Drought effects on cellular and spatial parameters of leaf growth in tall fescue

Durand, J. L.; Onillon, B.; Schnyder, H.; Rademacher, I.

doi:10.1093/jxb/46.9.1147

Cited by 76 publications

(42 citation statements)

References 24 publications

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“…1C). Such a sensitivity of an entire growth zone is a common observation in response to environmental stresses, since shortening of the growth zone and decrease of local magnitudes of expansion have been demonstrated in response to a water deficit (Sharp et al, 1988;Durand et al, 1995;Liang et al, 1997), salinity (Bernstein et al, 1995), or various nitrogen regimes (Gastal and Nelson, 1994) in monocot leaves or in roots. The effect of aphid infestation differs from that of water stress in that the longitudinal relative elongation rate is not conserved in apical regions.…”

Section: Pea Aphid Infestation Inhibits Stem Elongation Rates By Shormentioning

confidence: 96%

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Aphid Infestation Causes Different Changes in Carbon and Nitrogen Allocation in Alfalfa Stems as Well as Different Inhibitions of Longitudinal and Radial Expansion

et al. 2005

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Alfalfa (Medicago sativa) stem elongation is strongly reduced by a pea aphid (Acyrthosiphon pisum Harris) infestation. As pea aphid is a phloem feeder that does not transmit virus or toxins, assimilate withdrawal is generally considered as the main mechanism responsible for growth reduction. Using a kinematic analysis, we investigated the spatial distributions of relative elemental growth rates of control and infested alfalfa stems. The water, carbon, and nitrogen contents per unit stem length were measured along the growth zone. Deposition rates and growth-sustaining fluxes were estimated from these patterns. Severe short-term aphid infestation (200 young adults over a 24-h period) induced a strong and synchronized reduction in rates of elongation and of water and carbon deposition. Reduced nitrogen content and associated negative nitrogen deposition rates were observed in some parts of the infested stems, especially in the apex. This suggested a mobilization of nitrogen from the apical part of the growth zone, converted from a sink tissue into a source tissue by aphids. Calculation of radial growth rates suggested that aphid infestation led to a smaller reduction in radial expansion than in elongation. Together with earlier observations of long-lasting effects of a short-term infestation, this supports the hypothesis that in addition to nutrient withdrawal, a thigmomorphogenesis-like mechanism is involved in the effect of aphid infestation on stem growth.

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Section: Pea Aphid Infestation Inhibits Stem Elongation Rates By Shormentioning

confidence: 96%

“…These kinematic studies have also been widely used to study the influence on growth of environmental factors such as light (Schnyder and Nelson, 1989), water deficit (e.g. Durand et al, 1995), various nitrogen regimes (Gastal and Nelson, 1994), and salinity (e.g. Bernstein et al, 1995;Hu et al, 2000).…”

mentioning

confidence: 99%

Aphid Infestation Causes Different Changes in Carbon and Nitrogen Allocation in Alfalfa Stems as Well as Different Inhibitions of Longitudinal and Radial Expansion

et al. 2005

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“…The elongation of leaves between pricking and sampling never exceeded 20% of growth zone length. The REGR was calculated using the method of Durand et al (1995).…”

Section: Relative Elemental Growth Rate (Regr)mentioning

confidence: 99%

Measurement of a growth‐induced water potential gradient in tall fescue leaves

1999

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Spatial distribution of cell turgor pressure, cell osmotic pressure and relative elemental growth rate were measured in growing tall fescue leaves (Festuca arundinacea). Cell turgor pressure (measured with a pressure probe) was c. 0.55 MPa in expanding cells but increased steeply (j0.3 MPa) in cells where elongation had stopped. However, cell osmotic pressure (measured with a picolitre osmometer) was almost constant at 0.85 MPa throughout the leaf. The water potential difference between the growth zone and the mature zone (0.3 MPa) was interpreted as a growth-induced water potential gradient. This and further implications for the mechanism of growth control are discussed.

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“…In a variety of crop species, the reduction in leaf area of plants grown under soil water deficit has been dissected into the underlying dynamic and cellular responses (Durand et al 1995;Lecoeur et al 1995;Ben Haj Salah & Tardieu 1997). General development responses have been identified such as reductions in leaf expansion rate and cell division rate spatially and temporally (Granier & Tardieu 1999;Granier, Inzé & Tardieu 2000), whereas the effects of water deficit on the duration of leaf expansion and cell size are not consistent from one study to another (Rawson & Turner 1982;Granier & Tardieu 1999).…”

Section: Introductionmentioning

confidence: 99%

Plasticity to soil water deficit in Arabidopsis thaliana: dissection of leaf development into underlying growth dynamic and cellular variables reveals invisible phenotypes

Aguirrezábal

Bouchier-Combaud²,

Radziejwoski³

et al. 2006

Plant Cell & Environment

138

125

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Genetic variability in the plasticity of leaf area expansion in response to water deficit has been reported in Arabidopsis thaliana . Here, the objective was to identify the underlying dynamic and cellular processes involved in this variability. Twenty-five accessions were subjected to identical soil water deficit treatments. In all accessions, the plasticity of leaf production was low compared with that of individual leaf expansion. A subset of accessions was selected for further dissection of individual leaf expansion into its underlying variables: the rate and duration of leaf expansion and epidermal cell number and area. In all accessions, water deficit had opposite effects on the rate and duration of leaf expansion. The accumulation of these effects was reflected in changes in final leaf area. At the cellular level, moderate water deficits had opposite effects on cell number and cell size, but more severe ones reduced both variables. The importance of these opposing effects is highlighted by the behaviour of the accession An-1, for which the compensation between the decrease in leaf expansion rate and the increase in the duration of expansion is total. This dynamic plasticity in response to water deficit is not detectable when only final measurements are done.

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Drought effects on cellular and spatial parameters of leaf growth in tall fescue

Cited by 76 publications

References 24 publications

Aphid Infestation Causes Different Changes in Carbon and Nitrogen Allocation in Alfalfa Stems as Well as Different Inhibitions of Longitudinal and Radial Expansion

Aphid Infestation Causes Different Changes in Carbon and Nitrogen Allocation in Alfalfa Stems as Well as Different Inhibitions of Longitudinal and Radial Expansion

Measurement of a growth‐induced water potential gradient in tall fescue leaves

Plasticity to soil water deficit in Arabidopsis thaliana: dissection of leaf development into underlying growth dynamic and cellular variables reveals invisible phenotypes

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