Journal of Applied Phycology最新文献_第7页

Octanoic acid helps Poterioochromonas malhamensis control toxic Microcystis sp. 辛酸有助于马勒哈姆藻控制有毒的微囊藻。

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-07-03 DOI: 10.1007/s10811-024-03301-2

Hao Yan, Qin Li, Xiaoxue Liu, Anya Jin, Yu Yao

{"title":"Octanoic acid helps Poterioochromonas malhamensis control toxic Microcystis sp.","authors":"Hao Yan, Qin Li, Xiaoxue Liu, Anya Jin, Yu Yao","doi":"10.1007/s10811-024-03301-2","DOIUrl":"https://doi.org/10.1007/s10811-024-03301-2","url":null,"abstract":"This study explores the synergistic use of the mixotrophic flagellate Poterioroochromonas malhamensis and octanoic acid to effectively control harmful Microcystis sp. and prevent the resurgence of resistant strains. Poterioroochromonas malhamensis efficiently grazes on Microcystis sp., yet predation pressure can drive the evolution of resistant strains, which often re-emerge and predominate within approximately 20 days. Importantly, octanoic acid maintains its inhibitory and lethal effects against these strains, preventing their comeback. The study's key findings are as follows: (1) The concurrent application of P. malhamensis and 100 mg L-1 octanoic acid rapidly eliminates Microcystis sp., utilizing the acid's resistance-suppressing properties to prevent regrowth. (2) A preliminary reduction of Microcystis sp. density by P. malhamensis, succeeded by a low dose of octanoic acid (12.5 mg L-1 or higher), postpones the resurgence, presenting a cost-effective strategy. (3) In instances where P. malhamensis density is inadequate for controlling Microcystis sp. alone, a supplementary application of octanoic acid at 25 mg L-1 daily for four days (25 mg L-1× 4) aids P. malhamensis in eradicating Microcystis sp. The study concludes that octanoic acid fortifies the biological control by P. malhamensis and, by inhibiting and eliminating resistant Microcystis strains, introduces an innovative strategy for managing Microcystis blooms.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"28 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cyanobacteria-based nutrimental strategy to enhance yield and quality of spinach 基于蓝藻的营养策略，提高菠菜的产量和质量

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-07-02 DOI: 10.1007/s10811-024-03292-0

Ravi Mourthy Nivedha, Radha Prasanna, Akanksha Bhardwaj, Nallappa Reddy Bavana, Shalini Gaur Rudra, Awani Kumar Singh, Sandeep Kumar Lal, Sudipta Basu, Yashbir Singh Shivay

{"title":"Cyanobacteria-based nutrimental strategy to enhance yield and quality of spinach","authors":"Ravi Mourthy Nivedha, Radha Prasanna, Akanksha Bhardwaj, Nallappa Reddy Bavana, Shalini Gaur Rudra, Awani Kumar Singh, Sandeep Kumar Lal, Sudipta Basu, Yashbir Singh Shivay","doi":"10.1007/s10811-024-03292-0","DOIUrl":"https://doi.org/10.1007/s10811-024-03292-0","url":null,"abstract":"The intricate interplay of plant-soil-microbial formulations was explored using cyanobacterium-based mixes (Anabaena laxa C11, Nostoc carneum BF2 and Anabaena laxa RPAN8) as seed coating, followed by soil drench at selected growth stages in spinach (variety Pusa All green). A field experiment under shade net conditions was conducted and data recorded 2, 3, 5 WAS (Weeks after sowing) and harvest stage. Cyanobacterial treatments led to significantly higher pigment content (0.58-1.29-fold), along with substantial enhancement in the enzyme activities of nitrate reductase (0.33 - 0.49-fold), glutamine synthetase (0.35 - 0.53-fold) and phosphoenol pyruvate carboxylase activity (0.17 -0.38-fold) in leaves. RPAN8 treatment led to a notable increase in spinach yield, while BF2 treatment stimulated ascorbic acid (0.37-fold), antioxidants (0.36-fold) and β-carotene (0.41-fold) in fruits, over control. Overall, C11 treatment consistently exhibited significantly superior results in terms of growth, soil microbiological, yield and quality attributes. Principal Component analyses illustrated a strong positive correlation of fruit ascorbic acid with soil chlorophyll and available iron. Path coefficient analysis revealed positive direct effects of available nitrogen with PEPCo, nitrate reductase, chlorophyll a, carotenoids, leaf area and antioxidants at different sampling intervals. Such organic formulations can be a valuable resource-efficient strategy for improving spinach yield and quality.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"20 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing seaweed biomass production - a two kelp solution 优化海藻生物量生产--双海带解决方案

