Assessment of Arbuscular Mycorrhizal Fungi Status and Rhizobium on Date Palm (Phoenix dactylifera L.) Cultivated in a Pb Contaminated Soil

Ghadbane, Mouloud; Medjekal, Samir; Benderradji, Laid; Belhadj, Hani; Harzallah, Daoud

doi:10.1007/978-3-030-51210-1_111

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…Rhizobiales was represented by Rhizobium in roots under non-saline freshwater irrigation, a fast growing rhizobacteria 47 observed generally in the nodules of leguminous plants 48 . Previous studies show that non-leguminous date palms also contain Rhizobium in the rhizosphere 15 , 19 , which is possibly involved in the promotion of plant growth 49 . The reason for the higher abundance of Rhizobium in roots of non-saline freshwater irrigation may be due to lack of salinity stress and higher soil OM, which possibly enabled Rhizobium to multiply faster in roots.…”

Section: Discussionmentioning

confidence: 99%

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

Shamim

Loganathachetti

Chandran

et al. 2022

Sci Rep

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Saline water irrigation has been used in date palm (Phoenix dactylifera L.) agriculture as an alternative to non-saline water due to water scarcity in hyper-arid environments. However, the knowledge pertaining to saline water irrigation impact on the root-associated bacterial communities of arid agroecosystems is scarce. In this study, we investigated the effect of irrigation sources (non-saline freshwater vs saline groundwater) on date palm root-associated bacterial communities using 16S rDNA metabarcoding. The bacterial richness, Shannon diversity and evenness didn’t differ significantly between the irrigation sources. Soil electrical conductivity (EC) and irrigation water pH were negatively related to Shannon diversity and evenness respectively, while soil organic matter displayed a positive correlation with Shannon diversity. 40.5% of total Operational Taxonomic Units were unique to non-saline freshwater irrigation, while 26% were unique to saline groundwater irrigation. The multivariate analyses displayed strong structuring of bacterial communities according to irrigation sources, and both soil EC and irrigation water pH were the major factors affecting bacterial communities. The genera Bacillus, Micromonospora and Mycobacterium were dominated while saline water irrigation whereas contrasting pattern was observed for Rhizobium, Streptomyces and Acidibacter. Taken together, we suggest that date-palm roots select specific bacterial taxa under saline groundwater irrigation, which possibly help in alleviating salinity stress and promote growth of the host plant.

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Section: Discussionmentioning

confidence: 99%

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

Shamim

Loganathachetti

Chandran

et al. 2022

Sci Rep

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“…Glomus spp. increased root fresh weigh, root length, shoot height, shoot fresh weight, and germination index and improved the root basal diameter, dry biomass, and seedling length of date palm under heavy metal stress conditions [445]. AMF also can interact with PGPR [446,447]; for example, a positive and significant synergistic interaction has been reported between Bacillus subtilis and AMF regarding nitrate, nitrate reductase, and nitrogenase properties and the components of phenols, lipids, fiber, and osmoprotectants such as proline, betaine, and glycine [448].…”

Section: Practical Application Of Microbial Biostimulants On Cropsmentioning

confidence: 94%

The Application of Arbuscular Mycorrhizal Fungi as Microbial Biostimulant, Sustainable Approaches in Modern Agriculture

