Aquatic Botany最新文献

{"title":"Sargassum hatchery-based cultivation and mariculture techniques in the Philippines: Practices, challenges, and future prospects","authors":"Maria Lyn M. Magcanta-Mortos ,&nbsp;Albaris B. Tahiluddin ,&nbsp;John Marlan R. Mortos ,&nbsp;Nonillon M. Aspe ,&nbsp;Jesrelljane Aaron-Amper ,&nbsp;Venus E. Leopardas ,&nbsp;Wilfredo H. Uy","doi":"10.1016/j.aquabot.2025.103925","DOIUrl":"10.1016/j.aquabot.2025.103925","url":null,"abstract":"<div><div><em>Sargassum</em> species are ecologically and economically significant marine macroalgae with potential applications in food, pharmaceuticals, biofuel production, and coastal habitat restoration. While <em>Sargassum</em> hatchery and mariculture techniques are well-documented in China and South Korea, research specific to the Philippines remains limited. This review examines the distribution, seasonality, and cultivation practices of <em>Sargassum</em> in the Philippines, emphasizing the biological and socio-economic factors affecting its successful farming. Unlike temperate regions where growth is highly seasonal, Philippine <em>Sargassum</em> populations exhibit year-round growth with peak biomass during cooler months (November-February). Challenges such as substrate instability, biofouling, and predation hinder large-scale out-planting, while socio-economic barriers include a lack of policy support, infrastructure, and fluctuating market demand. Existing hatchery-based techniques, such as zygote liberation and vegetative fragmentation, show promise but require optimization to enhance survival and productivity. Future research should focus on refining grow-out conditions, improving out-planting success, and developing sustainable farming models suited to Philippine coastal environments. With targeted investments in research, policy, and industry collaboration, <em>Sargassum</em> mariculture in the Philippines has the potential to support economic development while promoting marine conservation.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103925"},"PeriodicalIF":2.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First discovery of an intersubgeneric hybrid Sparganium emersum × S. microcarpum (Typhaceae) based on morphological and molecular data","authors":"Eugeny A. Belyakov ,&nbsp;Alexander G. Lapirov ,&nbsp;Tian Lv ,&nbsp;Shiran Zhan ,&nbsp;Xinwei Xu","doi":"10.1016/j.aquabot.2025.103919","DOIUrl":"10.1016/j.aquabot.2025.103919","url":null,"abstract":"<div><div>Hybridization is widespread in the genus <em>Sparganium</em>, but previously confirmed cases were restricted to crosses between species within the two subgenera (subg. <em>Xanthosparganium</em> or subg. <em>Sparganium</em>). Intersubgeneric hybridization had long been dismissed by most authoritative researchers, as experimental attempts to cross these lineages consistently failed. Here we reported <em>Sparganium × papczenkovii</em> Belyakov et Lapirov, a newly discovered natural hybrid resulting from the spontaneous hybridization between species of two <em>Sparganium</em> subgenera: <em>S. emersum</em> (subg. <em>Xanthosparganium</em>) and <em>S. microcarpum</em> (subg. <em>Sparganium</em>). The hybrid status of the found population was confirmed through principal coordinates analysis of seven morphological traits including tepal morphometrics comparing the hybrid, its putative parental species (<em>S. emersum</em> and <em>S. microcarpum</em>), and one more possible candidate – <em>S. erectum</em>. Sequence analysis of chloroplast and nuclear DNA further supported the hybrid origin, revealing that all examined <em>S. × papczenkovii</em> samples were heterozygous with <em>S. emersum</em> as the maternal parent and <em>S. microcarpum</em> as the paternal parent. We also found that all samples of <em>S. × papczenkovii</em> were F1 generations. We propose that post-zygotic reproductive isolation specifically, F1 sterility may maintain species boundary between <em>S. emersum</em> and <em>S. microcarpum</em>. Despite potential sterility, F1 hybrids in <em>Sparganium</em> exhibit significant ecological and evolutionary relevance, as their vegetative reproduction often grants them higher competitiveness compared to parental species.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103919"},"PeriodicalIF":1.