Physiological and biochemical responses of durum wheat under mild terminal drought stress

Khamssi, Nahid Niari; Najaphy, Abdollah

doi:10.14715/cmb/2018.64.4.10

Cell Mol Biol (Noisy-le-grand)

2018

DOI: 10.14715/cmb/2018.64.4.10

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Physiological and biochemical responses of durum wheat under mild terminal drought stress

Nahid Niari Khamssi

Abdollah Najaphy

Abstract: The effects of mild terminal drought stress on physiological parameters and activities of peroxidase (POX), catalase (CAT) and superoxide dismutase (SOD) were investigated in ten durum wheat genotypes using two field experiments under rain-fed (terminal drought stress) and irrigated (non-stress) conditions. Stress intensity was calculated to be 0.1 indicating mild water deficit stress. Based on combined analysis of variance, the mild terminal drought stress increased the activity of CAT while, POX and SOD cont… Show more

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Cited by 4 publications

References 9 publications

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Response characteristics of root to moisture change at seedling stage of Kengyilia hirsuta

Chen

Chen²,

Zhang³

et al. 2023

Front. Plant Sci.

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Kengyilia hirsuta is an important pioneer plant distributed on the desertified grassland of the Qinghai-Tibet Plateau. It has strong adaptability to alpine desert habitats, so it can be used as a sand-fixing plant on sandy alpine land. To study the response mechanisms of root morphological and physiological characteristics of K. hirsuta to sandy soil moisture, 10%, 25% and 40% moisture levels were set up through potted weighing water control method. The biomass, root-shoot ratio, root architecture parameters, and biochemical parameters malondialdehyde, free proline, soluble protein, indole-3-acetic acid, abscisic acid, cytokinin, gibberellin, relative conductivity and antioxidant enzyme activities were measured in the trefoil stage, and the response mechanisms of roots at different moisture levels were analyzed. The results showed that with the increase of soil moisture, root morphological indexes such as root biomass, total root length, total root volume and total root surface increased, while the root topological index decreased continuously. The malondialdehyde content, relative conductivity, superoxide dismutase activity, peroxidase activity, catalase activity, free proline content, soluble protein content, abscisic acid content and cytokinin content at the 25% and 40% moisture levels were significantly decreased compared with the 10% level (P< 0.05). Thus, the root growth of K. hirsuta was restricted by the 10% moisture level, but supported by the 25% and 40% moisture levels. An artificial neural network revealed that total root length, total root surface area, root link average length, relative conductivity, soluble protein, free proline and moisture level were the key factors affecting root development. These research results could contribute to future agricultural sustainability.

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Response characteristics of root to moisture change at seedling stage of Kengyilia hirsuta

Chen

Chen²,

Zhang³

et al. 2023

Front. Plant Sci.

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PGPB Isolated from Drought-Tolerant Plants Help Wheat Plants to Overcome Osmotic Stress

Pishchik,

Chizhevskaya,

Chebotar

et al. 2024

Plants

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The aim of this research was to study the effect of plant-growth-promoting bacteria (PGPB) isolated from the drought-tolerant plants camel thorn (Alhagi pseudoalhagi (M.Bieb.) Fisch) and white pigweed (Chenopodium album L.) on wheat (Triticum aestivum L.) plants cv. Lenigradskaya 6, growing under hydroponic conditions and osmotic stress (generated by 12% polyethylene glycol-6000 (PEG)). Based on the assumption that plants create a unique microbiome that helps them overcome various stresses, we hypothesized that bacteria isolated from drought-tolerant plants may assist cultivated wheat plants in coping with drought stress. PGPB were isolated from seeds and leaves of plants and identified as Bacillus spp. (strains Cap 07D, Cap 09D, and App 11D); Paenibacillus sp. (Cap 286); and Arthrobacter sp. (Cap 03D). All bacteria produced different phytohormones such as indole acetic acid (IAA), abscisic acid (ABA), and gibberellic acid (GAS3) and were capable of stimulating wheat growth under normal and osmotic stress conditions. All PGPB reduced the malondialdehyde (MDA) content, increased the total chlorophyll content by increasing chlorophyll a, and modulated wheat hormone homeostasis and CAT and POX activities under osmotic conditions. Selected strains can be promising candidates for the mitigating of the drought stress of wheat plants.

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Response of Wheat Genotypes to Drought Stress Stimulated by PEG

et al. 2022

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Wheat is a cereal grain crop that is commonly cultivated and is a good source of nutrients that are beneficial to human health. In recent years, the productivity of wheat has been steadily declining, with abiotic pressures accounting for almost half of all yield losses. Drought stress is a significant limiting factor for plant development and production around the planet. The influence of polyethylene glycol (PEG) (at concentrations of 5, 10, and 15%)-induced drought stress on the morphological, physiological, and biochemical characteristics of fifteen wheat genotypes was investigated in this work. Overall, it was discovered that morphological and physiological indicators such as germination % and shoot-root lengths during the seedling stage had reduced significantly. The proline content, on the other hand, was shown to be positively correlated with the concentration of PEG treatments. There was a significant difference between the genotypes HD2733, HD2888, and RAJ3765 regarding tolerance to abiotic stress caused by drought. A further finding was that under stressful settings, the first three main components explained 56.65 percent, 65.06 percent, and 72.47 percent of the total variability in PEG treatment levels of five, ten, and fifteen percent, respectively. These collective morphological and physiological parameters, and analyses of their diverse responses, could be used for screening of drought tolerance among the 15 wheat genotypes to select for significant drought tolerance and diverse molecular responses during breeding of stress resistant forms.

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Physiological and biochemical responses of durum wheat under mild terminal drought stress

Cited by 4 publications

References 9 publications

Response characteristics of root to moisture change at seedling stage of Kengyilia hirsuta

Response characteristics of root to moisture change at seedling stage of Kengyilia hirsuta

PGPB Isolated from Drought-Tolerant Plants Help Wheat Plants to Overcome Osmotic Stress

Response of Wheat Genotypes to Drought Stress Stimulated by PEG

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