Calcium nanoparticles (Ca-NPs) improve drought stress tolerance in Brassica napus by modulating the photosystem II, nutrient acquisition and antioxidant performance

Ayyaz, Ahsan; Fang, Rouyi; Ma, Jun; Hannan, Fakhir; Huang, Qian; Athar, Habib‐ur‐Rehman; Sun, Yongqi; Javed, Muhammad; Ali, Shafaqat; Zhou, Weijun; Farooq, Muhammad Ahsan

doi:10.1016/j.impact.2022.100423

Cited by 31 publications

(19 citation statements)

References 95 publications

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“…This is the first study to report the positive effects of green-synthesized hematite (αFe 2 O 3 ) NPs on the growth of sorghum bicolor under drought stress. In agriculture, NPs are commonly exogenously applied during irrigation, or mixed with soil [ 24 , 26 ], whereas recent studies documented the foliar application of NPs in agriculture [ 25 , 62 , 63 ]. However, these methods often require high concentrations of NPs, as high as 200 mg/g of soil [ 64 ].…”

Section: Discussionmentioning

confidence: 99%

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Ndou

Rakgotho

Nkuna

et al. 2023

Plants

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Drought is a major abiotic stress that confronts plant growth and productivity, thus compromising food security. Plants use physiological and biochemical mechanisms to cope with drought stress, but at the expense of growth. Green-synthesized nanoparticles (NPs) have gained great attention in agriculture due to their environmental friendliness and affordability while serving as potential biofertilizers. This study investigates the role of hematite (αFe2O3) NPs, synthesized from Aspalathus linearis (rooibos), to improve Sorghum bicolor growth under drought stress. About 18 nm, spherical, and highly agglomerated hematite (αFe2O3) NPs were obtained. Sorghum seeds were primed with 5, 10, and 15 mg/L αFe2O3 NPs, and, after seven days of germination, the seedlings were transferred into potting soil, cultivated for fourteen days, and were subsequently water deprived (WD) for a further seven days. A reduction in plant height (78%), fresh (FW; 35%) and dry (DW; 36%) weights, and chlorophyll (chl) content ((total chl (81%), chla (135%), and chlb (1827%)) was observed in WD plants, and this correlated with low nutrients (Mg, Si, P, and K) and alteration in the anatomic structure (epidermis and vascular bundle tissues). Oxidative damage was observed as deep blue (O2●−) and brown (H2O2) spots on the leaves of WD plants, in addition to a 25% and 40% increase in oxidative stress markers (H2O2 and MDA) and osmolytes (proline and total soluble sugars), respectively. Seed priming with 10 mg/L αFe2O3 NPs improved plant height (70%), FW (56%), DW (34%), total Chl (104%), chla (160%) and chlb (1936%), anatomic structure, and nutrient distribution. Priming with 10 mg/L αFe2O3 NPs also protected sorghum plants from drought-induced oxidative damage by reducing ROS formation and osmolytes accumulation and prevented biomolecule degradation. The study concludes that green synthesized hematite NPs positively influenced sorghum growth and prevented oxidative damage of biomolecules by improving nutrient uptake and osmoregulation under drought stress.

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Section: Discussionmentioning

confidence: 99%

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Ndou

Rakgotho

Nkuna

et al. 2023

Plants

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“…Thus, NPs can easily enter stomatal openings (Lv et al, 2019), as reported by He et al (2022), who used silver NPs (Ag‐NPs) on Arabidopsis (C3) to reveal the importance of the stomatal pathway for NP penetration. Foliar application of calcium NPs (Ca‐NPs) increased photosynthesis and stomatal conductance in rapeseed ( Brassica napus L.) (C3) (Ayyaz et al, 2022). Attaran Dowom et al (2022) studied the effect of chitosan NPs (CNPs) on Salvia abrotanoides (Kar.)…”

Section: Improving Photosynthesis Under Drought Stressmentioning

confidence: 99%

Plant photosynthetic responses under drought stress: Effects and management

Zahra

Hafeez

Kausar

et al. 2023

J Agronomy Crop Science

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Balanced photosynthesis is essential for improved plant survival and agricultural benefits in terms of biomass and yield. Photosynthesis is the hub of energy metabolism in plants; however, drought stress (DS) strongly perturbs photosynthetic efficiency due to biochemical and diffusive limitations that reduce key photosynthetic components and close stomata. This review describes photosynthetic responses, chloroplast retrograde signalling, and genetic imprints that curtail DS damage to photosynthetic machinery. While stomatal closure, disrupted photosynthetic systems, over‐reduced electron transport rates (ETR), partial hindrance of the Calvin cycle, and reduced pigment contents strongly affect the repertoire of photosynthetic processes under DS, chloroplast retrograde signalling also has a plausible role in preserving photosynthetic capacity. Progress in agronomic, genetic engineering approaches and isoprene regulation would help to rescue photosynthetic apparatus under DS.

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“…Similarly, ZnO nanoparticles exposure mediates the transcript level of ABA synthesis and catabolism-related genes. Further proteomic, transcriptomic, epigenetic, and other omic-based examinations will provide insight into the regulatory role of nano-sized pollutants in the stress resistance of future plant cultivars [109][110][111][112].…”

Section: Concluding Remarks On Crossroads Between Abiotic Stresses An...mentioning

confidence: 99%

Perspective Chapter: Plant Abiotic Stress Factors – Current Challenges of Last Decades and Future Threats

Gümüş¹,

Meriç²,

Ayan³

et al. 2023

Plant Abiotic Stress Responses and Tolerance Mechanisms

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All life forms, from the simplest to the most complicated, are inevitably exposed to altering environmental conditions in their natural habitats, gradually depending on their lifestyle. Unfavorable alterations drive these life forms either to avoidance or defense as a response. Most of the essential plant growth-promoting environmental factors can also turn out to be stress factors. Water as the most abundant molecule of all living cells can cause stress either in deficit as drought or in excess as waterlogging. Temperature is important for the maintenance of all biomolecules and metabolic reactions; hence, both low and high temperatures are deleterious stress factors. Even though the plants were exposed to various volcanic origin, heavy metals and pollutants and evolved molecular mechanisms during millions year of evolution, rapid urbanization, and industrial progress introduce brand new pollutants as micro- and nanoplastics as well as nanoparticles to plants like never before. This chapter defines and evaluates major environmental abiotic stress factors with an emphasis on the latest knowledge of molecular effects on plants. In addition, novel stress factors, such as nanoparticles and microplastics, are looked over as hot prospects for the future of plant abiotic stress areas.

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Calcium nanoparticles (Ca-NPs) improve drought stress tolerance in Brassica napus by modulating the photosystem II, nutrient acquisition and antioxidant performance

Cited by 31 publications

References 95 publications

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Green Synthesis of Iron Oxide (Hematite) Nanoparticles and Their Influence on Sorghum bicolor Growth under Drought Stress

Plant photosynthetic responses under drought stress: Effects and management

Perspective Chapter: Plant Abiotic Stress Factors – Current Challenges of Last Decades and Future Threats

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