Differences of photosynthesis and nutrient utilization in
            <i>Sargassum fusiforme</i>
            and its main epiphyte,
            <i>Ulva lactuca</i>

Tian, Shuaipeng; Zheng, Tingting; Wu, Mingjiang; Cao, Cong; Xu, Lili; Gu, Zongrun; Chen, Binbin; Ma, Zengling

doi:10.1111/are.15830

Cited by 10 publications

(3 citation statements)

References 52 publications

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“…In general, accumulation of soluble proteins in plants is strongly influenced by nitrogen uptake and utilization (Chen et al, 2017a;Chen et al, 2018;Tian et al, 2022). When the RR of S. fusiforme holdfasts was higher, the synthesized SP was used more for the growth of regenerated seedlings, despite the fuller uptake and utilization of nitrogen (Xu et al, 2022b).…”

Section: Discussionmentioning

confidence: 99%

Effects of exogenous hormones on the regeneration of juveniles from Sargassum fusiforme holdfasts

Lin

Zuo²,

Pang³

et al. 2023

Front. Mar. Sci.

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During the cultivation of Sargassum fusiforme, sexual reproduction of superior strains can hinder the stable inheritance of their desirable traits and reduce their economic benefits. However, vegetative reproduction of S. fusiforme holdfasts has high potential for subculture. In this study, we investigated the effects of different concentrations of α-naphthaleneacetic acid (NAA), gibberellin (GA3), and 6-benzyladenine (BAP) on the growth and regeneration of S. fusiforme holdfasts. Exogenous application of 1.5, 2 mg·L-1NAA, 1.5 mg·L-1 GA3 or 2, 3 mg·L-1BAP significantly promoted photosynthetic activity and the absorption and utilization of nitrate nitrogen in S. fusiforme holdfasts, thus improving the relative growth rate (RGR) and regeneration rate (RR) and shortening the time for the regeneration of juveniles from S. fusiforme holdfasts to around the 6th day. Among these, the RGR and RR at the end of the culture period with 1.5 mg·L-1 of NAA increased by 118.9% and 67.4%, respectively, compared with those of the control group. However, treatment with 1.5 mg·L-1 GA3 increased the RR of S. fusiforme holdfasts by 58.8% compared with that of the control group. Under BAP treatment at 3 mg·L-1, the RR of S. fusiforme holdfasts increased by 23.4% compared with that of the control group; its promoting effect was thus weaker than that of NAA and GA3. When the concentration of GA3 or BAP was too high (3 mg·L-1; 5 mg·L-1), the RR of the holdfasts decreased by 46.5% and 42.8%, respectively compared with that of the control group. Therefore, exogenous application of NAA at 1.5 mg·L-1, GA3 at 1.5 mg·L-1, and BAP at 3 mg·L-1 can be used to induce regeneration of S. fusiforme holdfasts, shorten the culture time of regenerated seedlings, and obtain more regenerative seedlings, thereby improving economic efficiency.

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Section: Discussionmentioning

confidence: 99%

Effects of exogenous hormones on the regeneration of juveniles from Sargassum fusiforme holdfasts

Lin

Zuo²,

Pang³

et al. 2023

Front. Mar. Sci.

Self Cite

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“…The genus Ulva presented a curious result: even though green macroalgae (Chlorophyta) was less studied phylum, this genus achieved a great overall percentage (4.9%), being the third most studied genus. The genus Ulva is a foliose or tubular ephemeral alga and high-light adapted alga (Valdivia et al 2012;Tian 2022). Thus, this genus is often considered an opportunistic species (Xu et al 2012) and bloom-forming macroalgae (Nelson et al 2008;Nelson et al 2010).…”

Section: Competition and Macroalgae Taxamentioning

confidence: 99%

Competitive interactions in marine macroalgae: an analysis of the literature by boolean operators

