scholarly journals Neither Endogenous Abscisic Acid nor Endogenous Jasmonate Is Involved in Salicylic Acid-, Yeast Elicitor-, or Chitosan-Induced Stomatal Closure inArabidopsis thaliana

2013 ◽  
Vol 77 (5) ◽  
pp. 1111-1113 ◽  
Author(s):  
Mohammad ISSAK ◽  
Eiji OKUMA ◽  
Shintaro MUNEMASA ◽  
Yoshimasa NAKAMURA ◽  
Izumi C. MORI ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Abscisic Acid ◽  
Stomatal Closure ◽  
Yeast Elicitor ◽  
Endogenous Abscisic Acid

scholarly journals Foliar Accumulation of Melatonin Applied to the Roots of Maize (Zea mays) Seedlings

Biomolecules ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 26 ◽  
Author(s):  
Young Yoon ◽  
Minjae Kim ◽  
Woong Park
Keyword(s):  
Zea Mays ◽  
Salicylic Acid ◽  
Abscisic Acid ◽  
Root System ◽  
Plant Hormones ◽  
Time Course ◽  
Stomatal Closure ◽  
Uptake System ◽  
Regulatory Molecule ◽  
Transpirational Flow

Plants absorb melatonin from the environments as well as they synthesize the regulatory molecule. We applied melatonin to the roots of maize (Zea mays) seedlings and examined its accumulation in the leaves. Melatonin accumulation in the leaves was proportional to the exogenously applied concentrations up to 5 mM, without saturation. Time-course analysis of the accumulated melatonin content did not show an adaptable (or desensitizable) uptake system over a 24-h period. Melatonin accumulation in the leaves was reduced significantly by the plant hormones abscisic acid (ABA) and salicylic acid (SA), which commonly cause stomatal closure. The application of ABA and benzo-18-crown-6 (18-CR, a stomata-closing agent) induced stomatal closure and simultaneously decreased melatonin content in the leaves. When plants were shielded from airflow in the growth chamber, melatonin accumulation in the leaves decreased, indicating the influence of reduced transpiration. We conclude that melatonin applied exogenously to the root system is absorbed, mobilized upward according to the transpirational flow, and finally accumulated in the leaves.

A triazole compound extends the vase life of Geraldton waxflower

1996 ◽  
Vol 36 (1) ◽  
pp. 117
Author(s):  
DC Joyce ◽  
AJ Shorter ◽  
PN Jones
Keyword(s):  
Abscisic Acid ◽  
Water Balance ◽  
Beneficial Effect ◽  
Stomatal Closure ◽  
Vase Life ◽  
Endogenous Abscisic Acid ◽  
Endogenous Aba

A triazole compound, triadimenol, and metluidide were evaluated as vase solution ingredients for Geraldton waxflower. It was anticipated, on the basis of published literature, that these chemicals might induce endogenous abscisic acid (ABA) accumulation and associated stomatal closure, thereby providing an improved water balance. Triadimenol (10 mg/L) generally extended both foliage and flower vase life for the 3 cultivars of Geraldton waxflower studied. However, the increased longevity was associated with greater, rather than less, vase solution usage. Therefore, stomatal closure was not induced, and the beneficial effect was evidently not a function of significantly increased endogenous ABA levels. Mefluidide did not extend the vase life of Geraldton waxflower.

scholarly journals Involvement of Endogenous Abscisic Acid in Methyl Jasmonate-Induced Stomatal Closure in Arabidopsis

2011 ◽  
Vol 156 (1) ◽  
pp. 430-438 ◽  
Author(s):  
Mohammad Anowar Hossain ◽  
Shintaro Munemasa ◽  
Misugi Uraji ◽  
Yoshimasa Nakamura ◽  
Izumi C. Mori ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Methyl Jasmonate ◽  
Stomatal Closure ◽  
Endogenous Abscisic Acid

scholarly journals Members of the abscisic acid co-receptor PP2C protein family mediate salicylic acid-abscisic acid crosstalk

Plant Direct ◽  
2017 ◽  
Vol 1 (5) ◽  
pp. e00020 ◽  
Author(s):  
Murli Manohar ◽  
Dekai Wang ◽  
Patricia M. Manosalva ◽  
Hyong Woo Choi ◽  
Erich Kombrink ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Abscisic Acid ◽  
Protein Family

Inhibition of cambial activity in Abies balsamea by internal water stress: role of abscisic acid

1975 ◽  
Vol 53 (24) ◽  
pp. 3041-3050 ◽  
Author(s):  
C. H. A. Little
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Indoleacetic Acid ◽  
Stomatal Closure ◽  
Abies Balsamea ◽  
Cambial Activity ◽  
Inhibitory Effect ◽  
Internal Water ◽  
Endogenous Aba

In experiments with attached and detached shoots of balsam fir, Abies balsamea L., synthetic (±)abscisic acid (ABA) (1) reduced photosynthesis and transpiration by inducing stomatal closure, (2) inhibited indoleacetic acid (IAA) - induced cambial activity in photosynthesizing and non-photosynthesizing shoots, and (3) inhibited the basipetal movement of [14C]IAA. Neither gibberellic acid nor kinetin counteracted the inhibitory effect of (±)ABA on IAA-induced cambial activity. In addition it was demonstrated that increasing the internal water stress increased the level of endogenous ABA in the phloem–cambial region of bark peelings and decreased the basipetal movement of [14C]IAA through branch sections. On the basis of these findings it is proposed that internal water stress inhibits cambial activity, partly through increasing the level of ABA; the ABA acts to decrease the provision of carbohydrates and auxin that are required for cambial growth.

scholarly journals Arabidopsis NPF4.6 and NPF5.1 Control Leaf Stomatal Aperture by Regulating Abscisic Acid Transport

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 885
Author(s):  
Takafumi Shimizu ◽  
Yuri Kanno ◽  
Hiromi Suzuki ◽  
Shunsuke Watanabe ◽  
Mitsunori Seo
Keyword(s):  
Abscisic Acid ◽  
Plant Hormone ◽  
Leaf Surface ◽  
Stomatal Closure ◽  
Guard Cells ◽  
Cell Types ◽  
Acid Transport ◽  
Wild Type ◽  
Vascular Tissues ◽  
Abscisic Acid Transport

The plant hormone abscisic acid (ABA) is actively synthesized in vascular tissues and transported to guard cells to promote stomatal closure. Although several transmembrane ABA transporters have been identified, how the movement of ABA within plants is regulated is not fully understood. In this study, we determined that Arabidopsis NPF4.6, previously identified as an ABA transporter expressed in vascular tissues, is also present in guard cells and positively regulates stomatal closure in leaves. We also found that mutants defective in NPF5.1 had a higher leaf surface temperature compared to the wild type. Additionally, NPF5.1 mediated cellular ABA uptake when expressed in a heterologous yeast system. Promoter activities of NPF5.1 were detected in several leaf cell types. Taken together, these observations indicate that NPF5.1 negatively regulates stomatal closure by regulating the amount of ABA that can be transported from vascular tissues to guard cells.

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