Titanium dioxide nanoparticles model growth kinetic traits of some wheat cultivars under different water regimes

Dawood, Mona F. A.; Abeed, Amany H.A.; Aldaby, Eman S. E.

doi:10.1007/s40502-019-0437-5

Cited by 32 publications

(14 citation statements)

References 31 publications

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“…Drought limits the photosynthesis by retarding the synthesis of photosynthetic pigments. It is well established fact that chlorophyll contents and photosynthetic rate are positively correlated [105,106]. In the present study, NN1-M-wild depicted 17% reduction in chlorophyll content while NN1-M-506 recorded 22% during M 7 generation (Fig 8; Table S2).…”

Section: Total Soluble Sugars (Tsss)supporting

confidence: 66%

EMS-based mutants are useful for enhancing drought tolerance in spring wheat

Zahra¹,

Zulfiqar

Hussain

et al. 2021

Preprint

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Sustainable wheat production in drought prone areas can be achieved by developing resilient wheat varieties. In the present study, chemical mutagenesis was used to induce mutations in a cultivated wheat variety ‘NN-Gandum-1’. In total, 44 mutants were selected based on their high yield potential for exposing to well-watered (W1) and rainfed (W2) conditions for one season. Then 24 mutants were selected, and were exposed to W1 and W2 regimes. On the basis of least relative reduction in physiological parameters under W2 regime, five mutants were selected for conducting exome capturing assays. In total, 184 SNPs were identified in nine genes (ABC transporter type 1, Aspartic peptidase, Cytochrome P450, transmembrane domain, Heavy metal-associated domain, HMA, NAC domain, NAD (P)-binding domain, S-type anion channel, Ubiquitin-conjugating enzyme E2 and UDP-glucuronosyl/UDP-glucosyltransferase). Maximum number of mutations were observed in chr.2D, which contained mutations in three genes i.e. ABC transporter type 1, NAD (P)-binding domain and UDP-glucuronosyl/UDP-glucosyltransferase which may have a role in conferring drought tolerance. The selected mutants were further tested for studying their biochemical responses under both the regimes for two years. The extent of membrane damage was estimated through malondialdehydeand hydrogen per oxidase and tolerance to drought stress was assessed via antioxidant enzymes in leaves. The selected mutants under drought stress increased the accumulation of proline content, total soluble sugars, total free amino acids, while decreased total chlorophyll content, carotenoids and total soluble protein. Finally, the procedure of narrowing down the number of developed mutants from a large mutation population (>4000) is found useful for exploring the complex trait like drought without compromising yield potential. These mutants can further be explored to understand the genetic circuits of drought tolerance in wheat which will pave the way towards improving livelihood of resource poor farming community mostly relying on cereal food.

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Section: Total Soluble Sugars (Tsss)supporting

confidence: 66%

EMS-based mutants are useful for enhancing drought tolerance in spring wheat

Zahra¹,

Zulfiqar

Hussain

et al. 2021

Preprint

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“…In short, at a lower quantity, these green synthesised BBS-NiONPs are biocompatible and have the ability to speed up seed germination by breaking seed dormancy and can act as a growth-promoting agent. The positive response of seeds toward lower concentrations of BBS-NiONPs might be due to various factors such as infiltration of NPs, releasing ions and making a suitable environment for oxygen and water uptake, hence breaking seed dormancy and promoting seedling growth [ 33 , 37 ]. These findings indicate that apart from their potential in the biomedical field, green synthesised NPs could be effectively used in agricultural fields as nano fertilisers as well as stimulatory agents for plant physiology.…”

