The Influence of Brassinosteroid, a Growth-promoting Steroidal Lactone, on Development and CO2-fixation Capacity of Intact Wheat and Mustard Seedlings

Braun, Peter E.; Wild, Aloysius

doi:10.1007/978-94-017-4973-2_104

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…While in case of NRA and soluble protein the maximum response was at 1.0 ppm BR, highest GS activity was observed at 0.1 ppm BR under all conditions. BR induced increase in NR activity (MAI et al 1989 andSHEN et al 1990) and protein content (BRAUN andWILD 1984a andKULAEVA et al 1991) has also been reported earlier.…”

Section: Resultssupporting

confidence: 58%

Effect of Homobrassinolide Application on Metabolic Activity and Grain Yield of Wheat under Normal and Water‐Stress Condition

Sairam

1994

J Agronomy Crop Science

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Activities of nitrate reductase, glutamine synthetase along with rate of photosynthesis, chlorophyll content, soluble protein, relative water content, transpiration and diffusion resistance were estimated in wheat cv. C306 at anthesis stage under irrigated and moisture‐stress condition and two levels (0.1 and 1.0 ppm) of homobrassinolide application. Yield and yield attributing parameters were recorded at harvest. Moisturestress adversely affected relative water content, transpiration, net photosynthesis, nitrate reductase and glutamine synthetase activity, chlorophyll and soluble protein content. Homobrassinolide application increased leaf relative water content and transpiration and decreased diffusion resistance in water‐stressed and recovered plants. Homobrassinolide application also had positive effect on nitrate reductase and glutamine synthetase activities, photosynthesis, chlorophyll and total soluble protein content in stressed, irrigated and revived plants. The beneficial effect was also observed on grain yield and yield attributing parameters such as grain number per ear, 1000 grain weight, ear number per plant and harvest index. It was concluded that homobrassinolide induced promotion in metabolic activity was mediated through increased enzyme protein synthesis as well as uptake of water resulting in enhanced relative water content under moisture‐stress.

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Section: Resultssupporting

confidence: 58%

Effect of Homobrassinolide Application on Metabolic Activity and Grain Yield of Wheat under Normal and Water‐Stress Condition

Sairam

1994

J Agronomy Crop Science

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“…A similar increase in photosynthetic rate due to 24-epBL application has already been observed in wheat (Braun and Wild 1984;Sairam 1994), mustard (Braun and Wild 1984;Hayat et al 2000), and mungbean (Fariduddin et al ). An increase in growth of the two wheat cultivars with an increase in exogenous 24-epiBL application can be related to BR-induced increase in their photosynthetic rates.…”

Section: Discussionsupporting

confidence: 54%

“…Exogenous application of BRs is known to increase photosynthetic rate in some crops, e.g., mustard (Braun and Wild 1984;Hayat et al 2000), and other crop plants (Yang et al 1992;Sairam 1994). Such increase in photosynthetic activity delays senescence and abscission and enhances the vegetative growth of plants as has been observed in Vigna radiata (Menon and Srivastava 1984;Fariduddin 2002).…”

Section: Introductionmentioning

confidence: 90%

Does exogenous application of 24-epibrassinolide ameliorate salt induced growth inhibition in wheat (Triticum aestivum L.)?

