Effects of phosphorus stress on the root morphology and root exudates in different sugar beet genotypes

2011 ◽  
Author(s):  
Jianchao Zhou ◽  
Xiaochun Wang ◽  
Yanhong Deng ◽  
Yan Wang
Keyword(s):  
Sugar Beet ◽  
Root Exudates ◽  
Root Morphology ◽  
Phosphorus Stress

scholarly journals Potassium Improves Drought Stress Tolerance in Plants by Affecting Root Morphology, Root Exudates and Microbial Diversity

Metabolites ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 131
Author(s):  
Qiwen Xu ◽  
Hao Fu ◽  
Bo Zhu ◽  
Hafiz Athar Hussain ◽  
Kangping Zhang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Drought Stress ◽  
Organic Acids ◽  
Microbial Diversity ◽  
Root Exudates ◽  
Root Morphology ◽  
Diversity Index ◽  
Equation Modeling ◽  
Available Phosphorus ◽  
Underground Part

Potassium (K) reduces the deleterious effects of drought stress on plants. However, this mitigation has been studied mainly in the aboveground plant pathways, while the effect of K on root-soil interactions in the underground part is still underexplored. Here, we conducted the experiments to investigate how K enhances plant resistance and tolerance to drought by controlling rhizosphere processes. Three culture methods (sand, water, and soil) evaluated two rapeseed cultivars’ root morphology, root exudates, soil nutrients, and microbial community structure under different K supply levels and water conditions to construct a defensive network of the underground part. We found that K supply increased the root length and density and the organic acids secretion. The organic acids were significantly associated with the available potassium decomposition, in order of formic acid > malonic acid > lactic acid > oxalic acid > citric acid. However, the mitigation had the hormesis effect, as the appropriate range of K facilitated the morphological characteristic and physiological function of the root system with increases of supply levels, while the excessive input of K could hinder the plant growth. The positive effect of K-fertilizer on soil pH, available phosphorus and available potassium content, and microbial diversity index was more significant under the water stress. The rhizosphere nutrients and pH further promoted the microbial community development by the structural equation modeling, while the non-rhizosphere nutrients had an indirect negative effect on microbes. In short, K application could alleviate drought stress on the growth and development of plants by regulating the morphology and secretion of roots and soil ecosystems.

scholarly journals Characteristics of Organic Acid Secretion Associated with the Interaction betweenBurkholderia multivoransWS-FJ9 and Poplar Root System

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Guan-Xi Li ◽  
Xiao-Qin Wu ◽  
Jian-Ren Ye ◽  
He-Chuan Yang
Keyword(s):  
Organic Acids ◽  
Root System ◽  
Root Exudates ◽  
High Performance ◽  
Interactive Effects ◽  
Available Phosphorus ◽  
Burkholderia Multivorans ◽  
Phosphorus Stress ◽  
Phosphate Solubilizing ◽  
Poplar Root

The objective of this study was to investigate whether plant-bacteria interaction affects the secretion of organic acids by both organisms and to assess whether the production of IAA by the bacterium increases the secretion of organic acids by root exudates, and if the stress produced by low available phosphorus (P) affects the production of organic acids by bacteria, by roots, or by root exudates in presence of bacterial cultures. With this purpose, we used as a biological model poplar plants and one strain ofBurkholderia multivoransable to solubilize P. High performance liquid chromatography was utilized to measure organic acids. The tests, the inductive effects of exogenous indole-3-acetic acid (IAA) on secretion of organic acids, the 2 × 4 × 2 factorial design experiment, and the ability of organic acids to solubilize tricalcium phosphate were performed to investigate the interactive effects. The results showed that, afterB. multivoransWS-FJ9 interacted with the poplar root system, the key phosphate-solubilizing driving force was gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced byB. multivoransWS-FJ9; (2) secreted byB. multivoransWS-FJ9; and (3) secreted by the poplar root system in the presence of phosphorus stress. When phosphorus stress was absent, the GA was produced as outlined in (1) and (2) above. These results demonstrated that inoculatingB. multivoransWS-FJ9 into the poplar root system could increase the amount of GA secretion and implied that the interaction betweenB. multivoransWS-FJ9 and the poplar root system could contribute to the increase of P available fraction for poplar plants.

scholarly journals Citramalic acid and salicylic acid in sugar beet root exudates solubilize soil phosphorus

2011 ◽  
Vol 11 (1) ◽  
pp. 121 ◽  
Author(s):  
Reza Khorassani ◽  
Ursula Hettwer ◽  
Astrid Ratzinger ◽  
Bernd Steingrobe ◽  
Petr Karlovsky ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Sugar Beet ◽  
Root Exudates ◽  
Soil Phosphorus ◽  
Beet Root ◽  
Sugar Beet Root

Critical phosphorus requirements of Trifolium species: the importance of root morphology and root acclimation in response to phosphorus stress

2021 ◽  
Author(s):  
Adeline Becquer ◽  
Rebecca E. Haling ◽  
Anne Warren ◽  
Rowan Alden Hull ◽  
Adam Stefanski ◽  
...  
Keyword(s):  
Root Morphology ◽  
Phosphorus Stress ◽  
Phosphorus Requirements

scholarly journals Root Morphology and Rhizosphere Characteristics Are Related to Salt Tolerance of Suaeda salsa and Beta vulgaris L.

2021 ◽  
Vol 12 ◽  
Author(s):  
Shoule Wang ◽  
Zhenyong Zhao ◽  
Shaoqing Ge ◽  
Bin Peng ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Sugar Beet ◽  
Surface Area ◽  
Root Morphology ◽  
High Salinity ◽  
Root Surface ◽  
Root Diameter ◽  
Suaeda Salsa ◽  
Root Surface Area ◽  
Salt Level

Halophytes are capable of resisting salinity, and their root system is the part in direct contact with the saline soil environment. The aim of this study was to compare the responses of root morphology and rhizosphere characteristics to salinity between a halophyte, Suaeda salsa (suaeda), and a glycophyte, Beta vulgaris L. (sugar beet). The soil salt content was set to four levels (0.7, 1.2, 1.7, and 2.7%) by NaCl-treated plants. We investigated the soil pH, EC, nutrients and soil, plant ion (Na+, Cl−, K+, and Mg2+) concentration to evaluate the rhizospheric processes, and salt tolerance of suaeda by the root mat method. The highest biomass was in the 1.2% salt level for suaeda and in the 0.7% salt level for sugar beet. The root length and root surface area of suaeda showed similar trends to biomass, but the root diameter decreased by 11.5–17.9% with higher salinity. The Na+, Cl−, and K+ accumulations in the shoot of suaeda displayed higher than that in sugar beet, while the Mg2+ accumulation was lower in suaeda than that in sugar beet. High salinity resulted in increased pH and EC values in the rhizosphere for suaeda, but lower values of these parameters for sugar beet. Under high salinity, the Olsen phosphorus content was 0.50 g·kg−1 and 0.99 g·kg−1 higher in the rhizosphere than in the non-rhizosphere for suaeda and sugar beet. We concluded that the two species [halophyte, Suaeda salsa (suaeda), and a glycophyte, B. vulgaris L. (sugar beet)] showed diverse approaches for nutrient absorption under salinity stress. Suaeda altered its root morphology (smaller root diameter and longer roots) under salt stress to increase the root surface area, while sugar beet activated rhizospheric processes to take up more nutrients.

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