Neutral invertase, hexokinase and mitochondrial ROS homeostasis

Li, Xiang; Li, Yang; Rolland, Filip; Ende, Wim Van den

doi:10.4161/psb.6.10.17036

Cited by 39 publications

(11 citation statements)

References 50 publications

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“…It was reported that in drought-stressed maize ovary tissue, invertase mRNA and protein levels were down-regulated [ 27 ]. In addition, less substrate was available for the mitochondrial hexokinase to generate ADP to maintain coupled electron transport [ 28 ]. At the same time, the available glucose decreases because of the differential expression of glucose transmembrane transporters, which could be sensed by a signaling molecule, as is the case for hexokinase.…”

Section: Resultsmentioning

confidence: 99%

Transcriptome Expression Profiling in Response to Drought Stress in Paulownia australis

Dong

Fan

Zhong

et al. 2014

IJMS

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The response and adaptation to drought remains poorly understood for Paulownia australis. To investigate this issue, transcriptome profiling of four P. australis accessions (two diploid and the other two autotetraploid) under water stress condition were studied using Illumina Genome Analyzer IIx analysis. The current study aimed to identify genes of P. australis metabolism pathways that might be involved in this plant’s response to water deficit. Potted seedlings were subjected to well-watered conditions and drought stress, respectively. More than 290 million raw transcript reads were assembled into 111,660 unigenes, with a mean length of 1013 bp. Clusters of orthologous groups, gene ontology and the Kyoto Encyclopedia of Genes and Genomes annotations analyses were performed on the unigenes. Many differentially expressed genes and several metabolic pathways were identified. Quantitative real-time polymerase chain reaction was used to verify the expression patterns of 14 genes. Our study identified altered gene expression in P. australis induced by drought stress and provided a comprehensive map of drought-responsive genes and pathways in this species. To our knowledge, this is the first publicly available global transcriptome study of P. australis. This study provides a valuable genetic resource for this species.

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Section: Resultsmentioning

confidence: 99%

Transcriptome Expression Profiling in Response to Drought Stress in Paulownia australis

Dong

Fan

Zhong

et al. 2014

IJMS

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“…On one hand, to deal with heat stress, plants have to divert considerable resource to heat shock response to maintain normal structure and function of cells, since the biosynthesis of heat shock proteins (Finka et al, 2012; Mittler et al, 2012), antioxidants (Bolouri-Moghaddam et al, 2010; Xiang et al, 2011), and compatible osmolytes has a high energetic and metabolic cost. This could further deteriorate sugar starvation by competing sugars with reproductive organs (Wahid et al, 2007).…”

Section: Physiological and Molecular Mechanisms Of Controlling Seed Smentioning

confidence: 99%

“…On the other hand, sugar limitation by heat stress often induces the accumulation of reactive oxygen species (ROS) and subsequently oxidative damage of plant cells (Couée et al, 2006; Bolouri-Moghaddam et al, 2010). A continuous and sufficient supply of glucose may maintain the activity of mitochondria-associated hexokinase, which provides sufficient ADP for the mitochondrial electron transport chain to produce ATP, and consequently avoid ROS overproduction (Xiang et al, 2011).…”

Section: Physiological and Molecular Mechanisms Of Controlling Seed Smentioning

confidence: 99%

Heat Stress in Legume Seed Setting: Effects, Causes, and Future Prospects

Liu

Zhu

et al. 2019

Front. Plant Sci.

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Grain legumes provide a rich resource of plant nutrition to human diets and are vital for food security and sustainable cropping. Heat stress during flowering has a detrimental effect on legume seed yield, mainly due to irreversible loss of seed number. To start with, we provide an overview of the developmental and physiological basis of controlling seed setting in response to heat stress. It is shown that every single process of seed setting including male and female gametophyte development, fertilization, and early seed/fruit development is sensitive to heat stress, in particular male reproductive development in legume crops is especially susceptible. A series of physiochemical processes including heat shock proteins, antioxidants, metabolites, and hormones centered with sugar starvation are proposed to play a key role in regulating legume seed setting in response to heat stress. The exploration of the molecular mechanisms underlying reproductive heat tolerance is in its infancy. Medicago truncatula , with a small diploid genome, and well-established transformation system and molecular platforms, has become a valuable model for testing gene function that can be applied to advance the physiological and molecular understanding of legume reproductive heat tolerance.

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“…Another example is that oxidative stress such as that caused by application of H 2 O 2 often increases the expression of ascorbate peroxidases (APXs), enzymes playing important roles in maintaining the plant's antioxidant system. Overexpressing CIN in Arabidopsis protoplasts, however, alleviates the elevation of APX expression upon H 2 O 2 application, which implies that CIN may ameliorate oxidative stress directly (Xiang et al, 2011). Although the majority of these studies were conducted in vegetative tissues, it can be envisaged that sugar metabolism may play positive roles in fruit and seed set through maintaining ROS homeostasis under heat and drought.…”

Section: Possible Mechanisms Underlying Regulation Of Fruit and Seed mentioning

confidence: 99%

Regulation of fruit and seed response to heat and drought by sugars as nutrients and signals

Liu¹,

Offler²,

Ruan³

2013

Front. Plant Sci.

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A large body of evidence shows that sugars function both as nutrients and signals to regulate fruit and seed set under normal and stress conditions including heat and drought. Inadequate sucrose import to, and its degradation within, reproductive organs cause fruit and seed abortion under heat and drought. As nutrients, sucrose-derived hexoses provide carbon skeletons and energy for growth and development of fruits and seeds. Sugar metabolism can also alleviate the impact of stress on fruit and seed through facilitating biosynthesis of heat shock proteins (Hsps) and non-enzymic antioxidants (e.g., glutathione, ascorbic acid), which collectively maintain the integrity of membranes and prevent programmed cell death (PCD) through protecting proteins and scavenging reactive oxygen species (ROS). In parallel, sugars (sucrose, glucose, and fructose), also exert signaling roles through cross-talk with hormone and ROS signaling pathways and by mediating cell division and PCD. At the same time, emerging data indicate that sugar-derived signaling systems, including trehalose-6 phosphate (T6P), sucrose non-fermenting related kinase-1 (SnRK), and the target of rapamycin (TOR) kinase complex also play important roles in regulating plant development through modulating nutrient and energy signaling and metabolic processes, especially under abiotic stresses where sugar availability is low. This review aims to evaluate recent progress of research on abiotic stress responses of reproductive organs focusing on roles of sugar metabolism and signaling and addressing the possible biochemical and molecular mechanism by which sugars regulate fruit and seed set under heat and drought.

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Neutral invertase, hexokinase and mitochondrial ROS homeostasis

Cited by 39 publications

References 50 publications

Transcriptome Expression Profiling in Response to Drought Stress in Paulownia australis

Transcriptome Expression Profiling in Response to Drought Stress in Paulownia australis

Heat Stress in Legume Seed Setting: Effects, Causes, and Future Prospects

Regulation of fruit and seed response to heat and drought by sugars as nutrients and signals

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