2008

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A greenhouse experiment was conducted to assess whether exogenously applied 24-epibrassionlide (24-epiBL) could alleviate the adverse effects of salt on wheat. Two hexaploid wheat (Triticum aestivum L.) cultivars, S-24 (salt tolerant) and MH-97 (moderately salt sensitive), were grown under control (0 mM NaCl in full strength Hoagland's nutrient solution) or saline conditions (150 mM of NaCl in full strength Hoagland's nutrient solution). After 41 days growth of wheat plants under saline conditions, 24-epiBL was applied as a foliar spray. Four levels of BR were used as 0 (water spray), 0.0125, 0.025, and 0.0375 mg l -1 . Application of 24-epiBL increased plant biomass and leaf area per plant of both cultivars under non-saline conditions. However, under saline conditions, improvement in growth due to exogenous 24-epiBL was observed only in S-24. Photosynthetic rate was reduced due to salt stress in both cultivars, but this inhibitory effect was ameliorated significantly by the exogenous application of 24-epiBL. Exogenously applied 24-epiBL also enhanced the photosystem-II efficiency in both cultivars measured as F v /F m ratio. Although the activities of antioxidant enzymes, Superoxide dismutase (SOD), Peroxidase (POD) and Catalase (CAT) were increased due to salt stress in both wheat cultivars, exogenously applied 24-epiBL had a varying effect on the antioxidant system. The activity of SOD remained unaffected in both cultivars due to 24-epiBL application, but that of POD and CAT was promoted in the salt stressed plants of cv. S-24 only. In conclusion, improvement in growth in both wheat cultivars due to foliar applied 24-epiBL was found to be associated with 24-epiBL-induced enhancement in photosynthetic capacity. The 24-epiBL-induced regulation of antioxidant enzymes or growth under saline conditions was cultivar specific.

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“…This observation could be correlated with the finding of [37] who considered that BRs implicating in increasing the rate of dark co 2 fixation, reliable indication of the rate of cytoplamic malate synthesis via phosphoenol Pyru-vate (PEP) carboxylase, which BRs did not substantially affect peroxidase and phenol activities in many beans [38]. However [39] concluded that BRs enhancing the activation state of some enzymes. In this investigation results also showed that progesterone treatment at 10 ppm led to increase in the endogenous hormone IBA, cytokynine, whereas, the higher concentration applied at 20 and /or 30 ppm showed a promative effect on both GA and IAA.…”

Section: Discussionsupporting

confidence: 64%

Studies on the Effect of Gamma, Laser Irradiation and Progesterone Treatments on Gerbera Leaves

Metwally¹

2015

EJB

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Abstract:The present study, we aimed to evaluate the effect of progesterone (prog.) concentrations (10, 20 and 30 ppm), gamma rays (γ) doses (100,150 and 250 rad), helium neon laser rays (He-Ne) exposure time (1.0, 5.5 and 11.5 min.) and argon laser rays (Ar) exposure time (1.0, 7.5 and 15.5 min.) and some interaction treatments between progesterone and irradiation treatments on biochemical constituents i.e. growth regulators and some enzymes activity in gerbera leaves. For this reason, at the greenhouse of the National Research Centre, Dokki, Giza, Egypt. Pot experiments were carried out two successive seasons of 2006 and 2007, and growth regulators (IAA, GA 3 , Cytok. and ABA), some enzymes activity in gerbera leaves (POD, CAT, Alk. phosph and Acid. phosph) and protein content were determined. The results showed that, low conc. of progesterone hormone, low exposure time of argon and He-Ne laser has a great effect on increasing POD activities and Cytokine content. Gamma rays at 150 rad increased ABA, POD, CAT and Alkaline and acid phosphatase, while 250 rad increased IAA and GAlike substances. The least value of alkaline phosphatase activity was recorded by progesterone treatments.

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The Influence of Brassinosteroid, a Growth-promoting Steroidal Lactone, on Development and CO2-fixation Capacity of Intact Wheat and Mustard Seedlings

Cited by 8 publications

References 19 publications

Effect of Homobrassinolide Application on Metabolic Activity and Grain Yield of Wheat under Normal and Water‐Stress Condition

Effect of Homobrassinolide Application on Metabolic Activity and Grain Yield of Wheat under Normal and Water‐Stress Condition

Does exogenous application of 24-epibrassinolide ameliorate salt induced growth inhibition in wheat (Triticum aestivum L.)?

Studies on the Effect of Gamma, Laser Irradiation and Progesterone Treatments on Gerbera Leaves

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