Sexual and asexual reproduction in a Mediterranean Tethya (Porifera, Demospongiae) species.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-07-22 DOI:10.1186/s40850-022-00142-9

Maria Mastrodonato, Giovanni Scillitani, Roberta Trani, Frine Cardone, Giuseppe Corriero, Carlotta Nonnis Marzano

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Abstract

Background: The reproductive cycle of the recently described sponge Tethya meloni was investigated for a period of 15 months (September 2018 - November 2019) in the Mar Piccolo of Taranto (Southern Italy) and was compared with data previously collected for the other two sympatric species of the same genus known for Mediterranean Sea, T. citrina and T. aurantium.

Results: T. meloni is a gonochoric species with a sex ratio strongly shifted towards females. Asexual budding was a seasonal process, limited to few specimens. In a specimen collected in September 2018 both oocytes and buds occurred, suggesting that in T. meloni the sexual and asexual phases may coexist both at the population and individual levels.

Conclusions: The data obtained from this research compared with the available literature confirm the high temporal variability of the reproductive cycles in the Mediterranean species of Tethya, but with common general characteristics. In sexual reproduction, the oocyte production period lasts several months, with a peak between summer and autumn while spermatogenesis, shorter but with greater reproductive effort, follows the onset of oogenesis. The asexual reproduction phase of T. meloni, on the other hand, occurs in a short period and seems to have less importance in the overall reproductive process.

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地中海一种海蛾(Porifera, Demospongiae)的有性和无性繁殖。

背景:在意大利南部塔兰托的Mar Piccolo，对最近描述的海绵Tethya meloni的生殖周期进行了为期15个月(2018年9月至2019年11月)的调查，并与先前收集的地中海同一属的其他两种同域物种T. citrina和T. aurantium的数据进行了比较。结果:黑绒螯虾属雌雄比例明显偏向雌性的雌雄同体物种。无性萌发是一个季节性的过程，局限于少数标本。在2018年9月采集的样本中，卵母细胞和芽都出现了，这表明在种群和个体水平上，T. meloni的有性和无性阶段可能共存。结论:本研究获得的数据与现有文献进行了比较，证实了地中海种Tethya的生殖周期具有较高的时间变异性，但具有共同的一般特征。在有性生殖中，卵母细胞的产生周期持续数月，在夏季和秋季之间达到高峰，而精子的发生时间较短，但生殖努力较大，紧随卵发生的开始。另一方面，T. meloni的无性生殖阶段发生的时间很短，在整个生殖过程中似乎不太重要。

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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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