Kaim, A.S. and Kaur, I. and Bhatnagar, A.K. (2016) Impact of 24-Epibrassinolide on tolerance, accumulation, growth, photosynthesis, and biochemical parameters in Arsenic Stressed Cicer arietinum L. Agricultural Science Research Journal, 6 (9). pp. 201-212.
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Abstract
Cicer arietinum (chickpea) plants were raised on soils spiked with As ranging from 0-200 (0, 30, 50 70, 100, 130, 170 and 200) mg As Kgˉ¹ soil grown under pot culture experiment. This series was named as As series and another series was maintained where a narrow spectrum of dosage As (0-70 mg Kgˉ¹soil) was given to plants that was supplemented with 10ˉ⁸M 24-Epibrassinolide (24-EBL), as hormone series. Plant height, root length, dry biomass and flowering in As series reduced significantly (p<0.05) when compared to control whereas hormone supplementation was able to ameliorate the toxic effect of As on growth and reproductive parameters. Increase in As concentration reduces the chlorophyll and carotenoid content significantly (p<0.01) while treatment with hormone enhances these parameters. Photosynthetic rate was found to decrease in intact plants by 49.3-94.2% in As series treatments as compared to control, while hormone series showed an increase of 20.1-360.9% as compared to their corresponding As series. Leghaemoglobin content and nitrogenase activity reduced significantly (p<0.01 and 0.05 respectively) in As series while these parameters increased for treatments of hormone series. Tolerance index (%) for Cicer reduced to 82% at As70 and was 45.5% at As200 while EBL supplementation increased it to 98.6 % at As70 +EBL, equivalent to the control i.e. 100%. It was observed that 24-EBL lowered the metal(loid) accumulation in plants, also in all treatments the mean As accumulation was higher in roots as compared to shoots. The use of a new generation phytohormone – brassinosteroids can be one of the agronomic measures to combat the toxic effect of As.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Arsenic, Brassinosteroids, Photosynthetic rate, Tolerance |
| Author Affiliation: | S.G.T.B. Khalsa College, Department of Botany, University of Delhi, Delhi-110007 |
| Subjects: | Plant Protection |
| Divisions: | Chickpea |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 03 Feb 2017 04:21 |
| Last Modified: | 03 Feb 2017 04:21 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/14703 |
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