Physiological and biochemical responses of two maize cultivars (Corralejo and Tlaltizapon) under salt stress
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2014, Vol 10, Issue 3
Abstract
The aim of the present work was to study the effect of different concentrations of NaCl (0, 50 and 100mM) in two cultivars of maize (Corralejo and Tlaltizapan), on their nutritional and photosynthetic comportment. The measures focused on the physiological parameters (growth weight, hydration and nutritional status of plants) and biochemical (chlorophyll, PEPC activity, activity of some anti-oxidant enzymes and lipid peroxidation). Analysis of morphological parameters showed a yellowing of the extremity of leaves, at 100 mM of NaCl. These visual symptoms are associated with a decrease of chlorophyll. A decrease in potential growth was found in two cultivars, but less significant in Corralejo. The best salt tolerance of the latter was due to a better hydration of the leaves, to a lesser accumulation of Na+ and Cl- in its leaves and a better selectivity K/Na. To identify the biochemical characteristics associated with the physiological behavior, we conducted measures activity of PEPC, the protein, catalase and peroxidase on the fourth leaf from the bottom. A negative correlation between the activity of PEPC and Na+ amount was found at 50 mM in the sensitive cultivar and at 100 mM of NaCl in tolerant cultivar Corralejo. Furthermore, the antioxidant response was marked by a greater accumulation of malondialdehyde, in Tlaltizapan at 100 mM of NaCl. At the same concentration, catalase peroxidase and SOD activities weren't decreased in this cultivar. This suggests that salt has created a stress oxidative state only in Tlaltizapan leaves. These results showed a better performance of Corralejo cultivar compared to Tlaltizapan cultivar, at 50 and 100 mM of NaCl.
Authors and Affiliations
T. Amdouni, S. Mrah, N. Msilini, M. Zaghdoud, Z. Ouerghiabidi
Keywords
Related Articles
- EP ID EP162939
- DOI -
- Views 111
- Downloads 0
24-epibrassinolide enhances flower and fruit production of pepper (Capsicum annuum L.) under salt stress
Among various environmental stresses, salt stress is extensively damaging to crops production in many areas of the world. The enhancement of plant tolerance is important for plant productivity. Brassinosteroids plays an...
Characterization of Maize Superoxide Dismutase Gene Family: Identification of Two Novel Transcripts of Chloroplast SODs and Analysis of Potential DNA-protective Function of Mitochondrial MnSOD
The families of genes encoding such key antioxidant enzymes as superoxide dismutases usually have complex structure. They consist of genes encoding enzymes which differ by their metal cofactor, origin and su...
Growth and Yield Quality Parameter of Phyllanthus Amarus as Affected by Moisture and Temperature Stress factors
This work investigates the influence of moisture and temperature stress on plant phenological parameters of Phyllanthus amarus plant. A pot experiment was conducted under controlled water stress environment in greenhouse...
TRANSGENIC PLANTS OF RAPE (BRASSICA NAPUS L.) WITH GENE OSMYB4 HAVE INCREASED RESISTANCE TO SALTS OF HEAVY METALS
Growth, Carbon Isotope Discrimination and Nitrogen Uptake in Silicon and/or Potassium Fed barley Grown under Two Watering Regimes
The present pot experiment was an attempt to monitor the beneficial effects of silicon (Si) and/or potassium (K) applications on growth and nitrogen uptake in barley plants grown under water (FC1) and non water (FC2) str...