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of desiccation time on performance of a cultured (Neopyropia yezonensis) and fouling alga (Ulva prolifera)","authors":"Yifei Shen ,&nbsp;Ruyan He ,&nbsp;Yuqing Sun ,&nbsp;Shuang Li ,&nbsp;Yinqing Zeng ,&nbsp;Peimin He ,&nbsp;Jianheng Zhang","doi":"10.1016/j.aquabot.2025.103912","DOIUrl":"10.1016/j.aquabot.2025.103912","url":null,"abstract":"<div><div><em>Neopyropia yezoensis,</em> a kind of red alga (Rhodophyta) that is a source of nori, is a highly valuable macroalga widely cultivated in coastal regions of East Asia. However, in recent years, <em>Neopyropia</em> cultivation areas have been frequently disturbed by green tide algae, particularly <em>Ulva prolifera</em>. To address this issue, we conducted a seven-day experiment subjecting both <em>N. yezoensis</em> and raft-attached <em>U. prolifera</em> to desiccation treatment twice daily, with exposure times ranging from 0 to 6 hours per treatment. The physiological responses were evaluated through microscopic structure analysis, maximum quantum yield of photosystem II (Fv/Fm), biomass measurements, and pigment content determination. Results showed that increasing desiccation time significantly affected the physiological status of <em>U. prolifera</em>. With prolonged desiccation time, both <em>U. prolifera</em> and <em>N. yezoensis</em> exhibited decreased Fv/Fm values, reduced biomass growth rate, and significant changes in pigment content. Desiccation periods of 5–6 hours reduced the photosynthetic efficiency of photosystem II (PSII) in <em>U. prolifera</em>. Although a single desiccation treatment temporarily inhibited the physiological status of <em>N. yezoensis</em>, after undergoing desiccation–rehydration cycles, the alga not only recovered its physiological function but also exhibited higher Fv/Fm values than the continuously submerged control group. However, for treatments with desiccation times exceeding 5 hours, productivity was somewhat affected, with the growth rate being approximately 24 % lower than that of the continuously submerged group. This indicates that desiccation-rehydration cycles promote the physiological status and biomass of <em>N. yezoensis</em>, demonstrating its superior adaptation to desiccation conditions. This study identified 5 hours as the optimal desiccation duration for <em>N. yezoensis</em> cultivation. Under these conditions, <em>N. yezoensis</em> maintained high growth rates and favorable physiological status while effectively inhibiting <em>U. prolifera</em> growth, providing a viable method for controlling <em>U. prolifera</em> in cultivation areas.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103912"},"PeriodicalIF":1.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plant characteristics of the non-native seagrass Halophila stipulacea in recently colonized beds of Puerto Rico","authors":"Alexi Ebersole ,&nbsp;James E. Kaldy ,&nbsp;Cayla Sullivan ,&nbsp;Angel Dieppa ,&nbsp;Ivelisse Cappielo Cosme ,&nbsp;Marco Orizondo Lugo","doi":"10.1016/j.aquabot.2025.103926","DOIUrl":"10.1016/j.aquabot.2025.103926","url":null,"abstract":"<div><div>The seagrass <em>Halophila stipulacea</em> is native to the Red Sea and Indian Ocean, and since entering the Caribbean in 2002 has spread rapidly throughout the eastern islands including Puerto Rico, and as far as Venezuela and Florida, USA. Despite the research attention to potential ecosystem disruption from <em>H. stipulacea</em> there is little data on the morphology and plant characteristics (e.g. biomass and density) of these new populations. In 2022 we surveyed shallow seagrass communities at 10 sites in 3 bays and characterized plant traits. <em>H. stipulacea</em> was present at 50 % of the sites. We measured leaf morphology on individual shoots, and collected samples for biomass, density, and leaf C:N:P. Density estimates ranged from 3000 to over 11,000 shoots m⁻² and biomass varied from 65 and 266 gdw m⁻². Mean leaf C:N:P varied between 393:18:1 and 772:27:1 with no strong indications of nutrient limitation. Leaf lengths ranged between 3.7 and 5.4 cm, width varied between 6.7 and 8 mm, with resulting leaf areas ranging between 2 and 3.5 cm². <em>H. stipulacea</em> leaf area index ranged between 0.6 and 3.9 m² leaf m² sediment, with higher LAI values represent a mechanism of self-shading in shallow, clear waters. The range expansion and <em>H. stipulacea</em> beds observed in this study provide supporting evidence that the Caribbean seagrass landscape is changing. Establishing long-term seagrass mapping and monitoring programs would help to assess the impact of this changing seagrass landscape.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103926"},"PeriodicalIF":1.