scholarly journals The root response to gravity: from the macro to the nanoscale

2021 ◽  
Vol 343 (3) ◽  
pp. 257-265
Author(s):  
Matthieu Pierre Platre
Keyword(s):  
Root Response

Quantitative trait loci mapping of Meloidogyne incognita and M. hapla resistance in a recombinant inbred line population of soybean

Nematology ◽  
2018 ◽  
Vol 20 (6) ◽  
pp. 525-537
Author(s):  
Chunjie Li ◽  
Jialin Wang ◽  
Jia You ◽  
Xinpeng Wang ◽  
Baohui Liu ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Inbred Line ◽  
Recombinant Inbred Line ◽  
Meloidogyne Incognita ◽  
Qtl Analysis ◽  
Recombinant Inbred Line Population ◽  
Quantitative Trait ◽  
Recombinant Inbred ◽  
Nematode Reproduction ◽  
Root Response

Summary A recombinant inbred line population of soybean (Glycine max) was utilised to identify the quantitative trait loci (QTLs) determining the response to infection by two root-knot nematode species, Meloidogyne incognita and M. hapla, in glasshouse assays. QTL analysis detected seven major and four minor QTLs on seven soybean chromosomes ((Chrs) 1, 7, 8, 10, 14, 18, 20) explaining 6-41% phenotypic variance (PVE) for M. incognita root response and nematode reproduction. Three of the major QTLs, on Chrs 7, 10 and 18, were confirmed in previous reports and two major QTLs on Chrs 14 and 20 were detected for the first time. The QTL analysis with M. hapla provides the first report of a major QTL region mapped on Chr 7, explaining 70-82% PVE in M. hapla root response and nematode reproduction. These novel identified QTLs with flanking markers will be helpful in marker-assisted breeding for nematode resistance in soybean.

scholarly journals A Peroxidase Contributes to ROS Production during Arabidopsis Root Response to Potassium Deficiency

2010 ◽  
Vol 3 (2) ◽  
pp. 420-427 ◽  
Author(s):  
Min Jung Kim ◽  
Silvano Ciani ◽  
Daniel P. Schachtman
Keyword(s):  
Potassium Deficiency ◽  
Ros Production ◽  
Arabidopsis Root ◽  
Root Response

Salicylic acid but not jasmonic acid improved canola root response to salinity stress

Rhizosphere ◽  
2019 ◽  
Vol 9 ◽  
pp. 69-71 ◽  
Author(s):  
Salar Farhangi-Abriz ◽  
Tahereh Alaee ◽  
Alireza Tavasolee
Keyword(s):  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Salinity Stress ◽  
Root Response

scholarly journals Malate-dependent Fe accumulation is a critical checkpoint in the root developmental response to low phosphate

2017 ◽  
Vol 114 (17) ◽  
pp. E3563-E3572 ◽  
Author(s):  
Javier Mora-Macías ◽  
Jonathan Odilón Ojeda-Rivera ◽  
Dolores Gutiérrez-Alanís ◽  
Lenin Yong-Villalobos ◽  
Araceli Oropeza-Aburto ◽  
...  
Keyword(s):  
Primary Root ◽  
Root System Architecture ◽  
Root Apical Meristem ◽  
Root Tip ◽  
Al Tolerance ◽  
Short Root ◽  
Meristematic Cells ◽  
Isolation And Characterization ◽  
Root Response ◽  
Primary Root Growth

Low phosphate (Pi) availability constrains plant development and seed production in both natural and agricultural ecosystems. When Pi is scarce, modifications of root system architecture (RSA) enhance the soil exploration ability of the plant and lead to an increase in Pi uptake. In Arabidopsis, an iron-dependent mechanism reprograms primary root growth in response to low Pi availability. This program is activated upon contact of the root tip with low-Pi media and induces premature cell differentiation and the arrest of mitotic activity in the root apical meristem, resulting in a short-root phenotype. However, the mechanisms that regulate the primary root response to Pi-limiting conditions remain largely unknown. Here we report on the isolation and characterization of two low-Pi insensitive mutants (lpi5 and lpi6), which have a long-root phenotype when grown in low-Pi media. Cellular, genomic, and transcriptomic analysis of low-Pi insensitive mutants revealed that the genes previously shown to underlie Arabidopsis Al tolerance via root malate exudation, known as SENSITIVE TO PROTON RHIZOTOXICITY (STOP1) and ALUMINUM ACTIVATED MALATE TRANSPORTER 1 (ALMT1), represent a critical checkpoint in the root developmental response to Pi starvation in Arabidopsis thaliana. Our results also show that exogenous malate can rescue the long-root phenotype of lpi5 and lpi6. Malate exudation is required for the accumulation of Fe in the apoplast of meristematic cells, triggering the differentiation of meristematic cells in response to Pi deprivation.

