Plant Water Relations

This paper provides a mini-review of evidence for negative turgor pressure in leaf cells starting with experimental evidence in the late 1950s and ending with biomechanical models published in 2014. In the present study, biomechanical models were used to predict how negative turgor pressure might be manifested in dead tissue, and experiments were conducted to test the predictions. The main findings were as follows: (i) Tissues killed by heating to 60 or 80 °C or by freezing in liquid nitrogen all became equally leaky to cell sap solutes and all seemed to pass freely through the cell walls. (ii) Once cell sap solutes could freely pass the cell walls, the shape of pressure-volume curves was dramatically altered between living and dead cells. (iii) Pressure-volume curves of dead tissue seem to measure negative turgor defined as negative when inside minus outside pressure is negative. (iv) Robinia pseudoacacia leaves with small palisade cells had more negative turgor than Metasequoia glyptostroboides with large cells. (v) The absolute difference in negative turgor between R. pseudoacacia and M. glyptostroboides approached as much as 1.0 MPa in some cases. The differences in the manifestation of negative turgor in living versus dead tissue are discussed.

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“…Tyree's contrary opinion was later supported by Markhart et al . (), Kyriakopoulos & Richter () and Lange & Lӧsch ().…”

Section: Introductionmentioning

confidence: 99%

Experimental evidence for negative turgor pressure in small leaf cells of Robinia pseudoacacia L versus large cells of Metasequoia glyptostroboides Hu et W.C.Cheng. 1. Evidence from pressure‐volume curve analysis of dead tissue.

Yang

Pan

et al. 2017

Plant Cell & Environment

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Changes in the water-permeability of roots of some trees during drought stress and recovery, as related to problems of growth in urban environment

Wiersum¹,

Harmanny²

1983

Plant Soil

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SummaryIn relation to problems encountered in the urban environment a study was made of changes in the root's permeability to water of a number of tree species during a drought period, and of water conductivity during recovery. The results suggest than an important reduction of water conductivity occurs as soon as internal water stress builds up. Recovery appears to proceed irregularly. There appear to be differences in response -both as regards extent and speed -among different species.

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Otto Ludwig Lange – 80 years: Eco-physiology – the key to understanding the function and distribution patterns of plants and lichens

Büdel

2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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Plant Water Relations

Cited by 3 publications

References 494 publications

Experimental evidence for negative turgor pressure in small leaf cells of Robinia pseudoacacia L versus large cells of Metasequoia glyptostroboides Hu et W.C.Cheng. 1. Evidence from pressure‐volume curve analysis of dead tissue.

Experimental evidence for negative turgor pressure in small leaf cells of Robinia pseudoacacia L versus large cells of Metasequoia glyptostroboides Hu et W.C.Cheng. 1. Evidence from pressure‐volume curve analysis of dead tissue.

Changes in the water-permeability of roots of some trees during drought stress and recovery, as related to problems of growth in urban environment

Otto Ludwig Lange – 80 years: Eco-physiology – the key to understanding the function and distribution patterns of plants and lichens

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