scholarly journals The sensitivity of white clover root hairs to aluminium

1996 ◽  
Vol 6 ◽  
pp. 137-140
Author(s):  
D.A. Care
Keyword(s):  
White Clover ◽  
Root Hair ◽  
Root Hairs ◽  
Aluminium Tolerance ◽  
Hair Length ◽  
Pastoral Systems ◽  
Root Hair Length ◽  
Clover Root ◽  
Low Ionic Strength ◽  
Two Populations

Two populations of white clover, selected for long (L) and short (S) root hairs from the cultivar Tamar, were used to determine the root hair response curve to a range of aluminium (Al) concentrations similar to those found under field conditions. Seeds from the L and S populations were germinated and grown in low ionic strength hydroponic culture. Al was added to give final concentrations of 0, 2.5, 5, 7.5 and 10 ìM Al in solution. After 4 weeks plants were harvested and subsampled for root hair analysis. Mean root hair length, root hair number and total root hair length were recorded. Mean root hair length decreased by about 30% at 2.5 ìM Al, and by 70% at 10 ìM Al, but the most Al sensitive parameter was root hair number. Root hair numbers decreased by 70% at only 2.5 ìM Al, and at 10 ìM Al, had decreased by 99%. This pruning effect on total root hair length and number has major implications for the root hair functions of nutrient acquisition, preserving the moisture film, anchorage and nodulation. These are discussed in relation to New Zealand pastoral systems. Keywords: aluminium tolerance, nodulation, root hairs, root pulling, Trifolium repens L., white clover

The utility of phenotypic plasticity of root hair length for phosphorus acquisition

2010 ◽  
Vol 37 (4) ◽  
pp. 313 ◽  
Author(s):  
Jinming Zhu ◽  
Chaochun Zhang ◽  
Jonathan P. Lynch
Keyword(s):  
Phenotypic Plasticity ◽  
Root Hair ◽  
Root Respiration ◽  
Root Hairs ◽  
Controlled Environment ◽  
P Availability ◽  
Hair Length ◽  
Phosphorus Acquisition ◽  
Root Hair Length ◽  
Low Phosphorus

Root hairs are subcellular protrusions from the root epidermis that are important for the acquisition of immobile nutrients such as phosphorus (P). Genetic variation exists for both root hair length and the plasticity of root hair length in response to P availability, where plasticity manifests as increased root hair length in response to low P availability. Although it is known that long root hairs assist P acquisition, the utility of phenotypic plasticity for this trait is not known. To assess the utility of root hair plasticity for adaptation to low phosphorus availability, we evaluated six recombinant inbred lines of maize (Zea mays L.) with varying root hair lengths and root hair plasticity in a controlled environment and in the field. Genotypes with long root hairs under low P availability had significantly greater plant growth, P uptake, specific P absorption rates and lower metabolic cost-benefit ratios than short-haired genotypes. Root hair length had no direct effect on root respiration. In the controlled environment, plastic genotypes had greater biomass allocation to roots, greater reduction in specific root respiration and greater final biomass accumulation at low phosphorus availability than constitutively long-haired genotypes. In the field study, the growth of plastic and long-haired genotypes were comparable under low P, but both were superior to short-haired genotypes. We propose that root hair plasticity is a component of a broader suite of traits, including plasticity in root respiration, that permit greater root growth and phosphorus acquisition in low P soils.

Spanish spelt is unique germplasm for improvement of root hair length in hexaploid wheat

2020 ◽  
Vol 452 (1-2) ◽  
pp. 171-184 ◽  
Author(s):  
Natsumi Okano ◽  
Ryo Goto ◽  
Taku Kato ◽  
Daisuke Saisho ◽  
Kenji Kato ◽  
...  
Keyword(s):  
Root Hair ◽  
Hexaploid Wheat ◽  
Hair Length ◽  
Root Hair Length

scholarly journals What are the implications of variation in root hair length on tolerance to phosphorus deficiency in combination with water stress in barley (Hordeum vulgare)?

2012 ◽  
Vol 110 (2) ◽  
pp. 319-328 ◽  
Author(s):  
L.K. Brown ◽  
T.S. George ◽  
J.A. Thompson ◽  
G. Wright ◽  
J. Lyon ◽  
...  
Keyword(s):  
Water Stress ◽  
Hordeum Vulgare ◽  
Root Hair ◽  
Phosphorus Deficiency ◽  
Hair Length ◽  
Root Hair Length

Interactions between root hair length and arbuscular mycorrhizal colonisation in phosphorus deficient barley (Hordeum vulgare)

2013 ◽  
Vol 372 (1-2) ◽  
pp. 195-205 ◽  
Author(s):  
Lawrie K. Brown ◽  
Timothy S. George ◽  
Gracie E. Barrett ◽  
Stephen F. Hubbard ◽  
Philip J. White
Keyword(s):  
Hordeum Vulgare ◽  
Root Hair ◽  
Arbuscular Mycorrhizal ◽  
Hair Length ◽  
Root Hair Length ◽  
Mycorrhizal Colonisation

scholarly journals Genome-wide linkage mapping of QTL for root hair length in a Chinese common wheat population

2020 ◽  
Vol 8 (6) ◽  
pp. 1049-1056
Author(s):  
Feng Huang ◽  
Zhaoyan Chen ◽  
Dejie Du ◽  
Panfeng Guan ◽  
Lingling Chai ◽  
...  
Keyword(s):  
Common Wheat ◽  
Root Hair ◽  
Linkage Mapping ◽  
Hair Length ◽  
Root Hair Length ◽  
Wheat Population ◽  
Genome Wide

Root hair length and rhizosheath mass depend on soil porosity, strength and water content in barley genotypes

Planta ◽  
2013 ◽  
Vol 239 (3) ◽  
pp. 643-651 ◽  
Author(s):  
Rebecca E. Haling ◽  
Lawrie K. Brown ◽  
A. Glyn Bengough ◽  
Tracy A. Valentine ◽  
Philip J. White ◽  
...  
Keyword(s):  
Water Content ◽  
Root Hair ◽  
Soil Porosity ◽  
Hair Length ◽  
Root Hair Length ◽  
Barley Genotypes
Sign in / Sign up

Export Citation Format

Share Document