Root and root hair growth of oats: replaceability of calcium

1973 ◽  
Vol 51 (9) ◽  
pp. 1655-1659 ◽  
Author(s):  
Yasuomi Tanaka ◽  
F. W. Woods
Keyword(s):  
Root Growth ◽  
Root Hair ◽  
Hair Growth ◽  
Morphological Changes ◽  
Primary Root ◽  
Calcium Nitrate ◽  
Mineral Nutrient ◽  
Salt Solutions ◽  
Root Hair Growth ◽  
Nutrient Solutions

Oat (Avena sativa L.) seedlings were grown in nutrient solutions deficient in either calcium, magnesium, or potassium as well as in single-salt solutions containing each of these elements. Strontium was studied using a nutrient solution in which calcium was replaced by strontium.The absence of magnesium or potassium did not affect root elongation in media containing calcium. Solutions containing only calcium nitrate supported some root growth but growth was negligible in all other single-salt solutions. When calcium was replaced by strontium, primary root growth and cell elongation were significantly reduced. However, there were no other readily detectable morphological changes resembling symptoms of calcium deficiency.Root hair elongation was not affected by the exclusion of either magnesium or potassium from nutrient solutions, but calcium deficiency (sodium substitution) resulted in less elongation and in deformation. Of all the single-salt solutions, only calcium nitrate supported normal root hair growth. Although root hairs were not deformed, formation and elongation were considerably reduced in strontium-substituted solutions. Strontium, in mineral nutrient media, may prevent toxic effects of other ions but does not completely replace calcium for root and root hair growth of oats.

scholarly journals Impacts of iron on phosphate starvation-induced root hair growth in Arabidopsis

2021 ◽  
Author(s):  
Caiwen Xue ◽  
Wenfeng Li ◽  
Ren Fang Shen ◽  
Ping Lan
Keyword(s):  
Root Hair ◽  
Hair Growth ◽  
Vesicle Trafficking ◽  
Primary Root ◽  
Root Hairs ◽  
Brefeldin A ◽  
Phosphate Starvation ◽  
Auxin Distribution ◽  
Root Hair Growth ◽  
Underlying Mechanisms

Phosphate is essential for plant growth and development. Root architecture alternations induced by phosphate starvation (-Pi), including primary root and lateral root growth, are mediated by iron (Fe). However, whether and how Fe participates in the -Pi-induced root hair growth (RHG) remains unclear. Here, with morphological, proteomic, and pharmacological analysis, we investigate the impacts of Fe on RHG under -Pi and the underlying mechanisms. We found that -Pi-induced RHG was affected by the local Fe availability. Reduced sensitivity to Fe was found in aux1-7, arf10arf16, and phr1 under -Pi, indicating auxin and phosphate starvation-induced responses were required for the Fe-triggered RHG under -Pi. Fe availability was then found to affect the auxin distribution and expression of phosphate starvation-responsive (PSR) genes. Proteomic analysis indicated vesicle trafficking was affected by Fe under -Pi. With the application of brefeldin A, we found the vesicle trafficking was affected by Fe, and root hairs displayed reduced sensitivity to Fe, indicating the vesicle trafficking is critical for Fe-triggered RHG under -Pi. Our data suggested that Fe is involved in RHG under -Pi by integrating the vesicle trafficking, auxin distribution, and PSR. It further enriches the understanding of the interplay between phosphate and iron on RHG.

scholarly journals The TOR–Auxin Connection Upstream of Root Hair Growth

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 150 ◽  
Author(s):  
Katarzyna Retzer ◽  
Wolfram Weckwerth
Keyword(s):  
Cell Fate ◽  
Root Hair ◽  
Hair Growth ◽  
Environmental Changes ◽  
Growth Control ◽  
Root Hairs ◽  
Signaling Cascades ◽  
Continuous Growth ◽  
Root Hair Cell ◽  
Root Hair Growth