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-07-02 DOI: 10.1007/s10811-024-03296-w

Michael Stekoll, Alf Pryor, Alexandra Meyer, Hauke L. Kite-Powell, David Bailey, Kendall Barbery, Clifford A. Goudey, Scott Lindell, Loretta Roberson, Charles Yarish

{"title":"Optimizing seaweed biomass production - a two kelp solution","authors":"Michael Stekoll, Alf Pryor, Alexandra Meyer, Hauke L. Kite-Powell, David Bailey, Kendall Barbery, Clifford A. Goudey, Scott Lindell, Loretta Roberson, Charles Yarish","doi":"10.1007/s10811-024-03296-w","DOIUrl":"https://doi.org/10.1007/s10811-024-03296-w","url":null,"abstract":"Interest in farming kelps has grown beyond using kelp for food, feed or biofuels. There is considerable interest in generating biomass from seaweed for use in bioplastics and other products that would substitute for petroleum-derived products. For these uses to be viable, large amounts of biomass are needed. Very large kelp farms can be expensive to build and maintain, leading to the need to optimize the biomass per unit area. Although close spacing of growlines can lead to poor growth, a viable approach may be to grow two species of kelps together: one that hangs down and one that is buoyant, growing up. This system would increase the spacing in three dimensions. In Alaska, Saccharina latissima is commonly grown hanging down from longlines. One of the buoyant Alaskan kelps is Nereocystis luetkeana. Because there are commercial uses for wild-harvested Nereocystis in Alaska, we undertook a preliminary trial in Kodiak, Alaska, that grew both Saccharina and Nereocystis in the same longline array. Closely spaced lines were seeded the first week of February 2023 and set at 3 m below the surface. The arrays were harvested in late June 2023. Total yields were greatest on the combined arrays, followed by the Nereocystis only and Saccharina only arrays. Despite having 45% fewer grow-lines, the total yield of the Nereocystis on the combined arrays was statistically similar to the Nereocystis only arrays. These results may have significance for large scale macroalgal production.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"43 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects on fatty acids, biochemical composition and growth of rotifer (Brachionus plicatilis) fed with different concentrations of Nannochloropsis sp. 用不同浓度的 Nannochloropsis sp.

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-07-01 DOI: 10.1007/s10811-024-03302-1

Mustafa İbrahim Osmanoğlu, Mahmut Elp, Yaşar Durmaz

{"title":"Effects on fatty acids, biochemical composition and growth of rotifer (Brachionus plicatilis) fed with different concentrations of Nannochloropsis sp.","authors":"Mustafa İbrahim Osmanoğlu, Mahmut Elp, Yaşar Durmaz","doi":"10.1007/s10811-024-03302-1","DOIUrl":"https://doi.org/10.1007/s10811-024-03302-1","url":null,"abstract":"The density of microalgae and nutrient content have impact on the population growth rate, egg rate and nutritional values of rotifers. The aim of this study was to investigate the effects of different concentrations of the alga Nannochloropsis sp. (N10: 10x106, N20: 20x106, N30: 30x106 cells mL-1) on the growth, egg rate, biochemical composition and fatty acid profile of the rotifer Brachionus plicatilis. To maintain a consistent algae density, an equivalent quantity was supplemented to compensate for any reduction. The study was started with three replicates, each with an initial inoculation density of 200 Brachionus individuals mL-1 . The investigation spanned 5 days, during which population parameters (total number of individuals, proportion of individuals with eggs and growth rate) were calculated. After the study period, rotifers were harvested for subsequent biochemical and fatty acid analyses. Notably, the N30 group showed the highest proportions of crude protein (54.41%) and crude lipid (34.5%). The N20 group displayed the most substantial content of total fatty acids, recording a value of 70.69%. Consequently, the N30 group, with a concentration of 30x106 cells mL-1, emerged as the most proficient group, demonstrating superior performance in both population growth and biochemical composition.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"16 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient secretion of a true laccase by the acidophilic green microalga Chlamydomonas pitschmannii switched to alkaline pH 嗜酸性绿色微藻皮氏衣藻在碱性 pH 条件下高效分泌真正的漆酶

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-29 DOI: 10.1007/s10811-024-03299-7

