Morphology and distribution of some marine diatoms, family Rhizosoleniaceae, genus Rhizosolenia, in Korean coastal waters

Abstract

The present study describes the morphology, taxonomy, and distribution of species belonging to the diatom genus Rhizosolenia in Korea's marine coastal waters. From September 2008 to February 2010, we collected phytoplankton samples at 30 sites along the Korean coastline and studied them by light and scanning electron microscopy. We found 6 rhizosolenid genera in our samples: Rhizosolenia, Dactyliosolen, Guinardia, Pseudosolenia, Proboscia, and Neocalyptrella. In the present paper, we studied the following rhizosolenid species and compared them with congeners: R. pungens, R. fallax, R. imbricata, Rhizosolenia sp. 1, and Rhizosolenia sp. 2. The morphology of R. pungens exhibits important diagnostic characteristics in its girdle segment structure in the column and in its external process. To distinguish R. fallax and R. imbricata, the most important characteristics are the striation and the velum structure. R. pungens occurred in our samples all along the Korean coast. Only rarely did we find R. imbricata in the samples and at low abundance. We recorded R. fallax, Rhizosolenia sp. 1 and Rhizosolenia sp. 2 for the first time in Korean waters, but they rarely occurred.

Can diatom girdle band pores act as a hydrodynamic viral defense mechanism?

“…Table 4 General pore sizes (valve and girdle band pores) across four diatom species and their corresponding Péclet numbers, using Eq. (9) assuming T ff = 0.025 s and D fs = 14.5 μm 2 s −1 [4,14,[42][43][44][45][46][47][48][49] Rhizosolenia seƟgera [42,43] Coscinodiscus sp.…”

Complete mitochondrial genome of Rhizosolenia setigera (Coscinodiscophyceae, Bacillariophyta)

“…Rhizosolenia plays a significant role in carbon, silica and nitrogen cycles in the oligotrophic seas ( Shipe et al 1999; Pilskaln et al 2005 ). Most researches on Rhizosolenia species focused on morphological features (Sorhannus 1990 ; Yun and Lee 2015 ), while molecular research on Rhizosolenia species remain insufficient. Here, we constructed the complete mtDNA of the species Rhizosolenia setigera Brightwell 1858.…”