Root growth response and functioning as an adaptation in water limiting soils

2007 ◽  
pp. 55-72
Author(s):  
W.J. Davies
Keyword(s):  
Root Growth ◽  
Growth Response

Predicting Initial Tall Fescue Root Growth Response to Calcium/Aluminum Solution Concentrations

2009 ◽  
Vol 40 (7-8) ◽  
pp. 1227-1239
Author(s):  
John S. Kruse ◽  
William P. Miller ◽  
Maxim J. Schlossberg ◽  
Daniel Yanosky ◽  
Daniel B. Hall
Keyword(s):  
Root Growth ◽  
Tall Fescue ◽  
Growth Response

scholarly journals Potassium in Root Growth and Development

Plants ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 435 ◽  
Author(s):  
Marek Sustr ◽  
Ales Soukup ◽  
Edita Tylova
Keyword(s):  
Root Growth ◽  
Membrane Trafficking ◽  
Growth Response ◽  
Plant Stress ◽  
Physiological Role ◽  
Mobile Element ◽  
Plant Responses ◽  
Nitrogen And Phosphorus ◽  
Wide Range ◽  
K Transport

Potassium is an essential macronutrient that has been partly overshadowed in root science by nitrogen and phosphorus. The current boom in potassium-related studies coincides with an emerging awareness of its importance in plant growth, metabolic functions, stress tolerance, and efficient agriculture. In this review, we summarized recent progress in understanding the role of K+ in root growth, development of root system architecture, cellular functions, and specific plant responses to K+ shortage. K+ transport is crucial for its physiological role. A wide range of K+ transport proteins has developed during evolution and acquired specific functions in plants. There is evidence linking K+ transport with cell expansion, membrane trafficking, auxin homeostasis, cell signaling, and phloem transport. This places K+ among important general regulatory factors of root growth. K+ is a rather mobile element in soil, so the absence of systemic and localized root growth response has been accepted. However, recent research confirms both systemic and localized growth response in Arabidopsis thaliana and highlights K+ uptake as a crucial mechanism for plant stress response. K+-related regulatory mechanisms, K+ transporters, K+ acquisition efficiency, and phenotyping for selection of K+ efficient plants/cultivars are highlighted in this review.

scholarly journals Dynamics of localised nitrogen supply and relevance for root growth of Vicia faba (‘Fuego’) and Hordeum vulgare (‘Marthe’) in soil

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sebastian R. G. A. Blaser ◽  
Nicolai Koebernick ◽  
Oliver Spott ◽  
Enrico Thiel ◽  
Doris Vetterlein
Keyword(s):  
Hordeum Vulgare ◽  
Root Growth ◽  
Soil Solution ◽  
Vicia Faba ◽  
Growth Response ◽  
Soil Column ◽  
Nitrification Inhibitor ◽  
Solution Chemistry ◽  
Soil Mesocosms ◽  
Solution Studies

Abstract Root growth responds to local differences in N-form and concentration. This is known for artificial systems and assumed to be valid in soil. The purpose of this study is to challenge this assumption for soil mesocosms locally supplied with urea with and without nitrification inhibitor. Soil column experiments with Vicia faba (‘Fuego’) and Hordeum vulgare (‘Marthe’) were performed to investigate soil solution chemistry and root growth response of these two species with contrasting root architectures to the different N-supply simultaneously. Root growth was analysed over time and separately for the fertiliser layer and the areas above and below with X-ray CT (via region growing) and WinRHIZO. Additionally, NO3− and NH4+ in soil and soil solution were analysed. In Vicia faba, no pronounced differences were observed, although CT analysis indicated different root soil exploration for high NH4+. In Hordeum vulgare, high NO3− inhibited lateral root growth while high NH4+ stimulated the formation of first order laterals. The growth response to locally distributed N-forms in soil is species specific and less pronounced than in artificial systems. The combination of soil solution studies and non-invasive imaging of root growth can substantially improve the mechanistic understanding of root responses to different N-forms in soil.

