Wheat Antioxidants Changes and Grain Yield Variation under Drought Stress
Journal Title: Annual Research & Review in Biology - Year 2015, Vol 8, Issue 1
Abstract
Antioxidants provide a defense line against adverse effects of free radicals released in plant cells under drought stress. Accumulation of antioxidants may link with higher grain yield in environmental stress conditions. The aim of this study was to evaluate antioxidants accumulation under drought stress and their relationship with grain yield variation. Reactions of 100 wheat landrace varieties and two commercial cultivars (Shiraz and Bezostaya) to drought stress were tested by two treatments’ including normally irrigation regime throughout the growth cycle and stopped irrigation from heading stage as drought stress in 2010-2011. Results indicated that drought stress triggers plant reactions via accumulation of proline as non-enzymatic and catalase and peroxidase as enzymatic-antioxidants. Correlation analysis showed that grain yield increases when antioxidants increase and proline was more responsive than other antioxidants in plants dealing with water deficit stress after heading. Genotypes had different reactions to drought stress and categorized in susceptible and tolerant groups. KC4144, KC4641, KC4779, KC3885, KC4529, KC4863, KC4907, KC4528, KC4511 and KC4840 had higher enzymatic activities. These genotypes that had highest grain yield in both irrigation and drought stress conditions can be used as parental lines in construction of mapping populations in order to locate QTLs responsible for drought tolerance. Therefore, categorizing studied genotypes as drought- tolerant and susceptible would help a better programming of breeding for higher grain yield and stability under low-income environments.
Authors and Affiliations
Bahram Heidari, Zahed Khaledian, Ali Dadkhodaie
Keywords
Related Articles
- EP ID EP353546
- DOI 10.9734/ARRB/2015/18751
- Views 94
- Downloads 0
Phytoplankton Community Response to Seasonal Changes in Chlorophyll a and Nitrate-Phosphate Concentrations in a Tidal Blackwater River in Niger Delta
The study evaluated the seasonal abundance of standing stock of phytoplankton groups in a tidal blackwater system of the New Calabar River in Nigeria. The focus was on observable patterns in phytoplankton community struc...
Case Report and Review of Glandular Odontogenic Cyst in Anterior Maxilla- A Histopathologic Perspective
Glandular odontogenic cyst is a rare odontogenic jaw cyst which exhibits a locally aggressive behaviour with high recurrence rate. It is a relatively new entity that was first described in 1987. Because of the paucity of...
Therapeutic Management of Benign Prostatic Hyperplasia: From Synthetics to Naturals
Benign prostatic hyperplasia (BPH) is a common urological disorder of men with multi-factorial etiology, particularly affecting the lifestyle of elderly patients. Sex steroid hormones essential for the development and gr...
Taxonomy of Earthworm Species Collected from East Coast of Guyana
Earthworms contribute significantly towards the proper functioning of our ecosystem and are environmentally and economically beneficial to the well-being of other organisms. These soil dwelling organisms serve to enhance...
Molecular Typing of Campylobacter Species Isolated from Healthy Indigenous Chickens in Grenada
Aim: To identify the sequence types (STs) of Campylobacter from indigenous chickens in Grenada and compare the results to other animals in Grenada and other countries from previous published studies. Study Design: Therm...