Shoot phytochrome B modulates reactive oxygen species homeostasis in roots via abscisic acid signaling in <i>Arabidopsis</i>

Ha, Jun‐Ho; Kim, Ju‐Heon; Kim, Sang‐Gyu; Sim, Hee‐Jung; Lee, Gisuk; Halitschke, Rayko; Baldwin, Ian T.; Kim, Jeong‐Il; Park, Chung‐Mo

doi:10.1111/tpj.13902

Cited by 41 publications

(31 citation statements)

References 32 publications

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“…It is known that ABA treatment increases ROS accumulation in plants (Bohmer and Schroeder, ; Ha et al , ). Our results, however, showed that ABA decreased ROS accumulation in salt‐treated hss mutant.…”

Section: Discussionmentioning

confidence: 99%

The cloning and characterization of hypersensitive to salt stress mutant, affected in quinolinate synthase, highlights the involvement of NAD in stress‐induced accumulation of ABA and proline

Wei

Zhuang

et al. 2019

The Plant Journal

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Nicotinamide adenine dinucleotide (NAD), a ubiquitous coenzyme, is required for many physiological reactions and processes. However, it remains largely unknown how NAD affects plant response to salt stress. We isolated a salt-sensitive mutant named hypersensitive to salt stress (hss) from an ethyl methanesulfonate-induced mutation population. A point mutation was identified by MutMap in the encoding region of Quinolinate Synthase (QS) gene required for the de novo synthesis of NAD. This point mutation caused a substitution of amino acid in the highly-conserved NadA domain of QS, resulting in an impairment of NAD biosynthesis in the mutant. Molecular and chemical complementation have restored the response of the hss mutant to salt stress, indicating that the decreased NAD contents in the mutant were responsible for its hypersensitivity to salt stress. Furthermore, the endogenous levels of abscisic acid (ABA) and proline were also reduced in stress-treated hss mutant. The application of ABA or proline could alleviate stress-induced oxidative damage of the mutant and partially rescue its hypersensitivity to salt stress, but not affect NAD concentration. Taken together, our results demonstrated that the NadA domain of QS is important for NAD biosynthesis, and NAD participates in plant response to salt stress by affecting stress-induced accumulation of ABA and proline.

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Section: Discussionmentioning

confidence: 99%

The cloning and characterization of hypersensitive to salt stress mutant, affected in quinolinate synthase, highlights the involvement of NAD in stress‐induced accumulation of ABA and proline

Wei

Zhuang

et al. 2019

The Plant Journal

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“…1 Our recent findings indicate that shoot phyB promotes ABA synthesis in the shoot, and the shoot-derived ABA itself or signals induces root elongation by detoxifying ROS. 10 Consistent with this notion, ROS accumulate in the roots of phyb mutant that exhibits reduced primary root growth upon exposure to long-term light illumination. This entails that shoot ABA itself or as-yet unknown ABA signaling molecule links the shoot phyB-sensed light perception and ROS homeostasis in the underground roots.…”

Section: Textmentioning

confidence: 68%

“…We have previously demonstrated that phyB mediates ABA biosynthesis in the shoots and ABA triggers the expression of PEROXIDASE1 gene by stabilization ABA INSENSITIVE5 transcription factor. 10 Considering the importance of the synchronization and communication between the shoot and root parts, more works are required for further understanding root photomorphogenesis.…”

Section: Textmentioning

confidence: 99%

Abscisic acid-mediated phytochrome B signaling promotes primary root growth in Arabidopsis