PENGARUH BERBAGAI ZAT PENGATUR TUMBUH (ZPT) TERHADAP PERTUMBUHAN STEK BATANG PULAI RAWA (Alstonia spatulata)

2021 ◽  
Vol 4 (2) ◽  
pp. 198
Author(s):  
Winda Ningsih Pardede ◽  
Gusti Muhammad Hatta ◽  
Damaris Payung
Keyword(s):  
Root Growth ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Growth Response ◽  
Stem Cuttings ◽  
The Third ◽  
Randomized Design ◽  
Plant Stem ◽  
Completely Randomized Design ◽  
Bean Sprouts

Some of the goals that exist in this research are to analyze how the effect of giving Rootone F, giving Rootmost and giving Bean Sprouts Extract to the growth response of stem cuttings in Pulai Rawa (Alstonia spatulata. Growth Regulatory Substances used in this study there are 3 types of treatments such as giving Rootone F as the first treatment, the second treatment is by giving rootmost and by giving Bean Sprouts Extract as the third treatment and in this study there is control as one of the comparison between the differences between Stem cuttings that use Growth Regulatory Substances with no provision of ZPT. In November 2019 until January 2020 this study took place in the shade house of the forestry faculty at Lambung Mangkurat University.  RAL (Completely Randomized Design) The method used in this study is to use with a set of 4 treatments that were repeated 20 times in each treatment, then there were 80 experimental units in this study.  The results obtained in this study showed the effect of various growth regulators which differed to the response of the growth of Pulai Rawa plant stem cuttings.  The provision of rootone F did not affect the growth response while the administration of Growth Regulator Substance Rootmost gave an effect on the response of root growth of Pulai Rawa cuttings (Alstonia spatulata) and by giving Bean Sprout Extract which had an influence on the growth in number of cuttings.Keywords : Growth regulators; Stem cuttings; Pulai Rawa

scholarly journals A screening method to identify genetic variation in root growth response to a salinity gradient

2011 ◽  
Vol 62 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Afrasyab Rahnama ◽  
Rana Munns ◽  
Kazem Poustini ◽  
Michelle Watt
Keyword(s):  
Genetic Variation ◽  
Root Growth ◽  
Growth Response ◽  
Salinity Gradient ◽  
Screening Method

Root growth response of rainfed lowland rice to aerobic conditions in northeastern Thailand

2012 ◽  
Vol 368 (1-2) ◽  
pp. 557-567 ◽  
Author(s):  
Yoichiro Kato ◽  
Ryosuke Tajima ◽  
Koki Homma ◽  
Akiko Toriumi ◽  
Junko Yamagishi ◽  
...  
Keyword(s):  
Root Growth ◽  
Growth Response ◽  
Lowland Rice ◽  
Aerobic Conditions ◽  
Rainfed Lowland ◽  
Northeastern Thailand

scholarly journals Changes in Spruce Growth and Biomass Allocation Following Thinning and Guying Treatments

Forests ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 253 ◽  
Author(s):  
Bruce Nicoll ◽  
Thomas Connolly ◽  
Barry Gardiner
Keyword(s):  
Root Growth ◽  
Growth Response ◽  
Mechanical Strain ◽  
Light Availability ◽  
Wind Loading ◽  
First Year ◽  
Growth Responses ◽  
Cross Sectional ◽  
Structural Roots ◽  
Similar Growth

When forest stands are thinned, the retained trees are exposed to increased light and greater mechanical strain from the wind. The consequent greater availability of photosynthate and localised mechanical strain in stems and roots are both known to increase cambial growth in conifers, but their relative importance has not previously been quantified. Light availability and wind movement were manipulated in a 10-year-old stand of Sitka spruce trees on an exposed upland site. Treatments were “Control”—no change in spacing or wind loading; “Thinned”—light availability and wind loading increased by removing neighbouring trees; “Thinned and guyed”—light increased and wind loading reduced by removing neighbouring trees and guying stems with wires. Twelve trees per treatment were maintained and monitored for four years before harvesting and removal of cross-sectional stem samples from four heights for measurement of radial growth response. Root systems were excavated from each treatment for observations of associated root growth responses. The “Thinned” treatment and “Thinned and guyed” treatment showed no significant stem growth response in the first year after treatment, but very large increases in the second and subsequent years. There were much larger growth responses in the “Thinned” treatment than in the “Thinned and guyed” treatment, especially in the lower stem. Similar growth responses were observed in the structural roots, close to the stem base. These increases in stem and root growth in response to wind movement corresponded with a reduction of branch growth. Such changes in allocation have implications for the hydraulic and biomechanical requirements of trees, and should be incorporated into tree growth and stability models.

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