Data/hora: 11/06/2024 10:48:49

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 11/08/2021
Data da última atualização: | 16/09/2021
Autoria: | FREITAS, J. C. E.; RESENDE, C. F. de; PACHECO, V. S.; GRAZUL, R. M.; MORAIS, L. E.; PASSOS, L. P.; PEIXOTO, P. H.
Afiliação: | JOBER CONDÉ EVANGELISTA FREITAS, Universidade Federal de Juiz de Fora; CRISTIANO FERRARA DE RESENDE, Universidade Federal de Juiz de Fora; VINÍCIUS SACRAMENTO PACHECO, Universidade Federal de Juiz de Fora; RICHARD MICHAEL GRAZUL, Universidade Federal de Juiz de Fora; LEANDRO ELIAS MORAIS, Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais; LEONIDAS PAIXAO PASSOS, CNPGL; PAULO HENRIQUE PEREIRA PEIXOTO, Universidade Federal de Juiz de Fora.
Título: | Does the water regime differentially modulate the responses to water stress in Lippia alba (Verbenaceae) genotypes with different ploidy levels?
Ano de publicação: | 2021
Fonte/Imprenta: | Industrial Crops and Products, v. 160, 113137, 2021.
DOI: | https://doi.org/10.1016/j.indcrop.2020.113137
Idioma: | Inglês
Conteúdo: | Lippia alba (Mill.) NE Br. ex Britton & P. Wilson is an important medicinal herb widely distributed in Latin America. However, the success of this crop depends on several biotic and abiotic environmental factors, being water availability the most limiting one. Therefore, the present paper aimed to investigate the responses of one tetraploid (tet) and two diploids (dip1 and dip2) genotypes of L. alba to drought stress by using irrigation suspension under 0 (control) or 15 (stressful factor) days. The physiological parameters water content, gas exchange, chlorophyll a fluorescence, photosynthetic pigments contents, and the qualitative profile of volatile organic compounds were evaluated by uni- and multivariate statistical analyses. Drought stress negatively affected the physiological processes in all L. alba specimens equally, regardless of the genotype. It was observed that photosynthesis was impaired due to stomatal limitation, which was triggered by low water availability. In contrast, the qualitative profile of volatile organic compounds was strongly determined by genotype without drought stress influence. Furthermore, gas exchange and chlorophyll a fluorescence were the most sensitive parameters to evaluate drought stress in L. alba. More specifically stomatal conductance is recommended to be evaluated in L. alba breeding programs focused on drought stress tolerance, given that its high contribution to photosynthesis regulation.
Palavras-Chave: | Estresse hídrico.
Thesagro: | Deficiência Hídrica; Erva Cidreira; Fotossíntese; Planta Medicinal.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (25184-1) - UPC - AP - DD -  -  -  - DIS