Physiological and metabolic dynamism in mycorrhizal and non-mycorrhizal Oryza sativa (var. Varsha) subjected to Zn and Cd toxicity: a comparative study

Janeeshma, Edappayil; Puthur, Jos T.

doi:10.1007/s11356-022-22478-y

Cited by 6 publications

(2 citation statements)

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“…For example, AMF increased the Cd concentration in the stems and roots of Solanum nigrum L. grown in Cd-polluted soils (Liu et al, 2015). AMF stabilizes Cd ions in soil and limits Cd absorption by plants, thus ensuring the normal metabolic function of plants, and improving the plant tolerance to Cd toxicity (Janeeshma et al, 2022). Similarly, DSE promoted the fixation of Cd in roots and limited the transfer of Cd from roots to shoots (Xiao et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Under Cd stress, AMF increases the net photosynthetic rates of host plants (Zhang et al, 2017), promotes GSH metabolism in crops, alleviates the hormone imbalances caused by Cd stress (Zhan et al, 2017) and reduces the toxic effects of Cd stress on plants (AbdaAllah et al, 2015). AMF colonization in rice roots helped to improve rice tolerance to metals by stabilizing the Cd content in the rhizosphere and the Zn content in the root tissues where the fungal hyphal ramification was prominent (Janeeshma and Puthur, 2022). AMF promoted Cd binding to plant roots, inhibited Cd transport to leaves, and reduced Cd concentrations in leaves (Gu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The coexistence of arbuscular mycorrhizal fungi and dark septate endophytes synergistically enhanced the cadmium tolerance of maize

Wang,

Liang

et al. 2024

Front. Plant Sci.

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IntroductionArbuscular mycorrhizal fungi (AMF) and dark septate endophytic fungi (DSEs) generally coexist in the roots of plants. However, our understanding of the effects of their coexistence on plant growth and stress resistance is limited.MethodsIn the present study, the effects of single and dual inoculation of AMF and DSE on the growth, photosynthetic physiology, glutathione (GSH) metabolism, endogenous hormones, and cadmium (Cd) content of maize under 25 mg•kg-1 Cd stress were investigated.ResultsCompared with that after the non-inoculation treatment, AMF+DSE co-inoculation significantly increased the photosynthetic rate (Pn) of maize leaves; promoted root GSH metabolism; increased the root GSH concentration and activity of γ-glutamyl cysteine synthase (γ-GCS), ATP sulfatase (ATPS) and sulfite reductase (SIR) by 215%, 117%, 50%, and 36%, respectively; and increased the concentration of endogenous hormones in roots, with increases in zeatin (ZR), indole-3 acetic acid (IAA), and abscisic acid (ABA) by 81%, 209%, and 72%, respectively. AMF inoculation, DSE inoculation and AMF+DSE co-inoculation significantly increased maize biomass, and single inoculation with AMF or DSE increased the Cd concentration in roots by 104% or 120%, respectively. Moreover, significant or highly significant positive correlations were observed between the contents of ZR, IAA, and ABA and the activities of γ-GCS, ATPS, and SIR and the glutathione (GSH) content. There were significant or highly significant positive interactions between AMF and DSE on the Pn of leaves, root GSH metabolism, and endogenous hormone contents according to two-way analysis of variance. Therefore, the coexistence of AMF and DSE synergistically enhanced the Cd tolerance of maize.

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Section: Discussionmentioning

confidence: 99%