Study of photosynthesis process in the presence of low concentrations of clomazone herbicide in tobacco (Nicotiana tabacum)
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2013, Vol 9, Issue 1
Abstract
The effect of chemical residues of clomazone on photosynthetic processes has been studiedby using several low concentrations of the herbicide (0, 1, 0.1, 0.01, 0.001, 0.0001 and 0.00001) µM and seedlings of two varieties of tobacco (Nicotiana tabacum L. cv. Virginie vk51, Nicotiana tabacum, L. cv. Xanthi). The content of photosynthetic pigments, the parameters of the chlorophyll-a fluorescence and the JIP-test were performed on an adult leaf (AL) and a young leaf (YL), that gave a complementary designto know the action's mode of clomazone on the plant physiological processes. Clomazone reducedthe total chlorophyll (a+b), carotenoids pigments (reduction in size antenna pigments judged by an increase in the chlorophyll a/b ratio) in young leaves more than adults leaves. The maximal photochemical efficiency (Fv/Fm) of photosystem II (PSII) decreased significantly in youngleavescompared to adult leaves and in (Virginie) variety than (Xanthi) variety. Among the parameters calculated of the JIP-test most affected by the treatment, PIabs, 1-VJ, ABS/RC, DI0/RC, TR0/RC, ET0/RC, ET0/ABS, which indicated acomparable effects of clomazone(1μM, 0.1µM, 0.01µM) between the two types of leaves and the varieties used. More, the results showed that the concentration ( 1μM) was the most effective amongthe other low concentrations used and the (Virginie) variety ismore sensitive than the (Xanthi)variety. We conclude that clomazone has probably two combined functions (physiological, toxic) judged by the different behavior of both types of leaves in the presence of the herbicide.
Authors and Affiliations
Majd Darwish, Felicie Lopez-Lauri, Huguette Sallanon
Implications of Plants Genetic Transformation Assessed by Geneticist, Biochemist and Physiologist
Transgenic plants creation methodology developed for several decades has gained significant advances. However, problems of unanticipated effects of transgenosis, stability of GMO characteristics and establishing criteria...
Glycosylated Hemoglobin: The Importance in Management of Type 2 Diabetes
Type 2 diabetes is a major public health problem with high and increasing prevalence, morbidity and mortality. The association between diabetes and microvascular and macrovascular complications is well known besides, tig...
Serum Antioxidant Status to Assess Oxidative Stress in Brucella Infected Buffaloes
The investigation was carried out to assess oxidative stress on the basis of serum antioxidant status in the buffaloes of Murrah breed having brucellosis. For this serum antioxidants like vitamin A, vitamin C, vitamin E...
Diurnal Influence on Phenol Compound Dynamic into Leaves of Medicinal Plants
Content of phenol compound in leaves of [i]Alchemilla subcrenata[/i], [i]Achillea asiatica[/i], [i]Taraxacum officinale[/i], [i]Veronica chamaedrys[/i] was researched. The dynamics of alteration of phenol compound conten...
Influence of NaCl salinity on growth analysis of strawberry cv. Camarosa
In order to study of salinity effect on growth analysis of strawberry, a greenhouse experiment was conducted in Vali-e-Asr University of Rafsanjan in 2010. This study was carried out RCBD design with 4 replications to de...