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New Record of some red algal species (Rhodophyta) from Korea
  • 비영리 CC BY-NC
  • 비영리 CC BY-NC
ABSTRACT

Rhodophyta is one of major groups in the number of species and diversity of the marine algal flora. The occurrence of Korean 5 red algal species is reported for the first time on the list of Korean marine algal flora based on morphology: Ceramium pacificum, Cumathanmnion serrulatum, Gayliella fimbriata, Leptofauchea rhodymenioides, Sorella pulchra. Ceramium pacificum from Korea is recognized by complete cortication, many adventitious branches in a radial arrangement, 7-8 periaxial cells, and plant length of 1-2 cm. Cumathanmnion serrulatum is characterized by cartilaginous single main axis with a prominent midrib, serrulate blade, many higher orders of bladelets on each blade, and tetrasporagia produced near the midrib acropetally and then outwardly. Gayliella fimbriata is featured by clavate gland cell and 5-7 periaxial cells. Leptofauchea rhodymenioides is characterized by erect with flattened, dichotomously branched fronds, 1-2 cortical cells loosely arranged, 2-3 cell medullar layers with large colourless cells. Sorella pulchrais recognized by short branches produced alternately pinnate manner from margins of axial, mostly polystromatic frond, and tetrasporangial sori on the center of branches.


KEYWORD
Ceramium pacificum , Cumathanmnion serrulatum , Gayliella fimbriata , Korea , Leptofauchea rhodymenioides , Rhodophyta , Sorella pulchra
참고문헌
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이미지 / 테이블
  • [ Fig. 1. ]  Ceramium pacificum from Jumunjin, Korea. (A) Female plant with numerous branchlets. (B) Details of branches. (C) Branching point with complete cortication. (D) Apical region. (E) Axial cell (arrow) with 7-8 pericentral cells (arrowheads, p) in transverse section. (F) Mature cystocarp (cy). Scale bars represent: A, 5 mm; B, 2 mm; C, 30 μm; D, E, 40 μm; F, 200 μm.
    Ceramium pacificum from Jumunjin, Korea. (A) Female plant with numerous branchlets. (B) Details of branches. (C) Branching point with complete
cortication. (D) Apical region. (E) Axial cell (arrow) with 7-8 pericentral cells (arrowheads, p) in transverse section. (F) Mature cystocarp (cy). Scale bars
represent: A, 5 mm; B, 2 mm; C, 30 μm; D, E, 40 μm; F, 200 μm.
  • [ Fig. 2. ]  Cumathamnion serrulatum from Sokcho, Korea. (A) Vegetative plant. (B) Holdfast. (C) Lower part of thallus. (D-E) Upper part of thallus showing alternate branching patterns and many higher order bladelets. (F) Middle part of thallus with midrib (mid) and lateral veins on blade. (G-H) Apical region of thallus showing serrulate margin (arrows). (I) Cross section view near holdfast. (J) Cross section view of secondary axis with axial cell (ax). (K) Cross section view of tertiary blade with axial cell (ax). (L) Tetrasporangial plant with tetrasporangia (t) produced on lateral pericentral cells. (M) Cross section view of tetrasporangial thallus with tetrasporangia (t). Scale bars represent: A, 2 cm; B, 3 mm; C, 2 mm; D, F, I, 500 μm; E, J, K, M, 100 μm; G, H, 50 μm; L, 200 μm.
    Cumathamnion serrulatum from Sokcho, Korea. (A) Vegetative plant. (B) Holdfast. (C) Lower part of thallus. (D-E) Upper part of thallus showing
alternate branching patterns and many higher order bladelets. (F) Middle part of thallus with midrib (mid) and lateral veins on blade. (G-H) Apical region of
thallus showing serrulate margin (arrows). (I) Cross section view near holdfast. (J) Cross section view of secondary axis with axial cell (ax). (K) Cross section
view of tertiary blade with axial cell (ax). (L) Tetrasporangial plant with tetrasporangia (t) produced on lateral pericentral cells. (M) Cross section view of
tetrasporangial thallus with tetrasporangia (t). Scale bars represent: A, 2 cm; B, 3 mm; C, 2 mm; D, F, I, 500 μm; E, J, K, M, 100 μm; G, H, 50 μm; L, 200 μm.
