Phytohormone effects on cell division inChlorella pyrenoidosa chick (TX-7-11-05) (chlorellaceae)

Vance, B. Dwain

doi:10.1007/bf02087185

Cited by 41 publications

(28 citation statements)

References 13 publications

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“…Algal growth was suppressed in the presence of all auxins applied at 100 lM. Our findings correspond to other studies where IAA at high concentration significantly reduced Chlorella pyrenoidosa cell division (Vance 1987). Experiments with synchronous cultures of Chlorella fusca showed growth inhibition when IAA was applied at concentrations higher than 60 lmol dm -3 (Lien et al 1971).…”

Section: Discussionsupporting

confidence: 89%

“…Moreover, application of IAA to microalgae Scenedesmus obliquus and S. armatus cultures resulted in the stimulation of cell division, growth and formation of four-celled rather than two-celled colonies (Mazur et al 2001). Earlier studies with the unicellular desmid Micrasterias thomasiana (Charophyta) (Wood and Berliner 1979) and with C. pyrenoidosa (Chlorophyceae) (Vance 1987), auxin was demonstrated to induce cell division. Kawano (2003) suggested that auxin might promote cell growth through ROS production.…”

Section: Discussionmentioning

confidence: 99%

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The effect of natural and synthetic auxins on the growth, metabolite content and antioxidant response of green alga Chlorella vulgaris (Trebouxiophyceae)

Piotrowska‐Niczyporuk

Bajguz

2013

Plant Growth Regul

161

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The effect of exogenously applied natural [indole-3-acetic acid (IAA), phenylacetic acid (PAA), indole-3-butyric acid (IBA)] and synthetic [1-naphthaleneacetic acid (NAA)] auxins on the growth and metabolism of green microalga Chlorella vulgaris was examined. Exogenous auxins acted in a concentration-dependent manner on algal growth. Phytohormones at concentration of 100 lM inhibited algal growth expressed as the number of cells. IAA and IBA displayed the highest biological activity at 0.1 lM, whereas PAA and NAA were characterized by the greatest stimulatory effect on the number of cells at 1 lM. Treatment with IAA and IBA at 0.1 lM or NAA and PAA at 1 lM increased the concentration of photosynthetic pigments, monosaccharides and soluble proteins in C. vulgaris. Moreover, all auxins stimulated enzymatic (ascorbate peroxidase, catalase, superoxide dismutase) and non-enzymatic antioxidant (ascorbate, glutathione) systems in C. vulgaris, and therefore, suppressed lipid peroxidation and hydrogen peroxide accumulation. The data supports the hypothesis that auxins play a central role in the regulation of C. vulgaris growth and metabolism and the components of cellular redox systems that are thought to have a prominent role in the regulation of auxindependent processes.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

The effect of natural and synthetic auxins on the growth, metabolite content and antioxidant response of green alga Chlorella vulgaris (Trebouxiophyceae)

Piotrowska‐Niczyporuk

Bajguz

2013

Plant Growth Regul

161

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“…To our knowledge, some of the identified enzymes have no other role than hormone biosynthesis in land plants (e.g., ATP/ADP isopentenyltransferase AtIPT, Sterol 1 protein STE1, and DWARF5), while others are also involved in the production of molecules with no hormonal function (e.g., abscisic acid 1 protein [ABA1] and nonphotochemical quenching protein [NPQ1] involved both in the xanthophyll cycle and in the synthesis of ABA precursors). However, the presence of putative orthologs to the Arabidopsis auxin receptor ABP1 in NC64A is congruent with earlier studies demonstrating that auxin induces cell division in Chlorella pyrenoidosa (Vance, 1987) and cell enlargement in Chlorella vulgaris (Yin, 1937), two species closely related to NC64A (see Supplemental Figure 1 analysis suggests that at least some of the genes specifically involved in phytohormone biosynthesis and perception in land plants were established prior to their evolution. Unicellular ancestors of streptophytes and chlorophytes were perhaps able to communicate with each other before the emergence of multicellular land plants.…”

Section: Phytohormones In Algaesupporting

confidence: 88%

The Chlorella variabilis NC64A Genome Reveals Adaptation to Photosymbiosis, Coevolution with Viruses, and Cryptic Sex

et al. 2010

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Chlorella variabilis NC64A, a unicellular photosynthetic green alga (Trebouxiophyceae), is an intracellular photobiont of Paramecium bursaria and a model system for studying virus/algal interactions. We sequenced its 46-Mb nuclear genome, revealing an expansion of protein families that could have participated in adaptation to symbiosis. NC64A exhibits variations in GC content across its genome that correlate with global expression level, average intron size, and codon usage bias. Although Chlorella species have been assumed to be asexual and nonmotile, the NC64A genome encodes all the known meiosis-specific proteins and a subset of proteins found in flagella. We hypothesize that Chlorella might have retained a flagella-derived structure that could be involved in sexual reproduction. Furthermore, a survey of phytohormone pathways in chlorophyte algae identified algal orthologs of Arabidopsis thaliana genes involved in hormone biosynthesis and signaling, suggesting that these functions were established prior to the evolution of land plants. We show that the ability of Chlorella to produce chitinous cell walls likely resulted from the capture of metabolic genes by horizontal gene transfer from algal viruses, prokaryotes, or fungi. Analysis of the NC64A genome substantially advances our understanding of the green lineage evolution, including the genomic interplay with viruses and symbiosis between eukaryotes.

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“…The literature shows that phytohormone supplementation, e.g. with indole-3-acetic acid and gibberellin (Lien et al, 1971;Vance, 1987 ), auxins and cytokinins (Czerpak et al, 1999), kinetin (6-furfurylaminopurine), significantly increases growth and cell division of Chlorella sp. (Li et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Stimulatory effect of indole-3-acetic acid and continuous illumination on the growth of Parachlorella kessleri

Magierek¹,

Krzemińska²,

Tys³

2017

International Agrophysics

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A b s t r a c t. The effects of the phytohormone indole-3-acetic acid and various conditions of illumination on the growth of Parachlorella kessleri were investigated. Two variants of illumination: continuous and photoperiod 16/8 h (light/dark) and two concentrations of the phytohormone -10 -4 M and 10 -5 M of indole-3-acetic acid were used in the experiment. The results of this study show that the addition of the higher concentration of indole-3-acetic acid stimulated the growth of P. kessleri more efficiently than the addition of the lower concentration of indole-3-acetic acid. This dependence can be observed in both variants of illumination. Increased biomass productivity was observed in the photoperiod conditions. Both the addition of the phytohormone and the conditions of the illumination had an impact on the number of P. kessleri cells. An increased number of cells was observed under the conditions of continuous illumination. This result has shown that the continuous illumination and the higher concentration of the phytohormone stimulated the growth of P. kessleri more effectively than the shorter duration of light (16/8 h (light/dark)).K e y w o r d s: light, photoperiod, microalgae, indole-3-acetic acid, Parachlorella kessleri

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Phytohormone effects on cell division inChlorella pyrenoidosa chick (TX-7-11-05) (chlorellaceae)

Cited by 41 publications

References 13 publications

The effect of natural and synthetic auxins on the growth, metabolite content and antioxidant response of green alga Chlorella vulgaris (Trebouxiophyceae)

The effect of natural and synthetic auxins on the growth, metabolite content and antioxidant response of green alga Chlorella vulgaris (Trebouxiophyceae)

The Chlorella variabilis NC64A Genome Reveals Adaptation to Photosymbiosis, Coevolution with Viruses, and Cryptic Sex

Stimulatory effect of indole-3-acetic acid and continuous illumination on the growth of Parachlorella kessleri

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