Stéphanie Gérin, Claire Remacle

{"title":"Efficient secretion of a true laccase by the acidophilic green microalga Chlamydomonas pitschmannii switched to alkaline pH","authors":"Stéphanie Gérin, Claire Remacle","doi":"10.1007/s10811-024-03299-7","DOIUrl":"https://doi.org/10.1007/s10811-024-03299-7","url":null,"abstract":"Laccases are extracellular multicopper oxidases that react with a broad range of aromatic substrates and are used for many biotechnological applications. Recently, microalgal laccases were discovered and started to be characterized in some Chlorophyceae (Tetracystis aeria and a few other species). A volumetric activity of maximum 27 U L-1 could be reached with Chlamydomonas moewusii, which is largely insufficient to compete with fungi and heterologous expression systems. Here, the acidophilic green microalga Chlamydomonas pitschmannii was shown to be a new promising source of laccase competing with fungi in terms of secretion yields. By modulating culture pH and CO2 supply, laccase volumetric activity in the supernatant could be increased from 12 to 459 U L-1. Laccase-containing supernatants were found to oxidize many phenolic and non-phenolic substrates with an efficiency that was pH-dependent. 1D SDS-PAGE was achieved and lighted up that C. pitschmannii laccase is a glycosylated protein. Functional measurements pointed out the participation of glycosylation in functional enzymatic regulation and integrity. Two bands of about 50 and 45 kD were detected that presumably corresponded to laccase. In agreement with previous studies in T. aeria, we hypothesize that C. pitschmannii laccase is a heterodimer, a feature that denotes with most known laccases, essentially monomeric. Altogether, those results demonstrate that efforts of discovery and characterization of microalgal laccases must be continued with regards to the amazing potential they offer for biotechnological applications.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"62 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling the growth of the cultivated seaweed Undaria pinnatifida under climate change scenarios in the Seto Inland Sea, Japan 模拟气候变化情景下日本濑户内海养殖海藻裙带菜的生长情况

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-21 DOI: 10.1007/s10811-024-03291-1

Goh Onitsuka, Goro Yoshida, Hiromori Shimabukuro, Shoichi Takenaka, Toshiharu Tamura, Shigeho Kakehi, Takashi Setou, Xinyu Guo, Hironori Higashi

{"title":"Modeling the growth of the cultivated seaweed Undaria pinnatifida under climate change scenarios in the Seto Inland Sea, Japan","authors":"Goh Onitsuka, Goro Yoshida, Hiromori Shimabukuro, Shoichi Takenaka, Toshiharu Tamura, Shigeho Kakehi, Takashi Setou, Xinyu Guo, Hironori Higashi","doi":"10.1007/s10811-024-03291-1","DOIUrl":"https://doi.org/10.1007/s10811-024-03291-1","url":null,"abstract":"To assess the potential effects of future climate change on Undaria pinnatifida cultivation in the Seto Inland Sea, Japan, we developed an individual-based growth model for the U. pinnatifida sporophyte. Initially, we validated the model’s performance using field observation data. The simulation results replicated temporal variations in the total lengths of sporophytes at two stations with differing oceanographic conditions. Subsequently, we conducted numerical simulations of sporophyte growth in the Seto Inland Sea during the 1990s and projected outcomes for the 2090s under four emission scenarios of the Representative Concentration Pathway (RCP 2.6, 4.5, 6.0, and 8.5). The majority of areas exhibited decreased sporophyte growth in the 2090s compared to the 1990s, except for the eastern area under the RCP 2.6 scenario. This decline was attributed to delayed cultivation start times associated with ocean warming and reduced dissolved inorganic nitrogen concentrations. Interestingly, the impacts of ocean warming on U. pinnatifida cultivation were not uniformly negative. In addition to adverse effects, there were positive effects that accelerated growth rates in low-temperature winter areas. Sensitivity analyses revealed that the balance between positive and negative impacts varied geographically; moreover, the contrasts were enhanced with higher RCP scenarios. Simulations for climate change adaptation using a high-temperature tolerant cultivar indicated that yield losses could be mitigated, even under the RCP 8.5 scenario. Despite uncertainties in the simulation results, such as future management of nutrient loads and herbivore feeding damages, our projections underscore the potential sustainability and future viability of U. pinnatifida aquaculture in the Seto Inland Sea.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"27 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interactive effects of ocean acidification and nitrate on Ulva lactuca 海洋酸化和硝酸盐对莼菜的交互影响

