Carbonic anhydrase localization in charophycean green algae: Ecological and evolutionary significance

Citation
P. Arancibia-avila et al., Carbonic anhydrase localization in charophycean green algae: Ecological and evolutionary significance, INT J PL SC, 162(1), 2001, pp. 127-135
Citations number
31
Categorie Soggetti
Plant Sciences
Journal title
INTERNATIONAL JOURNAL OF PLANT SCIENCES
ISSN journal
10585893 → ACNP
Volume
162
Issue
1
Year of publication
2001
Pages
127 - 135
Database
ISI
SICI code
1058-5893(200101)162:1<127:CALICG>2.0.ZU;2-W
Abstract
Two carbonic anhydrase (CA) antibodies, one to the primarily periplasmic al pha-type enzyme of the chlorophycean Chlamydomonas and another to pea (Pisu m sativum) beta-type CA, which is primarily located in the chloroplast stro ma, were applied to the charophycean green alga Mougeotia sp., shoot cells of the later divergent charophycean, Chara zeylanica, and control Chlamydom onas cells and pea leaf tissues. Immunolocalizations were quantitatively as sessed at the ultrastructural level; nonimmune labeling was negligible in a ll cases. The Chlamydomonas antibody intensely labeled inner cell wall, per iplasmic region, and peripheral cytoplasm of Chlamydomonas, Mougeotia, and Chara. The concentration of periplasmic label did not significantly differ among these green algae. This is the first immunolocalization evidence for occurrence of a periplasmic CA in Chara. Chloroplasts of Mougeotia, Chara, and pea were also labeled by the Chlamydomonas antibody, suggesting that pl ants inherited a plastid thylakoid-based, alpha-type CA from charophycean a ncestors. The pea antibody labeled Chara chloroplasts but not those of Chla mydomonas or Mougeotia. The concentration of pea antibody stromal label did not significantly differ between pea and Chara. This is the first immunolo calization evidence for occurrence of a higher-plant, beta-type stromal CA in green algal plastids.