Ultrastructural Study of Zoosporogenesis in the Siphonous Green Alga Derbesia tenuissima (Chlorophyta)
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 378854135 | ||
| 003 | CHVBK | ||
| 005 | 20180305123330.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 161128e20030905xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.1515/BOT.2003.044 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1515/BOT.2003.044 | ||
| 245 | 0 | 0 | |a Ultrastructural Study of Zoosporogenesis in the Siphonous Green Alga Derbesia tenuissima (Chlorophyta) |h [Elektronische Daten] |c [S.-H. Lee, T. Motomura, T. Ichimura] |
| 520 | 3 | |a Based on transmission electron microscopy observation, zoosporogenesis in the siphonous multinucleate green alga Derbesia tenuissima can be divided into five stages. In vegetative sporophytes and Stage 1 sporangia, the cytoplasm was distinguished as two regions, the inner region of chloroplasts and the outer region of nuclei. In Stage 1 sporangia, the chloroplasts differentiated into amyloplasts and contained large starch grains. In Stage 2 sporangia, several meiotic nuclei with synaptonemal complexes were observed in the apical and the subapical portions of a sporangium. The width of a synaptonemal complex was 103±5 (mean ± standard deviation) nm (n = 20). In Stage 3 sporangia, the plug complex that was composed of 4 layers as observed with transmission electron microscopy, was formed between the sporangium and the main axis. In Stage 4 sporangia, the following conspicuous characters were observed: 1) differentiation of nuclei into two types, 2) de novo appearance of centrioles (flagellar basal bodies) on the type 2 nuclei (large), 3) decrease in the number of the type 1 nuclei (small), 4) development of cleavage furrows and vesicles, 5) formation and elongation of flagellar axonemes, and 6) development of three characteristic bands on the flagellar basal bodies. In Stage 5 sporangia, differentiation of flagella and flagellar bands was completed. Each stephanokont zoospore of D. tenuissima had about 80 flagella, about 16 nuclei and many chloroplasts. | |
| 540 | |a Copyright © 2003 by Walter de Gruyter GmbH & Co. KG | ||
| 690 | 7 | |a Hydrobiology |2 nationallicence | |
| 690 | 7 | |a Mycology, fungi |2 nationallicence | |
| 690 | 7 | |a Botany & plant sciences |2 nationallicence | |
| 700 | 1 | |a Lee |D S.-H |4 aut | |
| 700 | 1 | |a Motomura |D T. |4 aut | |
| 700 | 1 | |a Ichimura |D T. |4 aut | |
| 773 | 0 | |t Botanica Marina |d Walter de Gruyter |g 46/5(2003-09-05), 438-449 |x 0006-8055 |q 46:5<438 |1 2003 |2 46 |o botm | |
| 856 | 4 | 0 | |u https://doi.org/10.1515/BOT.2003.044 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1515/BOT.2003.044 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Lee |D S.-H |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Motomura |D T. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Ichimura |D T. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Botanica Marina |d Walter de Gruyter |g 46/5(2003-09-05), 438-449 |x 0006-8055 |q 46:5<438 |1 2003 |2 46 |o botm | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||