Regulation of Stomatal Defense by Air Relative Humidity

Panchal, Shweta; Chitrakar, Reejana; Thompson, Blaine K.; Obulareddy, Nisita; Roy, Daipayan; Hambright, William S.; Melotto, Maeli

doi:10.1104/pp.16.00696

Cited by 48 publications

(48 citation statements)

References 69 publications

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“…Syringolin A promotes stomatal opening (Schellenberg et al, 2010). Unlike Pst DC3000, P. syringae pv syringae does not induce an initial stomatal closure on either its bean host or Arabidopsis (Schellenberg et al, 2010;Panchal et al, 2016a). This finding suggests that this bacterium constitutively produces syringolin A and that syringolin A is a stronger signal than the MAMPs produced by P. syringae pv syringae (see discussion on the strength of the signal above) and/or that these plants do not recognize P. syringae pv syringae MAMPs efficiently.…”

Section: Phytotoxinsmentioning

confidence: 97%

“…Contrary to what has been observed for MeJA, the role of JA-Ile as a negative regulator of stomatal defense is strongly supported in the literature. Evidence includes (1) COR, which is a molecular mimic of JA-Ile (Zhao et al, 2003;Staswick and Tiryaki, 2004), induces stomatal opening, and repress pathogen-associated molecular patterntriggered stomatal closure (Mino et al, 1987;Melotto et al, 2006;Zhang et al, 2008;Panchal et al, 2016b); (2) JA-Ile, but not jasmonic acid, induces stomatal opening with the same potency as COR in Ipomea tricolor (Okada et al, 2009); (3) the coronatine insensitive1 (coi1) mutant of Arabidopsis that lacks the functional receptor for both COR and JA-Ile (Sheard et al, 2010) has constitutively smaller stomatal aperture than the wild-type plant (Panchal et al, 2016a).…”

Section: Recognition Of Bacteriamentioning

confidence: 99%

“…In the context of a plant-microbe interaction, stomatal closure or opening appears to depend on the strength of the opposing signals from the plant and the microbe, which could vary depending on the specific plant-microbe combination. For instance, using the same experimental setup and environmental conditions, Panchal et al (2016a) found that high relative humidity negatively affects stomatal defense against P. syringae, whereas Roy et al (2013) demonstrated that two human pathogens, E. coli O157:H7 and Salmonella enterica serovar Typhimurium SL1344, could still induce significant stomatal closure under high relative humidity. Furthermore, increasing the concentration of flg22 (Felix et al, 1999) could override the effect of high humidity on the opening of the stomatal pore (Roy et al, 2013), illustrating that the relative strength of the opposing signals contribute to the final output.…”

Section: Functional Outputmentioning

confidence: 99%

“…light, high humidity) that promote stomatal opening, and pathogens might take advantage and penetrate leaves in these situations. Indeed, high humidity compromises Pst DC3118-triggered stomatal closure (Panchal et al, 2016a). High humidity also decreases guard cell sensitivity to flg22, ABA, and SA (Roy et al, 2013;Panchal et al, 2016a) by simultaneously inducing JA signaling and repressing SA signaling in guard cells (Panchal et al, 2016a).…”

Section: Environmental Conditions That Influence Stomatal Defensementioning

confidence: 99%

“…Indeed, high humidity compromises Pst DC3118-triggered stomatal closure (Panchal et al, 2016a). High humidity also decreases guard cell sensitivity to flg22, ABA, and SA (Roy et al, 2013;Panchal et al, 2016a) by simultaneously inducing JA signaling and repressing SA signaling in guard cells (Panchal et al, 2016a). Interestingly, SA accumulates to higher levels at night and JA accumulates to higher levels during the day in Arabidopsis (Goodspeed et al, 2012;Grundy et al, 2015;Zheng et al, 2015;Inoue and Kinoshita, 2017;Eisenach and de Angeli, 2017;Vialet-Chabrand et al, 2017).…”

Section: Environmental Conditions That Influence Stomatal Defensementioning

confidence: 99%

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Section: Phytotoxinsmentioning

confidence: 97%

Section: Recognition Of Bacteriamentioning

confidence: 99%

Section: Functional Outputmentioning

confidence: 99%

Section: Environmental Conditions That Influence Stomatal Defensementioning

confidence: 99%

Section: Environmental Conditions That Influence Stomatal Defensementioning

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Jiang¹,

Wang²,

Zhang³

et al. 2021

Soil Ecol. Lett.

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Soil-borne plant diseases cause major economic losses globally. This is partly because their epidemiology is difficult to predict in agricultural fields, where multiple environmental factors could determine disease outcomes. Here we used a combination of field sampling and direct experimentation to identify key abiotic and biotic soil properties that can predict the occurrence of bacterial wilt caused by pathogenic Ralstonia solanacearum. By analyzing 139 tomato rhizosphere soils samples isolated from six provinces in China, we first show a clear link between soil properties, pathogen density and plant health. Specifically, disease outcomes were positively associated with soil moisture, bacterial abundance and bacterial community composition. Based on soil properties alone, random forest machine learning algorithm could predict disease outcomes correctly in 75% of cases with soil moisture being the most significant predictor. The importance of soil moisture was validated causally in a controlled greenhouse experiment, where the highest disease incidence was observed at 60% of maximum water holding capacity. Together, our results show that local soil properties can predict disease occurrence across a wider agricultural landscape, and that management of soil moisture could potentially offer a straightforward method for reducing crop losses to R. solanacearum.

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Overview of methods and considerations for the photodynamic inactivation of microorganisms for agricultural applications

Islam,

Sain,

Stark

et al. 2023

Photochem Photobiol Sci

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Antimicrobial resistance in agriculture is a global concern and carries huge financial consequences. Despite that, practical solutions for growers that are sustainable, low cost and environmentally friendly have been sparse. This has created opportunities for the agrochemical industry to develop pesticides with novel modes of action. Recently the use of photodynamic inactivation (PDI), classically used in cancer treatments, has been explored in agriculture as an alternative to traditional chemistries, mainly as a promising new approach for the eradication of pesticide resistant strains. However, applications in the field pose unique challenges and call for new methods of evaluation to adequately address issues specific to PDI applications in plants and challenges faced in the field. The aim of this review is to summarize in vitro, ex vivo, and in vivo/in planta experimental strategies and methods used to test and evaluate photodynamic agents as photo-responsive pesticides for applications in agriculture. The review highlights some of the strategies that have been explored to overcome challenges in the field.

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Regulation of Stomatal Defense by Air Relative Humidity

Cited by 48 publications

References 69 publications

Stomatal Defense a Decade Later

Stomatal Defense a Decade Later

The relative importance of soil moisture in predicting bacterial wilt disease occurrence

Overview of methods and considerations for the photodynamic inactivation of microorganisms for agricultural applications

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