Growth and carrageenan composition of two populations of the New Zealand carrageenophyte Sarcothalia lanceata (Gigartinaceae, Rhodophyta)

Neill, Kate F.; Nelson, Wendy A.; Hurd, Catriona L.; Falshaw, Ruth

doi:10.1007/s10811-018-1416-3

Cited by 7 publications

(6 citation statements)

References 66 publications

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“…The polysaccharide structure, in turn, depends on various factors, such as the environment [12][13][14][15], the life cycle stage [6,[16][17][18] and macrophyte species [19]. For example, the accumulation of a polysaccharide with a high 3,6-anhydrogalactose amount in Eucheuma isiforme was noted during periods of high illumination [14].…”

Section: Introductionmentioning

confidence: 99%

Carrageenans and Their Oligosaccharides from Red Seaweeds Ahnfeltiopsis flabelliformis and Mastocarpus pacificus (Phyllophoraceae) and Their Antiproliferative Activity

Kravchenko

Menchinskaya

Исаков

et al. 2023

IJMS

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Comparative structural analysis of gelling polysaccharides from A. flabelliformis and M. pacificus belonging to Phyllophoraceae and the effect of their structural features and molecular weight on human colon cancer cell lines (HT-29, DLD-1, HCT-116) was carried out. According to chemical analysis, IR and NMR spectroscopies, M. pacificus produces kappa/iota-carrageenan with a predominance of kappa units and minor amounts of mu and/or nu units, while the polysaccharide from A. flabelliformis is iota/kappa-carrageenan (predominance of iota units) and contains negligible amounts of beta- and nu-carrageenans. Iota/kappa- (Afg-OS) and kappa/iota-oligosaccharides (Mp-OS) were obtained from the original polysaccharides through mild acid hydrolysis. The content of more sulfated iota units in Afg-OS (iota/kappa 7:1) was higher than in Mp-OS (1.0:1.8). The poly- and oligosaccharides up to 1 mg/mL did not show a cytotoxic effect on all tested cell lines. Polysaccharides showed an antiproliferative effect only at 1 mg/mL. Oligosaccharides had a more pronounced effect on HT-29 and HCT-116 cells than the original polymers, while HCT-116 cells were slightly more sensitive to their action. Kappa/iota-oligosaccharides exhibit a greater antiproliferative effect and more strongly decrease the number of colonies forming in HCT-116 cells. At the same time, iota/kappa-oligosaccharides inhibit cell migration more strongly. Kappa/iota-oligosaccharides induce apoptosis in the SubG0 and G2/M phases, while iota/kappa-oligosaccharides in the SubG0 phase.

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Section: Introductionmentioning

confidence: 99%

Carrageenans and Their Oligosaccharides from Red Seaweeds Ahnfeltiopsis flabelliformis and Mastocarpus pacificus (Phyllophoraceae) and Their Antiproliferative Activity

Kravchenko

Menchinskaya

Исаков

et al. 2023

IJMS

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“…In another experiment surveying Sarcothalia lanceata individuals yearly round in nutrient‐limited populations in New Zealand, Neill et al. (2018) observed that haploid males grew faster than diploids whereas haploid females attained larger sizes. However, contrasting with the present results, faster growth of apical meristems in diploid than in haploid fragments has been reported in a short‐term lab experiment also with A. chilense (Guillemin et al.…”

Section: Discussionmentioning

confidence: 99%

“…2017), and in yearly round nutrient‐limited Sarcothalia lanceata populations from New Zealand (Neill et al. 2018).…”

Section: Discussionmentioning

confidence: 99%

“…2012, Neill et al. 2018). Accordingly, a field study we conducted on Agarophyton chilense (previously named Gracilaria chilensis ; Gurgel et al.…”

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confidence: 99%

“…Neill et al. (2018) found that female fronds of Sarcothalia lanceata were longer whereas haploid males were wider and increased their widths faster. In Chondracanthus chamissoi diploid germlings grew faster than haploid germlings, during long day lengths (Gonzalez and Meneses 1996).…”

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confidence: 99%

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Differential Frond Growth in the Isomorphic Haploid–diploid Red Seaweed Agarophyton chilense by Long‐term In Situ Monitoring

Vieira¹,

Engelen

Huanel

et al. 2021

Journal of Phycology

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Conditional differentiation between haploids and diploids has been proposed to drive the evolutionary stability of isomorphic biphasic life cycles. The cost of producing and maintaining genetic information has been posed as a possible driver of this conditional differentiation. Under this hypothesis, haploids benefit over diploids in resource‐limited environments by halving the costs of producing and maintaining DNA. Spared resources can be allocated to enhance survival, growth or fertility. Here we test in the field whether indeed haploids have higher growth rates than diploids. Individuals of the red seaweed Agarophyton chilense, were mapped and followed during 2 years with 4‐month census intervals across different stands within the Valdivia River estuary, Chile. As hypothesized, haploids grew larger and faster than diploids, but this was sex‐dependent. Haploid (gametophyte) females grew twice as large and 15% faster than diploids (tetrasporophytes), whereas haploid males only grew as large and as fast as the maximum obtained by diploids in summer. However, haploid males maintained their maximum sizes and growth rates constant year‐round, while diploids were smaller and had lower growth rates during the winter. In conclusion, our results confirm the conditional differentiation in size and growth between haploids and diploids but also identified important differences between males and females. Besides understanding life cycle evolution, the dynamics of A. chilense frond growth reported informs algal farmers regarding production optimization and should help in determining best planting and harvesting strategies.

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Spore release and germling development on different substrates in the carrageenophyte Sarcothalia crispata from the southwestern Atlantic coast

2018

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Growth and carrageenan composition of two populations of the New Zealand carrageenophyte Sarcothalia lanceata (Gigartinaceae, Rhodophyta)

Cited by 7 publications

References 66 publications

Carrageenans and Their Oligosaccharides from Red Seaweeds Ahnfeltiopsis flabelliformis and Mastocarpus pacificus (Phyllophoraceae) and Their Antiproliferative Activity

Carrageenans and Their Oligosaccharides from Red Seaweeds Ahnfeltiopsis flabelliformis and Mastocarpus pacificus (Phyllophoraceae) and Their Antiproliferative Activity

Differential Frond Growth in the Isomorphic Haploid–diploid Red Seaweed Agarophyton chilense by Long‐term In Situ Monitoring

Spore release and germling development on different substrates in the carrageenophyte Sarcothalia crispata from the southwestern Atlantic coast

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