scholarly journals Role of Local Biofertilizer in Enhancing the Oxidative Stress Defence Systems of Date Palm Seedling (Phoenix dactylifera) against Abiotic Stress

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Oumaima Harkousse ◽  
Afafe Slimani ◽  
Issam Jadrane ◽  
Mohamed Aitboulahsen ◽  
Mouaad Amine Mazri ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Water Stress ◽  
Plant Growth ◽  
Date Palm ◽  
Water Status ◽  
Arbuscular Mycorrhizal ◽  
Stress Conditions ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis ◽  
Severe Water Stress

Among the abiotic stresses, drought is the first environmental stress responsible for a decrease in agricultural production worldwide; it affects plants in various ways, including slowing down plant growth and disrupting its general physiology. Arbuscular mycorrhizal symbiosis and plant growth-promoting rhizobacteria (PGPR) are considered to be the bioameliorators of the plant’s resistance to water stress. The present study investigated the effects of inoculation with arbuscular mycorrhizal fungi (AMF) and PGPR on the water status and antioxidant enzyme activities of date palm seedlings grown under water stress conditions. The parameters related to the plant’s water status were significantly ( p < 0.05 ) higher in the plants treated with mycorrhizae and mycorrhizae + bacteria compared with their respective controls, especially under water stress conditions. The maximum proline content was obtained in plants inoculated with the AMF species and PGPR (combined) under severe water stress conditions reaching a value of 2.588 ± 0.034 in 25% field capacity, compared with 0.978 ± 0.024 for the control. In addition, the inoculated seedlings showed notably lower activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), and glutathione S-transferase (GST) in response to severe water stress compared with nonmycorrhizal seedling. Overall, the arbuscular mycorrhizal symbiosis and PGPR bacteria inoculation could be promising methods to enhance date palm resistance against oxidative stress.

scholarly journals Categorization of the water status of rice inoculated with arbuscular mycorrhizae and with water deficit

2021 ◽  
pp. 339-355
Author(s):  
Michel Ruiz Sánchez ◽  
Juan Adriano Cabrera Rodríguez ◽  
José M. Del'Anico Rodríguez ◽  
Yaumara Muñoz Hernández ◽  
Ricardo Aroca Álvarez ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Deficit ◽  
Mycorrhizal Fungi ◽  
Water Status ◽  
Light Stress ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Control Treatment ◽  
Mycorrhizal Symbiosis ◽  
Rice Plants

Introduction. The water deficit negatively affects rice plants and limits their productivity. Arbuscular mycorrhizal symbiosis has been shown to improve rice productivity in drought conditions. Objective. To propose a new categorization for the state of water stress of rice plants inoculated (AM) or not with arbuscular mycorrhizal fungi (nonAM) and exposed to water deficit (D) during the vegetative phase. Materials and methods. The experiment was carried out under controlled greenhouse conditions during the years 2009 and 2010 at the Zaidín Experimental Station, Granada, Spain. The rice transplantation was carried out fourteen days after germination to pots with a 5 cm water sheet and at 30, 40, or 50 days after transplantation (DAT) they were subjected to water deficit during a period of 15 days, at which time the water sheet was restored. The control treatment was maintained throughout the cycle under flood conditions (ww). Evaluations were performed at 45, 55, 65 DAT and after recovery at 122 DAT. The harvest was carried out at 147 DAT. Results. The reduction in water supply demonstrated water stress in the plants, manifested by the decrease in the water potential of the leaves. Arbuscular mycorrhizal symbiosis always favored the water status of the plant. Four categories of water status of plants were proposed taking into account water potentials and agricultural yield: no stress (≥-0.67 MPa); light stress (<-0.67 to -1.20 MPa); moderate stress (<-1.20 to -1.60 MPa), and severe stress (<-1.60 MPa). Conclusion. The categorization of stress due to the water deficit is a tool of high scientific value for the specific case of rice, since this plant has the capacity to adapt to tolerate the presence of a sheet of water throughout its biological cycle and is highly susceptible to water deficit.

