scholarly journals Tree Root Growth and Development. I. Form, Spread, Depth and Periodicity

1990 ◽  
Vol 8 (4) ◽  
pp. 215-220 ◽  
Author(s):  
Edward F. Gilman
Keyword(s):  
Moisture Content ◽  
Root Growth ◽  
Fine Roots ◽  
Growth And Development ◽  
Shoot Growth ◽  
Lateral Roots ◽  
Soil Characteristics ◽  
Soil Conditions ◽  
Urban Landscapes ◽  
Root Growth And Development

Abstract Root form is governed by seedling genetics and soil characteristics including texture, compaction, depth to the water table, fertility, moisture content and other factors. Trees develop lateral roots growing parallel to the surface of the soil. These are generally located in the top 30 cm (12 in) of soil. Fine roots emerge from lateral roots and grow into the soil close to the surface. If soil conditions permit, some trees grow tap and other vertically oriented roots capable of penetrating several feet into the soil. Many trees, particularly those planted in urban landscapes, do not generate tap roots. Lateral roots spread to well beyond the edge of the branches. Their growth in governed by competition from other plants, available water, soil temperature, fertility, stage of shoot growth and other factors.

The key players of the primary root growth and development also function in lateral roots in Arabidopsis

2014 ◽  
Vol 33 (5) ◽  
pp. 745-753 ◽  
Author(s):  
Huiyu Tian ◽  
Yuebin Jia ◽  
Tiantian Niu ◽  
Qianqian Yu ◽  
Zhaojun Ding
Keyword(s):  
Root Growth ◽  
Growth And Development ◽  
Lateral Roots ◽  
Primary Root ◽  
Key Players ◽  
Primary Root Growth ◽  
Root Growth And Development

Regulatory long non-coding RNAs in root growth and development

2021 ◽  
Author(s):  
Thomas Roulé ◽  
Martin Crespi ◽  
Thomas Blein
Keyword(s):  
Root Growth ◽  
Growth And Development ◽  
Environmental Changes ◽  
Lateral Roots ◽  
Primary Root ◽  
Fine Tuning ◽  
Mineral Nutrient ◽  
Plant Responses ◽  
Non Coding Rnas ◽  
Root Growth And Development

As sessile organisms, plants have evolved sophisticated mechanisms of gene regulation to cope with changing environments. Among them, long non-coding RNAs (lncRNAs) are a class of RNAs regulating gene expression at both transcriptional and post-transcriptional levels. They are highly responsive to environmental cues or developmental processes and are generally involved in fine-tuning plant responses to these signals. Roots, in addition to anchoring the plant to the soil, allow it to absorb the major part of its mineral nutrients and water. Furthermore, roots directly sense environmental constraints such as mineral nutrient availability and abiotic or biotic stresses and dynamically adapt their growth and architecture. Here, we review the role of lncRNAs in the control of root growth and development. In particular, we highlight their action in fine-tuning primary root growth and the development of root lateral organs, such as lateral roots and symbiotic nodules. Lastly, we report their involvement in plant response to stresses and the regulation of nutrient assimilation and homeostasis, two processes leading to the modification of root architecture. LncRNAs could become interesting targets in plant breeding programs to subtly acclimate crops to coming environmental changes.

scholarly journals Response of Root Growth and Development to Nitrogen and Potassium Deficiency as well as microRNA-Mediated Mechanism in Peanut (Arachis hypogaea L.)

2021 ◽  
Vol 12 ◽  
Author(s):  
Lijie Li ◽  
Qian Li ◽  
Kyle E. Davis ◽  
Caitlin Patterson ◽  
Sando Oo ◽  
...  
Keyword(s):  
Root Growth ◽  
Arachis Hypogaea ◽  
Root Length ◽  
Growth And Development ◽  
Lateral Root ◽  
Lateral Roots ◽  
Primary Root ◽  
K Deficiency ◽  
N Deficiency ◽  
Root Growth And Development

