scholarly journals The Cotton GhWRKY91 Transcription Factor Mediates Leaf Senescence and Responses to Drought Stress in Transgenic Arabidopsis thaliana

2019 ◽  
Vol 10 ◽  
Author(s):  
Lijiao Gu ◽  
Qiang Ma ◽  
Chi Zhang ◽  
Congcong Wang ◽  
Hengling Wei ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factor ◽  
Drought Stress ◽  
Leaf Senescence ◽  
Transgenic Arabidopsis ◽  
Transgenic Arabidopsis Thaliana

CaLEA 73 gene from Capsicum annuum L. enhances drought and osmotic tolerance modulating transpiration rate in transgenic Arabidopsis thaliana

2015 ◽  
Vol 95 (2) ◽  
pp. 227-235 ◽  
Author(s):  
Gerardo Acosta-García ◽  
Angela M. Chapa-Oliver ◽  
Jesus R. Millán-Almaraz ◽  
Ramón G. Guevara-González ◽  
Elvira Cortez-Baheza ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Salt Stress ◽  
Drought Stress ◽  
Transgenic Plants ◽  
Capsicum Annuum ◽  
Transpiration Rate ◽  
Transgenic Arabidopsis ◽  
Transgenic Arabidopsis Thaliana ◽  
Osmotic Tolerance ◽  
Transgenic Lines

Acosta-García, G., Chapa-Oliver, A. M., Millán-Almaraz, J. R., Guevara-González, R. G., Cortez-Baheza, E., Rangel-Cano, R. M., Ramírez-Pimentel, J. G., Cruz-Hernandez, A., Gueara-Olvera, L., Aguilera-Bibian, J. E., Hernández-Salazar, M. and Torres-Pacheco, I. 2015. CaLEA 73 gene from Capsicum annuum L. enhances drought and osmotic tolerance modulating transpiration rate in transgenic Arabidopsis thaliana. Can. J. Plant Sci. 95: 227–235. Late embryogenesis abundant (LEA) proteins are an important group of proteins related to the protection of several kinds of abiotic stresses in plants. A LEA gene was cloned from Capsicum annuum seeds and named CaLEA73. This gene was expressed in C. annuum plants during several phenological stages as well as in cold stress and exogen ABA applications. The CaLEA73 gene was ectopically expressed in transgenic Arabidopsis thaliana plants in order to analyse its role under drought and salt stress. Our results displayed an increase in tolerance to drought and osmotic, but not under salt stress in the transgenic lines evaluated. Interestingly, proline levels in transgenic lines were not higher than azygous control plants, when the drought stress was evaluated. Transpiration levels in transgenic plants were lower than control, suggesting an improvement in water efficiency use in CaLEA73 transgenic lines. The stomatal density and index were significantly minor in transgenic plants in comparison to azygous control, likely indicating a reason of the minor transpiration in transgenic plants. Our results are discussed in the context of drought stress physiology aspects for crop improvement.

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