Apoplastic calcium executes a shut-down function on plant peroxidases

Plieth, Christoph

doi:10.4161/psb.20007

Cited by 5 publications

(6 citation statements)

References 43 publications

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“…More recently, (Lamport and Várnai 2013) reported that AGPs serve as flexible storage molecules for Ca 2+ suggesting that AGPs are actively involved in signalling events activated by stress because the increase in Ca 2+ is fundamental for cell signalling (Plieth 2012;Osakabe et al 2013). Finally, carbohydrate chains can be hydrolysed by chitinases and the resulting oligosaccharides could also play possible signalling function as suggested during somatic embryogenesis .…”

Section: Salinity Stressmentioning

confidence: 99%

Arabinogalactan proteins: actors or spectators during abiotic and biotic stress in plants?

Mareri

Romi

Cai

2018

Plant Biosystems - An International Journal Dealing with all As

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Arabinogalactan proteins (AGPs) are a family of hydroxyproline-rich glycoproteins (HRGP) ubiquitous in the plant kingdom. They are probably one of the most heterogeneous and complex families of macromolecules, making them able to perform different and multiple functions. Located at the plasma membrane-cell wall interface, AGPs are involved in several processes, from plant growth and development to reproduction. An additional function of AGPs in response to biotic and abiotic stress has been suggested by several studies. The purpose of this review is to summarize critically and analytically the available knowledge on the effects of abiotic stress (low and high temperatures, drought, flooding, anoxia and metal deficiency/toxicity) and biotic stress (bacteria, fungi, nematodes and viruses) on AGPs. A deeper understanding of the role of AGPs during these conditions can be an important tool for understanding AGP biology and for the possible development of efficient breeding strategies.

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Section: Salinity Stressmentioning

confidence: 99%

Arabinogalactan proteins: actors or spectators during abiotic and biotic stress in plants?

Mareri

Romi

Cai

2018

Plant Biosystems - An International Journal Dealing with all As

View full text Add to dashboard Cite

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“…Production of hydrogen peroxide by NADPH oxidase is strongly influenced also by abiotic stress factors as high NaCl concentration and involved in determining tolerance to abiotic stress [ 52 ]. An interesting hypothesis suggests that inhibition of apoplastic peroxidase caused by Ca 2+ depletion leads to H 2 O 2 accumulation further triggering signaling events in response to a variety of stressors [ 53 ]. Assuming all stated above it seems that extracellular ROS accumulation in response to abiotic stressors is tightly regulated by a variety of cell wall bound and plasma membrane enzymes and is crucially important for stress tolerance.…”

Section: Proteins Of the Cell Wallmentioning

confidence: 99%

“…A suggestion that the large carbohydrate chain serves as a source for oligosaccharides that after deglycosylation increase the intracellular osmotic pressure ( Figure 3 ) and decrease the speed of dehydration during osmotic stress was expressed [ 64 ], but even if a possible explanation, it could be still only one of the many roles of AGPs in plant stress response and probably not the main. More recently evidence for AGPs to serve as flexible storage molecules for Ca 2+ ( Figure 3 ) was published [ 65 ] thus suggesting another possible explanation for the stress responsive functions of AGPs as extracellular Ca 2+ concentrations are crucial for various signaling events [ 40 , 53 ]. Finally hydrolysis of the carbohydrate chains by chitinases ( Figure 3 ) and possible signaling function of the resulting oligosaccharides were also suggested in the process of somatic embryogenesis [ 66 ].…”

Section: Proteins Of the Cell Wallmentioning

confidence: 99%

The Role of Plant Cell Wall Proteins in Response to Salt Stress

Zagorchev

Kamenova

Odjakova

2014

The Scientific World Journal

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Contemporary agriculture is facing new challenges with the increasing population and demand for food on Earth and the decrease in crop productivity due to abiotic stresses such as water deficit, high salinity, and extreme fluctuations of temperatures. The knowledge of plant stress responses, though widely extended in recent years, is still unable to provide efficient strategies for improvement of agriculture. The focus of study has been shifted to the plant cell wall as a dynamic and crucial component of the plant cell that could immediately respond to changes in the environment. The investigation of plant cell wall proteins, especially in commercially important monocot crops revealed the high involvement of this compartment in plants stress responses, but there is still much more to be comprehended. The aim of this review is to summarize the available data on this issue and to point out the future areas of interest that should be studied in detail.

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“…For the purpose of plant nutrition this appears negligible except of situations of calcium deficiency. There is, however, a possible influence of local increases in apoplastic calcium concentrations and pH on signaling processes ( Geilfus and Mühling , 2012; Plieth , 2012; Wilkinson and Davies , 1997), which could lead to physiological effects. In addition to calcium, the introduced particles might release an estimated amount of 44 µmol m −2 CO 2 to the leaf intercellular space.…”

Section: Discussionmentioning

confidence: 99%

Stomatal uptake of mineral particles from a sprayed suspension containing an organosilicone surfactant

Kaiser

2014

J. Plant Nutr. Soil Sci.

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Suspensions of insoluble particles are available on the market for foliar fertilizers. The question whether uptake of particles into the leaf interior is possible is under debate. The present study examines stomatal uptake of mineral particles into leaves of Avena sativa after spraying an aqueous suspension of calcium carbonate particles. By choosing a plant species with large stomata, confirming wide open stomata at the time of spraying and using a ''super spreading'' organosilicone surfactant, conditions were optimized for stomatal uptake. Scanning electron microscopical (SEM) examination confirmed particles in the intercellular spaces mostly in the vicinity of stomata. The number and size of particles was larger if leaves were treated with wide open than with closed stomata. The chemical identity of the particles was examined with electron-dispersive x-ray spectrography (EDX), confirming the presence of calcium carbonate particles among other particles of unknown origin. In conclusion, this study provides evidence for surfactant-assisted stomatal uptake of mineral particles from sprayed suspensions in species with large stomata under specific conditions favoring stomatal uptake.

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Apoplastic calcium executes a shut-down function on plant peroxidases

Cited by 5 publications

References 43 publications

Arabinogalactan proteins: actors or spectators during abiotic and biotic stress in plants?

Arabinogalactan proteins: actors or spectators during abiotic and biotic stress in plants?

The Role of Plant Cell Wall Proteins in Response to Salt Stress

Stomatal uptake of mineral particles from a sprayed suspension containing an organosilicone surfactant

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