Microbe Associated Molecular Pattern Signaling in Guard Cells

Ye, Wenxiu; Murata, Yoshiyuki

doi:10.3389/fpls.2016.00583

Cited by 27 publications

(25 citation statements)

References 230 publications

(463 reference statements)

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“…It is well-known that several signaling, other than ABA, can modulate stomatal conductance. These include other hormones (jasmonate, salicylic acid, ethylene), polyamines and microbial elicitors, inducing production of nitric oxide (NO) and ROS in guard cells ( Zhang et al, 2001 ; Allègre et al, 2009 ; Srivastava et al, 2009 ; Gayatri et al, 2013 ; Ye and Murata, 2016 ). Hence, it is possible that signals other than ABA, or ABA like molecules ( Spann and Little, 2010 ), might be induced by the treatment provoking the observed partial stomatal closure.…”

Section: Discussionmentioning

confidence: 99%

Ascophyllum nodosum Seaweed Extract Alleviates Drought Stress in Arabidopsis by Affecting Photosynthetic Performance and Related Gene Expression

Scartazza²,

et al. 2017

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Drought represents one of the most relevant abiotic stress affecting growth and yield of crop plants. In order to improve the agricultural productivity within the limited water and land resources, it is mandatory to increase crop yields in presence of unfavorable environmental stresses. The use of biostimulants, often containing seaweed extracts, represents one of the options for farmers willing to alleviate abiotic stress consequences on crops. In this work, we investigated the responses of Arabidopsis plants treated with an extract from the brown alga Ascophyllum nodosum (ANE), under drought stress conditions, demonstrating that ANE positively influences Arabidopsis survival. Pre-treatment with ANE induced a partial stomatal closure, associated with changes in the expression levels of genes involved in ABA-responsive and antioxidant system pathways. The pre-activation of these pathways results in a stronger ability of ANE-treated plants to maintain a better photosynthetic performance compared to untreated plants throughout the dehydration period, combined with a higher capacity to dissipate the excess of energy as heat in the reaction centers of photosystem II. Our results suggest that drought stressed plants treated with ANE are able to maintain a strong stomatal control and relatively higher values of both water use efficiency (WUE) and mesophyll conductance during the last phase of dehydration. Simultaneously, the activation of a pre-induced antioxidant defense system, in combination with a more efficient energy dissipation mechanism, prevents irreversible damages to the photosynthetic apparatus. In conclusion, pre-treatment with ANE is effective to acclimate plants to the incoming stress, promoting an increased WUE and dehydration tolerance.

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Section: Discussionmentioning

confidence: 99%

Ascophyllum nodosum Seaweed Extract Alleviates Drought Stress in Arabidopsis by Affecting Photosynthetic Performance and Related Gene Expression

Scartazza²,

et al. 2017

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“…), which represents a relevant adaptive trait under water‐limited conditions (Scartazza et al , Flexas et al ). Hence, paramylon could represent a potential way to effectively induce ‘stomatal immunity’ (Melotto et al , Ye and Murata ) and, concomitantly, improve WUE and desiccation tolerance, as previously suggested for the non‐protein amino acid β‐aminobutyric acid (BABA) (Du et al ). In order to test this hypothesis, Ψ w and Φ PSII were monitored by removing the hydroponic solution after 96 h of paramylon treatment (Fig.…”

Section: Discussionmentioning

confidence: 88%

The role ofEuglena gracilisparamylon in modulating xylem hormone levels, photosynthesis and water‐use efficiency inSolanum lycopersicumL

Scartazza

Picciarelli

Mariotti

et al. 2017

Physiologia Plantarum

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β-1,3-glucans such as paramylon act as elicitors in plants, modifying the hormonal levels and the physiological responses. Plant hormones affect all phases of the plant life cycle and their responses to environmental stresses, both biotic and abiotic. The aim of this study was to investigate the effects of a root treatment with Euglena gracilis paramylon on xylem hormonal levels, photosynthetic performance and dehydration stress in tomato (Solanum lycopersicum). Paramylon granules were processed to obtain the linear fibrous structures capable to interact with tomato cell membrane. Modulation of hormone levels (abscisic acid, jasmonic acid and salicylic acid) and related physiological responses such as CO assimilation rate, stomatal and mesophyll conductance, intercellular CO concentration, transpiration rate, water-use efficiency, quantum yield of photosystem II and leaf water potential were investigated. The results indicate a clear dose-dependent effect of paramylon on the hormonal content of xylem sap, photosynthetic performance and dehydration tolerance. Paramylon has the capability to enhance plant defense capacity against abiotic stress, such as drought, by modulating the conductance to CO diffusion from air to the carboxylation sites and improving the water-use efficiency.

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“…Additionally, multiple hormones, pathogen effectors, and plant metabolites play important roles in regulating guard cell signaling, as recently reviewed by Arnaud and Hwang (2015) and Ye and Murata (2016).…”

Section: Rlks Play Multiple Roles In Controlling Stomatal Immunitymentioning

confidence: 99%

Bound by Fate: The Role of Reactive Oxygen Species in Receptor-Like Kinase Signaling

et al. 2017

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In plants, receptor-like kinases (RLKs) and extracellular reactive oxygen species (ROS) contribute to the communication between the environment and the interior of the cell. Apoplastic ROS production is a frequent result of RLK signaling in a multitude of cellular processes; thus, by their nature, these two signaling components are inherently linked. However, it is as yet unclear how ROS signaling downstream of receptor activation is executed. In this review, we provide a broad view of the intricate connections between RLKs and ROS signaling and describe the regulatory events that control and coordinate extracellular ROS production. We propose that concurrent initiation of ROS-dependent and -independent signaling linked to RLKs might be a critical element in establishing cellular responses. Furthermore, we discuss the possible ROS sensing mechanisms in the context of the biochemical environment in the apoplast. We suggest that RLK-dependent modulation of apoplastic and intracellular conditions facilitates ROS perception and signaling. Based on data from plant and animal models, we argue that specific RLKs could be components of the ROS sensing machinery or ROS sensors. The importance of the crosstalk between RLK and ROS signaling is discussed in the context of stomatal immunity. Finally, we highlight challenges in the understanding of these signaling processes and provide perspectives for future research.

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Microbe Associated Molecular Pattern Signaling in Guard Cells

Cited by 27 publications

References 230 publications

Ascophyllum nodosum Seaweed Extract Alleviates Drought Stress in Arabidopsis by Affecting Photosynthetic Performance and Related Gene Expression

Ascophyllum nodosum Seaweed Extract Alleviates Drought Stress in Arabidopsis by Affecting Photosynthetic Performance and Related Gene Expression

The role ofEuglena gracilisparamylon in modulating xylem hormone levels, photosynthesis and water‐use efficiency inSolanum lycopersicumL

Bound by Fate: The Role of Reactive Oxygen Species in Receptor-Like Kinase Signaling

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