The mechanics of root growth in Granular media

Abdalla, Ashraf Mohamed Ahmed; Hettiaratchi, D.R.P.; Reece, A.R.

doi:10.1016/0021-8634(69)90126-7

Cited by 127 publications

(63 citation statements)

References 1 publication

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“…The root tip generally rounds, becoming concave, the root width behind the meristem increases and the root meristem and the elongation zone shorten (Eavis, 1967;Croser et al, 2000). The data on root thickening behind the root tip demonstrate the effects of long-term mechanical pressure on the root tips (Abdalla et al, 1969;. The growth of roots is reported to be a more sensitive indicator of soil disruption than the growth of the aboveground parts (Singer, 1981;Heilman, 1981) because the reduction of root growth precedes the phase when the extreme soil resistance is achieved (Eavis, 1967;Russell, 1977;Simons & Pope, 1987).…”

Section: Impact Of Compaction On Plant Growthmentioning

confidence: 99%

Soil Compaction - Impact of Harvesters' and Forwarders' Passages on Plant Growth

Gebauer¹,

Neruda²,

Ulrich³

et al. 2012

Sustainable Forest Management - Current Research

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Section: Impact Of Compaction On Plant Growthmentioning

confidence: 99%

Soil Compaction - Impact of Harvesters' and Forwarders' Passages on Plant Growth

Gebauer¹,

Neruda²,

Ulrich³

et al. 2012

Sustainable Forest Management - Current Research

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“…First, in an homogeneous soil considered as an elasto-plastic medium, finite-element analyses have shown that a radial increase of the root will relieve axial stress ahead of the root tip [113][114][115]. This mechanism which reduces the axial resisting pressure of the soil helps the root to continue to grow straight along its axis.…”

Section: C) Does Root Thickening Optimize Penetration?mentioning

confidence: 99%

Physical root–soil interactions

2017

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Abstract. Plant root system development is highly modulated by the physical properties of the soil and especially by its mechanical resistance to penetration. The interplay between the mechanical stresses exerted by the soil and root growth is of particular interest for many communities, in agronomy and soil science as well as in biomechanics and plant morphogenesis. In contrast to aerial organs, roots apices must exert a growth pressure to penetrate strong soils and reorient their growth trajectory to cope with obstacles like stones or hardpans or to follow the tortuous paths of the soil porosity. In this review, we present the main macroscopic investigations of soil-root physical interactions in the field and combine them with simple mechanistic modeling derived from model experiments at the scale of the individual root apex.2

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“…These cells are similar to those used by Abdalla, Hettiaratchi & Reece (1969), Goss (1977), Veen (1982) and Gordon et al (1992) to examine the * To whom correspondence should be addressed. r>-r -l i l TTT l E-mail: imyoun@scri.sari.ac.uk effects of soil strength on root growth.…”

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confidence: 99%

Mechanical impedance of root growth directly reduces leaf elongation rates of cereals

Young¹,

Montagu

Conroy

et al. 1997

New Phytologist

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SUMMARYA dry soil is generally a hard soil. Thus, the effects of water stress and mechanical impedance on plant growth are difficult to separate. To achieve this we have developed a growth cell that allows manipulation of the strength of growth media (i.e. mechanical impedance) without altering the availability of water or nutrients. We monitored leaf elongation rates of barley and wheat seedlings before and after the mechanical impedance to root growth was increased. Results show that a large and rapid reduction (within 10 min) of leaf elongation rates occurred after impedance to the roots was increased. The average reductions for barley and wheat, with associated standard errors, were 22-6% (4-84) and 36-2% (548), respectively. The data are consistent with the hypothesis that mechanical impedance of roots might have a direct negative effect on leaf growth even where nutrients and water are in plentiful supply to the plant. The implications of the rate of the response are examined with respect to the underlying mechanisms controlling root-shoot signalling.

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The mechanics of root growth in Granular media

Cited by 127 publications

References 1 publication

Soil Compaction - Impact of Harvesters' and Forwarders' Passages on Plant Growth

Soil Compaction - Impact of Harvesters' and Forwarders' Passages on Plant Growth

Physical root–soil interactions

Mechanical impedance of root growth directly reduces leaf elongation rates of cereals

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