Increased Tolerance of Citrus (&lt;i&gt;Citrus tangerina&lt;/i&gt;) Seedlings to Soil Water Deficit after Mycorrhizal Inoculation: Changes in Antioxidant Enzyme Defense System

Ni, Qiu-Dan; Zou, Ying-Ning; Wu, Qiang-Sheng; Huang, Yong-Ming

doi:10.15835/nbha4129218

Cited by 10 publications

(9 citation statements)

References 27 publications

(30 reference statements)

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“…According to the results of Tian et al (2013) , inoculation with AMF increased CAT activity of Plukenetia volubilis plants under DS, thus reducing both accumulation of H 2 O 2 and oxidative damage to lipids. Another study by Ni et al (2013) showed significantly higher leaf SOD and root CAT activity in mycorrhizal citrus tangerine seedlings as compared with non-mycorrhizal seedlings under DS conditions. Our study further showed that amongst SODs, leaf Cu/Zn-SOD, and Mn-SOD activities under mycorrhization remained unchanged under WW conditions, but significantly increased by 35 and 174% under DS conditions, respectively, as compared with non-mycorrhization ( Table 3 ).…”

Section: Resultsmentioning

confidence: 93%

“…Mycorrhization associated changes in antioxidant enzymes are widely reported ( Hu et al, 2007 ; Ni et al, 2013 ). Earlier studies ( Ni et al, 2013 ; Wu et al, 2013 ) using different citrus species demonstrated that the AMs conferred greater tolerance to plants against soil water deficit through an enhancement in their antioxidant enzyme defense system consequent upon a decrease in level of H 2 O 2 and

. In our studies, the DS induced accumulation of leaf

and H 2 O 2 concentration, regardless of AMF- or non-AMF-seedlings ( Table 3 ).…”

Section: Resultsmentioning

confidence: 99%

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Mycorrhizal-induced calmodulin mediated changes in antioxidant enzymes and growth response of drought-stressed trifoliate orange

et al. 2014

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Trifoliate orange [Poncirus trifoliata (L) Raf.] is considered highly arbuscular mycorrhizal (AM) dependent for growth responses through a series of signal transductions in form of various physiological responses. The proposed study was carried out to evaluate the effect of an AM fungus (Funneliformis mosseae) on growth, antioxidant enzyme (catalase, CAT; superoxide dismutase, SOD) activities, leaf relative water content (RWC), calmodulin (CaM), superoxide anion (O2•−), and hydrogen peroxide (H2O2) concentrations in leaves of the plants exposed to both well-watered (WW) and drought stress (DS) conditions. A 58-day of DS significantly decreased mycorrhizal colonization by 60% than WW. Compared to non-AM seedlings, AM seedlings displayed significantly higher shoot morphological properties (plant height, stem diameter, and leaf number), biomass production (shoot and root fresh weight) and leaf RWC, regardless of soil water status. AM inoculation significantly increased CaM and soluble protein concentrations and CAT activity, whereas significantly decreased O2•− and H2O2 concentration under both WW and DS conditions. The AM seedlings also exhibited significantly higher Cu/Zn-SOD and Mn-SOD activities than the non-AM seedlings under DS but not under WW, which are triggered by higher CaM levels in AM plants on the basis of correlation studies. Further, the negative correlation of Cu/Zn-SOD and Mn-SOD activities with O2•− and H2O2 concentration showed the DS-induced ROS scavenging ability of CaM mediated SODs under mycorrhization. Our results demonstrated that AM-inoculation elevated the synthesis of CaM in leaves and up-regulated activities of the antioxidant enzymes, thereby, repairing the possible oxidative damage to plants by lowering the ROS accumulation under DS condition.

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Section: Resultsmentioning

confidence: 93%

. In our studies, the DS induced accumulation of leaf

and H 2 O 2 concentration, regardless of AMF- or non-AMF-seedlings ( Table 3 ).…”

Section: Resultsmentioning

confidence: 99%

Mycorrhizal-induced calmodulin mediated changes in antioxidant enzymes and growth response of drought-stressed trifoliate orange

et al. 2014

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“…Several studies indicated that the low H 2 O 2 and MDA accumulation observed in AM plants was correlated with water stress tolerance [39,81,83]. Reduced H 2 O 2 and MDA content in AM plants might be due to better water availability and osmoregulation and higher antioxidative defense systems [43,84,85]. In the present study, higher leaf water, ion homeostasis, and osmotic organic content in AM plants were associated with lower accumulation of H 2 O 2 and MDA, indicating lower oxidative damage in the colonized plants.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Mediate Drought Tolerance and Recovery in Two Contrasting Carob (Ceratonia siliqua L.) Ecotypes by Regulating Stomatal, Water Relations, and (In)Organic Adjustments

