Role of Exogenous 24-Epibrassinolide in Enhancing the Salt Tolerance of Wheat Seedlings

Dong, Yilin; Wang, W.W; Hu, Guoqian; Chen, W.F; Zhuge, Yu Ping; Wang, Z.L; He, Mengying

doi:10.4067/s0718-95162017000300001

Cited by 64 publications

(37 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present study demonstrated that salinity stress can significantly reduce the chlorophyll content of apple seedlings, and exogenous BL treatment can recover the content to normal levels (Figure 2A). The recovery of chlorophyll contents after the exogenous application of BL might be due to the modulation of transcription and translation processes by BR signaling, which ultimately stimulates chlorophyll biosynthesis and inhibits the breakdown of chlorophyll molecules (Sharma et al, 2016;Dong et al, 2017). Moreover, the present study indicated that the photosynthetic rate of the apple seedlings was reduced by salt stress, and exogenous BL application significantly improved photosynthetic rate under salt stress ( Figure 2B).…”

Section: Discussionmentioning

confidence: 52%

Exogenous Brassinolide Alleviates Salt Stress in Malus hupehensis Rehd. by Regulating the Transcription of NHX-Type Na+(K+)/H+ Antiporters

Zheng

Tian

2020

Front. Plant Sci.

View full text Add to dashboard Cite

Brassinolide (BL) mediates various physiological processes and improves plant tolerance to abiotic stresses. However, the effects and mechanism of exogenous BL on the salt tolerance of apple seedlings remain unclear. Herein, we investigated the role of BL in the salt stress response of Malus hupehensis Rehd., a widely grown apple rootstock. Saltstressed apple seedlings showed significant decline in chlorophyll content and photosynthetic rate, and the application of 0.2 mg/L exogenous BL alleviated salt stress and maintained photosynthetic capacity. Exogenous BL application can strengthen the activities of superoxide dismutase and catalase and thereby eliminates reactive oxygen species (ROS) production induced by salt stress and promote the accumulation of proline and soluble sugar, thus maintaining osmotic balance. Furthermore, exogenous BL application decreased Na + accumulation and increased K + content in shoots and roots under salt stress by regulating the expression levels of Na + (K +)/H + antiporter genes (MhNHXs). MhBZR1 and MhBZR2, which are the key transcription factors in the BR signal transduction pathway, can directly bind to the promoter of MhSOS1 and MhNHX4-1, respectively, and inhibit their expression. Our findings would provide a theoretical basis for analyzing the mechanism of exogenous BL application on the salt tolerance of apples.

show abstract

Section: Discussionmentioning

confidence: 52%

Exogenous Brassinolide Alleviates Salt Stress in Malus hupehensis Rehd. by Regulating the Transcription of NHX-Type Na+(K+)/H+ Antiporters

Zheng

Tian

2020

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…18 ℃ 8 h darkness, 65% relative humidity (Dong et al 2017). Seven days after sowing, plants at the same growth stage were selected and transplanted to containers filled with Hoagland solution.…”

Section: Methodsmentioning

confidence: 99%

“…For relative water content was calculated ( Fig. S3) as follow: RWC(%) = (FW - DW)/FW × 100 (Dong et al 2017). The chlorophyll content (Song et al 2016) was determined ( Fig.…”

Section: Measurement Of Biomass and Physiological Index In Wheat Seedmentioning

confidence: 99%

“…Many studies have shown that applying suitable concentration of endogenous substances (plant growth regulator) can improve salt tolerance in plants. Such as jasmonic acid (JA) (Qiu et al 2014), Salicylic Acid (SA ) (Arfan et al 2007), ascorbic acid (AsA) (Shalata and Neumann 2001), mannitol (Seckin et al 2009), and 24-epibrassinolide (Dong et al 2017) can inhibit accumulation of active oxygen species (ROS) and alleviate NaCl damages to plants. Therefore, exogenous application of plant growth regulator gives an effective way to enhance plant resistance in abiotic stress, but the regulating mechanism of such endogenous substances in plant growth remains unclear.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Exogenous Pyridoxal-5-phosphate on Seedling Growth and Development of Wheat under Salt Stress

