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Pustovoitova, T. N.; Drozdova, I. S.; Zhdanova, N. E.; Zholkevich, V. N.

doi:10.1023/a:1024752219336

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…Along with the inhibition of growth, the suppression of photosynthesis is also a typical response to drought (Pustovoitova and Zholkevich 1992, Tarchevsky 2001, Chaves et al 2009. In our experiment, water stress resulted in a nearly similar decrease in PN and E. These data show that the inhibition of photosynthesis was most likely caused by a stomatal factor.…”

Section: Discussionsupporting

confidence: 75%

Physiological and molecular responses of maize (Zea mays L.) plants to drought and rehydration

Voronin¹,

Maevskaya²,

Nikolaeva³

2019

Photosynt.

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Physiological and molecular responses of maize seedlings (Zea mays L. cv. Troinaya sladost) to 5-d drought and rehydration for 48 h were investigated. Plant water status was determined by a new method of water potential measurement in mesophyll cells' apoplast in substomatal cavity (ψwa). Drought caused the changes in water status, plant growth, the rates of photosynthetic CO2/H2O gas exchange, and metabolism of carbohydrates and proline. The increase in carbohydrate and proline content under drought was observed simultaneously with the decline in ψwa. Rewatering of seedlings for 24 and 48 h resulted in restoration of growth, rapid increase in ψwa as well as in the rates of photosynthetic gas exchange, and a sharp decline in the content of soluble sugars and proline. Data on close correspondence between the changes in osmolyte content and ψwa under drought and recovery support the assumption that osmolytes might participate in regulation of ψwa.

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Section: Discussionsupporting

confidence: 75%

Physiological and molecular responses of maize (Zea mays L.) plants to drought and rehydration

Voronin¹,

Maevskaya²,

Nikolaeva³

2019

Photosynt.

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“…Findings regarding endogenous levels of auxin (IAA) following water stress are contradictory. An increased level of IAA has been reported in leaves of cucumber and in hypocotyls of squash in response to water stress (Sakurai et al 1985;Zholkevich and Pustovoitova 1993) but in another study, cucumber plants exposed to progressive soil drought, showed a decreased level of IAA until the 4th day, while from the 5th day until the 9th day of drought stress, an increased level of IAA accumulated (Pustovoitova et al 2003). In tomato, however, no significant change of IAA accumulation was observed in response to drought stress (Schmelz et al 2003).…”

Section: Auxinsmentioning

confidence: 82%

“…It has been shown that increased cytokinin concentration in the xylem sap promotes stomatal opening and simultaneously decreases sensitivity to ABA (Wilkinson and Davies 2002). Water stress leads to reduced synthesis of cytokinin in roots and its transport to shoot (Pospíšilová 2003;Pustovoitova et al 2003). Conversely, transgenic tobacco plants overexpressing the ZOG1 gene, encoding trans-zeatin o-glucosyltransferase, and exhibiting an increased level of total cytokinin content (total content of O-glucosides of trans-zeatin and cis-zeatin), show a delayed decrease of stomatal aperture in response to water deficit (Havlova et al 2008).…”

Section: Cytokininsmentioning

confidence: 99%

Hormone interactions in stomatal function

2008

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Research in recent years on the biology of guard cells has shown that these specialized cells integrate both extra- and intra-cellular signals in the control of stomatal apertures. Among the phytohormones, abscisic acid (ABA) is one of the key players regulating stomatal function. In addition, auxin, cytokinin, ethylene, brassinosteroids, jasmonates, and salicylic acid also contribute to stomatal aperture regulation. The interaction of multiple hormones can serve to determine the size of stomatal apertures in a condition-specific manner. Here, we discuss the roles of different phytohormones and the effects of their interactions on guard cell physiology and function.

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“…It has been shown that an increased cytokinin concentration in xylem sap promotes stomatal opening and decreases sensitivity to ABA. Drought stress inhibits the synthesis of cytokinins in roots and its transport to shoots, which in turn results in stomatal closure (Pospísilova, 2003; Pustovoitova et al, 2003). However, stomatal response to exogenously applied cytokinins depends on the concentration and cytokinin species (Figure 6).…”

Section: Auxins and Cytokinins – Ambigous Participation In Stomatal Mmentioning

confidence: 99%

Open or Close the Gate – Stomata Action Under the Control of Phytohormones in Drought Stress Conditions

Daszkowska‐Golec¹,

Szarejko²

2013

Front. Plant Sci.

484

309

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Two highly specialized cells, the guard cells that surround the stomatal pore, are able to integrate environmental and endogenous signals in order to control the stomatal aperture and thereby the gas exchange. The uptake of CO2 is associated with a loss of water by leaves. Control of the size of the stomatal aperture optimizes the efficiency of water use through dynamic changes in the turgor of the guard cells. The opening and closing of stomata is regulated by the integration of environmental signals and endogenous hormonal stimuli. The various different factors to which the guard cells respond translates into the complexity of the network of signaling pathways that control stomatal movements. The perception of an abiotic stress triggers the activation of signal transduction cascades that interact with or are activated by phytohormones. Among these, abscisic acid (ABA), is the best-known stress hormone that closes the stomata, although other phytohormones, such as jasmonic acid, brassinosteroids, cytokinins, or ethylene are also involved in the stomatal response to stresses. As a part of the drought response, ABA may interact with jasmonic acid and nitric oxide in order to stimulate stomatal closure. In addition, the regulation of gene expression in response to ABA involves genes that are related to ethylene, cytokinins, and auxin signaling. In this paper, recent findings on phytohormone crosstalk, changes in signaling pathways including the expression of specific genes and their impact on modulating stress response through the closing or opening of stomata, together with the highlights of gaps that need to be elucidated in the signaling network of stomatal regulation, are reviewed.

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Cited by 15 publications

References 4 publications

Physiological and molecular responses of maize (Zea mays L.) plants to drought and rehydration

Physiological and molecular responses of maize (Zea mays L.) plants to drought and rehydration

Hormone interactions in stomatal function

Open or Close the Gate – Stomata Action Under the Control of Phytohormones in Drought Stress Conditions

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