Boutasknit

Baslam

Ait-El-Mokhtar

et al. 2020

Plants

101

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Irregular precipitation and drought caused an increase in tree mortality rates in multiple forest biomes with alterations in both ecosystem services and carbon balance. Carob (Ceratonia siliqua) growth and production in arid and semi-arid ecosystems are likely affected by climate change-induced droughts. Understanding the physiological responses of drought-induced early-stage tree death and strategies to enhance drought tolerance and optimize growth will help tree improvement programs. Mycorrhizal inoculation has a pronounced impact on plant growth, water absorption, mineral nutrition, and protection from abiotic stresses. However, a better understanding of these complex interconnected cellular processes and arbuscular mycorrhizal fungi (AMF)-mediated mechanisms regulating drought tolerance in plants will enhance its potential application as an efficient approach for bio-amelioration of stresses. The objectives of this work were to elucidate the different effects of autochthone AMF on inorganic solute and water content uptakes, organic adjustments (sugar and proteins content), leaf gas exchange (stomatal conductance and efficiency of photosystems I and II), and oxidative damage of two contrasting ecotypes of carob seedlings: coastal (southern ecotype (SE)) and in-land (northern ecotype (NE)) under control (C), drought (by cessation of irrigation for 15 days (15D)), and recovery (R) conditions. Our findings showed that AMF promoted growth, nutrient content, and physiological and biochemical parameters in plants of both ecotypes during C, 15D, and R conditions. After four days of recovery, stomatal conductance (gs), the maximum photochemical efficiency of PSII (Fv/Fm), water content, and plant uptake of mineral nutrients (P, K, Na, and Ca) were significantly higher in shoots of mycorrhizal (AM) than non-mycorrhizal (NM) control plants. Consequently, AMF reduced to a greater degree the accumulation of hydrogen peroxide (H2O2) and oxidative damage to lipid (malondialdehyde (MDA)) content in AM than NM plants in NE and SE, after recovery. Altogether, our findings suggest that AMF can play a role in drought resistance of carob trees at an early stage by increasing the inorganic solutes (P, K, Na, and Ca), water content uptake, organic solutes (soluble sugars and protein content), stomatal conductance, and defense response against oxidative damage during re-watering after drought stress.

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“…Mycorrhization associated changes in antioxidant enzymes are widely reported. Earlier studies (Ni et al 2013 andHuang et al 2014) The less oxidative damage in AMF inoculated plants might be due to better water avail ability and osmoregulation and high er antioxidative defense systems (Ni et al 2013.…”

Section: Effect Of Drought Stress and Amf On Oxidative Stressmentioning

confidence: 99%

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

et al. 2018

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The effect of arbuscular mycorrhizal fungi (AMF) on antioxidative system in drought tolerant (WH 1025) and drought susceptible (WH 1105) wheat varieties was investigated in screen house under control and stress conditions. Mycorrhizal and non-mycorrhizal wheat (Triticum aestivum L.) plants were subjected to water stress by withholding irrigation at different stages of plant growth (i.e. jointing and heading stages). The antioxidant and antioxidative enzymes were estimated in leaves of water stressed and control plants. It was found that drought tolerant and drought susceptible varieties showed different response under drought conditions. Variety WH 1105 suffered greater damage to cellular membrane due to high level of reactive oxygen species (ROS) as indicated by superoxide radical (O.-), hydrogen peroxide (H2O2) and malondialdehyde (MDA) content under stress conditions. Antioxidative enzymes viz. superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT) and peroxidase (POX) were higher in drought tolerant variety. Antioxidative metabolites viz. ascorbic acid and glutathione content was increased in both tolerant and susceptible variety under water stress but with higher magnitude in WH 1025 than WH 1105. Results showed that under water stress conditions, mycorrhizal inoculation significantly decreased the O2 .-, H2O2, and MDA content and enhance the activities of antioxidative enzymes in both the varieties. But it was found that the activity was higher in tolerant variety than susceptible variety under water stress conditions. Hence, overall results suggest that mycorrhizal symbiosis play a vital role in enhancing the activities of antioxidative enzymes and decreasing the ROS content that enables the host plant to sustain the drought conditions.

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Increased Tolerance of Citrus (<i>Citrus tangerina</i>) Seedlings to Soil Water Deficit after Mycorrhizal Inoculation: Changes in Antioxidant Enzyme Defense System

Cited by 10 publications

References 27 publications

Mycorrhizal-induced calmodulin mediated changes in antioxidant enzymes and growth response of drought-stressed trifoliate orange

Mycorrhizal-induced calmodulin mediated changes in antioxidant enzymes and growth response of drought-stressed trifoliate orange

Arbuscular Mycorrhizal Fungi Mediate Drought Tolerance and Recovery in Two Contrasting Carob (Ceratonia siliqua L.) Ecotypes by Regulating Stomatal, Water Relations, and (In)Organic Adjustments

Influence of arbuscular mycorrhiza on antioxidative system of wheat (Triticum aestivum) under drought stress

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