Cytokinin membrane receptors modulate transcript accumulation of plastid encoded genes

Данилова, М. Н.; Дорошенко, А. С.; Zabrodin, D. A.; Kudryakova, N. V.; Oelmüller, Ralf; Kusnetsov, V. V.

doi:10.1134/s1021443717030062

Cited by 6 publications

(6 citation statements)

References 27 publications

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“…As previously mentioned, increased bCK delays senescence, while C assimilation in As hyperaccumulators is augmented by increased photosynthesis [45,46]. bCKs restored photosynthesis by causing an increase in chlorophyll synthesis [1,2,60,[62][63][64][65][66][67] via the precursor 5-aminolevulonic acid synthesized from Glu [62]. However, if the supply of C assimilated in older leaves is depleted and the difference between the content of C and N is growing, then Asn or Gln accumulate as in our ferns.…”

Section: Plos Onementioning

confidence: 72%

“…This negative C/N ratio can be altered by an increased intensity of photosynthesis. Photosynthesis is controlled by changes in phytohormone homeostasis, by increased bCK content or by the regulation of the homeostasis of individual endogenous CK forms [60,[62][63][64][65][66][67]. Depleted plant metabolism is unable to restore the C/N balance by increasing C assimilation.…”

Section: Plos Onementioning

confidence: 99%

“…Endogenous bCKs and tCKs play a role in plants' adaptation to abiotic stress by regulating photosynthetic parameters [42,43] and AA metabolism [24] after interacting with plant receptors [63,64,70]. An increase in bCK content induces the metabolism of stress antioxidants, delay of senescence and overcoming of stress via increased photosynthetic activity via a change in the unfavourable C/N ratio [2,[62][63][64][65][66][67]. Increased bCK delays senescence, and C assimilation in As hyperaccumulators is increased by the enhanced photosynthetic activity [45,46].…”

Section: Plos Onementioning

confidence: 99%

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Response of cytokinins and nitrogen metabolism in the fronds of Pteris sp. under arsenic stress

et al. 2020

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Given the close relationship between cytokinins (CKs), photosynthesis and nitrogen metabolism, this study assessed the effect of arsenic (As) contamination on these metabolic components in the As-hyperaccumulators Pteris cretica L. var. Albo-lineata (Pc-A) and var. Parkerii (Pc-P) as well as the As-non-hyperaccumulator Pteris straminea Mett. ex Baker (Ps). The ferns were cultivated in a pot experiment for 23 weeks in soil spiked with As at the levels 20 and 100 mg�kg-1. For the purpose of this study, the CKs were placed into five functionally different groups according to their structure and physiological roles: bioactive forms (bCKs; CK free bases); inactive or weakly active forms (dCKs; CK N-glucosides); transport forms (tCKs; CK ribosides); storage forms (sCKs; O-glucosides); and primary products of CK biosynthesis (ppbCKs; CK nucleotides). An important finding was higher CKs total content, accumulation of sCKs and reduction of dCKs in As-hyperaccumulators in contrast to non-hyperaccumulator ferns. A significant depletion of C resources was confirmed in ferns, especially Ps, which was determined by measuring the photosynthetic rate and chlorophyll fluorescence. A fluorescence decrease signified a reduction in the C/N ratio, inducing an increase of bioactive CKs forms in Pc-P and Ps. The impact of As on N utilization was significant in As-hyperaccumulators. The glutamic acid/glutamine ratio, an indicator of primary N assimilation, diminished in all ferns with increased As level in the soil. In conclusion, the results indicate a large phenotypic diversity of Pteris species to As and suggest that the CKs composition and the glutamic acid/glutamine ratio can be used as a tool to diagnose As stress in plants.

