Peach PpSnRK1 Participates in Sucrose-Mediated Root Growth Through Auxin Signaling

Zhang, Shuhui; Peng, Futian; Xiao, Yihong; Wang, Wenru; Wu, Xuelian

doi:10.3389/fpls.2020.00409

Cited by 19 publications

(10 citation statements)

References 67 publications

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“…A recent study in Peach ( Prunus persica ) suggests that SnRK1 plays a vital role in sucrose mediated root growth by modulating auxin signaling (Zhang et al 2020). A plausible mechanism by which SnRK1 exerts downstream regulation is the phosphorylation and activation of the bZIP63.…”

Section: Role Of Sugars and Their Signaling Pathways In Regulation Of...mentioning

confidence: 99%

Role of sugar and auxin crosstalk in plant growth and development

Mishra

Sharma

Laxmi

2021

Physiologia Plantarum

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Under the natural environment, nutrient signals interact with phytohormones to coordinate and reprogram plant growth and survival. Sugars are important molecules that control almost all morphological and physiological processes in plants, ranging from seed germination to senescence. In addition to their functions as energy resources, osmoregulation, storage molecules, and structural components, sugars function as signaling molecules and interact with various plant signaling pathways, such as hormones, stress, and light to modulate growth and development according to fluctuating environmental conditions. Auxin, being an important phytohormone, is associated with almost all stages of the plant's life cycle and also plays a vital role in response to the dynamic environment for better growth and survival. In the previous years, substantial progress has been made that showed a range of common responses mediated by sugars and auxin signaling. This review discusses how sugar signaling affects auxin at various levels from its biosynthesis to perception and downstream gene activation. On the same note, the review also highlights the role of auxin signaling in fine-tuning sugar metabolism and carbon partitioning. Furthermore, we discussed the crosstalk between the two signaling machineries in the regulation of various biological processes, such as gene expression, cell cycle, development, root system architecture, and shoot growth. In conclusion, the review emphasized the role of sugar and auxin crosstalk in the regulation of several agriculturally important traits. Thus, engineering of sugar and auxin signaling pathways could potentially provide new avenues to manipulate for agricultural purposes.

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Section: Role Of Sugars and Their Signaling Pathways In Regulation Of...mentioning

confidence: 99%

Role of sugar and auxin crosstalk in plant growth and development

Mishra

Sharma

Laxmi

2021

Physiologia Plantarum

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“…, branching in main inflorescence, and branching in side inflorescences A functional TPP enzyme acts upstream of the RA1 transcription factor to regulate inflorescence branching(Sun et al, 2016) short-day condition Sugar as a positive element for FT expression(Sun et al, 2016(Sun et al, ) al., 1995Vallarino et al, 2020) Transgenic Solanum tuberosum Accumulation sucrose and glucose Flower approximately 2-4 weeks earlierAntisense suppression of AGPase(Muller-Rober et al, 1992;Vallarino et al, 2020) Leaf senescenceArabidopsisGlucoseWithdrawn of nutrients from the old leaves Signal a reduced requirement for investment in Rubisco and other photosynthetic proteins in the old leaves, releasing nitrogen that would become available for the growth of young leaves and for fruit and seed formation(Khan et al, 2020;Wingler et al, 2009Wingler et al, ) al., 2010Zhang et al, 2020) with auxin and cytokinin to initiate the replication and cell division activity. Sugar also regulates CYCD (CYCLIN D) associated with CDKA in the G 1 inter-phase, whereas it activates TOR kinase to phosphorylate the S6K (ribosomal S6 kinase) associated with RETINOBLASTOMA-RELATED 1 eukaryotic TF 2B and CDKA-CYCD complexes in the S-phase for inducing cell elongation(Chevalier et al, 2014;McCready et al, 2020).…”

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confidence: 99%

Molecular cues of sugar signaling in plants

Choudhary

Kumar

Kaur

et al. 2022

Physiologia Plantarum

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Sugars, the chemically bound form of energy, are formed by the absorption of photosynthetically active radiation and fixation in plants. During evolution, plants availed the sugar molecules as a resource, balancing molecule, and signaling molecule. The multifaceted role of sugar molecules in response to environmental stimuli makes it the central coordinator required for growth, survival, and continuity. During the course of evolution, the molecular networks have become complex to adapt or acclimate to the changing environment. Sugar molecules are sensed both intra and extracellularly by their specific sensors. The signal is transmitted by a signaling loop that involves various downstream signaling molecules, transcriptional factors and, most pertinent, the sensors TOR and SnRK1. In this review, the focus has been retained on the significance of the sugar sensors during signaling and induced modules to regulate plant growth, development, biotic and abiotic stress. It is interesting to visualize the sugar molecule as a signaling unit and not only a nutrient. Complete information on the downstream components of sugar signaling will open the gates for improving the qualitative and quantitative elements of crop plants.

