Interplay of Water and Nutrient Transport: A Whole-Plant Perspective

Wegner, Lars H.

doi:10.1007/978-3-319-08807-5_5

Cited by 12 publications

(9 citation statements)

References 132 publications

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“…Plants respond to adverse environmental conditions through the synthesis of ABA [37]. Because mineral nutrients are taken up by the roots, the signal pathway for ABA because of nutrient stress would be the same as the pathway of nutrients to the shoot [38]. When ABA is exogenously applied, such as in the current study, similar signals are transduced to mimic adverse environmental conditions, such as nutrient stress.…”

Section: Discussionmentioning

confidence: 79%

Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

2019

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This study examined how abscisic acid (ABA) and calcium (Ca) concentrations in nutrient solution affect concentrations of mineral nutrients in tomato leaves and fruit. Tomato plants were grown in a greenhouse at 25/20 C (day/night) under a 16 h photoperiod. Plants were treated with different concentrations of ABA and Ca. Calcium was applied via the irrigation lines at 60, 90, or 180 mgL−1. ABA was applied as a combination of foliar sprays and root applications. For foliar ABA applications, treatments consisted of deionized (DI) water control (0.0 mg·L−1 ABA) or 500 mg·L−1 ABA. For ABA root applications, treatments consisted of no ABA control (0.0 mg·L−1 ABA) or 50 mg·L−1 ABA applied via the irrigation lines. Results indicate that mineral nutrient concentrations in tomato leaf and fruit tissue varied in connection with each exogenous application of ABA. Variability in mineral nutrient concentration depended on if ABA was applied to the leaf or root tissue. Additionally, increasing Ca treatment concentrations either decreased or did not change mineral nutrients in tomato and fruit tissue. Thus, tomato plants react to acquiring mineral nutrients in numerous mechanisms and, depending on how the applications of exogenous ABA are applied, can have varying effects on these mechanisms.

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Section: Discussionmentioning

confidence: 79%

Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

2019

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“…The N source determines ionic balances in root tissues that in turn affect the intracellular pH of the roots and rhizosphere. Furthermore, the N source will trigger a range of different metabolic responses and impacts the energetic efficiency of N uptake that is generally more costly when assimilating NO 3 − ( Pfautsch et al , 2009 ; Wegner, 2015 ). Ammonium is readily assimilated into organic compounds in roots, while with increasing supply of NO 3 − greater amounts of this inorganic form of N are transported to leaves where they will be reduced.…”

Section: Discussionmentioning

confidence: 99%

“…Assuming mass flow (J) in the xylem and the phloem ( Wegner, 2015 ). the flow of ABA in the xylem (J ABA,xyl ) is given by the flow of nitrogen (J N,xyl ) and the molar ratio [(ABA/N) xyl ]:…”

Section: Methodsmentioning

confidence: 99%

“…ABA could also be synthesized in other organs such as the leaves and fruits ( Wolf et al , 1990 ; Wilkinson and Davies, 2002 ; Dodd, 2005 ; Jiang and Hartung 2008 ; Ikegami et al , 2009 ). Since mineral nutrients are predominantly taken up by the roots, the signal pathway for ABA due to nutrient stress would be the same as the pathway of nutrients to the shoot ( Wegner, 2015 ). Nitrogen (N), phosphorus (P), and potassium (K + ) are essential nutrients for plant functioning, and their limitation can result in stress reactions ( Schachtman and Shin, 2007 ) that involve ABA.…”

Section: Introductionmentioning

confidence: 99%

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ABA flow modelling in Ricinus communis exposed to salt stress and variable nutrition

Peuke¹

2016

Journal of Experimental Botany

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“…Experimental elucidation plausibly requires a likewise diverse array of tools. A detailed concept extending from the molecular level to the whole plant in the field is outlined by Wegner ( 2014b , 2015 ). Interesting reading also is a recently published physicist’s view.…”

Section: Perspectivesmentioning

confidence: 99%

Water ascent in trees and lianas: the cohesion-tension theory revisited in the wake of Otto Renner

Bentrup

2016

Protoplasma

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The cohesion-tension theory of water ascent (C-T) has been challenged over the past decades by a large body of experimental evidence obtained by means of several minimum or non-invasive techniques. The evidence strongly suggests that land plants acquire water through interplay of several mechanisms covered by the multi-force theory of (U. Zimmermann et al. New Phytologist 162: 575–615, 2004). The diversity of mechanisms includes, for instance, water acquisition by inverse transpiration and thermodynamically uphill transmembrane water secretion by cation-chloride cotransporters (L.H. Wegner, Progress in Botany 76:109–141, 2014). This whole plant perspective was opened by Otto Renner at the beginning of the last century who supported experimentally the strictly xylem-bound C-T mechanism, yet anticipated that the water ascent involves both the xylem conduit and parenchyma tissues. The survey also illustrates the known paradigm that new techniques generate new insights, as well as a paradigm experienced by Max Planck that a new scientific idea is not welcomed by the community instantly.

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Interplay of Water and Nutrient Transport: A Whole-Plant Perspective

Cited by 12 publications

References 132 publications

Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

ABA flow modelling in Ricinus communis exposed to salt stress and variable nutrition

Water ascent in trees and lianas: the cohesion-tension theory revisited in the wake of Otto Renner

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