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BioMed Research International
Volume 2018, Article ID 1605096, 14 pages
https://doi.org/10.1155/2018/1605096
Research Article

Seed Antioxidants Interplay with Drought Stress Tolerance Indices in Chilli (Capsicum annuum L) Seedlings

1Department of Biotechnology, K L (Deemed to be University), Green Fields, Vaddeswaram, Guntur, Andhra Pradesh 522 502, India
2Professor Jaya Shankar Telangana State Agricultural University, Rajendranagar, Hyderabad, India

Correspondence should be addressed to M. S. R. Krishna; moc.liamg@18anhsirkrsm

Received 14 October 2017; Revised 14 March 2018; Accepted 1 April 2018; Published 15 May 2018

Academic Editor: Leonel Rojo

Copyright © 2018 U. Lakshmi Sahitya et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Altering climatic conditions and water stress drastically affects the chilli crop yield. In this scenario we adapted a strategic approach for screening of elite chilli genotypes, by exploring role of seed antioxidants in stress tolerance during vegetative phase. A total of 20 chilli genotypes’ seed antioxidant potential and its effect on water stress tolerance were studied at three water regimes, namely, control (100% Field Capacity), moderate (80% Field Capacity), and severe (60% Field Capacity) stress conditions. Drought tolerance traits relative water content, chlorophyll content, and activities of superoxide dismutase and catalase enzymes were measured. A strong correlation was observed between seed antioxidants and water stress tolerant traits in seedlings. Genotypes KCa-5, KCa-6, and KCa-10 showed low quantity of H2O2 and Malondialdehyde in seeds and maintained high membrane integrity and chlorophyll content in seedlings. High content of proline in KCa-5, KCa-7, and KCa-10 seeds retained high relative water content at seedling stage under severe water stress. Present work reveals genotypic differences of hot pepper to different water regimes. Based on Principal Component Analysis (PCA) of seed antioxidant variables and drought tolerance indices twenty genotypes segregated into three clusters, namely, drought tolerant and susceptible and moderately tolerant.