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An aquatic pteridophyte, Salvinia, from the Subathu Formation (Late Paleocene–Early Eocene) of Himachal Himalaya, India, and its biogeographical implications","authors":"Ashif Ali ,&nbsp;Robert A. Spicer ,&nbsp;Tao Su ,&nbsp;Sampa Kundu ,&nbsp;Mahasin Ali Khan","doi":"10.1016/j.aquabot.2025.103916","DOIUrl":"10.1016/j.aquabot.2025.103916","url":null,"abstract":"<div><div><em>Salvinia</em>, a free-floating aquatic, rootless fern, has a rich fossil record in Cenozoic sediments of Southeast Asia, Europe, and North-South America. However, none have been reported from the Cenozoic sediments of India, until now. Here, we report the occurrence of vegetative remains (both impressions and compressions), along with trichome bases, resembling both morphologically and anatomically those of the extant genus <em>Salvinia</em> Séguier from the Late Paleocene-Early Eocene of the Subathu Formation in the Mandi District of Himachal Pradesh, northwestern India. These newly discovered fossils are characterized by round, elliptical, or elongate fronds, with small hexagonal or quadrangular areolaes, usually 8–16 tubercles in a row between adjacent lateral veins, and craspedodromous lateral veins lacking marginal loops. Anatomically, epidermal cells are quadrangular or polygonal with diacytic stomata composed of two guard cells and numerous conical, filiform, slightly enlarged, and curved non-glandular trichomes. We describe these Eocene specimens as a new species, namely <em>Salvinia indica</em> A. Ali &amp; M. A. Khan sp. nov. The discovery of this species suggests that the Eocene Subathu Formation represents sediments deposited in mostly calm freshwater bodies such as very low-energy meandering rivers, streams, or wetland ponds.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103916"},"PeriodicalIF":1.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the combined methods of live planting and seed dispersal in restoration of Zostera marina (eelgrass) in Barnegat Bay, New Jersey by genetic diversity and pedigree analysis of restored populations","authors":"Nicole Rodriguez Ortiz,&nbsp;Nathan Cruz,&nbsp;Tiffany V. Santos,&nbsp;Paul A.X. Bologna ,&nbsp;James J. Campanella","doi":"10.1016/j.aquabot.2025.103917","DOIUrl":"10.1016/j.aquabot.2025.103917","url":null,"abstract":"<div><div><em>Zostera marina</em> (eelgrass) is a near-shore marine plant species that provides essential ecosystem services both as food and refuge for a variety of sea life, as well as a physical anchor for the littoral sediment along temperate coastlines. Due to disease, anthropogenic reductive effects, and recent natural disasters, Barnegat Bay, NJ has seen a reduction in natural populations of the species over the last few decades. Newly restored beds of <em>Z. marina</em> were planted in 2021 and 2022 by a combined method of live transplants and seed dispersal. In 2023, we acquired tissue samples from restored populations with the following objectives: A) test how successful the combined restoration method was at producing thriving populations, B) determine genetic diversity and “genetic health” as partial indicators of restoration success, and C) determine kinship in order to help correlate ancestry and efficacious seagrass growth progression. We found each restored population evinced increased genetic diversity over donor populations, based upon improved observed heterozygosity (mean 0.584), low inbreeding fixation levels (mean -0.146), and higher effective population sizes (mean 2.988). Principal Coordinate Analysis indicated that restored plants are primarily related to live planted donors, with alleles from seed donors in evidence. Cluster Analysis supports that restored individuals have genetic components of all donors, but also suggests environmental selection and genetic bottlenecking have occurred. Statistical analysis confirms the presence of bottlenecks in all restored populations. Overall, results support initial success in restored seagrass meadows. As global declines in seagrass beds continue, with the accompanying loss in genetic diversity, restoration techniques that demonstrate success in ecosystem service recovery and increased genetic diversity will guide practitioners in preservation and restoration of these habitats.