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-21 DOI: 10.1007/s10811-024-03297-9

Yan Ji, Yingying Jiang, Peng Jin, Jianrong Xia

{"title":"Interactive effects of ocean acidification and nitrate on Ulva lactuca","authors":"Yan Ji, Yingying Jiang, Peng Jin, Jianrong Xia","doi":"10.1007/s10811-024-03297-9","DOIUrl":"https://doi.org/10.1007/s10811-024-03297-9","url":null,"abstract":"The global ocean is undergoing gradual acidification and eutrophication which may have significant impacts on macroalgal communities. However, little is known regarding the interactive effects of ocean acidification (OA) and nitrate on Ulva lactuca, a primary producer widely distributed in coastal waters. This study focuses on the possible interactive effects of OA and elevated nitrate levels on physiological parameters of U. lactuca. Higher nitrate levels may increase growth, photosynthesis, respiration, pigment synthesis, Fv/Fm and Effective Quantum Yield, whereas CO2 enrichment may result in a reduction in photosynthesis, pigment content, Fv/Fm and Effective Quantum Yield. Higher nitrate levels increase NO3- uptake rate and nitrate reductase activity, which are further amplified by elevated CO2 levels. However, the stimulation of high nitrate towards pigment synthesis and photosynthesis is negatively affected by elevated CO2 levels. Our results suggest that U. lactuca could potentially increase its biomass in coastal eutrophic waters, and OA in the future is not expected to promote the growth of U. lactuca, but it can enhance its potential biofiltration to remove nitrate from coastal ecosystems.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"9 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toxic effects of bisphenol analogues and their mixture on two freshwater algae Chlorella vulgaris and Desmodesmus armatus 双酚类似物及其混合物对两种淡水藻类小球藻（Chlorella vulgaris）和甲藻（Desmodesmus armatus）的毒性作用

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-20 DOI: 10.1007/s10811-024-03289-9

Karolina Czarny-Krzymińska, Barbara Krawczyk, Dominik Szczukocki

{"title":"Toxic effects of bisphenol analogues and their mixture on two freshwater algae Chlorella vulgaris and Desmodesmus armatus","authors":"Karolina Czarny-Krzymińska, Barbara Krawczyk, Dominik Szczukocki","doi":"10.1007/s10811-024-03289-9","DOIUrl":"https://doi.org/10.1007/s10811-024-03289-9","url":null,"abstract":"Bisphenol A (BPA) is an emerging organic compound used in the production of epoxy resin, polycarbonate plastics and thermal paper. Following the restrictions on the use of bisphenol A, many substitutes have been produced as its replacement in several consumer products. The main task of this research was to examine the toxic effects of single bisphenol analogues and their mixtures against freshwater microalgae Chlorella vulgaris and Desmodesmus armatus. The findings suggest that bisphenol B, bisphenol C, bisphenol PH (EC50 (14 day): 33.32-43.32 mg L-1) and bisphenol B, bisphenol C, bisphenol FL, bisphenol PH (EC50 (14 day): 30.49-64.54 mg L-1) show strong toxic effects towards C. vulgaris and D. armatus, respectively. In turn, the research results indicate that the toxicity of a mixture of examined bisphenol analogs on both species of green algae is much higher (EC50 (14 day): 24.55-32.68 mg L-1) than the individual toxicity of each component of the mixture. Therefore, it can be concluded that mixtures lead to the occurrence of synergistic effects. The toxicity of the individual bisphenol analogues and their mixture by EC50 (14 day) values in descending order, was as follows: mixture>bisphenol PH> bisphenol B> bisphenol C> bisphenol FL> bisphenol F> bisphenol E for C. vulgaris and bisphenol B> mixture> bisphenol FL> bisphenol C> bisphenol PH> bisphenol E> bisphenol F for D. armatus, respectively. Moreover, the present research expands current knowledge of the ecotoxicological risks of bisphenol analogues to aquatic organisms.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"1 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new autoclave extract from Anabaena minutissima for seed priming improves tomato plantlets growth and protects against soilborne pathogens 一种用于种子处理的新型高压锅提取物，可改善番茄幼苗的生长并防止土传病原体的侵袭

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-20 DOI: 10.1007/s10811-024-03285-z

Hillary Righini, Stefania Galletti, Stefano Cianchetta, Antera Martel Quintana, Ornella Francioso, Roberta Roberti

