南极陆生微藻对盐度胁迫的物种特异性反应。Klebsormidium sp.与Stigeoclonium sp.的比较研究。

IF 0.5 Q4 ECOLOGY

Czech Polar Reports Pub Date : 2022-09-05 DOI:10.5817/cpr2022-1-7

Diana Darriba Canora, Laura Llorens i Guasch, Rebeca Sicilia Zuazo

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引用次数: 2

摘要

我们研究了暴露于盐度胁迫（0–3M NaCl）3小时的南极藻类Klebsormium sp.和Stigeoclonium sp.细胞中PSII光化学过程的变化。盐度胁迫导致PSII电子传输（FPSII）的电势（FV/FM）和有效量子产率降低。盐度胁迫导致活力指数（Rfd，叶绿素荧光的相对降低）降低。对多相快速叶绿素荧光瞬态（OJIP）的分析表明，随着盐浓度的增加，在J、I和P相记录的叶绿素荧光信号下降，并且瞬态随着NaCl浓度的增加而变平，在3 M NaCl的盐浓度下暴露180分钟后，达到接近零的ChlF值。Klebsormium sp.比Stigeoclonium sp.更耐盐胁迫。

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Species-specific responses of Antarctic terrestrial microalgae to salinity stress. Comparative study in Klebsormidium sp. and Stigeoclonium sp.

We studied the changes in PSII photochemical processes in the cells of Antarctic algae Klebsormidium sp. and Stigeoclonium sp. exposed to salinity stress (0 – 3M NaCl) for 3 h. Salinity stress induced a decrease in the potential (FV/FM) and effective quantum yield of PSII electron transport (FPSII). Salinity stress induced a decrease in vitality index (Rfd, relative decrease of chlorophyll fluorescence). Analyses of the polyphasic fast chlorophyll fluorescence transients (OJIP) showed that with the increase in salt concentration, the chlorophyll fluorescence signals recorded at the phases J, I, and P declined, and the transient flattened with increaseing NaCl concentration reaching close to zero ChlF values at salt concentration of 3 M NaCl after 180 min. exposition. Klebsormidium sp. was found more salinity stress resistant than Stigeoclonium sp.

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来源期刊

Czech Polar Reports Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.30

自引率

10.00%

发文量

期刊介绍： Czech Polar Reports is an international, multidisciplinary, peer-reviewed journal. It is issued 2 times a year. The journal is dedicated to provide original research papers for sciences related to the polar regions and other planets with polar analogues. Czech Polar Reports covers the disciplines listed below. polar paleontology, geology, geochemistry, geomorphology, glaciology, climatology, hydrology, pedology, biochemistry, ecology, environmental science, microbiology, plant and animal biology including marine biology.