Trace Elements in Abiotic Stress Tolerance

Khan, Mumtaz; Ahmad, Roslina; Khan, Muhammad Daud; Rizwan, Muhammad; Ali, Shafaqat; Khan, Muhammad Jamil; Azam, Muhammad; Irum, Ghazala; Ahmad, Mirza Nadeem; Zhu, Shuijin

doi:10.1007/978-981-10-9044-8_5

Cited by 12 publications

(5 citation statements)

References 86 publications

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“…In addition to Ca 2+ , Diaporthe also improved Mg 2+ in roots (regardless of salinity) and Zn in roots of plants under salinity. These nutrients are important in plants, regulating various metabolic pathways involved in abiotic stress tolerance ( Khan et al, 2018 ). The fact that those nutrients accumulate in roots and are not mobilized to shoots could be due to an adequate concentration in shoots.…”

Section: Discussionmentioning

confidence: 99%

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

et al. 2022

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Some microbiome components can provide functions that extend the capabilities of plants, increasing the environmental adaptability and performance of holobionts. Festuca rubra subsp. pruinosa is a perennial grass adapted to rocky sea cliffs, where soil and nutrients are very limited, and exposure to salinity is continuous. This study aimed to investigate if a Diaporthe fungal endophyte belonging to the core microbiome of Festuca rubra roots could improve the performance of two agricultural grasses. In a greenhouse experiment, plants of tritordeum (Triticum durum x Hordeum chilense) and perennial ryegrass (Lolium perenne) were inoculated with Diaporthe strain EB4 and subjected to two salinity conditions (0 and 200 mM NaCl). Biomass production, mineral elements, proline, hormone profiles, antioxidant capacity, and total phenolic compounds were examined in plants, and fungal functions potentially related to the promotion of plant growth were determined. The inoculation with Diaporthe promoted plant growth of both grasses, increasing leaf biomass (84% in tritordeum and 29% in perennial ryegrass), root biomass, nutrient content (N, Ca, Mg, and Fe), and the production of indole 3-acetic acid, regardless of the salinity treatment. Improved growth and nutrient uptake might occur because Diaporthe produces several extracellular enzymes capable of recycling organic nutrient pools. In addition, the fungus produced indole 3-acetic acid in vitro and modulated the production of this phytohormone in the plant. Under salinity, the activity of Diaporthe ameliorated the stress, increasing proline, nutrient uptake in roots, gibberellins, and indole 3-acetic acid, which in turn results into improved growth. Thus, this fungus can transfer to alternative hosts some advantages useful at its original habitat.

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Section: Discussionmentioning

confidence: 99%

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

et al. 2022

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“…This borate diester pectin‐crosslink controls the mechanical properties of the primary cell wall, demonstrating a main role of B in plant growth. Further, B is involved in water relations, ion uptake and transport, and metabolism of carbohydrates and plant hormones (Karthika et al, 2018; Khan et al, 2018; Kumari et al, 2022). Thus, B deficiency resulted in growth retardation, stomatal conductance reduction and photosynthesis decline (Bolaños et al, 2023; Chen et al, 2022; Shah et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

B₂O₃ nanoparticles alleviate salt stress in maize leaf growth zones by enhancing photosynthesis and maintaining mineral and redox status