Section: Discussionmentioning

confidence: 99%

Green Synthesis of Nickel Oxide Nanoparticles from Berberis balochistanica Stem for Investigating Bioactivities

et al. 2021

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Green synthesis of nanomaterials is advancing due to its ease of synthesis, inexpensiveness, nontoxicity and renewability. In the present study, an eco-friendly biogenic method was developed for the green synthesis of nickel oxide nanoparticles (NiONPs) using phytochemically rich Berberis balochistanica stem (BBS) extract. The BBS extract was rich in phenolics, flavonoids and berberine. These phytochemicals successfully reduced and stabilised the NiNO3 (green) into NiONPs (greenish-gray). BBS-NiONPs were confirmed by using UV-visible spectroscopy (peak at 305 nm), X-ray diffraction (size of 31.44 nm), Fourier transform infrared spectroscopy (identified -OH group and Ni-O formation), energy dispersive spectroscopy (showed specified elemental nature) and scanning electron microscopy (showed rhombohedral agglomerated shape). BBS-NiONPs were exposed to multiple in vitro bioactivities to ascertain their beneficial biological applications. They exhibited strong antioxidant activities: total antioxidant capacity (64.77%) and 2, 2-diphenyl-1-picrylhydrazyl (71.48%); and cytotoxic potential: Brine shrimp cytotoxicity assay with IC50 (10.40 µg/mL). BBS-NiONPs restricted the bacterial and fungal pathogenic growths at 1000, 500 and 100 µg/mL. Additionally, BBS-NiONPs showed stimulatory efficacy by enhancing seed germination rate and seedling growth at 31.25 and 62.5 µg/mL. In aggregate, BBS extract has a potent antioxidant activity which makes the green biosynthesis of NiONPs easy, economical and safe. The biochemical potential of BBS-NiONPs can be useful in various biomedical and agricultural fields.

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“…Variation in photosynthetic pigment contents is the key indicator to determine the extent of photosynthesis in plants grown under water stress conditions. It is well known that drought decreases the photosynthetic rate of cereals [15]. The major components limiting photosynthetic rate are the CO 2 diffusional limitation due to early stomatal closure as a response to the drought-induced loss of turgor, reduced activity of photosynthetic enzymes, the biochemical components related to the triose-phosphate formation and decreased the photochemical efficiency of photosystem II [16].…”

Section: Physiological and Biochemical Responsesmentioning

confidence: 99%

“…In barley, grain yield under late drought stress was positively correlated with grain filling duration and gross photosynthetic rate [25]. Furthermore, the tolerant wheat cultivars enhanced total chlorophyll at pre- and post-anthesis stage accompanied by a more stable photosynthetic rate, while susceptible cultivars reduced both traits for both stages [15]. Chlorophyll has a crucial role in plant energy production, thus the susceptible plants suffer from insufficient energy needed for normal growth.…”

Section: Physiological and Biochemical Responsesmentioning

confidence: 99%

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

Sallam

Alqudah

Dawood

et al. 2019

IJMS

Self Cite

389

257

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Climate change is a major threat to most of the agricultural crops grown in tropical and sub-tropical areas globally. Drought stress is one of the consequences of climate change that has a negative impact on crop growth and yield. In the past, many simulation models were proposed to predict climate change and drought occurrences, and it is extremely important to improve essential crops to meet the challenges of drought stress which limits crop productivity and production. Wheat and barley are among the most common and widely used crops due to their economic and social values. Many parts of the world depend on these two crops for food and feed, and both crops are vulnerable to drought stress. Improving drought stress tolerance is a very challenging task for wheat and barley researchers and more research is needed to better understand this stress. The progress made in understanding drought tolerance is due to advances in three main research areas: physiology, breeding, and genetic research. The physiology research focused on the physiological and biochemical metabolic pathways that plants use when exposed to drought stress. New wheat and barley genotypes having a high degree of drought tolerance are produced through breeding by making crosses from promising drought-tolerant genotypes and selecting among their progeny. Also, identifying genes contributing to drought tolerance is very important. Previous studies showed that drought tolerance is a polygenic trait and genetic constitution will help to dissect the gene network(s) controlling drought tolerance. This review explores the recent advances in these three research areas to improve drought tolerance in wheat and barley.

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Titanium dioxide nanoparticles model growth kinetic traits of some wheat cultivars under different water regimes

Cited by 32 publications

References 31 publications

EMS-based mutants are useful for enhancing drought tolerance in spring wheat

EMS-based mutants are useful for enhancing drought tolerance in spring wheat

Green Synthesis of Nickel Oxide Nanoparticles from Berberis balochistanica Stem for Investigating Bioactivities

Drought Stress Tolerance in Wheat and Barley: Advances in Physiology, Breeding and Genetics Research

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