TY  - SER
AU  - Ferreira, Adriana dos Santos 
AU  - Leal, Caio César Pereira
AU  - Leite, Moadir de Sousa
AU  - Benedito, Clarisse Pereira
AU  - Dutra, Alek Sandro
AU  - Alves, Charline Zaratin
AU  - Morais, Elis Regina Costa de
AU  - Pereira,  Márcio Dias
AU  - Porceddu, , Marco
AU  - Bacchetta, Gianluigi
AU  - Torres, Salvador Barros
TI  - Morphophysiological and biochemical changes in Enterolobium contortisiliquum seedlings under abiotic stresses
KW  - ESSÊNCIA FLORESTAL
KW  - TIMBAÚVA
KW  - ÁRVORE ANGIOSPERMA
KW  - DEFICIÊNCIA HÍDRICA
KW  - SALINIDADE
KW  - BIOQUÍMICA VEGETAL
KW  - MORFOLOGIA VEGETAL
N1  - Publicação online; 29 ref.; 6 illus.; Summary (En)
N2  - 

ABSTRACT - Among the main problems that compromise the development of forest species are water and salt stresses, especially in the early stages of development, when seedlings are more sensitive. Thus, the objective of this study was to evaluate the morphophysiological and biochemical changes in Enterolobium contortisiliquum seedlings subjected to abiotic stresses. The experimental design was randomized complete blocks (RCB), composed of fi ve treatments, with four replicates, and the experimental plot consisted of twenty plants. From the 31st day after sowing, when the seedlings reached approximately 15 cm in height, they began to receive the treatments, which consisted of different levels of electrical conductivity of irrigation water (0.3; 2; 4; 6; 8 dS m-1) for salt stress and periods of water restriction (0; 4; 8; 12 and 16 days without irrigation) for water stress. The traits evaluated were: plant height, root length, stem diameter, number of leaves, leaf area, total dry matter, Dickson quality index, height/shoot dry matter ratio, total soluble sugars, starch, total amino acids and proline. An increase in the electrical conductivity of irrigation water and days without irrigation compromised the development of E. contortisiliquum seedlings, which was intensified from 2 dS m-1 and four days without irrigation for salt and water stresses, respectively. The mechanism of survival of E. contortisiliquum to abiotic stresses involves reduction in the growth and quality of seedlings, with activation of biochemical defense mechanisms of the species. 


Key words: Fabaceae. Dry forests. Semi-arid region. Salinity. Hydrical stress
UR  - https://www.scielo.br/j/rca/a/PgcFs6mKMJvKGCXPKpqcsGc/?format=pdf&lang=en
ER  -