  • [ Fig. 3. ]  Gayliella fimbriata from Gampo, Korea. (A) Vegetative plant. (B) Upper part of thallus with gland cells (arrow). (C-E) incomplete cortication of upper (C), middle (D), and lower (E) with gland cells (arrows). (F) Cortitical band with periaxial (p) and cortical cells. (G-I) Developmental series of cortication filaments from periaxial cell (p). (J-L) Cross section views of upper (J), middle (K), and lower (L) thallus showing development of periaxial cells (p1-6, p). (M) Rhizoid (r). Scale bars represent: A, 200 μm; B, 100 μm; C-F, 25 μm; G-M, 20 μm.
    Gayliella fimbriata from Gampo, Korea. (A) Vegetative plant. (B) Upper part of thallus with gland cells (arrow). (C-E) incomplete cortication of upper
(C), middle (D), and lower (E) with gland cells (arrows). (F) Cortitical band with periaxial (p) and cortical cells. (G-I) Developmental series of cortication
filaments from periaxial cell (p). (J-L) Cross section views of upper (J), middle (K), and lower (L) thallus showing development of periaxial cells (p1-6, p). (M)
Rhizoid (r). Scale bars represent: A, 200 μm; B, 100 μm; C-F, 25 μm; G-M, 20 μm.
  • [ Fig. 4. ]  Leptofauchea rhodymenioides from Juk-do, Ulreng-gun, Korea. (A) Vegetative plant. (B) Details view of small discoid holdfast (h). (C) Cross section view showing cortex (c) and medulla (md). (D) Marginal part of thallus showing gelatinous membrane. (E) Cross section view of marginal thallus. (F) Surface of thallus. Scale bars represent: A, 2cm; B, 539.05 μm; C-F, 50 μm.
    Leptofauchea rhodymenioides from Juk-do, Ulreng-gun, Korea. (A) Vegetative plant. (B) Details view of small discoid holdfast (h). (C) Cross section
view showing cortex (c) and medulla (md). (D) Marginal part of thallus showing gelatinous membrane. (E) Cross section view of marginal thallus. (F) Surface
of thallus. Scale bars represent: A, 2cm; B, 539.05 μm; C-F, 50 μm.
  • [ Fig. 5. ]  Sorella pulchra (Yamada) Yoshida & Mikami. (A) Holotype specimen (SAP048988, photo taken by M. S. Kim) deposited in SAP, Hokkaido, Japan. (B) Tetrasporangial plant from Dueok-do, Wan-do, Korea on 27 July 2012. (C-E) Cross section views of upper (C), middle (D), and lower (E) part of main branch showing an axial cell (ax) surrounded by several cortical cell layers decreasing to upward. (F) Apical part of thallus showing primary (1) to fourth-order (4) cell rows, cells resulting intercalary divisions (i). (G) Tetrasporangial sori (arrow heads) produced on the centers of branchlets. (H) Cross section view of tetrasporangial sori showing two layers of tetrasporangia (t). (I-J) Procarps composed of a supporting cell (sc), a group of sterile cells (st), and two groups of four-celled carpogonial branch (cb). (K) Mature cystocarp composed a large fusion cell (fu), carposporangia (ca) on the terminal of gonimoblasts (gb), 5-8 cells thick pericarp, and an prominent ostiole on apical portion. Scale bars represent: A, B, 1 cm; G, 500 μm; D, E, K, 100 μm; H, 50 μm; C, F, I, J, 20 μm.
    Sorella pulchra (Yamada) Yoshida & Mikami. (A) Holotype specimen (SAP048988, photo taken by M. S. Kim) deposited in SAP, Hokkaido, Japan. (B)
Tetrasporangial plant from Dueok-do, Wan-do, Korea on 27 July 2012. (C-E) Cross section views of upper (C), middle (D), and lower (E) part of main branch
showing an axial cell (ax) surrounded by several cortical cell layers decreasing to upward. (F) Apical part of thallus showing primary (1) to fourth-order
(4) cell rows, cells resulting intercalary divisions (i). (G) Tetrasporangial sori (arrow heads) produced on the centers of branchlets. (H) Cross section view of
tetrasporangial sori showing two layers of tetrasporangia (t). (I-J) Procarps composed of a supporting cell (sc), a group of sterile cells (st), and two groups of
four-celled carpogonial branch (cb). (K) Mature cystocarp composed a large fusion cell (fu), carposporangia (ca) on the terminal of gonimoblasts (gb), 5-8
cells thick pericarp, and an prominent ostiole on apical portion. Scale bars represent: A, B, 1 cm; G, 500 μm; D, E, K, 100 μm; H, 50 μm; C, F, I, J, 20 μm.
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