Investigation of seed germination indices for early selection of salinity tolerant genotypes: a case study in wheat

Aflaki, Fatemeh; Sedghi, Mohammad; Pazuki, Arman; Pessarakli, Mohammad

doi:10.9755/ejfa.2016-12-1940

Cited by 30 publications

(27 citation statements)

References 20 publications

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“…Accordingly, the reduction of growth may be attributed to osmotic imbalance and ion toxicity under continuous exposure of the plant to saline conditions leading to changing in their morphology and anatomy (Singh, 2016). Similar observations were reported by Aflaki et al (2017) in wheat.…”

Section: Germination and Plant Growthsupporting

confidence: 73%

“…Wheat seedlings are more sensitive to salinity during germination than during emergence and early seedlings growth (Aflaki et al, 2017). In the present study, Gemeza.9 couldn't tolerate high NaCl level (200 mM) and its germination percentage was reduced (Table 1 and 2) also, all growth parameters were decreased in response to salinity stress (Table 3).…”

Section: Germination and Plant Growthmentioning

confidence: 76%

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Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

et al. 2017

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T HE PRESENT study was carried out to investigate the effect of high NaCl concentrations on some growth parameters and physiological processes of wheat (Triticum aestivum L.) plant. The results indicated that Gemeza.9 was the most sensitive cultivar to high salinity levels compared to all tested wheat cultivars. Moreover, salinity stress caused a reduction in the germination percentage by 65% and all growth parameters by 21%, 25% and 60% in the lengths of shoot, root and leaf area, also by 27% and 48% in fresh weights of shoot, root and 40% and 75% in dry weights of shoot and root. It also increased the activity of antioxidant enzymes (peroxidase and catalase), lipid peroxidation and ascorbic acid content. Salinity induced increase of osmolytes compounds such as total soluble proteins, carbohydrates and amino acids. Furthermore, all measured yield parameters, the percentage of grain's maturity and productivity were highly decreased. Accordingly, the role of potassium humate and potassium silicate either sole or combined in alleviating the toxic effect of salinity was also studied. Results showed that application of potassium humate as sole had a stimulatory effect higher than potassium silicate or their combination. It increased the germinating percentage by 128% at 200mM NaCl. In addition, potassium humate and potassium silicate increased the photosynthetic activity, decreased the activity antioxidant enzymes (Peroxidase and Catalase) as well as biosynthesis of MDA and ascorbic acid also they induced increase biosynthesis of proteins and carbohydrates in yielded grains. Accordingly, our study recommends the application of potassium humate as an organic fertilizer and potassium silicate as a foliar spray for improving the quality and quantity of the sensitive wheat cultivar Gemeza.9 cultivated in salty lands and increases its productivity.

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Section: Germination and Plant Growthsupporting

confidence: 73%

Section: Germination and Plant Growthmentioning

confidence: 76%

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

et al. 2017

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“…A similar findings have been demonstrated in several plant species, such as wheat [22] and orange [87]. The current study showed that chilling stress declined the AsA, carotenoids, and TPC (Figure 3d-f); similar results were observed in rice [91] and Vitis vinifera under chilling [92,93]; tomato [94] and Solanum lycopersicum [95]under salt stress. On the other hand, the application of NO to chilling-stressed plants significantly increased AsA, TPC, and carotenoids contents (Figure 3d-f), which was also supported by PCA that showed a stronger correlation between these antioxidant content and NO-supplemented chilling-stressed treatment (Figure 5b).…”

Section: Discussionsupporting

confidence: 89%

“…On the other hand, the application of NO to chilling-stressed plants significantly increased AsA, TPC, and carotenoids contents (Figure 3d-f), which was also supported by PCA that showed a stronger correlation between these antioxidant content and NO-supplemented chilling-stressed treatment (Figure 5b). Several studies have also reported the NO-mediated increase in the non-enzymatic antioxidants which alleviate a wide range of abiotic stress in various plants, such as Solanum Lycopersicum [95] and tomato [94] under salt stress. Enhanced non-enzymatic antioxidants might scavenge chilling-induced ROS (Figure 2a, c), which contributed to the enhanced growth and development of rice plants (Figure 1a; Table 2).…”