Sun,

Shahrajabian

2023

Plants

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Biostimulant application can be considered an effective, practical, and sustainable nutritional crop supplementation and may lessen the environmental problems related to excessive fertilization. Biostimulants provide beneficial properties to plants by increasing plant metabolism, which promotes crop yield and improves the quality of crops; protecting plants against environmental stresses such as water shortage, soil salinization, and exposure to sub-optimal growth temperatures; and promoting plant growth via higher nutrient uptake. Other important benefits include promoting soil enzymatic and microbial activities, changing the architecture of roots, increasing the solubility and mobility of micronutrients, and enhancing the fertility of the soil, predominantly by nurturing the development of complementary soil microbes. Biostimulants are classified as microbial, such as arbuscular mycorrhizae fungi (AMF), plant-growth-promoting rhizobacteria (PGPR), non-pathogenic fungi, protozoa, and nematodes, or non-microbial, such as seaweed extract, phosphite, humic acid, other inorganic salts, chitin and chitosan derivatives, protein hydrolysates and free amino acids, and complex organic materials. Arbuscular mycorrhizal fungi are among the most prominent microbial biostimulants and have an important role in cultivating better, healthier, and more functional foods in sustainable agriculture. AMF assist plant nutrient and water acquisition; enhance plant stress tolerance against salinity, drought, and heavy metals; and reduce soil erosion. AMF are proven to be a sustainable and environmentally friendly source of crop supplements. The current manuscript gives many examples of the potential of biostimulants for the production of different crops. However, further studies are needed to better understand the effectiveness of different biostimulants in sustainable agriculture. The review focuses on how AMF application can overcome nutrient limitations typical of organic systems by improving nutrient availability, uptake, and assimilation, consequently reducing the gap between organic and conventional yields. The aim of this literature review is to survey the impacts of AMF by presenting case studies and successful paradigms in different crops as well as introducing the main mechanisms of action of the different biostimulant products.

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“…Yet, AMF effects highly depend on factors such as mycorrhizal isolates, plant species, and implicated heavy metal(oid)s [108]. The authors of [95] investigated the capacity of isolates from AMF, Glomus spp. (A01), and PGPR, Rhizobium leguminosarum (GM01), for phytoremediation and dealing with Pb uptake by date palm.…”

Section: Heavy Metal(oid)smentioning

confidence: 99%

“…PGPR can effectively mitigate date palm plants' contamination with heavy metal(oid)s. The authors of [95] noted that the inoculation with Rhizobium leguminosarum proved to positively influence date palm's growth traits, notably the root length, root fresh weight, shoot height, as well as shoot fresh weight, in addition to an improved germination index. The authors suggested that PGPR help with nutrient availability, pathogen suppression, and root branching enhancement in date palm.…”

Section: Heavy Metal(oid)smentioning

confidence: 99%

Biostimulants as Innovative Tools to Boost Date Palm (Phoenix dactylifera L.) Performance under Drought, Salinity, and Heavy Metal(Oid)s’ Stresses: A Concise Review

2022

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Date palm (Phoenix dactylifera L.) is constantly subjected to abiotic stresses. Hence, the application of biostimulants, such as the arbuscular mycorrhizal fungi (AMF) and plant growth-promoting rhizobacteria (PGPR), and organic amendments hold tremendous potential to significantly improve the growth and yield of date palm. The strengthening of biostimulants’ main common modes of action is exerted through five main functions: biostimulation (essentially), biofertilization, bioprotection, biological control, and the role of bio-effector. Moreover, synergistic and complementary effects manifest through biochemical and nutritional benefits, in addition to molecular modulation. In this regard, the present concise review focuses on highlighting the beneficial impact of AMF and PGPR, as well as the organic amendments, in boosting the health status and productivity of date palm plants subjected to abiotic stresses. Furthermore, mechanisms reinforcing date palm plants’ resilience to abiotic stresses, powered by biostimulants, are particularly emphasized. Based on this review, we could conclude that the overall findings corroborate the beneficial effects of AMF–PGPR and/or compost and manure application in terms of boosting date palm’s growth traits, development, yielding, as well as soil properties under extreme environmental factors, such as those of drought, salinity, and excessive heavy metal(oid)s. Thus, biostimulants can confer resilience to date palm plants against abiotic stresses.

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Assessment of Arbuscular Mycorrhizal Fungi Status and Rhizobium on Date Palm (Phoenix dactylifera L.) Cultivated in a Pb Contaminated Soil

Cited by 6 publications

References 6 publications

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

Salinity of irrigation water selects distinct bacterial communities associated with date palm (Phoenix dactylifera L.) root

The Application of Arbuscular Mycorrhizal Fungi as Microbial Biostimulant, Sustainable Approaches in Modern Agriculture

Biostimulants as Innovative Tools to Boost Date Palm (Phoenix dactylifera L.) Performance under Drought, Salinity, and Heavy Metal(Oid)s’ Stresses: A Concise Review

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