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"201 ","pages":"Article 103917"},"PeriodicalIF":1.9,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and photosynthetic improvement of Myriophyllum aquaticum plant traits through artificial adjustments","authors":"Daomin Cheng ,&nbsp;Peili Fu ,&nbsp;Qingqing Wang ,&nbsp;Wei Li ,&nbsp;Longyi Yuan ,&nbsp;Yang Liu ,&nbsp;Yu Cao","doi":"10.1016/j.aquabot.2025.103896","DOIUrl":"10.1016/j.aquabot.2025.103896","url":null,"abstract":"<div><div>Plant height is a key quantitative trait in plant ecology, linked with leaf area and stem diameter, affecting photosynthesis and water transport. Taller plants typically access lighte and resources, enhancing their competitive ability. However, the invasive aquatic plant <em>Myriophyllum aquaticum</em> usually reaches around 20 cm above the water surface. Despite its shorter stature, this species demonstrates rapid growth and efficient resource utilization, which contributes to its competitive success in various aquatic environments. This study aims to explore how altering its height impacts photosynthesis and water transport, providing insights into its growth adaptation mechanisms. We conducted an experiment with <em>M. aquaticum</em>, adjusting its height artificially (H) and comparing it to naturally maintained height (CK). We measured plant traits related to photosynthesis and water transport, including stem diameter, root pressure, and photosynthetic pigments (chlorophyll-a, chlorophyll-b, and carotenoids). Observations of guttation were also recorded. Under height-adjusted treatments, <em>M. aquaticum</em> exhibited positive significant growth responses with increased stem diameter and root pressure compared to the CK. Photosynthetic pigments were significantly higher in H than in CK. Notably, guttation was observed in CK but absent in H. Artificially increasing the height of <em>M. aquaticum</em> enhances its photosynthetic and hydraulic traits. However, this adjustment may lead to water deficiency issues, particularly during sunny conditions. This study contributes to understanding the ecological significance of plant height in aquatic species, highlighting the complex interplay between growth adaptations and environmental conditions.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103896"},"PeriodicalIF":1.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic diversity and population structure of four Trapa species from the Yangtze River and Amur River basins, China","authors":"Miriam Chepkwemoi Tengwer ,&nbsp;Godfrey Kinyori Wagutu ,&nbsp;Henry Kariuki Njeri ,&nbsp;Wei Li ,&nbsp;Yuan-Yuan Chen ,&nbsp;Xiang-Rong Fan","doi":"10.1016/j.aquabot.2025.103887","DOIUrl":"10.1016/j.aquabot.2025.103887","url":null,"abstract":"<div><div>Water chestnuts (<em>Trapa</em> L.) are annual floating-leaved macrophytes with significant economic and ecological values. Genetic information assessment of wild germplasm resources is essential to the effective utilization and cultivation breeding of this genus. Here, Expressed Sequence Tag-Simple sequence repeat (EST-SSR) markers were developed and used to evaluate the genetic diversity and population structure of the four common wild <em>Trapa</em> species from the two diversity centers of <em>Trapa</em> in China: the Yangtze River Basin (YRB) and the Amur River Basin (ARB). For the 12,178 EST-SSRs, the dinucleotide (55.3 %) was the predominant type. Using 19 primers, higher levels of genetic variation were detected in the two <em>Trapa</em> species from YRB (<em>T. bispinosa</em>: <em>H</em>e= 0.530; <em>T. quadrispinosa</em>: <em>H</em>e=0.498) than that of the species from ARB (<em>T. manshurica</em>: <em>H</em>e = 0.279; <em>T. maximowiczii</em>: <em>H</em>e=0.415). This might be attributed to the smaller population size and lower hydrological connectivity among populations for the two species of ARB. Correspondingly, the population differentiation levels within the two <em>Trapa</em> species in ARB (<em>T. manshurica</em>: <em>F</em>_ST=0.383; <em>T. maximowiczii</em>: <em>F</em>_ST=0.239) were higher than that of the species in YRB (<em>T. bispinosa</em>: <em>F</em>_ST=0.169; <em>T. quadrispinosa</em>: <em>F</em>_ST=0.124). The clustering analyses (UPGMA, PCoA and SRUCTURE) consistently showed that all the individuals were divided into three branches: the accessions from <em>T. maximowiczii</em> and <em>T. manshurica</em> were clustered based on their species origins; the same genetic group was shared by the individuals from <em>T. bispinosa</em> and <em>T. quadrispinosa</em>, which possessed similar fruit morphological characteristics in addition to the number of waist horns. Findings of this study suggested the <em>Trapa</em> populations with high genetic diversity should be prioritized for conservation in YRB, while each population should be equally protected because of obvious genetic differentiation among populations in ARB.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103887"},"PeriodicalIF":1.