{"title":"A new autoclave extract from Anabaena minutissima for seed priming improves tomato plantlets growth and protects against soilborne pathogens","authors":"Hillary Righini, Stefania Galletti, Stefano Cianchetta, Antera Martel Quintana, Ornella Francioso, Roberta Roberti","doi":"10.1007/s10811-024-03285-z","DOIUrl":"https://doi.org/10.1007/s10811-024-03285-z","url":null,"abstract":"This study assessed the effectiveness of the treatment of tomato seeds with an aqueous extract of the dried biomass of the microalga Anabaena minutissima in protecting the plants from diseases caused by soilborne pathogens like Rhizoctonia solani and Pythium ultimum. The extract, obtained by an autoclave-assisted method at 100 °C, was rich in proteins and carbohydrates (56.6 and 26.9% of total solids). Preliminary tests were performed revealing: i) a moderate direct activity toward pathogen in vitro growth, with ± 9% stimulation/inhibition, depending on the pathogen; ii) a stimulatory/inhibitory activity toward seedling growth, depending on the dose; iii) no effect on the mycelial growth by root exudates of treated plantlets. Then, a greenhouse experiment was set up to test the response of tomato plants in substrates artificially inoculated with the single pathogens, after seed treatment with the extract at different doses (0, 2.5, 5, and 10 mg mL-1). The treatment generally increased the percentage of standing plants and restored plant development up to the level of healthy controls. Moreover, the disease incidence and severity progressively reduced at increasing doses. Finally, the seed treatment significantly increased some markers of induced systemic resistance like endochitinase and glucanase activity, in hypocotyls of 14-day-old seedlings, compared to non-treated controls. Besides, the treatment increased epicotyls’ carotenoid and chlorophyll a and b content. Overall, these results demonstrate that seed priming with A. minutissima aqueous extract is a promising eco-friendly tool to ameliorate tomato plant responses towards soilborne pathogens, stimulating plant growth and activating induced resistance mechanisms.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"33 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth and fatty acid profile of Nannochloropsis oceanica cultivated on nano-filtered whey permeate 在纳米过滤乳清渗透液上培养的大洋藻的生长和脂肪酸概况

IF 3.3 3区生物学

Journal of Applied Phycology Pub Date : 2024-06-20 DOI: 10.1007/s10811-024-03287-x

Hossein Kiani, Qinge Ma, Mengsong Xiao, Yuchen Li, Felix Joel Brooke, Shane Mulcahy, Svitlana Miros, Ronald Halim

{"title":"Growth and fatty acid profile of Nannochloropsis oceanica cultivated on nano-filtered whey permeate","authors":"Hossein Kiani, Qinge Ma, Mengsong Xiao, Yuchen Li, Felix Joel Brooke, Shane Mulcahy, Svitlana Miros, Ronald Halim","doi":"10.1007/s10811-024-03287-x","DOIUrl":"https://doi.org/10.1007/s10811-024-03287-x","url":null,"abstract":"Nano-filtered whey permeate (WP), a major by-product of dairy industry, is produced by membrane filtration of whey. The oleaginous microalga Nannochloropsis oceanica was successfully cultivated on WP without salinity and nutrient amendments. Growth, cell characteristics, and fatty acid profile of the cultures were analyzed using microscopy, flow cytometry, and GC analysis. WP was nitrogen limited, comprising primarily protein as a nitrogen source and only small amounts of free inorganic nitrogen (in the form of nitrate). Nannochloropsis oceanica (and associated bacteria) efficiently removed nitrate (100%), protein (87%), and phosphate (74%) from the whey permeate. Microscopic and flow cytometric analysis revealed diverse size distributions in whey permeate cultures, with significant cell aggregation attributed to low-salinity acclimatization and nitrogen limitation. Autofluorescence analysis revealed reduced photosynthetic activity in whey permeate-grown cells, possibly as a consequence of heightened mixotrophic activities on carbon source in the medium. Low nitrogen availability in whey permeate resulted in biomass with a fatty acid profile enriched in saturated fatty acids. Despite this, a considerable level of the omega-3 polyunsaturated fatty acid (in the form of eicosapentanoic acid or EPA) was detected at ca. 16% of total fatty acids. Whey permeate proved beneficial for the growth of N. oceanica and yielded high concentrations of eicosapentaenoic acid in the extracted lipids for potential applications in the feed/food industries.","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"44 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0