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Turgor-time controls grass leaf elongation rate and duration under drought stress

Jonas Coussement (UGent) , Selwyn Villers (UGent) , Hilde Nelissen (UGent) , Dirk Inzé (UGent) and Kathy Steppe (UGent)
(2021) PLANT CELL AND ENVIRONMENT. 44(5). p.1361-1378
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Abstract
The process of leaf elongation in grasses is characterized by the creation and transformation of distinct cell zones. The prevailing turgor pressure within these cells is one of the key drivers for the rate at which these cells divide, expand and differentiate, processes that are heavily impacted by drought stress. In this article, a turgor-driven growth model for grass leaf elongation is presented, which combines mechanistic growth from the basis of turgor pressure with the ontogeny of the leaf. Drought-induced reductions in leaf turgor pressure result in a simultaneous inhibition of both cell expansion and differentiation, lowering elongation rate but increasing elongation duration due to the slower transitioning of cells from the dividing and elongating zone to mature cells. Leaf elongation is, therefore, governed by the magnitude of, and time spent under, growth-enabling turgor pressure, a metric which we introduce as turgor-time. Turgor-time is able to normalize growth patterns in terms of varying water availability, similar to how thermal time is used to do so under varying temperatures. Moreover, additional inclusion of temperature dependencies within our model pioneers a novel concept enabling the general expression of growth regardless of water availability or temperature.
Keywords
division, drought stress, elongation, grass, leaf elongation rate, leaf kinetics, mechanistic model, turgor pressure, turgor-driven growth, turgor-time, LOW WATER POTENTIALS, EVAPORATIVE DEMAND, OSMOTIC ADJUSTMENT, TALL FESCUE, YIELD THRESHOLD, DIURNAL GROWTH, CELL-DIVISION, MAIZE, MODEL, TEMPERATURE

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Citation

Please use this url to cite or link to this publication:

MLA
Coussement, Jonas, et al. “Turgor-Time Controls Grass Leaf Elongation Rate and Duration under Drought Stress.” PLANT CELL AND ENVIRONMENT, vol. 44, no. 5, 2021, pp. 1361–78, doi:10.1111/pce.13989.
APA
Coussement, J., Villers, S., Nelissen, H., Inzé, D., & Steppe, K. (2021). Turgor-time controls grass leaf elongation rate and duration under drought stress. PLANT CELL AND ENVIRONMENT, 44(5), 1361–1378. https://doi.org/10.1111/pce.13989
Chicago author-date
Coussement, Jonas, Selwyn Villers, Hilde Nelissen, Dirk Inzé, and Kathy Steppe. 2021. “Turgor-Time Controls Grass Leaf Elongation Rate and Duration under Drought Stress.” PLANT CELL AND ENVIRONMENT 44 (5): 1361–78. https://doi.org/10.1111/pce.13989.
Chicago author-date (all authors)
Coussement, Jonas, Selwyn Villers, Hilde Nelissen, Dirk Inzé, and Kathy Steppe. 2021. “Turgor-Time Controls Grass Leaf Elongation Rate and Duration under Drought Stress.” PLANT CELL AND ENVIRONMENT 44 (5): 1361–1378. doi:10.1111/pce.13989.
Vancouver
1.
Coussement J, Villers S, Nelissen H, Inzé D, Steppe K. Turgor-time controls grass leaf elongation rate and duration under drought stress. PLANT CELL AND ENVIRONMENT. 2021;44(5):1361–78.
IEEE
[1]
J. Coussement, S. Villers, H. Nelissen, D. Inzé, and K. Steppe, “Turgor-time controls grass leaf elongation rate and duration under drought stress,” PLANT CELL AND ENVIRONMENT, vol. 44, no. 5, pp. 1361–1378, 2021.
@article{8686426,
  abstract     = {{The process of leaf elongation in grasses is characterized by the creation and transformation of distinct cell zones. The prevailing turgor pressure within these cells is one of the key drivers for the rate at which these cells divide, expand and differentiate, processes that are heavily impacted by drought stress. In this article, a turgor-driven growth model for grass leaf elongation is presented, which combines mechanistic growth from the basis of turgor pressure with the ontogeny of the leaf. Drought-induced reductions in leaf turgor pressure result in a simultaneous inhibition of both cell expansion and differentiation, lowering elongation rate but increasing elongation duration due to the slower transitioning of cells from the dividing and elongating zone to mature cells. Leaf elongation is, therefore, governed by the magnitude of, and time spent under, growth-enabling turgor pressure, a metric which we introduce as turgor-time. Turgor-time is able to normalize growth patterns in terms of varying water availability, similar to how thermal time is used to do so under varying temperatures. Moreover, additional inclusion of temperature dependencies within our model pioneers a novel concept enabling the general expression of growth regardless of water availability or temperature.}},
  author       = {{Coussement, Jonas and Villers, Selwyn and Nelissen, Hilde and Inzé, Dirk and Steppe, Kathy}},
  issn         = {{0140-7791}},
  journal      = {{PLANT CELL AND ENVIRONMENT}},
  keywords     = {{division,drought stress,elongation,grass,leaf elongation rate,leaf kinetics,mechanistic model,turgor pressure,turgor-driven growth,turgor-time,LOW WATER POTENTIALS,EVAPORATIVE DEMAND,OSMOTIC ADJUSTMENT,TALL FESCUE,YIELD THRESHOLD,DIURNAL GROWTH,CELL-DIVISION,MAIZE,MODEL,TEMPERATURE}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{1361--1378}},
  title        = {{Turgor-time controls grass leaf elongation rate and duration under drought stress}},
  url          = {{http://dx.doi.org/10.1111/pce.13989}},
  volume       = {{44}},
  year         = {{2021}},
}

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