Section: Discussionmentioning

confidence: 99%

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Sohag¹,

Tahjib‐Ul‐Arif²,

Afrin³

et al. 2020

Preprint

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Being a chilling-sensitive staple crop, rice (Oryza sativa L.) is vulnerable to climate change. The competence of rice to withstand chilling stress should, therefore, be enhanced through technological tools. The present study employed chemical intervention like application of sodium nitroprusside (SNP) as nitric oxide (NO) donor and elucidated the underlying molecular mechanisms of NO-mediated chilling tolerance in rice. At germination stage, germination indicators were interrupted by chilling stress (5.0 ± 1.0°C for 8 h day‒1), while pretreatment with 100 μM SNP markedly improved the indicators. At seedling stage (14-day-old), chilling stress caused stunted growth with visible toxicity along with alteration of biochemical markers, for example, increase in oxidative stress markers (superoxide, hydrogen peroxide, and malondialdehyde) and osmolytes (total soluble sugar; proline and soluble protein content, SPC), and decrease in chlorophyll (Chl), relative water content (RWC), and antioxidants. However, NO application attenuated toxicity symptoms with improving growth performance which might be attributed to enhanced activities of antioxidants, mineral contents, Chl, RWC and SPC. Furthermore, principal component analysis indicated that water imbalance and increased oxidative damage were the main contributors to chilling injury, whereas NO-mediated mineral homeostasis and antioxidant defense were the critical determinants for chilling tolerance in rice. Collectively, our findings revealed that NO protects against chilling stress through valorizing cellular defense mechanisms, suggesting that exogenous application of NO could be a potential tool to evolve cold tolerance as well as climate resilience in rice.

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“…In fact, drought is a serious problem for crop production in arid and semi-arid areas of the world. Despite having an optimal range of between 500 and 650 mm of water during its production cycle [3], intra-seasonal drought episodes due to climate change are strongly linked to the yield loss of sesame crops in the Sudano-Sahelian zone [4,5,6], particularly when they reach critical stages during their growth and development cycle [1,7]. Indeed, not all stages of development have the same vulnerability; and the resulting consequence on vegetative growth, flowering, and maturity and consequently on the physiological quality of harvested seeds differ [6,8,9].…”

Section: Introductionmentioning

confidence: 99%

Performance of Sesame Seeds Produced from Plants Subjected to Water Stress for Early Selection of Tolerant Genotypes

Ekom

Guidjinga

Memena

et al. 2019

IJPSS

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Intra-seasonal drought episodes during the life cycle of plant growth of sesame affect physiological quality of seeds harvested. For this purpose, in this study, we explored the following water treatments: W1 (Irrigation throughout the cycle, non-stress treatment), W2 (water stress at the vegetative growth phase), W3 (water stress at the flowering to early pod formation), W4 (water stress at the fruit maturation phase) and W5 (water stress in all phases); for their effect on germination capacity and seedling from the produced seeds of four sesame varieties (“SN 203”, “SN 403”, “SN 01-06” and “Ngong”). Such studies allowed evaluating the performance of the seeds harvested from the plants subjected to water stress availability during the different phenological phases of each variety. The produced seeds were evaluated by reduction rate (%) of germination percentage, first germination count, germination speed index, mean germination time, coefficient of velocity of germination, seedling emergence, seedling length, seedling fresh weight and seedling dry weight. In general, sesame seeds from plants grown under water deficit display reduction in performance. In water stress at the fruit maturation phase (W4) and water stress in all phases (W5), the sesame varieties tested are more sensitive for both germination capacity and seedling and for seedling respectively; so that water limitation during these periods results in the production of seeds with reduction in performance more intense. Among the varieties tested, “SN 01-06” and “Ngong” were the most tolerant genotypes. These results will be used for extension of sesame and for genetic improvement program.

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Investigation of seed germination indices for early selection of salinity tolerant genotypes: a case study in wheat

Cited by 30 publications

References 20 publications

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Performance of Sesame Seeds Produced from Plants Subjected to Water Stress for Early Selection of Tolerant Genotypes

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