Liu

Zhang

Lü

et al. 2019

Cereal Research Communications

View full text Add to dashboard Cite

Salt stress is one of the major abiotic stress which severely limits plant growth and reduces crop productivity across the world. In the present study, the effects of exogenous pyridoxal-5-phosphate (vitamin B 6 , VB 6) on seedling growth and development of wheat under salt stress were investigated. The results showed that exogenous application of pyridoxal-5-phosphate (VB 6) significantly increased the RWC, biomass, the concentration of photosynthetic pigments, proline, the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), together with decreasing the content of Malondiadehyde (MDA) and hydrogen peroxide (H 2 O 2) in wheat leaves under salt stress. Meanwhile, the transcript level of P5CR, P5CS, SOD, TaSOS1 and TaSOS4 were also up-regulated after treatment with pyridoxal-5-phosphate. VB 6 acts as a signal in regulating the activities of plant antioxidant enzymes and SOS pathway to improve resistance to salt stress. The current study results may give an insight into the regulatory roles of VB 6 in improving salt stress and VB 6 could be an easily and effective method to improve salt-stress tolerance to wheat in the field condition. It is urgency to understand the molecular mechanism of VB 6 to enhance the salt tolerance of wheat in the next work.

show abstract

“…Changes in osmotic stress and cell structure are induced by Ca(NO 3 ) 2 . Therefore, it leads to increased cellular levels of Ca 2+ and NO 3 − that inhibit plant growth nutritional absorption, especially moisture and ion absorption [3]. Ca 2+ is the second messenger in the plant.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ca(NO3)2 Stress on Mitochondria and Nitrogen Metabolism in Roots of Cucumber Seedlings

Yang

Lǚ

et al. 2020

Agronomy

View full text Add to dashboard Cite

Cucumber is a major vegetable crop grown in facilities, and its seedlings are sensitive to salinity. Thus, it is important for cucumber cultivation to research the effects of Ca(NO3)2. In this study, we investigated salt-sensitive Chunqiu (CQ) and salt-tolerant BoMei 49 (BM) seedlings, the changes to the enzymes involved in the mitochondria antioxidant system in the seedlings, and the changes in the MPTP (Mitochondrial Permeability Transition Pore) opening, mitochondrial membrane fluidity, mitochondrial membrane potential depolarization, mitochondrial electron transfer chain, and NO metabolism in response to Ca(NO3)2. Ca(NO3)2 stresses inhibited the growth of the cucumber seedlings, which showed a reduced root length, a decreased surface area and a decreased number of root tips, but a significantly increased root diameter. The mitochondrial malondialdehyde (MDA) content, H2O2 content, and O2− producing rate of the two cucumber roots were gradually increased in the Ca(NO3)2 treatment. The activity of superoxide dismutase (SOD) and peroxidation enzyme (POD) gradually increased, and catalase (CAT) activity gradually decreased. The electron transport chain activity of “BM” was higher than “CQ” under Ca(NO3)2 stress. Ca(NO3)2 stress destroyed the membrane structure of the mitochondria, so that the mitochondrial body tended to bend, causing double-membrane digestion and a hollow interior. Under the stress of Ca(NO3)2, the NO3− content of the seedlings increased significantly. The contents of NH4+ and NO, as well as the activities of nitrate reductase (NR), nitrite reductase (NIR), and nitric oxide synthase (NOS) decreased significantly. These findings provide physiological insights into root damage in response to salt stress for salt tolerance in cucumber.

show abstract

Role of Exogenous 24-Epibrassinolide in Enhancing the Salt Tolerance of Wheat Seedlings

Cited by 64 publications

References 30 publications

Exogenous Brassinolide Alleviates Salt Stress in Malus hupehensis Rehd. by Regulating the Transcription of NHX-Type Na+(K+)/H+ Antiporters

Exogenous Brassinolide Alleviates Salt Stress in Malus hupehensis Rehd. by Regulating the Transcription of NHX-Type Na+(K+)/H+ Antiporters

The Effects of Exogenous Pyridoxal-5-phosphate on Seedling Growth and Development of Wheat under Salt Stress

Effects of Ca(NO3)2 Stress on Mitochondria and Nitrogen Metabolism in Roots of Cucumber Seedlings

Contact Info

Product

Resources

About