Biochemical and molecular responses of flax to 24-epibrassinosteroide seed priming under drought stress

Aghaee, P.; Rahmani, Fatemeh

doi:10.1080/17429145.2019.1618503

Cited by 13 publications

(14 citation statements)

References 52 publications

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“…The highest amount of MDA was produced in the first year of the experiment ( Figure 3 A). In this research, like other investigations done on bananas [ 32 ], wheat [ 19 ] and chickpea [ 33 ], the lipid peroxidation significantly increased by increasing the severity of water limitation ( Figure 4 A), which indicated that more oxidative damage occurred [ 19 ]. According to these assertations, the obtained results and the data represented in Table 4 , the severity of drought stress was greater in year one than in year two.…”

Section: Discussionsupporting

confidence: 81%

“…APX is recognized as the most important peroxidase in H 2 O 2 detoxification [ 19 ]. The application of brassinolide at 1 μM concentration had the greatest impact on APX activity ( Figure 2 A).…”

Section: Discussionmentioning

confidence: 99%

“…Lipid peroxidation was determined by measuring the malondialdehyde (MDA, a product of unsaturated fatty acid peroxidation) content [ 19 ]. Leaf samples (100 mg) were homogenized with 1 mL of trichloroacetic acid (20%, w/v ) and centrifuged at 15,000× g for 10 min at 4 °C.…”

Section: Methodsmentioning

confidence: 99%

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Biological Response of Lallemantia iberica to Brassinolide Treatment under Different Watering Conditions

Naservafaei

Sohrabi

Moradi

et al. 2021

Plants

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Lallemantia iberica (L. iberica) is an important dry season medicinal plant. Drought, an important abiotic stress, adversely affects the plant’s metabolism, which can be alleviated by plant growth regulators like brassinolides. A two-year field experiment was conducted in 2017–2018 to determine the effects of three different irrigation regimes and four brassinolide concentrations on the L. iberica biochemical properties. A split-plot based on a completely randomized block design in three replicates was used as an experimental design with the following irrigation regimes: full watering, watering until flowering and watering until branching. These were the main plots, and 0, 0.5, 1 and 1.5 μM brassinolide concentrations were applied as the subplots. The results showed that many antioxidant enzymes and some biochemical parameters were affected by brassinolide treatment. Furthermore, the highest membrane stability and grain yield were produced in full watering treatment in the second year, and these treatments were not affected by brassinolide application. Several concentrations of brassinolide differently affected the studied treatments, and our study suggests that the amelioration of the effects of the drought stress on L. iberica could possibly be achieved through brassinolide-induced elevation of reactive oxygen species (ROS) scavenging defense systems. There is a need for complementary research to prove the effectiveness of foliar application of this growth regulator to improve the growth and yield of L. iberica under water shortage conditions.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

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Biological Response of Lallemantia iberica to Brassinolide Treatment under Different Watering Conditions

Naservafaei

Sohrabi

Moradi

et al. 2021

Plants

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“…Proline and free amino acids content were accumulated in quinoa seeds treated with all treatment (Table 5). In agreement with our findings, there is a report revealing an increase in the proline content following application of brassinosteroids (28-HBL and 24-EBL) in sorghum and flax plants 46,47 .…”

Section: Discussionsupporting

confidence: 93%

Physiological Role of Brassinosteroids and Cauliflower Extract on Quinoa Plant Grown under Sandy Soil