Gil

Park

2018

Plant Signaling & Behavior

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Plant photomorphogenic responses have been studied mostly using the shoots, the core part of plant architecture that perceives light for photosynthesis and influences the overall processes of growth and development. While the roots are also known to respond to aboveground light through multiple routes of light signal transduction, root photomorphogenesis has been less highlighted until recently. A long-standing, critical question was how the underground roots are capable of sensing aerial light and how the root-sensed light signals trigger root photomorphogenesis. When the roots are directly exposed to light, reactive oxygen species (ROS) are rapidly produced to promote primary root elongation, which helps the roots to escape from the abnormal growth conditions. However, severe or long-term exposure of the roots to light causes ROS burst, which impose oxidative damages, leading to a reduction of root growth. We have recently found that phytochrome B (phyB) promotes abscisic acid (ABA) biosynthesis in the shoots and the shoot-derived ABA signals mediate ROS detoxification in the roots, lessening the detrimental effects of light on root growth. On the basis of these observations we propose that the phyB-mediated ABA signaling contributes to the shoot-root synchronization that is essential for optimal growth and performance in plants.

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“…It is shown that light regulates the whole process of root formation [12][13][14]. Some factors such as reactive oxygen species, abscisic acid, sugar and auxin, which is involved in light signal pathway are found to affect root development [15][16][17]. IAA is synthesized in vigorous organ under light regulation [18][19], and IAA synthesis depended on light play an criticle role on developmental process of adventitious roots including induction, development and expression of root [20,21].…”

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confidence: 99%

Gene expression profiling reveals light regulation on adventitious root formation in lotus (Nelumbo nucifera Gaertn.)

Cheng¹,

yuyan²,

minrong³

et al. 2020

Preprint

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Background: Lotus is an aquatic horticultural crop, and widely cultivated in most regions of China.Lotus is often used as a kind of an important off-season vegetable with various nutrients. Principle root of lotus is degenerated, and the role of adventitious roots (ARs) is Irreplaceable for plant growth.We found that no ARs could be formed under darkness condition, and high light significantly promote the development of root primordium. Therefore, four libraries with three light intensities were constructed to monitor metabolism changes, especially in IAA and sugar metabolism.Results: We found that ARs formation was significantly affected by light, high light intensity accelerated ARs development. The change of metabolism during ARs formation under different light intensity was evaluated according to gene expression profiling by high-throughput tag-sequencing. It was shown that more than 2.2× 10 4 genes was obtained in each library, and the expression level of most genes were distributed between 1e-01 and 1e+03 (FPKF value). Among these identified genes, 1739, 1683 and 1462 genes were up-regulated, and 1533, 995 and 834 genes were down-regulated in D/CK, E/CK and F/CK libraries respectively. In addition, we also found that 1454 and 478 genes changed expression in D/CK and F/CK libraries when compared D/CK with F/CK libraries. In F/D libraries, the transcriptional level of most differentially expressed genes was between -5~5 fold, and twenty differentially expressed genes were involved in signal transduction pathway. Twenty-eight genes related with IAA response and thirty-five genes involved in sugar metabolism were found to change expression. It was elucidated that IAA content was enhanced after seed germinated, even in darkness condition, which was responsible for ARs formation.Conclusion: The process of ARs formation was very complex, and regulated by multiple factors. The ARs formation was regulated by IAA, even in the dark, induction and developmental process could also be completed. In addition, the genes (36 genes) changed expression level in carbohydrate metabolism showed the third number, so sucrose metabolism was involved in the ARs development (expressed stage) according to genes expression and content change characteristic.

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Shoot phytochrome B modulates reactive oxygen species homeostasis in roots via abscisic acid signaling in Arabidopsis

Cited by 41 publications

References 32 publications

The cloning and characterization of hypersensitive to salt stress mutant, affected in quinolinate synthase, highlights the involvement of NAD in stress‐induced accumulation of ABA and proline

The cloning and characterization of hypersensitive to salt stress mutant, affected in quinolinate synthase, highlights the involvement of NAD in stress‐induced accumulation of ABA and proline

Abscisic acid-mediated phytochrome B signaling promotes primary root growth in Arabidopsis

Gene expression profiling reveals light regulation on adventitious root formation in lotus (Nelumbo nucifera Gaertn.)

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