El‐Shafey,

Avramova,

Beemster

et al. 2023

Physiologia Plantarum

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Salt stress induces significant loss in crop yield worldwide. Although the growth‐stimulating effects of micronutrient nanoparticles (NPs) application under salinity have been studied, the molecular and biochemical mechanisms underlying these effects are poorly understood. The large size of maize leaf growth zones provides an ideal model system to sample and investigate the molecular and physiological bases of growth at subzonal resolution. Using kinematic analysis, our study indicated that salinity at 150 mM inhibited maize leaf growth by decreasing cell division and expansion in the meristem and elongation zones. Consistently, salinity downregulated cell cycle gene expression (wee1, mcm4, and cyclin‐B2‐4). B2O3 NP (BNP) mitigated the stress‐induced growth inhibition by reducing the decrease in cell division and expansion. BNP also enhanced the photosynthesis‐related parameters. Simultaneously, chlorophyll, phosphoenolpyruvate carboxylase and ribulose‐1,5‐bisphosphate carboxylase/oxygenase were stimulated in the mature zone. Concomitant with growth stimulation by BNP, mineral homeostasis, particularly for B and Ca, was monitored. BNP reduced oxidative stress (e.g., lessened H2O2 generation along the leaf zones and reduced lipid peroxidation in the mature zone) induced by salinity. This resulted from better maintenance of the redox status, that is, increased the glutathione‐ascorbate cycle in the meristem and elongation zones, and flavonoids and tocopherol levels in the mature zone. Our study has important implications for assessing the salinity stress impact mitigated by BNP on maize growth, providing a basis to improve the resilience of crop species under salinity stress conditions.

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“…Wheat ( Triticum aestivum L.) grains are sensitive to a variety of environmental stresses throughout their growth period, such as salt, extreme temperatures, and drought12, which affect the crop production. Wheat crops need adequate water to reach their yield potential, and the lack of soil moisture during critical growth stages, especially grain filling, negatively affects productivity34.…”

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confidence: 99%

Involvement of ethylene and polyamines biosynthesis and abdominal phloem tissues characters of wheat caryopsis during grain filling under stress conditions

Yang

Yin

et al. 2017

Sci Rep

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Severe water deficit (SD) severely limited the photo-assimilate supply during the grain-filling stages. Although the ethylene and polyamines (PAs) have been identified as important signaling molecules involved in stress tolerance, it is yet unclear how 1-Aminocylopropane-1-carboxylic acid (ACC) and PA biosynthesis involving wheat abdominal phloem characters mitigate SD-induced filling inhibition. The results obtained indicated that the SD down-regulated the TaSUT1 expression and decreased the activities of sucrose synthase (SuSase, EC2.4.1.13), ADP glucose pyrophosphorylase (AGPase, EC2.7.7.27), soluble starch synthase (SSSase, EC2.4.1.21), then substantially limited grain filling. As a result, increased ACC and putrescine (Put) concentrations and their biosynthesis-related gene expression reduced spermidine (Spd) biosynthesis under SD condition. And, the ACC and PA biosynthesis in inferior grains was more sensitive to SD than that in superior grains. Intermediary cells (ICs) of caryopsis emerged prematurely under SD to compensate for the weakened photo-assimilate transport functions of sieve elements (SEs). Finally, plasmolysis and nuclear chromatin condensation of phloem parenchyma cells (PPC) and membrane degradation of SEs, as well as the decreased ATPase activity on plasma membranes of ICs and PPC at the later filling stage under SD were responsible for the considerably decreased weight of inferior grains.

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Trace Elements in Abiotic Stress Tolerance

Cited by 12 publications

References 86 publications

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

B₂O₃ nanoparticles alleviate salt stress in maize leaf growth zones by enhancing photosynthesis and maintaining mineral and redox status

Involvement of ethylene and polyamines biosynthesis and abdominal phloem tissues characters of wheat caryopsis during grain filling under stress conditions

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Trace Elements in Abiotic Stress Tolerance

Cited by 12 publications

References 86 publications

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

A Diaporthe Fungal Endophyte From a Wild Grass Improves Growth and Salinity Tolerance of Tritordeum and Perennial Ryegrass

B2O3 nanoparticles alleviate salt stress in maize leaf growth zones by enhancing photosynthesis and maintaining mineral and redox status

Involvement of ethylene and polyamines biosynthesis and abdominal phloem tissues characters of wheat caryopsis during grain filling under stress conditions

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B₂O₃ nanoparticles alleviate salt stress in maize leaf growth zones by enhancing photosynthesis and maintaining mineral and redox status