Gibberellins are involved in effect of near‐null magnetic field on Arabidopsis flowering

Xu, Chunxiao; Ye, Yu; Zhang, Yuxia; Li, Yue; Wei, Shufeng

doi:10.1002/bem.22004

Cited by 34 publications

(26 citation statements)

References 44 publications

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“…We then wanted to disclose the physiological mechanism of near-null magnetic field effect on Arabidopsis flowering. In our previous research, we found that GA was involved in the effect of near-null magnetic field on Arabidopsis flowering, and that GA level and GA biosynthetic genes in Arabidopsis were downregulated by near-null magnetic field [Xu et al, 2017]. In our present study, another important plant hormone, auxin, which also plays an important role in Arabidopsis flowering, was investigated to test whether auxin is also involved in the effect of near-null magnetic field on Arabidopsis flowering.…”

Section: Discussionmentioning

confidence: 82%

Suppression of Arabidopsis flowering by near‐null magnetic field is mediated by auxin

Zhang

et al. 2017

Bioelectromagnetics

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We previously found that flowering of Arabidopsis was suppressed by near-null magnetic field, which was related to cryptochrome. Auxin plays an important role in Arabidopsis flowering. To test whether auxin is involved in the suppression of Arabidopsis flowering by near-null magnetic field, we detected auxin level and expressions of auxin transport and signaling genes in wild-type Arabidopsis plants and cryptochrome double mutant, cry1/cry2, grown in near-null magnetic field. We found that indole-3-acetic acid (IAA) level in roots of wild-type plants in near-null magnetic field was significantly increased compared with the local geomagnetic field control, while IAA level in rosettes of 33-day-old wild-type plants in near-null magnetic field was significantly lower than the control. Expressions of three auxin transporter genes, PIN1, PIN3, and PIN7, in wild-type plants were upregulated by near-null magnetic field. Transcript levels of transcriptional repressor genes, IAA1, IAA5, IAA6, IAA16, and IAA19, were significantly higher in wild-type plants in near-null magnetic field than in control plants. However, IAA level and expressions of all the detected genes in cry1/cry2 mutants in near-null magnetic field were similar to controls. Our results suggest that near-null magnetic field affects the distribution of auxin in Arabidopsis by transcriptional upregulation of auxin transporter genes, and that change in distribution of auxin and increased expressions of transcriptional repressor genes result in delay of flowering in Arabidopsis in near-null magnetic field, which are mediated by cryptochrome. Bioelectromagnetics. 39:15-24, 2018.

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Section: Discussionmentioning

confidence: 82%

Suppression of Arabidopsis flowering by near‐null magnetic field is mediated by auxin

Zhang

et al. 2017

Bioelectromagnetics

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“…According to the data of the Table, closest to the primary physical level are studies that report on the involvement of gene expression in magnetoreception, e.g. [80, 108, 120, 123] and [139, 144, 156, 162, 166, 173], with different genes expressing in different situations. This suggests that the MF targets are rather physical and distributed, but they operate as magnetic receptors only in some specific conditions.…”

Section: Resultsmentioning

confidence: 99%

Biological effects of the hypomagnetic field: An analytical review of experiments and theories

2017

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During interplanetary flights in the near future, a human organism will be exposed to prolonged periods of a hypomagnetic field that is 10,000 times weaker than that of Earth’s. Attenuation of the geomagnetic field occurs in buildings with steel walls and in buildings with steel reinforcement. It cannot be ruled out also that a zero magnetic field might be interesting in biomedical studies and therapy. Further research in the area of hypomagnetic field effects, as shown in this article, is capable of shedding light on a fundamental problem in biophysics—the problem of primary magnetoreception. This review contains, currently, the most extensive bibliography on the biological effects of hypomagnetic field. This includes both a review of known experimental results and the putative mechanisms of magnetoreception and their explanatory power with respect to the hypomagnetic field effects. We show that the measured correlations of the HMF effect with HMF magnitude and inhomogeneity and type and duration of exposure are statistically absent. This suggests that there is no general biophysical MF target similar for different organisms. This also suggests that magnetoreception is not necessarily associated with evolutionary developed specific magnetoreceptors in migrating animals and magnetotactic bacteria. Independently, there is nonspecific magnetoreception that is common for all organisms, manifests itself in very different biological observables as mostly random reactions, and is a result of MF interaction with magnetic moments at a physical level—moments that are present everywhere in macromolecules and proteins and can sometimes transfer the magnetic signal at the level of downstream biochemical events. The corresponding universal mechanism of magnetoreception that has been given further theoretical analysis allows one to determine the parameters of magnetic moments involved in magnetoreception—their gyromagnetic ratio and thermal relaxation time—and so to better understand the nature of MF targets in organisms.

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“…In plants, recent reports revealed that variation of MF intensity affects photoreceptor activity (Agliassa et al, 2018b) and light-dependent processes such as leaf movement, stomatal conductance, and chlorophyll content (Galland and Pazur, 2005;Maffei, 2014). Furthermore, changes in the hormone levels, for instance, auxin and gibberellin, as well as a delay in flowering time have also been observed under near null MF (NNMF) conditions (Xu et al, 2012(Xu et al, , 2017(Xu et al, , 2018Agliassa et al, 2018a). Such delayed transition to flowering under NNMF is likely involved in the Angiosperms speciation during GMF reversals (Maffei, 2014;Occhipinti et al, 2014;Bertea et al, 2015), suggesting a possible contribution of the GMF magnitude on plant evolution.…”

Section: Introductionmentioning

confidence: 99%

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

2020

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The Earth's magnetic field, defined as the geomagnetic field (GMF), is an unavoidable environmental factor for all living organisms. Variation in the GMF intensity was found to affect the content of some nutrients and their associated channels and transporters in Arabidopsis thaliana. In this work, we observed that reduction of the GMF to near null magnetic field (NNMF) affects the accumulation of metals in plant tissues, mainly iron (Fe) and zinc (Zn) content, while the content of others metals such as copper (Cu) and manganese (Mn) is not affected. Accordingly, Fe uptake genes were induced in the roots of NNMF-exposed plants and the root Fe reductase activity was affected by transferring GMF-exposed plant to NNMF condition. Under Fe deficiency, NNMF-exposed plants displayed a limitation in the activation of Fe-deficiency induced genes. Such an effect was associated with the strong accumulation of Zn and Cu observed under NNMF conditions. Overall, our results provide evidence on the important role of the GMF on the iron uptake efficiency of plants.

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Gibberellins are involved in effect of near‐null magnetic field on Arabidopsis flowering

Cited by 34 publications

References 44 publications

Suppression of Arabidopsis flowering by near‐null magnetic field is mediated by auxin

Suppression of Arabidopsis flowering by near‐null magnetic field is mediated by auxin

Biological effects of the hypomagnetic field: An analytical review of experiments and theories

The Geomagnetic Field Is a Contributing Factor for an Efficient Iron Uptake in Arabidopsis thaliana

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