Effect of potassium deficiency on growth, antioxidants, ionome and metabolism in rapeseed under drought stress

Zhu, Bo; Xu, Qiwen; Zou, Yanbiao; Ma, Shumin; Zhang, Xiaoduan; Xie, Xun; Wang, Longchang

doi:10.1007/s10725-019-00545-8

Cited by 35 publications

(27 citation statements)

References 43 publications

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“…In addition to the root system architecture, K also affect the quantity and composition of organic acids in order to tackle water scarcity. K, a primary cellular osmoticum, plays a vital role in neutralizing the negative charges [7]. On the one hand, K mediated the controlled release of organic acids thought anion channels in roots as factors affecting membrane integrity may affect organic acids exudation [17].…”

Section: Discussionmentioning

confidence: 99%

“…Fertilization strategies promote plant growth, anatomy, morphology, plant metabolism and improve nutrient reserves to cope with adverse environmental conditions [6]. Potassium (K) is an essential mineral nutrient for plants, which holds the key for many physiological processes in different crop species, like photosynthesis, protein synthesis, stomatal movement, and osmoregulation [7][8][9]. Promising evidence showed that the significant relationship between soil K and plant water.…”

Section: Introductionmentioning

confidence: 99%

“…Promising evidence showed that the significant relationship between soil K and plant water. Plants can absorb K from the soil to improve their water use efficiency [7], maintaining the tolerance and resistance at a high level to withstand drought stress. The positive effect of K is to alter the CO2 input process by regulating the stomatal function, which alleviates the photoassimilation limited by water deficit [8,10], and K also controls carbohydrate metabolizing enzymes to enhances the accumulation and translocation of sucrose [11], all of those processes are closely related to plant growth and productivity.…”

Section: Introductionmentioning

confidence: 99%

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

Zhu

et al. 2021

Metabolites

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zhu

et al. 2021

Metabolites

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“…In spite of this, it has been observed how salinity stress provokes an inhibition of seed germination and seedling establishment in rapeseed [39], as well as a reduction in biomass, size, and number of leaves, but not in photochemical activity [40]. Moreover, the way in which drought stress significantly inhibited germination and seedling growth led to oxidative stress from excessive H 2 O 2 generation and reduced the chlorophyll content [41], resulting in growth inhibition, oil content reduction, and yield loss during the reproductive stage [42].…”

Section: Discussionmentioning

confidence: 99%

Trichoderma parareesei Favors the Tolerance of Rapeseed (Brassica napus L.) to Salinity and Drought Due to a Chorismate Mutase

Poveda

2020

Agronomy

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Both drought and salinity represent the greatest plant abiotic stresses in crops. Increasing plant tolerance against these environmental conditions must be a key strategy in the development of future agriculture. The genus of Trichoderma filament fungi includes several species widely used as biocontrol agents for plant diseases but also some with the ability to increase plant tolerance against abiotic stresses. In this sense, using the species T. parareesei and T. harzianum, we have verified the differences between the two after their application in rapeseed (Brassica napus) root inoculation, with T. parareesei being a more efficient alternative to increase rapeseed productivity under drought or salinity conditions. In addition, we have determined the role that T. parareesei chorismate mutase plays in its ability to promote tolerance to salinity and drought in plants by increasing the expression of genes related to the hormonal pathways of abscisic acid (ABA) under drought stress, and ethylene (ET) under salt stress.

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“…The regulation of nutrient status in plants may contribute to ROS detoxification, the water status in plants, stability of cell membranes, and efficient photosynthesis (Garcia‐Marti et al, 2019). Zhu et al (2020), while conducting experiments on two cultivars of rape seed (YY57 and CY36) subjected to PEG 6000‐induced water stress at two potassium levels, noticed that the deficiency of potassium weakens the drought tolerance, causing reduction in the activity of antioxidant enzymes and biomass. Cultivar YY57 maintained higher potassium concentrations and antioxidant capacity in comparison to the cultivar CY36 under low potassium treatment, indicating association of potassium with drought tolerance.…”

Section: Discussionmentioning

confidence: 99%

Supplementation of potassium alleviates water stress‐induced changes in Sorghum bicolor L.

Tittal

Mir

Jatav

et al. 2020

Physiologia Plantarum

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This report discusses water stress-induced changes and their amelioration by added potassium in Sorghum bicolor L. Chlorophylls, carotenoids, and the activity of nitrogen metabolizing enzymes viz., nitrate reductase, alanine aminotransferase and aspartate aminotransferase were adversely affected under water stress and restricted irrigation. Osmotic as well as water stress trigger ROS production while potassium ameliorated these changes to some extent and increased the activity of SOD, CAT, APX, and GR and the contents of GSH and AsA. Water stress-induced changes ultimately reflecting on growth and yield parameters like plant height, biomass yield, grain yield, days to flowering, and days to maturity. Added potassium affected these parameters positively, both under normal and stress conditions, indicating the use of potassium as a tool for mitigating the water stress induced deleterious changes in sorghum to some extent by enhancing the nitrogen use efficiency and strengthening the enzymatic and non-enzymatic antioxidant components. The results obtained here exhibited similar trends in seedlings and plants raised in sand cultures and field conditions, making them more meaningful and comprehensible. | INTRODUCTIONInadequate water supply is one of the important factors that limit crop productivity and grain quality. The severity of water stress depends not only on the magnitude and duration of the stress, but also on the developmental stage of the plant at which the stress is imposed.Water stress not only modifies the morphology of a plant but also severely affects its metabolism (Khan et al., 1993;Ober et al., 1991;Saeed et al., 1997). Altered cellular metabolism in response to water stress results in reduced growth and crop yield because of excess production of ROS and damage to cell membranes, proteins, nucleic acids, and other components of the cell (Gill & Tuteja, 2010;Tambussi et al., 2000). Limited water supply affects physiological and biochemical processes in plants such as photosynthesis, enzyme activities, plant water relations, integrity of membranes, all in all resulting in metabolic dysfunctions (Abid et al., 2018;Gill & Tuteja, 2010). Water deficit induces the oxidative stress in plants by the excess production of reactive oxygen species (ROS), which have the potential to cause membrane dysfunction and the leakage of important cellular components like mineral ions, e.g. K + (Blokhina et al., 2003;Kapoor et al., 2020). Potassium (K) nutrition to plants stimulates root growth, which helps with the efficient absorption of soil water (Saxena, 1985). Potassium treatments improved dry matter and total nitrogen content in faba bean plants subjected to restricted water supply during the post flowering period, probably by promoting growth and not by enhancing the nitrogen fixation efficiency (Kurdali et al., 2002). K availability to plants was reported to be related to soil water content, which highly influenced the mass flow and diffusion rates of K in soils (Doussan et al., 2003).

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Effect of potassium deficiency on growth, antioxidants, ionome and metabolism in rapeseed under drought stress

Cited by 35 publications

References 43 publications

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

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

Trichoderma parareesei Favors the Tolerance of Rapeseed (Brassica napus L.) to Salinity and Drought Due to a Chorismate Mutase

Supplementation of potassium alleviates water stress‐induced changes in Sorghum bicolor L.

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