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Authors Ait-El-Mokhtar, M; Baslam, M; Ben-Laouane, R; Anli, M; Boutasknit, A; Mitsui, T; Wahbi, S; Meddich, A
Author Full Name Ait-El-Mokhtar, Mohamed; Baslam, Marouane; Ben-Laouane, Raja; Anli, Mohamed; Boutasknit, Abderrahim; Mitsui, Toshiaki; Wahbi, Said; Meddich, Abdelilah
Title Alleviation of Detrimental Effects of Salt Stress on Date Palm (Phoenix dactylifera L.) by the Application of Arbuscular Mycorrhizal Fungi and/or Compost
Source FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
Language English
Document Type Article
Author Keywords biofertilizers; mycorrhiza; nutrient uptake; oxidative stress; salinity; sustainable agriculture
Keywords Plus NUTRITIONAL QUALITY; MICROBIAL INOCULATION; SUPEROXIDE-DISMUTASE; ANTIOXIDANT SYSTEMS; ORGANIC AMENDMENTS; OXIDATIVE STRESS; NUTRIENT-UPTAKE; ABIOTIC STRESS; SALINE WATER; SOIL QUALITY
Abstract The date palm is a commercially important woody crop and is a good target plant for improving agricultural yields in extreme environments. However, salinity has been the primary abiotic stress complicating its cultivation and damaging its production worldwide. This study investigated the effect of alleviating salt stress on date palm growth and development by using arbuscular mycorrhizal fungi (AMF) and/or compost. The experiment was arranged in a completely randomized design with eight treatments. The treatments comprised control without inoculation or amendment and application of compost (made from green waste) and AMF (an autochthonous consortium) individually or in combination under non-saline (0 mM NaCl) or saline (240 mM NaCl) conditions. Growth, physiological characteristics, nutrient uptake, chlorophyll content, oxidative stress markers, and antioxidant enzyme activities were assessed. Salt stress increased sodium (Na+) and chlorine (Cl-) content, lipid peroxidation and proline, soluble sugar, and H2O2 content. However, it reduced growth parameters, AMF colonization, leaf water potential, nitrogen (N), phosphorus (P), potassium (K+), calcium (Ca2+), and chlorophyll content. The application of AMF and compost separately or in combination mitigated the deleterious effects induced by salinity. AMF inoculation contributed to plant salt tolerance through strategies such as increased nutrient uptake (particularly P and Ca2+), chlorophyll content, relative water content, stomatal conductance, antioxidant enzymatic activities (superoxide dismutase, ascorbate peroxidase, catalase) and by decreasing lipid peroxidation and H2O2 content. Plants grown in soil amended with compost under salt stress showed an improvement particularly in K+ and proline content and a decrease in H2O2 concentration compared to controls under the saline condition. In the presence of NaCl stress, the dual application of the compost and AMF consortium maximized plant growth, stomatal conductance, leaf water potential, all antioxidant enzyme activities and P, K+, N, and Ca2+ uptake as well as proline and soluble sugar content. However, it reduced Na(+)and Cl(-)uptake and oxidative stress marker content. In conclusion, our study suggests that the application of AMF with compost has the potential to improve the tolerance of date palm seedlings to salt stress more than AMF or compost applied separately.
Author Address [Ait-El-Mokhtar, Mohamed; Ben-Laouane, Raja; Anli, Mohamed; Boutasknit, Abderrahim; Wahbi, Said; Meddich, Abdelilah] Cadi Ayyad Univ, Fac Sci Semlalia, Dept Biol, Lab Agrofood Biotechnol & Valorizat Plant Bioreso, Marrakech, Morocco; [Baslam, Marouane; Mitsui, Toshiaki] Niigata Univ, Fac Agr, Lab Biochem, Niigata, Japan; [Mitsui, Toshiaki] Niigata Univ, Grad Sch Sci & Technol, Dept Life & Food Sci, Niigata, Japan
Reprint Address Meddich, A (corresponding author), Cadi Ayyad Univ, Fac Sci Semlalia, Dept Biol, Lab Agrofood Biotechnol & Valorizat Plant Bioreso, Marrakech, Morocco.; Baslam, M (corresponding author), Niigata Univ, Fac Agr, Lab Biochem, Niigata, Japan.
E-mail Address mbaslam@gs.niigata-u.ac.jp; a.meddich@uca.ma
Funding Agency and Grant Number EIG CONCERT-Japan 3rd Joint Call on Food Crops and Biomass Production Technologies under the Strategic International Research Cooperative Program of the Japan Science and Technology Agency (JST); Grant for Promotion of KAAB Projects (Niigata University) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan
Funding Text This research was partially supported by EIG CONCERT-Japan 3rd Joint Call on Food Crops and Biomass Production Technologies under the Strategic International Research Cooperative Program of the Japan Science and Technology Agency (JST), and by a Grant for Promotion of KAAB Projects (Niigata University) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. The funders had no role in the data collection, decision to publish, or preparation of the manuscript.
Publisher FRONTIERS MEDIA SA
Publisher City LAUSANNE
Publisher Address AVENUE DU TRIBUNAL FEDERAL 34, LAUSANNE, CH-1015, SWITZERLAND
29-Character Source Abbreviation FRONT SUSTAIN FOOD S
ISO Source Abbreviation Front. Sustain. Food Syst.
Publication Date SEP 4
Year Published 2020
Volume 4
Article Number 131
Digital Object Identifier (DOI) 10.3389/fsufs.2020.00131
Page Count 19
Web of Science Category Food Science & Technology
Subject Category Food Science & Technology
Document Delivery Number NU7MO
Unique Article Identifier WOS:000573824400001
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