Plant growth and productivity are orchestrated by a network of signaling cascades involved in balancing responses to perceived environmental changes with resource availability. Vascular plants are divided into the shoot, an aboveground organ where sugar is synthesized, and the underground located root. Continuous growth requires the generation of energy in the form of carbohydrates in the leaves upon photosynthesis and uptake of nutrients and water through root hairs. Root hair outgrowth depends on the overall condition of the plant and its energy level must be high enough to maintain root growth. TARGET OF RAPAMYCIN (TOR)-mediated signaling cascades serve as a hub to evaluate which resources are needed to respond to external stimuli and which are available to maintain proper plant adaptation. Root hair growth further requires appropriate distribution of the phytohormone auxin, which primes root hair cell fate and triggers root hair elongation. Auxin is transported in an active, directed manner by a plasma membrane located carrier. The auxin efflux carrier PIN-FORMED 2 is necessary to transport auxin to root hair cells, followed by subcellular rearrangements involved in root hair outgrowth. This review presents an overview of events upstream and downstream of PIN2 action, which are involved in root hair growth control.

scholarly journals Arabidopsis VILLIN4 is involved in root hair growth through regulating actin organization in a Ca2+-dependent manner

2011 ◽  
Vol 190 (3) ◽  
pp. 667-682 ◽  
Author(s):  
Yi Zhang ◽  
Yingyu Xiao ◽  
Fei Du ◽  
Lijuan Cao ◽  
Huaijian Dong ◽  
...  
Keyword(s):  
Root Hair ◽  
Hair Growth ◽  
Dependent Manner ◽  
Actin Organization ◽  
Root Hair Growth

ROP-GEF signal transduction is involved in AtCAP1-regulated root hair growth

2018 ◽  
Vol 87 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Chongzheng Huang ◽  
Xuemiao jiao ◽  
Ling Yang ◽  
Mimi Zhang ◽  
Mengmemg Dai ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Root Hair ◽  
Hair Growth ◽  
Root Hair Growth

scholarly journals A Class I ADP-Ribosylation Factor GTPase-Activating Protein Is Critical for Maintaining Directional Root Hair Growth in Arabidopsis

2008 ◽  
Vol 147 (4) ◽  
pp. 1659-1674 ◽  
Author(s):  
Cheol-Min Yoo ◽  
Jiangqi Wen ◽  
Christy M. Motes ◽  
J. Alan Sparks ◽  
Elison B. Blancaflor
Keyword(s):  
Root Hair ◽  
Hair Growth ◽  
Class I ◽  
Gtpase Activating Protein ◽  
Adp Ribosylation ◽  
Root Hair Growth ◽  
Adp Ribosylation Factor

scholarly journals Temperature and pH of the nutrient solution on wheat primary root growth

2004 ◽  
Vol 61 (3) ◽  
pp. 313-318 ◽  
Author(s):  
Carlos Eduardo de Oliveira Camargo ◽  
Antonio Wilson Penteado Ferreira Filho ◽  
Marcus Vinicius Salomon
Keyword(s):  
Root Growth ◽  
Nutrient Solution ◽  
Primary Root ◽  
Growth Period ◽  
Triticum Aestivum L ◽  
Solution Temperature ◽  
Stages Of Development ◽  
Primary Root Growth ◽  
Temperature And Growth ◽  
Nutrient Solutions

Primary root growth is very important for wheat (Triticum aestivum L.) crop in upland conditions in the State of São Paulo. Fourteen wheat genotypes (mutant lines and cultivars) were evaluated for primary root growth during 7 and 15 days of development in complete and aerated nutrient solutions, in the laboratory. In the first experiment, solutions with three pH values (4.0, 5.0 and 6.0) at constant temperature (24 ± 1°C), and in the second experiment, solutions with the same pH (4.0) but with three temperatures (18°C ± 1°C, 24°C ± 1°C and 30°C ± 1°C) were used. High genetic variability was observed among the evaluated genotypes in relation to primary root growth in the first stages of development in nutrient solutions independent of pH, temperature and growth period. Genotypes 6 (BH-1146) and 13 (IAC-17), tolerant to Al3+ showed genetic potential for root growth in the first stages of development (7 and 15 days), regardless of nutrient solution temperature and pH. Genotypes 14 (IAC-24 M), 15 (IAC-24), 17 (MON"S" / ALD "S") ´ IAC-24 M2, 18 (MON"S" / ALD "S") ´ IAC-24 M3 and 24 (KAUZ"S" / IAC-24 M3), tolerant to Al3+, showed reduced root growth under the same conditions.

Sign in / Sign up

Export Citation Format

Share Document