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.

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 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

Abscisic acid analogue effects on the vase life and leaf crisping of cut Baccara roses

2003 ◽  
Vol 43 (4) ◽  
pp. 425 ◽  
Author(s):  
N. E. Pompodakis ◽  
D. C. Joyce
Keyword(s):  
Abscisic Acid ◽  
Transpiration Rate ◽  
Sucrose Concentration ◽  
Stomatal Closure ◽  
Vase Life ◽  
Cut Flowers ◽  
Fresh Weight ◽  
Acid Analogue ◽  
Analytical Reagent

The plant growth regulator abscisic acid induces stomatal closure, which can reduce transpiration rate and extend vase life of cut flowers by maintaining a positive water balance. Analytical-reagent grade abscisic acid is, however, expensive. In this work, the effects of 2 potentially inexpensive synthetic analogues of abscisic acid were studied as to their effects on cut Baccara roses. Abscisic acid and its analogues PBI-365 and PBI-429 reduced transpiration and helped to increase fresh weight during the first few days of vase life. However, the reduction in transpiration rate brought about by abscisic acid and the analogues did not alter vase life. Sucrose in the vase solution at concentrations of 2 and 4% increased vase life of cut Baccara roses. However, the highest sucrose concentration (4%) caused leaf crisping, thereby reducing the quality of the flower stems. Abscisic acid and the analogue PBI-365 reduced this phytotoxicity by induction of stomatal closure and reduction of vase solution sucrose flux into the leaves.

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 Accumulation of Silicon and Changes in Water Balance under Drought Stress in Brassica napus var. napus L.

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 280
Author(s):  
Diana Saja-Garbarz ◽  
Agnieszka Ostrowska ◽  
Katarzyna Kaczanowska ◽  
Franciszek Janowiak
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stomatal Conductance ◽  
Water Balance ◽  
Water Content ◽  
Oilseed Rape ◽  
Potential Evapotranspiration ◽  
Leaf Water Content ◽  
Optimal Conditions ◽  
Abscisic Acid Level

The aim of this study was to investigate the accumulation of silicon in oilseed rape and to characterize the changes in chosen water balance parameters in response to drought. The following parameters were estimated: water content, osmotic and water potential, evapotranspiration, stomatal conductance and abscisic acid level under optimal and drought conditions. It was shown that oilseed rape plants accumulate silicon after its supplementation to the soil, both in the case of silicon alone and silicon together with iron. It was revealed that silicon (without iron) helps maintain constant water content under optimal conditions. While no silicon influence on osmotic regulation was observed, a transpiration decrease was detected under optimal conditions after silicon application. Under drought, a reduction in stomatal conductance was observed, but it was similar for all plants. The decrease in leaf water content under drought was accompanied by a significant increase in abscisic acid content in leaves of control plants and those treated with silicon together with iron. To sum up, under certain conditions, silicon is accumulated even in non-accumulator species, such as oilseed rape, and presumably improves water uptake under drought stress.

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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