Physiological assessment of 2 color strains of Crassiphycus corneus (J. Agardh) Gurgel, J.N. Norris et Fredericq (Gracilariales, Rhodophyta): Effects of temperature and irradiance

IF 0.5 4区生物学 Q4 MARINE & FRESHWATER BIOLOGY

Ciencias Marinas Pub Date : 2020-06-26 DOI:10.7773/cm.v46i2.3074

J. Jofre, N. Navarro, E. Plastino

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引用次数: 0

Abstract

Crassiphycus corneus (J.Agardh) Gurgel, J.N.Norris et Fredericq (Gracilariales, Rhodophyta) is a species with high-quality and high yields of polysaccharides and is therefore an important agarophyte on the west coast of the Atlantic Ocean. On the northeastern coast of Brazil, the populations of this species are mostly composed of individuals of the wild red color strain and by some individuals of the green color strain, the latter being scarcely studied. This work characterizes and compares the physiological performance of the wild red strain and the green variant under different temperature and irradiance conditions in the laboratory. The results indicate that the green and red strains are similarly tolerant to low temperatures (18 oC) but intolerant to high temperatures (35 oC). Both strains exhibited the highest growth rate at 25 oC and high irradiance (500 μmol photon·m–2·s–1). Under these conditions, photosynthetic rate and pigment content were similar in both color strains, but growth rates were higher in the red strain. Despite this difference, it is important to highlight that the green strain showed a growth rate of over 10%, which indicates that it could be used for cultures aiming to obtain products with added value.

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Gurgel, J.N. Norris et Fredericq (Gracilariales, Rhodophyta) 2个颜色菌株的生理评价:温度和光照的影响

Crassiphycus corneus (j.a agardh) Gurgel, j.n.n norris et Fredericq (Gracilariales, Rhodophyta)是一种优质高产多糖的菌种，是大西洋西海岸重要的无藻植物。在巴西东北海岸，这个物种的种群主要由野生红色菌株的个体和一些绿色菌株的个体组成，后者很少被研究。本研究在不同温度和辐照度条件下，对野生红色菌株和绿色菌株的生理性能进行了表征和比较。结果表明，绿色菌株和红色菌株对低温(18℃)的耐受性相似，但对高温(35℃)的耐受性不高。两株菌株在25℃和500 μmol光子·m-2·s-1的辐照下均表现出最高的生长速率。在这些条件下，两种颜色菌株的光合速率和色素含量相似，但红色菌株的生长速度更高。尽管存在这种差异，但重要的是要强调绿色菌株的增长率超过10%，这表明它可以用于旨在获得具有附加值产品的培养。

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来源期刊

Ciencias Marinas 生物-海洋与淡水生物学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： A bilingual open-access publication, Ciencias Marinas (CM) is an international peer-reviewed journal that contains original research findings in all areas of marine science. It is published quarterly by the Autonomous University of Baja California, Mexico, and all its contents are publicly available on our journal website. Though a limited number of copies are still printed, the journal is mainly distributed in its electronic format. CM was conceived in 1973 as part of an academic project aimed to entice local researchers to publicly disclose their findings by adopting the culture of peer-review publishing. This academic project evolved into an international journal after accepting papers from researchers in the United States and, eventually, other parts of the world. Because of the diversity in authorship, CM issues were initially published in either Spanish or English, and occasionally in both languages. It was not until 1984 when CM included both language versions of all its contents, and it then became the fully bilingual journal it still is today. At CM we believe our inclusive format allows us not only to address a wider range of submissions from international authors but also to make published findings available to a wider international audience. So whether you are looking for information on the redfish in Icelandic waters or the physical and biological properties of the Gulf of California, feel free to peruse CM contents. You may find them to provide source material for your research.