Abscisic acid introduced into the transpiration stream accumulates in the guard‐cell apoplast and causes stomatal closure

Zhang, S. Q.; Outlaw, William H.

doi:10.1046/j.1365-3040.2001.00755.x

Cited by 67 publications

(40 citation statements)

References 73 publications

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“…This confirms the idea that the bulk ABA in a leaf does not necessarily control stomatal aperture. For example, Zhang and Outlaw (2001) showed that stomatal aperture was negatively correlated with the ABA concentration in the apoplast of the guard cells, but not with symplastic ABA.…”

Section: Ethylene-insensitive Plants Have Increased Stomatal Conductancementioning

confidence: 99%

Ethylene Insensitivity Results in Down-Regulation of Rubisco Expression and Photosynthetic Capacity in Tobacco

et al. 2007

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Little is known about the effect of hormones on the photosynthetic process. Therefore, we studied Rubisco content and expression along with gas exchange parameters in transgenic tobacco (Nicotiana tabacum) plants that are not able to sense ethylene. We also tested for a possible interaction between ethylene insensitivity, abscisic acid (ABA), and sugar feedback on photosynthesis. We measured Rubisco content in seedlings grown in agar with or without added sugar and fluridone, and Rubisco expression in hydroponically grown vegetative plants grown at low and high CO 2 . Furthermore, we analyzed gas exchange and the photosynthetic machinery of transformants and wild-type plants grown under standard conditions. In the presence of exogenous glucose (Glc), agar-grown seedlings of the ethylene-insensitive genotype had lower amounts of Rubisco per unit leaf area than the wild type. No differences in Rubisco content were found between ethylene-insensitive and wild-type seedlings treated with fluridone, suggesting that inhibition of ABA production nullified the effect of Glc application. When larger, vegetative plants were grown at different atmospheric CO 2 concentrations, a negative correlation was found between Glc concentration in the leaves and Rubisco gene expression, with stronger repression by high Glc concentrations in ethyleneinsensitive plants. Ethylene insensitivity resulted in plants with comparable fractions of nitrogen invested in light harvesting, but lower amounts in electron transport and Rubisco. Consequently, photosynthetic capacity of the insensitive genotype was clearly lower compared with the wild type. We conclude that the inability to perceive ethylene results in increased sensitivity to Glc, which may be mediated by a higher ABA concentration. This increased sensitivity to endogenous Glc has negative consequences for Rubisco content and photosynthetic capacity of these plants.

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Section: Ethylene-insensitive Plants Have Increased Stomatal Conductancementioning

confidence: 99%

Ethylene Insensitivity Results in Down-Regulation of Rubisco Expression and Photosynthetic Capacity in Tobacco

et al. 2007

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“…Also, abscisic acid (ABA) secreted by Azospirillum lipoferum alleviate water-stress of maize plants. It has been hypothesized that ABA signals the plant to resist water deficiency by controlling stomata closure to reduce water loss [59]. Another stress type, salinity, hinders crop yield of many plants through ethylene biosynthesis [60] that inhibits root growth.…”

Section: Plant Stress Tolerancementioning

confidence: 99%

Exploring the Potential of Endophytes in Agriculture: A Minireview

Yadav¹

2017

APAR

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“…The decrease of water in the soil promoted the increase of the abscisic acid production in the plant, which acts on the stomatal mechanism, being one of the first symptoms of the plants when they perceive the stress (Zhang and Outlaw, 2001). One of the main functions of the ABA is to promote stomatal closure and to avoid the loss of water by transpiration in plants under water deficiency (Sharp et al, 2004).…”

Section: Concentration Of Abscisic Acidmentioning

confidence: 99%

Gas exchange and biomass production in young plants of Acapu (Voucapoua americana Aubl.) subjected to drought condition

Freitas¹,

Cardoso²,

Nogueira³

et al. 2017

Aust J Crop Sci

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The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia (UFRA) from November 2011 to July 2012. The plants were subjected to two water regimes: control (adequate irrigation) and water deficiency (water suspension) for 0, 10, 20 and 30 days period. The water potential in stressed plants was reduced after 30 days of drought. The photosynthetic rate, stomatal conductance and transpiration rate were reduced with increased water stress time in plant with more pronounced reductions in the 20 th and 30 th after induction of treatments. The concentration of ABA increased in leaves and roots of plants submitted to water deficit. Dry mass of shoot, root and total mass were decreased in plants under water stress. The suspension of irrigation for 10 days was sufficient to alter the metabolism of young Acapu plants. These results showed that young Acapu plants tolerate a water potential of up to -2.86 MPa, indicating that this species is not susceptible to water stress/suspension. This condition may favor the development and expansion of Voucapoua americana for the recovery of degraded areas in regions with limited available water.

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Abscisic acid introduced into the transpiration stream accumulates in the guard‐cell apoplast and causes stomatal closure

Cited by 67 publications

References 73 publications

Ethylene Insensitivity Results in Down-Regulation of Rubisco Expression and Photosynthetic Capacity in Tobacco

Ethylene Insensitivity Results in Down-Regulation of Rubisco Expression and Photosynthetic Capacity in Tobacco

Exploring the Potential of Endophytes in Agriculture: A Minireview

Gas exchange and biomass production in young plants of Acapu (Voucapoua americana Aubl.) subjected to drought condition

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