Martins,

Napolitani,

Machado

et al. 2023

OLEL

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Marine macroalgae are the ecological basis in most of the marine environments. Light and space, added to nutrients rank among the most important elements influencing their distribution in the marine environment. Thus, this work aimed to identify and quantify the current and past literature on marine macroalgae competitive interactions and to address the main questions on the competitive patterns and their consequences for community structure, as well as to compare the competitive capacity among different macroalgal taxa. To do so, a quantitative literature search was performed based on papers published from 1934 to 2022, using the following combination of Boolean operators and keywords: “Seaweed OR macroalgae OR macroalga, AND ecolog *, AND competiti *”. A total of 173 articles were then compiled and selected. Our results compiled 124 different macroalgae genera with 546 studied taxa on competition processes. Among them, 38% of the compiled taxa belonged to Ochrophyta; 31% Rhodophyta and 18% Chlorophyta. The most-studied genera were Dictyota (6.8%), Sargassum (6.8%), Ulva (4.9%) and Lobophora (4.2%). Space was the most analyzed limiting factor (40.9%), followed by papers related to herbivory (26.1%), and lastly by competition over nutrients (15.1%). Our results, while attesting to the overarching complexity of competitive interactions, nevertheless allowed us to summarize the current knowledge regarding the patterns of competitive interactions on macroalgae, thus providing a useful synthesis for new perspectives on marine systems and research.

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“…Epiphytic algae could be described as a group of algae that grows attached to the surface of the host seaweed (Arguelles 2019;Jover et al 2020). This would trigger competition for resources, mainly in light and nutrients, which would further effect the growth of commercial seaweed (Tian et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia

PRASEDYA,

FITRIANI,

SARASWATI

et al. 2023

Biodiversitas

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Abstract. Prasedya ES, Fitriani F, Saraswati PBA, Haqiqi N, Qoriasmadillah W, Hikmaturrohmi H, Nurhidayati SZ, Ariati PEP. 2023. Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia. Biodiversitas 24: 5343-5351. The seaweed industry is strategically important in Indonesia, comprising over 40% of the nation's aquaculture annual production. Despite the industry's promising growth, various challenges and problems remain, including intense epiphyte infestation. Hence, investigating the economic value of these epiphytes could provide new opportunities for potential industrial applications. Epiphytic algae is commonly found growing on commercial seaweeds which causes decreased biomass and increased risk of crop failure. Information regarding these epiphytic algae remains limited. This study investigates the molecular identification of the abundant epiphytic macroalgae found in one of the largest seaweed farms in, Seriwe Bay, Lombok, Indonesia. In addition, the epiphytic bioactive activity is also evaluated for further industrial potential. Molecular identification with the mitochondrial marker COX1 identifies the epiphytic macroalgae as Gracilaria edulis (S.G.Gmel.) P.C.Silva. The Indonesian G. edulis is closely related to the G. edulis specimens from Malaysia (JQ026083.1), Philippines (KY995636.1 and KY995635.1), and Thailand (JQ026088.1). The outgroup used was the G. edulis specimen from India (KP099563.1) because it shows the most distinct relationship to the other specimens. Extracted agar of Seriwe G. edulis shows moderate yield (21%) and low gel strength (134 g/cm2). The phytochemical content analyses show that G. edulis agar has a TPC value of 3.65 ± 0.52 mg GAE/g and promising antioxidant activity (DPPH IC50 = 797.40 ± 1.50 µg/mL; ABTS IC50 = 558.40 ± 1.44 µg/mL). Further phytochemical profiling with GCMS shows various promising major constituents such as tetradecanoic acid, neophyte diene, pentadecanoic acid, and hexadecanoic acid. Therefore, the findings suggest that G. edulis displays potential applications in the functional food and cosmetic industry.

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Differences of photosynthesis and nutrient utilization in Sargassum fusiforme and its main epiphyte, Ulva lactuca

Cited by 10 publications

References 52 publications

Effects of exogenous hormones on the regeneration of juveniles from Sargassum fusiforme holdfasts

Effects of exogenous hormones on the regeneration of juveniles from Sargassum fusiforme holdfasts

Competitive interactions in marine macroalgae: an analysis of the literature by boolean operators

Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia

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