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of light and temperature on volatile mediated seaweed-bacteria interactions","authors":"Mahasweta Saha ,&nbsp;Pauline Benzi ,&nbsp;Andy Foggo","doi":"10.1016/j.aquabot.2025.103897","DOIUrl":"10.1016/j.aquabot.2025.103897","url":null,"abstract":"<div><div>Land plants strongly contribute to BVOCs (biogenic volatile organic compounds) which serve multiple ecological roles. Aquatic macrophytes such as seaweeds underpin some of the most extensive and productive coastal ecosystems globally. However, seaweed health and fitness can be negatively impacted through excessive bacterial colonisation on their surface. Just like land plants, seaweeds employ a range of chemicals to deter, reduce or “garden” epibacterial colonisation. Like plants, seaweeds are known to be prolific producers of BVOCs in the marine environment. However, unlike plants, the ecological roles of seaweed BVOCs, particularly in mediating seaweed-bacteria interactions, has hardly been explored, especially when compared to the role of non-volatile compounds. Although BVOC production is known to vary with abiotic factors in seaweeds, we do not know yet how such variations may alter ecological interactions of seaweeds with bacteria. Using two ecologically important seaweeds, <em>Fucus serratus</em> and <em>Palmaria palmata</em>, we investigated how different different light and temperature conditions can influence BVOCs mediated interactions of seaweeds with their bacteria We tested <em>F. serratus</em> and <em>P. palmata</em> BVOCs for their effect upon settlement in twelve common marine bacterial strains for the temperature experiment and seven common bacterial strains for the light experiment. When the seaweeds were incubated at higher temperature (21°C), the bacterial strains in contact with BVOCs from both <em>F. serratus</em> and <em>P. palmata</em> had a higher relative settlement compared to seaweeds incubated at ambient temperature (16°C). Overall temperature had a stronger significant effect than species identity. The effect of light on the BVOC mediated seaweed-bacteria interaction was less distinct but had a stronger inter-specific effect.</div></div><div><h3>Synthesis</h3><div>Our results provide the first evidence from an aquatic environment that BVOC mediated ecological interactions can vary between seaweed species and with light and temperature.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103897"},"PeriodicalIF":1.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nickel tolerance and phytoremediation potential of the aquatic plant Lemna minuta and the cyanobacterium Trichormus variabilis in monoculture and consortium","authors":"Valeria Carioti ,&nbsp;Saverio Savio ,&nbsp;Marco Fabriani ,&nbsp;Neil T.W. Ellwood ,&nbsp;Luca Gemin ,&nbsp;Roberta Congestri ,&nbsp;Maria Adelaide Iannelli ,&nbsp;Simona Ceschin","doi":"10.1016/j.aquabot.2025.103888","DOIUrl":"10.1016/j.aquabot.2025.103888","url":null,"abstract":"<div><div>One of the main threats to aquatic conservation is heavy metal pollution, with nickel (Ni) among the most significant contaminants. The Ni tolerance and remediation potential of <em>Lemna minuta</em> (vascular plant) and <em>Trichormus variabilis</em> (cyanobacterium) in contaminated water were investigated. The phytotoxic effects of nickel sulfate (NiSO₄·7 H₂O; 6.47 mg/L) on these two species, were assessed after 7- and 14-days exposure by measuring morphological changes, growth (fresh weight) and key physiological parameters (chlorophyll, malondialdehyde, protein content and catalase activity). The ability of <em>L. minuta</em> and <em>T. variabilis</em> to remove Ni was compared in both monoculture (single species) and consortium (mixed species) by measuring the reduction in Ni concentration in the culture medium. Nickel exposure induced phytotoxic effects in both species, as shown by decreases in fresh weight, chlorophyll and protein content, and increases in malondialdehyde content and catalase activity. These effects were more pronounced in monocultures, particularly in <em>T. variabilis</em>, compared to consortia. <em>Lemna minuta</em> exhibited good Ni tolerance and remediation capacity, removing 75 % and 86 % of the metal from the solution after 7 and 14 days, respectively. <em>Trichormus variabilis</em> removed 36 % and 27 % of the Ni after the same exposure time. Consortia exhibited high Ni removal, reaching 80 % and 90 % after 7 and 14 days, but this was not statistically different to <em>L. minuta</em> monocultures. These results demonstrate the potential of <em>L. minuta</em> in the remediation of Ni-contaminated waters and suggest that consortia might enhance the tolerance and viability of both species under Ni-stress.</div></div>","PeriodicalId":8273,"journal":{"name":"Aquatic Botany","volume":"200 ","pages":"Article 103888"},"PeriodicalIF":1.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}