Heterotrimeric G-proteins in green algae

Hackenberg, Dieter; Pandey, Sona

doi:10.4161/psb.28457

Cited by 25 publications

(14 citation statements)

References 33 publications

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“…Stress hormones JA and ABA in winter cells Hackenberg and Pandey, 58 found heterotrimeric G proteins and ABA, but not JA, in closely related species of Characeae Chara braunii Gmelin. Thus Characeae contain ABA and the G proteins that modulate the plant hormone signal transduction pathways.…”

Section: Change Of Circadian Rhythms In Winter Plantsmentioning

confidence: 98%

Circadian changes in endogenous concentrations of indole-3-acetic acid, melatonin, serotonin, abscisic acid and jasmonic acid in Characeae (Chara australis Brown)

Beilby

Turi

Baker

et al. 2015

Plant Signaling & Behavior

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Giant-celled Characeae (Chara australis Brown), grown for 4 months on 12/12 hr day/night cycle and summer/autumn temperatures, exhibited distinct concentration maxima in auxin (indole-3-acetic acid; IAA), melatonin and serotonin about 4 hr after subjective daybreak. These concentration peaks persisted after 3 day pretreatment in continuous darkness: confirming a circadian rhythm, rather than a response to "light on." The plants pretreated for 3 d in continuous light exhibited several large IAA concentration maxima throughout the 24 hr. The melatonin and serotonin concentrations decreased and were less synchronized with IAA. Chara plants grown on 9/15 hr day/night cycle for 4 months and winter/spring temperatures contained much smaller concentrations of IAA, melatonin and serotonin. The IAA concentration maxima were observed in subjective dark phase. Serotonin concentration peaks were weakly correlated with those of IAA. Melatonin concentration was low and mostly independent of circadian cycle. The "dark" IAA concentration peaks persisted in plants treated for 3 d in the dark. The plants pretreated for 3 d in the light again developed more IAA concentration peaks. In this case the concentration maxima in melatonin and serotonin became more synchronous with those in IAA. The abscisic acid (ABA) and jasmonic acid (JA) concentrations were also measured in plants on winter regime. The ABA concentration did not exhibit circadian pattern, while JA concentration peaks were out of phase with those of IAA. The data are discussed in terms of crosstalk between metabolic pathways.

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Section: Change Of Circadian Rhythms In Winter Plantsmentioning

confidence: 98%

Circadian changes in endogenous concentrations of indole-3-acetic acid, melatonin, serotonin, abscisic acid and jasmonic acid in Characeae (Chara australis Brown)

Beilby

Turi

Baker

et al. 2015

Plant Signaling & Behavior

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“…However, actual (mainly mass spectrometry-based) measurements of JA levels are suggestive of a patchier distribution among land plants and streptophyte algae. For example, while JA is reported to be produced in small quantities in the streptophyte algae K. nitens [94] and Chara australis [118], Hackenberg and Pandey [126] did not detect JA in Chara braunii . Furthermore, Gachet et al [127] did not detect JA in Chara vulgaris and Klebsormidium elegans , while Koeduka et al [128] found only minimal levels of JA in Klebsormidium flaccidum .…”

Section: Evolution Of Phytohormone Defense Networkmentioning

confidence: 99%

On plant defense signaling networks and early land plant evolution

Vries

Dahlen

Gould

et al. 2018

Communicative & Integrative Biology

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All land plants must cope with phytopathogens. Algae face pathogens, too, and it is reasonable to assume that some of the strategies for dealing with pathogens evolved prior to the origin of embryophytes – plant terrestrialization simply changed the nature of the plant-pathogen interactions. Here we highlight that many potential components of the angiosperm defense toolkit are i) found in streptophyte algae and non-flowering embryophytes and ii) might be used in non-flowering plant defense as inferred from published experimental data. Nonetheless, the common signaling networks governing these defense responses appear to have become more intricate during embryophyte evolution. This includes the evolution of the antagonistic signaling pathways of jasmonic and salicylic acid, multiple independent expansions of resistance genes, and the evolution of resistance gene-regulating microRNAs. Future comparative studies will illuminate which modules of the streptophyte defense signaling network constitute the core and which constitute lineage- and/or environment-specific (peripheral) signaling circuits.

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“…Abscisic acid (ABA) presence has been reported in chlorophyte and charophyte green algae (Hirsch et al, 1989;Tietz et al, 1986 andMarsalek et al, 1992;Hackenberg & Pandey, 2014;Hori et al, 2014;Stirk et al, 2014;Beilby et al, 2015;Chokshi et al, 2017) and other organisms (Hartung et al, 2010;Lu et al, 2014;Noble et al, 2014). By contrast, we convincingly detected ABA in only a few charophyte strains, in all cases stationary (older) cultures (Figure S2A), but not in any chlorophytes.…”

Section: Phytohormone Levels In Biomassmentioning

confidence: 53%

Phytohormone profiling in an evolutionary framework

Schmidt

Skokan

Kurtović

et al. 2023

Preprint

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Multiple phytohormones act as conserved developmental regulators in land plants. Although the closely related streptophyte green algae typically lack full complements of molecular pathways underlying these responses, scattered reports of endogenous phytohormone production in these organisms exist. In this study, we performed a detailed LC/MS-based analysis of several phytohormones, their precursors and metabolites in all lineages of streptophyte algae. We also included chlorophyte algae and early-diverging land plants as outgroups. Free auxin, tRNA-derived cytokinins and certain phenolics including salicylic acid were found ubiquitously. However, land plants differed from green algae by the consistent detection of abscisic acid and the presence of auxin and cytokinin conjugates and trans-zeatin, supporting the hypotheses that these three phytohormones likely came to regulate development in the ancestral land plant. By contrast, we observed a patchy distribution of jasmonates among streptophytes. We additionaly analyzed the corresponding culture and empty media to account for phytohormone excretion and environmental contamination. Extracellular auxins and cytokinins were frequently detected, while agar constituted a major external source of phenolic compounds. We provide a highly comprehensive evolution-directed screen of phytohormone compound occurrence and thoroughly discuss our data in the context of current plant hormonomics and phylogenomics.

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Heterotrimeric G-proteins in green algae

Cited by 25 publications

References 33 publications

Circadian changes in endogenous concentrations of indole-3-acetic acid, melatonin, serotonin, abscisic acid and jasmonic acid in Characeae (Chara australis Brown)

Circadian changes in endogenous concentrations of indole-3-acetic acid, melatonin, serotonin, abscisic acid and jasmonic acid in Characeae (Chara australis Brown)

On plant defense signaling networks and early land plant evolution

Phytohormone profiling in an evolutionary framework

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