts per cell, a pyrenoid in each chloroplast. Cells are 32-39 μm in width and 35-50 μm in length. Conjugation is scalariform and female gametangia are cylindrical or slightly enlarged. Zygospores are yellow-brown, spherical or broadly ovoid, 35-44 μm wide and 40-47 μm long. Under SEM, wall of zygospore has pitted mesospore and pits are 1.4-1.8 μm in diameter and 3-4 μm apart from each other.

Key words: conjugation, morphology, Zygnema, Z. cruciatum, Zygnemataceae