The Canopy-Forming Alga Ericaria brachycarpa (J.Agardh) Molinari-Novoa & Guiry (Fucales, Phaeophyceae) Shows Seasonal and Depth Adaptation to the Incoming Light Levels

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2021-04-28 DOI:10.5252/cryptogamie-algologie2021v42a6

N. Sant, E. Ballesteros

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引用次数: 2

Abstract

ABSTRACT The shallow water canopy-forming alga Ericaria brachycarpa (J.Agardh) Molinari-Novoa & Guiry shows higher photosynthetic efficiency (α), maximum photosynthetic rates (Pmax), light at compensation (Ic) and dark respiration (Rd) in individuals collected at the lower depth limit of distribution of the species (20 m) than at shallower depths (2 and 10 m). Photosynthesis at saturation light levels (Psat) does not change in crossed transplants from 3 to 20 and from 20 to 3 m neither after 11 or 90 days. However, production at low light levels (Pb) increased in transplants from 3 to 20 m and decreased in transplants from 20 to 3 m after 90 days. Photosynthesis, both at high and low light levels increased from June to September. Seasonality explained most of the variance (70%) in the values of Psat, whilst transplantation explained 47% of the variance for Pb and Rd. Thus, E. brachycarpa is able to adapt its photosynthetic performances across its depth distribution limits and easily cope with sudden variations in the light environment associated or not with seasonality.

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冠层形成藻brachycarpa (j.a agardh) Molinari-Novoa & Guiry (Fucales, Phaeophyceae)对光照水平的季节和深度适应

浅水冠层形成藻短叶藻(Ericaria brachycarpa, j.a agardh) Molinari-Novoa & Guiry表现出较高的光合效率(α)、最大光合速率(Pmax)、在物种分布的较浅深度(2和10 m)处收集的个体在补偿光(Ic)和暗呼吸(Rd)下的光合作用(Psat)在11天或90天后从3到20和从20到3 m的杂交移植物中都没有变化。然而，90 d后，低光照条件下移植物的产量在3 ~ 20 m范围内增加，在20 ~ 3 m范围内下降。从6月到9月，高光照和低光照下的光合作用都有所增加。季节性解释了Psat值的大部分差异(70%)，而移植解释了Pb和Rd值的47%的差异。因此，短叶藻能够在其深度分布范围内适应其光合性能，并且容易应对与季节性相关或无关的光环境的突然变化。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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