Glucose-6-phosphate dehydrogenase plays a pivotal role in tolerance to drought stress in soybean roots

Liu, Jie; Wang, Xiaomin; Hu, Yanfeng; Hu, Wei; Bi, Yurong

doi:10.1007/s00299-012-1374-1

Cited by 66 publications

(40 citation statements)

References 68 publications

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“…The PPP produces reducing equivalents in the form of NADPH 40 . G6PDH is the first irreversible key enzyme of the PPP and catalyzes the phosphorylation of fructose 41,42 .…”

Section: Discussionmentioning

confidence: 99%

Infection of post-harvest peaches by Monilinia fructicola accelerates sucrose decomposition and stimulates the Embden–Meyerhof–Parnas pathway

Kou¹,

Wei²,

He³

et al. 2018

Hortic Res

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To study the changes in sugar metabolism caused by fungal infection in post-harvest peaches, fruit from two cultivars (‘Baifeng’ and ‘Yulu’) was inoculated with Monilinia fructicola and stored at 10 °C. During disease development, soluble sugar content was monitored, as well as the activities and expression of selected enzymes. Disease progression was accompanied by a decrease in sucrose content and increases in reducing sugars and soluble solids, consistent with higher enzyme activities for acid invertase, neutral invertase and sucrose synthase-cleavage, and lower activities for sucrose synthase-synthesis and sucrose phosphate synthase. Activities of phosphofructokinase, hexokinase, and pyruvate kinase, which are related to hexose metabolism, also increased. These changes stimulate the Embden–Meyerhof–Parnas (EMP) pathway. We conclude that the fungal disease in peach fruit accelerates the decomposition of sucrose, thereby providing more glucose as a substrate to the EMP pathway.

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“…The PPP produces reducing equivalents in the form of NADPH 40 . G6PDH is the first irreversible key enzyme of the PPP and catalyzes the phosphorylation of fructose 41,42 .…”

Section: Discussionmentioning

confidence: 99%

Infection of post-harvest peaches by Monilinia fructicola accelerates sucrose decomposition and stimulates the Embden–Meyerhof–Parnas pathway

Kou¹,

Wei²,

He³

et al. 2018

Hortic Res

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show abstract

“…To support this hypothesis, there is a body of evidence to show that, under specific stress conditions, one or more NADPdehydrogenases are regulated at the level of activity and protein/gene expression (Valderrama et al, 2006;Liu et al, 2007Liu et al, , 2013Marino et al, 2007;Mhamdi et al, 2010;Airaki et al, 2012). Moreover, the importance of some of these NADPdehydrogenases has been confirmed by reverse genetic studies (Scharte et al, 2009;Dal Santo et al, 2012;Voll et al, 2012;Siddappaji et al, 2013).…”

Section: Function Of Nadp-dehydrogenases Under Environmental Stress Cmentioning

confidence: 96%

NADPH-generating dehydrogenases: their role in the mechanism of protection against nitro-oxidative stress induced by adverse environmental conditions

Corpas

Barroso

2014

Front. Environ. Sci.

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NADPH is an essential reductive coenzyme in biosynthetic processes such as cell growth, proliferation, and detoxification in eukaryotic cells. It is required by antioxidative systems such as the ascorbate-glutathione cycle and is also necessary for the generation of superoxide radicals by plant NADPH oxidases and for the generation of nitric oxide (NO) by L-arginine-dependent nitric oxide synthase. This coenzyme is principally re-generated by a group of NADP-dehydrogenases enzymes including glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH), both belonging to the pentose phosphate pathway, the NADP-malic enzyme (NADP-ME), and NADP-isocitrate dehydrogenase (NADP-ICDH). In this study, current perspectives on these enzymes in higher plants under different stress situations are reviewed and it is also pointed out that this group of NADPH-generating dehydrogenases is a key element in supporting the mechanism of response to nitro-oxidative stress situations.

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“…Glucose-6-phosphate dehydrogenase (G6PDH) is the rate-limiting enzyme in the oxidative pentose phosphate pathway. A study on soybean showed that G6PDH plays a central role in maintaining the ROS homeostasis under drought stress through increasing the activities of glutathione reductase (GR), dehydroascorbate reductase (DHAR), and monodehydroascorbate reductase (MDHAR) and the content of GSH and Asc (Liu et al, 2013). In addition, oxidative stresses caused by high light and herbicide, paraquat, can activate antioxidant response in Arabidopsis plants (Sunkar et al, 2006).…”

Section: Possible Mechanisms Underlying Regulation Of Fruit and Seed mentioning

confidence: 99%

“…Among all the ROS species, H 2 O 2 is the most common signaling molecule since it is relatively stable and water-soluble (Bienert et al, 2007; Van Breusegem et al, 2008). Under stress conditions, maintaining ROS at an optimal level can facilitate their beneficial signaling function without causing oxidative damage (Liu et al, 2013). As discussed earlier, sugar metabolism plays important roles in maintaining ROS homeostasis.…”

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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Glucose-6-phosphate dehydrogenase plays a pivotal role in tolerance to drought stress in soybean roots

Abstract: KEY MESSAGE : Two soybean cultivars showed markedly different drought tolerance. G6PDH plays a central role in the process of H ( 2 ) O ( 2 ) regulated GR, DHAR, and MDHAR activities to maintain GSH and Asc levels. Glucose-6-phosphate dehydrogenase (… Show more

Cited by 66 publications

References 68 publications

Infection of post-harvest peaches by Monilinia fructicola accelerates sucrose decomposition and stimulates the Embden–Meyerhof–Parnas pathway

Infection of post-harvest peaches by Monilinia fructicola accelerates sucrose decomposition and stimulates the Embden–Meyerhof–Parnas pathway

NADPH-generating dehydrogenases: their role in the mechanism of protection against nitro-oxidative stress induced by adverse environmental conditions

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

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