Differential Responses of Two Lactuca sativa Varieties to Bicarbonate-Induced Iron Deficiency
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2013, Vol 9, Issue 4
Abstract
Iron chlorosis induced by bicarbonate is very common in calcareous soils, where bicarbonate (HCO[sub]3[/sub][sup]-[/sup]) ions are present at high concentrations. In this study, morpho-physiological and biochemical responses of two Lactuca sativa varieties (Romaine and Vista) to bicarbonate induced iron deficiency were investigated. The culture was conducted on nutrient solution containing 5 µM Fe and 10 mM NaHCO[sub]3[/sub], in a growth chamber with controlled conditions. After 14 days of bicarbonate treatment, the two varieties seedling showed a slight yellowing of young leaves associated with a significant decline of plant biomass, leaf number and area. Furthermore, the concentrations of the nutrient elements (potassium, magnesium, iron and calcium) in leaves and roots of two lettuce varieties were modified. In roots of bicarbonate treated plants, the Fe-chelate reductase activity was increased as compared to control in both varieties. PEPC activity was enhanced only in Vista variety. Moreover, Fe deficiency induced a small change in the photosynthetic parameters and chlorophyll fluorescence, especially in Romaine variety. These changes are accompanied by decreases in ribulose 1.5-bisphosphate carboxylase/oxygenase (Rubisco) activity. These findings indicated that Vista variety could survive at low iron supply.
Authors and Affiliations
Mohamed Chebbi, Najoua Msilini, Thouraya Amdouni, Zeineb Ouerghi
Keywords
Related Articles
- EP ID EP146728
- DOI -
- Views 145
- Downloads 0
Antioxidative responses and expression of insecticidal proteins in Bt cotton under high irradiance
Effect of high irradiance (HI) on the activity of antioxidant enzymes, rate of lipid peroxidation and hydrogen peroxide accumulation were investigated in non Bt and Bt cotton. The accumulation of malondialdehyde (MDA) an...
Effects of Light Intensity on Development and Chlorophyll Content in the Arabidopsis Mutant Plants with Defects in Photosynthesis
The developmental stages and adaptability to different light intensity (150 µmol*m-2*s-1 and 100 µmol*m-2*s-1) in Arabidopsis mutant lines with defects of photosynthetic apparatus were analyzed. Plant development in the...
BACOPA MONNIERI (L.) PENNELL –A GOOD BIOMARKER OF WATER POLLUTION/CONTAMINATION
Effect of water pollution on Bacopa monnieri was studied by culturing their rooted propagules in various polluted water samples and Hoagland nutrient medium artificially contaminated with different micro-level concentrat...
28-Homobrassinolide Modulate Antenna Complexes and Carbon Skeleton of Brassica juncea L. under Temperature Stress
The aim of present study was to explore the ameliorative impact of 28-homoBL on morpho-physiological attributes, photosynthetic pigments and sugars of [i]Brassica juncea[/i] L. exposed to oxidative stress caused by extre...
BIOLOGICAL FUNCTION OF TOMBUSVIRUS-ENCODED SUPPRESSOR OF RNA SILENCING IN PLANTS