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“…Moreover, along with low sucrose and glucose contents, the growth and development of the infected roots significantly reduced as well (Figure 1E; Supplementary Figure S1 and Table S1). Sucrose and glucose have been known as signaling molecules for promoting root growth and development, including root elongation and lateral root formation [48,49]. Therefore, the low sugar content in roots is likely to be responsible for the PPT phytoplasma-induced root system reduction in size.…”

Section: Discussionmentioning

confidence: 99%

Phytoplasma Infection Blocks Starch Breakdown and Triggers Chloroplast Degradation, Leading to Premature Leaf Senescence, Sucrose Reallocation, and Spatiotemporal Redistribution of Phytohormones

Wei

Inaba

Zhao

et al. 2022

IJMS

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Witches’-broom (WB, excessive initiation, and outgrowth of axillary buds) is one of the remarkable symptoms in plants caused by phytoplasmas, minute wall-less intracellular bacteria. In healthy plants, axillary bud initiation and outgrowth are regulated by an intricate interplay of nutrients (such as sugars), hormones, and environmental factors. However, how these factors are involved in the induction of WB by phytoplasma is poorly understood. We postulated that the WB symptom is a manifestation of the pathologically induced redistribution of sugar and phytohormones. Employing potato purple top phytoplasma and its alternative host tomato (Solanum lycopersicum), sugar metabolism and transportation, and the spatiotemporal distribution of phytohormones were investigated. A transmission electron microscopy (TEM) analysis revealed that starch breakdown was inhibited, resulting in the degradation of damaged chloroplasts, and in turn, premature leaf senescence. In the infected source leaves, two marker genes encoding asparagine synthetase (Sl-ASN) and trehalose-6-phosphate synthase (Sl-TPS) that induce early leaf senescence were significantly up-regulated. However, the key gibberellin biosynthesis gene that encodes ent-kaurene synthase (Sl-KS) was suppressed. The assessment of sugar content in various infected tissues (mature leaves, stems, roots, and leaf axils) indicated that sucrose transportation through phloem was impeded, leading to sucrose reallocation into the leaf axils. Excessive callose deposition and the resulting reduction in sieve pore size revealed by aniline blue staining and TEM provided additional evidence to support impaired sugar transport. In addition, a spatiotemporal distribution study of cytokinin and auxin using reporter lines detected a cytokinin signal in leaf axils where the axillary buds initiated. However, the auxin responsive signal was rarely present in such leaf axils, but at the tips of the newly elongated buds. These results suggested that redistributed sucrose as well as cytokinin in leaf axils triggered the axillary bud initiation, and auxin played a role in the bud elongation. The expression profiles of genes encoding squamosa promoter-binding proteins (Sl-SBP1), and BRANCHED1 (Sl-BRC1a and Sl-BRC1b) that control axillary bud release, as determined by quantitative reverse transcription (qRT)-PCR, indicated their roles in WB induction. However, their interactions with sugars and cytokinins require further study. Our findings provide a comprehensive insight into the mechanisms by which phytoplasmas induce WB along with leaf chlorosis, little leaf, and stunted growth.

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Peach PpSnRK1 Participates in Sucrose-Mediated Root Growth Through Auxin Signaling

Cited by 19 publications

References 67 publications

Role of sugar and auxin crosstalk in plant growth and development

Role of sugar and auxin crosstalk in plant growth and development

Molecular cues of sugar signaling in plants

Phytoplasma Infection Blocks Starch Breakdown and Triggers Chloroplast Degradation, Leading to Premature Leaf Senescence, Sucrose Reallocation, and Spatiotemporal Redistribution of Phytohormones

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