Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Rodrigues, Caroline Marques; Alves, Edna Ursulino; Silva, Rosemere dos Santos; Cruz, Flávio Ricardo da Silva; Silva, Maria Lúcia Maurício da; Ursulino, Marina Matias; Santos, Erifranklin Nascimento; Moura, Mácio Farias de

doi:10.5539/jas.v12n7p66

Cited by 1 publication

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, the seeds of Caesalpinia echinata Lam. germinated until the osmotic potential of 0.4 MPa (Rodrigues et al, 2020). Both germination and seed vigor of Handroanthus impetiginosus (Mart.…”

Section: Figure 1 -Germination Speed Index (A) and Germination Percen...mentioning

confidence: 99%

Initial establishment of Erythrina velutina Willd seedlings under water deficit: physiological and biochemical aspects

Almeida,

Silva,

Gonçalves

et al. 2023

Rev. Bras. Ciênc. Ambient.

Self Cite

View full text Add to dashboard Cite

For plant species to establish and survive in semiarid regions, such as the Caatinga plant domain, they need to present biochemical versatility. Thus, the objective of this study was to evaluate through physiological and biochemical indicators the sensitivity of seeds and seedlings of Erythrina velutina Willd to water deficit, as this species is used in the recovery of degraded areas in the Brazilian semiarid region. The seeds were submitted to five osmotic potentials (-0.1; -0.2; -0.3; -0.4; and -0.5 MPa), evaluating the percentage of germination (normal seedlings), germination speed index, length of aerial parts and root system, total dry mass, the concentration of photosynthetic pigments (chlorophylls a, b, and carotenoids) in aerial parts and root system, soluble carbohydrates and proteins, proline, and the enzymes ascorbate peroxidase, catalase, superoxide dismutase, peroxidase, and polyphenoloxidase. The water deficit reduced the germination speed index and percentage, aerial parts and root length, aerial parts and root dry mass, and photosynthetic pigment content in seedlings; however, there was an increase in the levels of total carbohydrate, proline, and protein, and a reduction in superoxide dismutase. The water potential from -0,4 MPa was a limiting factor for the seedling and/or seedling formation process. The direct sowing of E. velutina would only be indicated up to the potential of -0,3 MPa for the regeneration of degraded areas in semiarid regions. The species in the seedling formation stage present less biochemical plasticity to overcome limiting conditions of water availability.

show abstract

Section: Figure 1 -Germination Speed Index (A) and Germination Percen...mentioning

confidence: 99%