Sad¹,

E²,

Dawood³

et al. 2020

Asian J. of Applied Sciences

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Background and Objective: Cauliflower extract is a source of brassinosteroids. Brassinosteroids are steroidal phytohormones which regulate plant growth, development and plant productivity. Thus, it could be used in improving growth and increasing plant yield under newly reclaimed sandy soil. Materials and Methods: Two field experiments were carried out, during 2 successive winter seasons to compare between the effect of brassinosteroids and 80% ethanolic extract of cauliflower buds on growth, some biochemical parameters, yield quantity and quality of quinoa plant grown under sandy soil conditions. Results: Results showed that brassinosteroids and 80% ethanolic extract of cauliflower significantly increased growth criteria of quinoa plant (plant height, branches and leaves number/plant, fresh and dry weight/plant), photosynthetic pigments (chlorophyll a, b, carotenoid and total photosynthetic pigments), seeds yield/plant, yield attributes (plant height, number of fruiting branches, dry weight of plant and 1000 seeds weight) as well as nutritional value of the yielded seeds (carbohydrate, oil, protein, proline and free amino acids contents as well as N, P, K content), antioxidant compounds (flavonoids and phenolic compound) and antioxidant activity. Conclusion: Cauliflower extract at different concentrations were more effective in increasing plant growth, quality and quantity of the yielded quinoa seeds than brassinosteroids treatments. The results indicated that cauliflower extract at 200 mg LG 1 was the most pronounced treatment.

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“…Aside from higher antioxidant enzyme activities, their transcript levels ( FeSOD , POD , and CAT ) increased by EBR application under drought stress and play a role in conferring drought tolerance. The higher expression of MnSOD , POD1 , and POD3 in flax [ 71 ], Cu/Zn-SOD in common beans [ 72 ], Cu/ZnSOD and CAT in rice [ 73 ] under drought stress due to EBR application can also curb oxidative stress at gene transcript levels. The results of this study showed that EBR application under drought stress increased the activities of SOD, POD, and CAT and upregulated FeSOD , POD , and CAT genes, along with a higher accumulation of proline ( P5CS1 gene transcript levels) and SS ( Figure 9 ), all of which decrease ROS levels and help tobacco plants to adapt to drought stress.…”

Section: Discussionmentioning

confidence: 99%

Application of 2,4-Epibrassinolide Improves Drought Tolerance in Tobacco through Physiological and Biochemical Mechanisms

Khan

Hussain

et al. 2022

Biology

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Drought stress is a major abiotic stress that hinders plant growth and development. Brassinosteroids (BR), including 2,4-epibrassinolide (EBR), play important roles in plant growth, development, and responses to abiotic stresses, including drought stress. This work investigates exogenous EBR application roles in improving drought tolerance in tobacco. Tobacco plants were divided into three groups: WW (well-watered), DS (drought stress), and DSB (drought stress + 0.05 mM EBR). The results revealed that DS decreased the leaf thickness (LT), whereas EBR application upregulated genes related to cell expansion, which were induced by the BR (DWF4, HERK2, and BZR1) and IAA (ARF9, ARF6, PIN1, SAUR19, and ABP1) signaling pathway. This promoted LT by 28%, increasing plant adaptation. Furthermore, EBR application improved SOD (22%), POD (11%), and CAT (5%) enzyme activities and their related genes expression (FeSOD, POD, and CAT) along with a higher accumulation of osmoregulatory substances such as proline (29%) and soluble sugars (14%) under DS and conferred drought tolerance. Finally, EBR application augmented the auxin (IAA) (21%) and brassinolide (131%) contents and upregulated genes related to drought tolerance induced by the BR (BRL3 and BZR2) and IAA (YUCCA6, SAUR32, and IAA26) signaling pathways. These results suggest that it could play an important role in improving mechanisms of drought tolerance in tobacco.

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Biochemical and molecular responses of flax to 24-epibrassinosteroide seed priming under drought stress

Cited by 13 publications

References 52 publications

Biological Response of Lallemantia iberica to Brassinolide Treatment under Different Watering Conditions

Biological Response of Lallemantia iberica to Brassinolide Treatment under Different Watering Conditions

Physiological Role of Brassinosteroids and Cauliflower Extract on Quinoa Plant Grown under Sandy Soil

Application of 2,4-Epibrassinolide Improves Drought Tolerance in Tobacco through Physiological and Biochemical Mechanisms

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