Evaluating the Drought Stress Tolerance Efficiency of Wheat (Triticum Aestivum L.) Cultivars

Raza, Sammar; Saleem, M. F.; Khan, Ikhtiar; Jamil, Moazzam; Ijaz, Muhammad; Khan, Minhaj Ahmad

doi:10.18551/rjoas.2012-12.04

Cited by 19 publications

(11 citation statements)

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“…The experimental design was a completely randomized design with three replicates. Germination parameters like germination percentage, seedling length, and vigor index were taken after 15 days of germination [ 75 ]. The formula used was as follows: Germination percentage = Number of seeds germinated/Total number of seeds × 100, Vigor index = Germination index × Seedling biomass.…”

Section: Methodsmentioning

confidence: 99%

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Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

et al. 2021

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Plant growth-promoting rhizobacteria (PGPR) mediate heavy metal tolerance and improve phytoextraction potential in plants. The present research was conducted to find the potential of bacterial strains in improving the growth and phytoextraction abilities of Brassica nigra (L.) K. Koch. in chromium contaminated soil. In this study, a total of 15 bacterial strains were isolated from heavy metal polluted soil and were screened for their heavy metal tolerance and plant growth promotion potential. The most efficient strain was identified by 16S rRNA gene sequencing and was identified as Bacillus cereus. The isolate also showed the potential to solubilize phosphate and synthesize siderophore, phytohormones (indole acetic acid, cytokinin, and abscisic acid), and osmolyte (proline and sugar) in chromium (Cr+3) supplemented medium. The results of the present study showed that chromium stress has negative effects on seed germination and plant growth in B. nigra while inoculation of B. cereus improved plant growth and reduced chromium toxicity. The increase in seed germination percentage, shoot length, and root length was 28.07%, 35.86%, 19.11% while the fresh and dry biomass of the plant increased by 48.00% and 62.16%, respectively, as compared to the uninoculated/control plants. The photosynthetic pigments were also improved by bacterial inoculation as compared to untreated stress-exposed plants, i.e., increase in chlorophyll a, chlorophyll b, chlorophyll a + b, and carotenoid was d 25.94%, 10.65%, 20.35%, and 44.30%, respectively. Bacterial inoculation also resulted in osmotic adjustment (proline 8.76% and sugar 28.71%) and maintained the membrane stability (51.39%) which was also indicated by reduced malondialdehyde content (59.53% decrease). The antioxidant enzyme activities were also improved to 35.90% (superoxide dismutase), 59.61% (peroxide), and 33.33% (catalase) in inoculated stress-exposed plants as compared to the control plants. B. cereus inoculation also improved the uptake, bioaccumulation, and translocation of Cr in the plant. Data showed that B. cereus also increased Cr content in the root (2.71-fold) and shoot (4.01-fold), its bioaccumulation (2.71-fold in root and 4.03-fold in the shoot) and translocation (40%) was also high in B. nigra. The data revealed that B. cereus is a multifarious PGPR that efficiently tolerates heavy metal ions (Cr+3) and it can be used to enhance the growth and phytoextraction potential of B. nigra in heavy metal contaminated soil.

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Section: Methodsmentioning

confidence: 99%

Section: Germination Experimentsmentioning

confidence: 99%

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

et al. 2021

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“…Water shortage could result in the decline of cotton yield and quality ( Reddy et al, 2004 ). Water stress can affect cotton crop by altering their morphology, anatomy, physiology and yield ( Raza et al, 2012 ). It may create negative effects on growth stages and yield components like number of bolls plant −1 , boll weight and flower buds plant −1 ( Jaleel et al, 2008 ).…”

Section: Discussionmentioning

confidence: 99%

Kaolin and Jasmonic acid improved cotton productivity under water stress conditions

