Evaluating stress responses in cowpea under drought stress
Data
2019-06-14
Autores
Castro, Isaura Alberta Oliveira De
Pereira, José Manuel Moutinho
Correia, Carlos Manuel
Matos, Maria Manuela Do Outeiro Correia De
Rosa, Eduardo Augusto Dos Santos
Carnide, Valdemar Pedrosa
Título da revista
ISSN da revista
Título do Volume
Editora
Elsevier
Resumo
Drought impact on plants is an increasing concern under the climate change scenario. Cowpea (Vigna unguiculata L. Walp.) is considered as one of the most tolerant legume crops to drought, being the search for the best well adapted genotypes crucial to face the future challenges. Different approaches have been used for differentiating plant responses to drought stress. Plants of four cowpea genotypes were submitted to three watering regimens (a severe and moderate drought stress, and well-watered control) during 15 days, and several physiological, biochemical and molecular parameters were evaluated. Stressed plants revealed commonly-described drought stress characteristics, but not all assayed parameters were useful for discriminating plants with different drought severities or genotypes. The analyses which have contributed most to genotype discrimination were those related with stomatal function, and biochemical markers such as proline and anthocyanin contents. Antioxidant enzymes activities and related genes expression did not differed among genotypes or upon drought stress treatments, suggesting that scavenging enzymes are not involved in the differential ability of cowpea plants to survive under drought stress. This information will be useful to evaluate and use genetic resources, as well as design strategies for breeding cowpea resistance to drought stress.
Descrição
Palavras-chave
Biochemical and molecular markers , Genotype discrimination , Physiological parameters , Vigna unguiculata L. Walp. , Drought stress
Citação
Márcia Carvalho, Isaura Castro, José Moutinho-Pereira, Carlos Correia, Marcos Egea-Costines, Manuela Matos, Eduardo Rosa, Valdemar Carnide, Teresa Lino-Neto (2019). Evaluating stress responses in cowpea under drought stress. Journal of Plant Physiology 241: 153001.