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Plants experience different abiotic stresses under natural conditions   including salinity, water deficit, low temperature and high light. Once   plants are exposed to these stresses they might have a variety of responses   physiologically and biochemically. In this study, we test this hypothesis in   wild type Col-0 and vte4 mutant of Arabidopsis thaliana by measuring major   secondary metabolites alongside with total chlorophyll content under   different abiotic stresses namely salt stress, water stress and prolonged   water deficiency. These stresses were imposed to the plants in separate   experiments in which each treatment was replicated three times in a complete   randomized design with factorial arrangement. It was concluded that under all   abiotic stresses wild type Col-0 Arabidopsis plants showed stronger   performance in terms of all major metabolites compared to vte4 mutant.   α-tocopherol deficiency in vte4 mutant plants led to lower accumulation of   proline, total protein and total amino acids as well as starch and total   sugars in comparison with wild type A. thaliana. Furthermore, all five   secondary metabolites obtained the highest value under 100mM NaCl   concentration (Salt stress), under 50% of field capacity (water stress) and   under 8 days of water withholding (prolonged water deficiency). Wild type   Col-0 resulted in higher level of total chlorophyll content under all abiotic   stresses compared to mutant plants. Therefore, our results suggested that the   loss of α-tocopherol in vte4 mutant A.thaliana under different abiotic   stresses affected the efficiency and the stability of central metabolism and   photosynthetic apparatus

genetika

Analysis of secondary metabolism and total chlorophyll content provides new insights into the role of A-tocopherol for wild type and VTE4 mutant Arabidopsis thaliana under different abiotic stresses