24-epibrassinolide induced antioxidative defense system of Brassica juncea L. under Zn metal stress

Arora, Priya; Bhardwaj, Renu; Kanwar, Mukesh Kumar

doi:10.1007/s12298-010-0031-9

Cited by 44 publications

(20 citation statements)

References 43 publications

(36 reference statements)

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“…An increase in CAT activity after treatment with BR has also been reported earlier in rice [11], groundnut [37], Zea mays L. [10,38], tomato [39], Brassica juncea L. [40,41], and so forth. It may be inferred from the enhancement in CAT activity that BR application modulated the antioxidative metabolism resulting in better growth of plants as suggested earlier [42,43].…”

Section: Discussionsupporting

confidence: 76%

“…It may be inferred from the enhancement in CAT activity that BR application modulated the antioxidative metabolism resulting in better growth of plants as suggested earlier [42,43]. An increase in POX activity in response to the application of BRs has also been reported [40,41,44]. The POX has been implicated in the synthesis of lignin and other phenolic polymers.…”

Section: Discussionmentioning

confidence: 70%

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In VitroEffects of Brassinosteroids on the Growth and Antioxidant Enzyme Activities in Groundnut

2012

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This paper deals with the in vitro effects of brassinosteroids (BRs) on growth in the form of multiple shoots, chlorophyll content, Hill reaction activity (HRA), activities of catalase (CAT), peroxidase (POX), polyphenol oxidase (PPX), and ascorbate peroxidase (APX) in Arachis hypogaea L. genotypes (M-13 and PBS24030). In vitro impact of BR on shoot multiplication potential was found to be the best at 1 mL L −1 with BA (3 mg L −1 ) in both the cultivars. Flowering was observed in PBS24030 on the medium containing 2.0 mL L −1 BR with 3 mg L −1 BA. Rhizogenesis was noticed in the presence of BR alone. Total chlorophyll content and HRA were highest at 2.0 mL L −1 with BA in M-13 and 1.0 mL L −1 with BA in PBS24030. Antioxidant enzyme activities were increased in the presence of BR whether alone or in combination with BA in both the cultivars. However, progressive decline was observed in case of MDA content. The results obtained in the study clearly indicated not only the in vitro establishment of groundnut cultivars in the presence of BR alone and in combination with BA but also its effect on various growth promotory physiological parameters.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 70%

In VitroEffects of Brassinosteroids on the Growth and Antioxidant Enzyme Activities in Groundnut

2012

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“…Therefore, it is possible that plant brassinosteroids have sufficient affinity with the rat gluco-corticoid receptor protein to be connected to their signaling chain through the recognition of molecules expressed by the constitutive CaMV promoter inserted in the transformation construct. Brassinosteroids have been shown to induce tolerance to a wide range of abiotic stresses (Kagale et al, 2007;Bajguz, 2011;Sittayat et al, 2007;Arora et al, 2010a;Koh et al, 2007) through the activation of anti-oxidative stress systems (Arora et al, 2010b), as well as the enhanced synthesis of abscisic acid (Yuan et al, 2010), ethylene, salicylic acid (Divi et al, 2010), polyamines and indole-3-acetic acid (Choudhary et al, 2010(Choudhary et al, , 2011. Responses to stress in plants, moreover, are known to be activated by increased levels of auxins, which in turn determines feedback interaction with flavonoid synthetic patterns (Peer and Murphy, 2007;Lewis et al, 2011) and crosstalk with brassinosteroid transcription process (see Depuydt and Hardtke (2011) for an extensive review).…”

Section: Discussionmentioning

confidence: 99%

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Fuoco

Bogani

Capodaglio

et al. 2013

Journal of Plant Physiology

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a b s t r a c tRecently our findings have shown that the integration of the gene coding for the rat gluco-corticoid receptor (GR receptor) in Nicotiana langsdorffii plants induced morphophysiological effects in transgenic plants through the modification of their hormonal pattern. Phytohormones play a key role in plant responses to many different biotic and abiotic stresses since a modified hormonal profile up-regulates the activation of secondary metabolites involved in the response to stress. In this work transgenic GR plants and isogenic wild type genotypes were exposed to metal stress by treating them with 30 ppm cadmium(II) or 50 ppm chromium(VI). Hormonal patterns along with changes in key response related metabolites were then monitored and compared. Heavy metal up-take was found to be lower in the GR plants. The transgenic plants exhibited higher values of S-abscisic acid (S-ABA) and 3-indole acetic acid (IAA), salicylic acid and total polyphenols, chlorogenic acid and antiradical activity, compared to the untransformed wild type plants. Both Cd and Cr treatments led to an increase in hormone concentrations and secondary metabolites only in wild type plants. Analysis of the results suggests that the stress responses due to changes in the plant's hormonal system may derive from the interaction between the GR receptor and phytosteroids, which are known to play a key role in plant physiology and development.

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“…These adverse conditions increase the formation of reactive oxygen species (ROS) such as H 2 O 2 (hydrogen peroxide), O 2 -(superoxide) and OH (hydroxyl) radicals, through enhanced leakage of electrons to molecular oxygen (Arora et al 2002). ROS can act as second messengers involved in the stress signal transduction pathway (Chamnongpol et al 1998), but excessive ROS production can cause oxidative stress, which damages plants by oxidizing photosynthetic pigments, membrane lipids, proteins and nucleic acids (Yordanov et al 2000).…”

mentioning

confidence: 99%

Antioxidant enzymes changes in response to drought stress in ten cultivars of oilseed rape (Brassica napus L.)

Abedi¹,

Pakniyat²

2010

Czech J. Genet. Plant Breed.

283

116

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Abstract:The study was undertaken to identify the responses of antioxidant enzyme activities and their isozyme patterns in seedlings of 10 oilseed rape (Brassica napus L.) cultivars under drought stress conditions. Plants were grown under three irrigation regimes (FC; field capacity, 60% FC and 30% FC) in a greenhouse. Drought stress preferentially enhanced the activities of superoxide dismutase (SOD) and guaiacol peroxidase (POD) whereas it decreased catalase (CAT) activity. Licord with the highest level of enzyme activity under both optimum and limited irrigation regimes is reported as the most tolerant cultivar. Whereas Hyola 308 and Okapy, having the lowest enzymes activities, are mentioned as cultivars sensitive to drought stress. The native polyacrylamide gel electrophoresis (PAGE) analysis detected eight SOD isozymes. Oilseed rape leaves contained three isoforms of Mn-SOD and five isoforms of Cu/Zn-SOD. The expression of Mn-SOD was preferentially enhanced by drought stress. Five POD isoforms were detected in oilseed rape leaves. The intensities of POD-4 and -5 were enhanced under drought stress. According to the results, the appearance of new isozyme bands under drought stress conditions may be used as a biochemical marker to differentiate drought tolerant cultivars under drought stress.

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24-epibrassinolide induced antioxidative defense system of Brassica juncea L. under Zn metal stress

Cited by 44 publications

References 43 publications

In VitroEffects of Brassinosteroids on the Growth and Antioxidant Enzyme Activities in Groundnut

In VitroEffects of Brassinosteroids on the Growth and Antioxidant Enzyme Activities in Groundnut

Response to metal stress of Nicotiana langsdorffii plants wild-type and transgenic for the rat glucocorticoid receptor gene

Antioxidant enzymes changes in response to drought stress in ten cultivars of oilseed rape (Brassica napus L.)

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