Advances in understanding plant root response to nematode attack

2021 ◽  
pp. 267-300
Author(s):  
Shahid Siddique ◽  
◽  
John T. Jones ◽  
◽  
Keyword(s):  
Plant Root ◽  
Control Plant ◽  
Natural Resistance ◽  
Parasitic Nematodes ◽  
Host Gene Expression ◽  
Toxic Response ◽  
The World ◽  
Feeding Structure ◽  
Root Response ◽  
Plant Parasitic

Plant parasitic nematodes are damaging pests on all crops grown across the world. They exploit plants using a range of strategies, ranging from simple browsing ectoparasitism to highly complex biotrophic endoparasites. Some nematodes induce the formation of complex feeding structures in the roots of their hosts that require extensive reprogramming of host gene expression. These changes include changes in fundamentally important plant processes, including the cell cycle. Natural resistance can be used to control plant nematodes, and great progress has been made in mapping and identifying resistance genes against nematodes. Recent work has shown that the dependence of nematodes on a feeding structure has allowed plants to evolve new mechanisms of resistance that target this structure with a toxic response.

scholarly journals Genetic networks involved in poplar root response to low nitrogen

2013 ◽  
Vol 8 (11) ◽  
pp. e27211 ◽  
Author(s):  
Hairong Wei ◽  
Yordan Yordanov ◽  
Sapna Kumari ◽  
Tatyana Georgieva ◽  
Victor Busov
Keyword(s):  
Genetic Networks ◽  
Root Response ◽  
Poplar Root ◽  
Low Nitrogen

scholarly journals Peatland warming strongly increases fine-root growth

2020 ◽  
Vol 117 (30) ◽  
pp. 17627-17634
Author(s):  
Avni Malhotra ◽  
Deanne J. Brice ◽  
Joanne Childs ◽  
Jake D. Graham ◽  
Erik A. Hobbie ◽  
...  
Keyword(s):  
Climate Change ◽  
Root Growth ◽  
Fine Root ◽  
Growing Season ◽  
Ambient Conditions ◽  
Climate Change Responses ◽  
Fine Root Growth ◽  
Root Response ◽  
Root Responses ◽  
Northern Peatlands

Belowground climate change responses remain a key unknown in the Earth system. Plant fine-root response is especially important to understand because fine roots respond quickly to environmental change, are responsible for nutrient and water uptake, and influence carbon cycling. However, fine-root responses to climate change are poorly constrained, especially in northern peatlands, which contain up to two-thirds of the world’s soil carbon. We present fine-root responses to warming between +2 °C and 9 °C above ambient conditions in a whole-ecosystem peatland experiment. Warming strongly increased fine-root growth by over an order of magnitude in the warmest treatment, with stronger responses in shrubs than in trees or graminoids. In the first year of treatment, the control (+0 °C) shrub fine-root growth of 0.9 km m−2y−1increased linearly by 1.2 km m−2y−1(130%) for every degree increase in soil temperature. An extended belowground growing season accounted for 20% of this dramatic increase. In the second growing season of treatment, the shrub warming response rate increased to 2.54 km m−2°C−1. Soil moisture was negatively correlated with fine-root growth, highlighting that drying of these typically water-saturated ecosystems can fuel a surprising burst in shrub belowground productivity, one possible mechanism explaining the “shrubification” of northern peatlands in response to global change. This previously unrecognized mechanism sheds light on how peatland fine-root response to warming and drying could be strong and rapid, with consequences for the belowground growing season duration, microtopography, vegetation composition, and ultimately, carbon function of these globally relevant carbon sinks.

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