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Effect of 28-homobrassinolide treatment on nickel toxicity in Brassica juncea

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Photosynthetica

Abstract

Plants of Brassica juncea L. cv. T-59 were supplied with 50 or 100 µM nickel (Ni50, Ni100) at 10 d after sowing (DAS), and sprayed with 28-homobrassinolide (HBR) at 20 DAS. The plants treated with Ni alone exhibited reduced growth, net photosynthetic rate, content of chlorophyll, and the activities of nitrate reductase (E.C.1.6.6.1) and carbonic anhydrase (E.C. 4.2.1.1) at observed 40 DAS, whereas, the contents of peroxidase (PER), catalase (CAT), and proline were increased. However, the spray of HBR partially neutralized the toxic effect of Ni on most of the parameters. Moreover, the treatment of HBR in association with either of the Ni concentration boosted the contents of PER and CAT in leaves and that of proline both in leaves and roots.

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Abbreviations

BR:

brassicines

CA:

carbonic anhydrase

CAT:

catalase

DAS:

d after sowing

DM:

dry mass

FM:

fresh mass

HBR:

28-homobrassinolide

NR:

nitrate reductase

P N :

net photosynthetic rate

PER:

peroxidase

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Authors and Affiliations

  1. Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India

    M. Masidur Alam, S. Hayat, B. Ali & A. Ahmad

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  1. M. Masidur Alam
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  2. S. Hayat
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  3. B. Ali
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  4. A. Ahmad
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Masidur Alam, M., Hayat, S., Ali, B. et al. Effect of 28-homobrassinolide treatment on nickel toxicity in Brassica juncea . Photosynthetica 45, 139–142 (2007). https://doi.org/10.1007/s11099-007-0022-4

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  • DOI: https://doi.org/10.1007/s11099-007-0022-4

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