The mechanism of miRNA-mediated root growth and development in response to nutrient deficiency in peanut (Arachis hypogaea L.) is still unclear. In the present study, we found that both nitrogen (N) and potassium (K) deficiency resulted in a significant reduction in plant growth, as indicated by the significantly decreased dry weight of both shoot and root tissues under N or K deficiency. Both N and K deficiency significantly reduced the root length, root surface area, root volume, root vitality, and weakened root respiration, as indicated by the reduced O2 consuming rate. N deficiency significantly decreased primary root length and lateral root number, which might be associated with the upregulation of miR160, miR167, miR393, and miR396, and the downregulation of AFB3 and GRF. The primary and lateral root responses to K deficiency were opposite to that of the N deficiency condition. The upregulated miR156, miR390, NAC4, ARF2, and AFB3, and the downregulated miR160, miR164, miR393, and SPL10 may have contributed to the growth of primary roots and lateral roots under K deficiency. Overall, roots responded differently to the N or K deficiency stresses in peanuts, potentially due to the miRNA-mediated pathway and mechanism.

scholarly journals Root and Shoot Growth Periodicity of Green Ash, Scarlet Oak, Turkish Hazelnut, and Tree Lilac

1995 ◽  
Vol 120 (2) ◽  
pp. 211-216 ◽  
Author(s):  
J. Roger Harris ◽  
Nina L. Bassuk ◽  
Richard W. Zobel ◽  
Thomas H. Whitlow
Keyword(s):  
Root Growth ◽  
Root Length ◽  
Shoot Growth ◽  
Lateral Roots ◽  
Growth Patterns ◽  
Extension Rate ◽  
Green Ash ◽  
Growth Measurement ◽  
Root And Shoot Growth ◽  
Growth Periodicity

The objectives of this study were to determine root and shoot growth periodicity for established Fraxinus pennsylvanica Marsh. (green ash), Quercus coccinea Muenchh. (scarlet oak), Corylus colurna L. (Turkish hazelnut), and Syringa reticulata (Blume) Hara `Ivory Silk' (tree lilac) trees and to evaluate three methods of root growth periodicity measurement. Two methods were evaluated using a rhizotron. One method measured the extension rate (RE) ofindividual roots, and the second method measured change in root length (RL) against an observation grid. A third method, using periodic counts of new roots present on minirhizotrons (MR), was also evaluated. RE showed the least variability among individual trees. Shoot growth began before or simultaneously with the beginning of root growth for all species with all root growth measurement methods. All species had concurrent shoot and root growth, and no distinct alternating growth patterns were evident when root growth was measured by RE. Alternating root and shoot growth was evident, however, when root growth was measured by RL and MR. RE measured extension rate of larger diameter lateral roots, RL measured increase in root length of all diameter lateral roots and MR measured new root count of all sizes of lateral and vertical roots. Root growth periodicity patterns differed with the measurement method and the types of roots measured.

scholarly journals Influence of biostimulant and substrate volume on root growth and development of scarlet sage (Salvia splendens L.) transplants

2010 ◽  
Vol 55 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Svjetlana Zeljkovic ◽  
Nada Paradjikovic ◽  
Tamara Babic ◽  
Gordana Djuric ◽  
Rodoljub Oljaca ◽  
...  
Keyword(s):  
Root Growth ◽  
Growth And Development ◽  
Untreated Control ◽  
Dry Mass ◽  
Adaptation To Stress ◽  
Plant Adaptation ◽  
Salvia Splendens ◽  
Fresh And Dry Mass ◽  
Root Growth And Development

The influence of biostimulant and substrate volume on scarlet sage transplants growth and development was examined in this investigation. There was one cultivar of scarlet sage used in trial which was transplanted in pots of two different volumes. Plants were treated with biostimulant (Radifarm) in concentration of 0.25% or left untreated (control). During the trial, root and aboveground fresh and dry mass were recorded. Treatment with biostimulant and bigger substrate volume showed good results by increasing investigated parameters. Investigation shows how biostimulant application to scarlet sage transplants production improves growth and development of root and aboveground mass which is important for faster plant adaptation to stress during transplanting.

Sign in / Sign up

Export Citation Format

Share Document