Nazim

Ali

Shahzad

et al. 2021

Saudi Journal of Biological Sciences

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Drought is one of the most emerging threat that causes a severe reduction in cotton plant growth and development. Being cotton is a major cash crop has great threat to prevailing drought events in Pakistan. A field experiment was conducted in Kharif season 2018 at Research Area of MNS-University of Agriculture, Multan, Pakistan to assess the role of foliar applied kaolin and jasmonic acid on vegetative growth, gas exchange and reproductive traits of cotton under normal irrigated and artificial water deficit conditions. The experiment was laid -out in a factorial randomized complete block design with split – split plot arrangement. Main plots were allocated for irrigation levels, sub-plots for two -cotton genotypes viz. NIAB − 878 and SLH − 19 while sub – sub plots for treatments of kaolin and Jasmonic acid. Water deficit stress was created by skipping irrigation at flowering for 21 days. Foliar sprays of Kaolin (5%, w/v) and Jasmonic acid (100 μM) were applied alone or in combination at 60 days after planntinon both to normal irrigated and water-stresse skip irrigation while irrigation water alone was sprayed in control plots. Both cotton genotypes responded variably to normal irrigated and skip conditions. Skipping irrigation for up to 21 days at flowering caused a significant decrease in leaf relative water content, SPAD values, net photosynthetic rate and seed cotton yield in both the genotypes. Seed cotton yield showed an overall decline of 24.7% in skip over Normal irrigated crop. The genotype NIAB − 878 produced maximum seed cotton yield of 3.304 Mg ha −1 in normal that dropped to 2.579 Mg ha −1 in skip, thus showing an average decline of 21.9 %. Similarly, SLH − 19 produced 2.537 Mg ha −1 seed cotton under normal that dropped to 1.822 Mg ha −1 in skip, showing an average decline of 28.2%. The Application of Kaolin and JA Jasmonic acid, either applied individually or in combination, improved vegetative and reproductive development of both cotton varieties in normal and skip regimes. However, combined kaolin and Jasmonic Acid application proved to be more beneficial in terms of seed cotton production and other parameters studied.

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“…The shoot length was measured form the tip of the primary leaf to the base of the hypocotyle with the help of a scale and mean shoot length was expressed in centimeter. After 8 th day shoot length stress tolerance index (SLSTI) (%) for each genotype was worked out by using the following formula (Sammar Raza et al, 2012) [7] . -------------------------------------------------x 100 Shoot length of control seedling (cm)…”

Section: Methodsmentioning

confidence: 99%

Effect of temperature stress on seedling growth and development in soybean [Glycine max (L.) merrill] genotypes

Rathod¹,

Bharud²,

Parihar³

2020

Int. J. Chem. Stud.

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Temperature is an environmental factor that has a considerable influence on seedling growth and development. It plays a role in seed development, controlling seed yield, composition, and vigor. A laboratory experiment was conducted at Central Phytotron Facility during 2017-2018 in Completely Randomized Block Design (CRD) with two replications. Twenty genotypes were exposed to various temperature regimes viz; control (T1), day/night temperature regime 30 0 C/25 0 C (T2), 32 0 C/27 0 C (T3), 34 0 C/29 0 C (T4), and 36 0 C/31 0 C (T5) under phytotronic conditions for germination in growth chambers 1, 2, 3, 4, and 5 respectively. Ten seeds per replication were sown in Petri plates and were exposed to above temperature regimes upto 8 days and 10000 foot candle light and 1000 ppm CO2 was provided. Among the genotypes KDS-904 (97.75%) recorded significantly maximum shoot length stress tolerance index percent followed by KDS-1032 (97.43%) while genotype KDS-344 (92.36%) recorded significantly minimum shoot length stress tolerance index percent on the eight day. Similarly among the different interactions day/night temperature regime 36/31 0 C treatment on eighth day, genotype DS-288 recorded significantly maximum total seedling length (10.72 cm) followed by same genotype (10.47 cm) under day/night temperature regime 32/27 0 C whereas genotype KDS-904 recorded significantly minimum seedling length (3.73 cm) under control treatment.

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Evaluating the Drought Stress Tolerance Efficiency of Wheat (Triticum Aestivum L.) Cultivars

Cited by 19 publications

References 20 publications

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

Role of Bacillus cereus in Improving the Growth and Phytoextractability of Brassica nigra (L.) K. Koch in Chromium Contaminated Soil

Kaolin and Jasmonic acid improved cotton productivity under water stress conditions

Effect of temperature stress on seedling growth and development in soybean [Glycine max (L.) merrill] genotypes

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