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МОРФОЛОГИЧЕСКИЕ ТИПЫ ОРГАНИЗАЦИИ ПИРЕНОИДОВ У ЗЕЛЕНЫХ МОНАД

Болдина, О.Н. (2008) МОРФОЛОГИЧЕСКИЕ ТИПЫ ОРГАНИЗАЦИИ ПИРЕНОИДОВ У ЗЕЛЕНЫХ МОНАД. Вестник ТвГУ. Серия: Биология и экология (9). pp. 21-26. ISSN 1995-0160

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Abstract

В статье обсуждается роль пиреноида у зелёных монадных водорослей. У видов Chlamydomonas к настоящему времени выявлено 6 типов пиреноидов, различающихся между собой строением крахмальной обкладки, числом и характером расположения тилакоидов в строме пиреноида. Дан анализ распределения типов пиреноидов в группах Chlamydomonas и на кладограммах, предлагаемых разными авторами. Высказывается предложение рассматривать пиреноид как пример модульной организации. Ставится вопрос о гомологии пиреноидов у зелёных водорослей.

Abstract (en)

The pyrenoid is a dense structure in algal chloroplasts usually surrounded by polysaccharide envelope. Its body consists mainly of Rubisco protein, playing key role in plant photosynthesis. The pyrenoid function remains obscure, since some algae without pyrenoid possess high metabolic activity of Rubisco. The pyrenoid behaviour during cell cycle (division, disappearance or appearance de novo) could be attributed to the traces of nuclear acids. From the beginning of of 20th century the distinctions in pyrenoid structure have been revealed and some classifications were proposed. With the appearing of TEM the distinctions in the fine structure of pyrenoid components of different algal taxons have been described. The greatest variability in pyrenoid structure has been revealed in the genus Chlamydomonas. Actually the 6 pyrenoid types, varying in several traits (starch envelope; thylakoid number in a pack; character of the thylakoid distribution in stroma body) have been revealed. The analysis of pyrenoid distribution in Chlamydomonas taxonomic groups showed its irregularity. Nevertheless, existence of dominating pyrenoid types in some of the groups have been demonstrated. The type IV dominate in Euchlamydomonas and Chlorogoniella species, type III – in Chlamydella and Amphichloris. The types I, and VI were determined only in Chlorogoniella species; V – in Chlamydella species and type II – in single species of Agloe, Pseudagloe и Pleiochloris. The arrangement of pyrenoid types in cladograms for same strains of green monads has revealed correlation of pyrenoid types with the clades on the phylogenetic trees given by different researchers. In the trees algae having different taxonomic position, but the same pyrenoid type, quite often unite in one branch. On the othe hand, different branches (and clades) can contain algae with identical pyrenoid type. Therefore, the type of pyrenoid in green algae can be considered as an example of their modular organisation. Further analysis of distribution of pyrenoid types is needed to resolve the question of their homology at different groups Chlorophyta.

Item Type:Article
Additional Information:Болдина О.Н.– кандидат биологических наук, научный сотрудник Ботанического института им. В.Л. Комарова РАН
Uncontrolled Keywords:зелёные монадные водоросли, пиреноиды, Chlamydomonas, монады
Keywords (en):pyrenoid, algal chloroplasts, Chlamydomonas
Subjects:5 Математика. Естественные науки > 58 Ботаника > 582 Систематика растений > 582.26 BACILLARIOPHYTA (DIATOMEAE). ДИАТОМОВЫЕ ВОДОРОСЛИ
Divisions:Ботанические сады и заповедники > Ботанический институт им. В.Л. Комарова РАН, Санкт-Петербург
ID Code:108
Deposited By: evgeny levin
Deposited On:08 Jan 2017 08:05
Last Modified:08 Jan 2017 08:05

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