Responses of tomato plants associated with the arbuscular mycorrhizal fungus Glomus clarum during drought and recovery

2002 ◽  
Vol 138 (4) ◽  
pp. 387-393 ◽  
Author(s):  
J. DELL'AMICO ◽  
A. TORRECILLAS ◽  
P. RODRÍGUEZ ◽  
A. MORTE ◽  
M. J. SÁNCHEZ-BLANCO
Keyword(s):  
Water Stress ◽  
Plant Growth ◽  
Water Potential ◽  
Water Status ◽  
Soil Water Potential ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Symbiosis ◽  
Tomato Plants ◽  
Glomus Clarum

Mycorrhizal and non-mycorrhizal tomato plants (Lycopersicon esculentum Mill. cv ‘Amalia’) were subjected to water stress by withholding irrigation water for 72 hours and then reirrigated for 120 hours. Water stress reduced root mycorrhizal colonization, although the presence of the fungus Glomus clarum stimulated tomato plant growth. During the stress period the effect on the growth was more pronounced in aerial biomass than in the root biomass. The decrease in the soil water potential generated a decrease in leaf water potential (Ψl) and leaf turgor potential (Ψt), particularly in the non-mycorrhizal plants. Although the absence of osmotic adjustment provoked the loss of turgor in stressed plants, both Ψl and Ψt recovered after a short reirrigation period. Mycorrhizal infection improved photosynthetic activity (Pn) and stomatal conductance (gs) in non-stressed and stressed plants. These increases were accompanied by higher root hydraulic conductivity values, indicating enhanced water uptake in drought conditions. Neither Pn nor gs fully recovered after rewatering. The beneficial effect of the mycorrhizal symbiosis on the water status of tomato plants stimulated plant growth.

scholarly journals Arbuscular mycorrhizal symbiosis increases relative apoplastic water flow in roots of the host plant under both well-watered and drought stress conditions

2012 ◽  
Vol 109 (5) ◽  
pp. 1009-1017 ◽  
Author(s):  
Gloria Bárzana ◽  
Ricardo Aroca ◽  
José Antonio Paz ◽  
François Chaumont ◽  
Mari Carmen Martinez-Ballesta ◽  
...  
Keyword(s):  
Drought Stress ◽  
Host Plant ◽  
Water Flow ◽  
Arbuscular Mycorrhizal ◽  
Stress Conditions ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis

Arbuscular mycorrhizal symbiosis enhanced growth and antioxidant metabolism in date palm subjected to long-term drought

Trees ◽  
2015 ◽  
Vol 29 (6) ◽  
pp. 1725-1733 ◽  
Author(s):  
Laila Benhiba ◽  
Mohammad Oussouf Fouad ◽  
Abdellatif Essahibi ◽  
Cherki Ghoulam ◽  
Ahmed Qaddoury
Keyword(s):  
Date Palm ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis ◽  
Antioxidant Metabolism

scholarly journals Phosphate Import at the Arbuscule: Just a Nutrient?

2011 ◽  
Vol 24 (11) ◽  
pp. 1296-1299 ◽  
Author(s):  
Shu-Yi Yang ◽  
Uta Paszkowski
Keyword(s):  
Plant Growth ◽  
Phosphate Uptake ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis ◽  
Phosphate Ion ◽  
Cortex Cell

Central to the mutualistic arbuscular mycorrhizal symbiosis is the arbuscule, the site where symbiotic phosphate is delivered. Initial investigations in legumes have led to the exciting observation that symbiotic phosphate uptake not only enhances plant growth but also regulates arbuscule dynamics and is, furthermore, required for maintenance of the symbiosis. This review evaluates the possible role of the phosphate ion, not only as a nutrient but also as a signal that is necessary for reprogramming the host cortex cell for symbiosis.

scholarly journals The H+-ATPase HA1 of Medicago truncatula Is Essential for Phosphate Transport and Plant Growth during Arbuscular Mycorrhizal Symbiosis

2014 ◽  
Vol 26 (4) ◽  
pp. 1808-1817 ◽  
Author(s):  
Franziska Krajinski ◽  
Pierre-Emmanuel Courty ◽  
Daniela Sieh ◽  
Philipp Franken ◽  
Haoqiang Zhang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Medicago Truncatula ◽  
Arbuscular Mycorrhizal ◽  
Phosphate Transport ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis
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