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Section: Plos Onementioning

confidence: 72%

Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

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Response of cytokinins and nitrogen metabolism in the fronds of Pteris sp. under arsenic stress

et al. 2020

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“…An exogenous CK treatment can greatly impact plastids’ development and functioning ( Cortleven and Schmülling, 2015 ). Gene expression analyses have corroborated this, by uncovering upregulated plastid-encoded genes upon CK treatment in Arabidopsis and barley ( Brenner et al, 2005 ; Zubo et al, 2008 ; Danilova et al, 2017a , b ; Andreeva et al, 2020 ). In Arabidopsis, upregulated plastid genes include components of cytochrome b6/f ( petA ) and PSII ( PsbG , psbA , and psbl ) ( Brenner et al, 2005 ).…”

Section: Initiation Of Anterograde Regulation By Cksmentioning

confidence: 86%

“…Both machineries consist of protein complexes encoded in the nucleus and plastids. Additionally, CK indirectly affects plastids’ gene expression by upregulating nuclear genes that encode components of their transcription machinery (i.e., phage-type RNA-polymerases, sigma factors, and plastid RNA polymerase-associated proteins; Danilova et al, 2017a ; Andreeva et al, 2020 ). These results imply that CK-coordinated gene expression activity in the nucleus and plastid provides appropriate information for balancing metabolic flows in plastids and cellular functions.…”

Section: Initiation Of Anterograde Regulation By Cksmentioning

confidence: 99%

Interpreting Cytokinin Action as Anterograde Signaling and Beyond

et al. 2021

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Among the major phytohormones, the cytokinin exhibits unique features for its ability to positively affect the developmental status of plastids. Even early on in its research, cytokinins were known to promote plastid differentiation and to reduce the loss of chlorophyll in detached leaves. Since the discovery of the components of cytokinin perception and primary signaling, the genes involved in photosynthesis and plastid differentiation have been identified as those directly targeted by type-B response regulators. Furthermore, cytokinins are known to modulate versatile cellular processes such as promoting the division and differentiation of cells and, in concert with auxin, initiating the de novo formation of shoot apical meristem (SAM) in tissue cultures. Yet how cytokinins precisely participate in such diverse cellular phenomena, and how the associated cellular processes are coordinated as a whole, remains unclear. A plausible presumption that would account for the coordinated gene expression is the tight and reciprocal communication between the nucleus and plastid. The fact that cytokinins affect plastid developmental status via gene expression in both the nucleus and plastid is interpreted here to suggest that cytokinin functions as an initiator of anterograde (nucleus-to-plastid) signaling. Based on this viewpoint, we first summarize the physiological relevance of cytokinins to the coordination of plastid differentiation with de novo shoot organogenesis in tissue culture systems. Next, the role of endogenous cytokinins in influencing plastid differentiation within the SAM of intact plants is discussed. Finally, a presumed plastid-derived signal in response to cytokinins for coupled nuclear gene expression is proposed.

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Photosynthetic acclimation to changing environments

Gjindali

Johnson

2023

Biochemical Society Transactions

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Plants are exposed to environments that fluctuate of timescales varying from seconds to months. Leaves that develop in one set of conditions optimise their metabolism to the conditions experienced, in a process called developmental acclimation. However, when plants experience a sustained change in conditions, existing leaves will also acclimate dynamically to the new conditions. Typically this process takes several days. In this review, we discuss this dynamic acclimation process, focussing on the responses of the photosynthetic apparatus to light and temperature. We briefly discuss the principal changes occurring in the chloroplast, before examining what is known, and not known, about the sensing and signalling processes that underlie acclimation, identifying likely regulators of acclimation.

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Cytokinin membrane receptors modulate transcript accumulation of plastid encoded genes

Cited by 6 publications

References 27 publications

Response of cytokinins and nitrogen metabolism in the fronds of Pteris sp. under arsenic stress

Response of cytokinins and nitrogen metabolism in the fronds of Pteris sp. under arsenic stress

Interpreting Cytokinin Action as Anterograde Signaling and Beyond

Photosynthetic acclimation to changing environments

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