Growth and development of salinity-exposed rice (Oryza sativa) rhizo-inoculated with Bacillus subtilis under different pH levels

Igiebor, Francis Aibuedefe; Ikhajiagbe, Beckley; Anoliefo, Geoffrey O.

doi:10.24193/subbbiol.2019.2.04

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding the content of chlorophyll b ( Figure 3B), plants irrigated with 2.4 dS m -1 and sprayed with 20 µM H 2 O 2 presented a higher content of chlorophyll b (394.27 mg g -1 FM) compared to the control treatment (0 µM). It was also observed that, at the highest salinity level (4.0 dS m -1 ), hydrogen peroxide was efficient in mitigating the damage of salinity on the content of chlorophyll b since H 2 O 2 may have affected the increase of the chlorophyllase enzyme, which is responsible for the degradation of molecules of photosynthetic pigments when the plant is exposed to water salinity (Igiebor, Ikhajiagbe, & Anoliefo, 2019). Furthermore, the lower pigment degradation induced by hydrogen peroxide may be related to its potential for stimulating the activity of antioxidant enzymes (Ashraf et al, 2015).…”

Section: According Tomentioning

confidence: 99%

Physiological changes and growth of soursop plants under irrigation with saline water and H2O2 in post-grafting phase

Veloso¹,

Lima²,

Azevedo³

et al. 2020

Semina: Ciênc. Agrár.

View full text Add to dashboard Cite

The low availability of water associated with high salt concentrations in irrigation water has become one of the leading challenges for agricultural production in the semiarid region of Northeastern Brazil. Thus, the study of strategies to enable the use of saline water in agriculture is essential. From this perspective, this study aimed to evaluate alterations in gas exchange, chloroplast pigments, and cell damage in soursop (Anonna muricata L.) irrigated with saline water and under exogenous application of hydrogen peroxide (H2O2) in the post-grafting phase. A study was conducted in Campina Grande, PB, under greenhouse conditions. The treatments were distributed in a randomized block design, in a 4 × 2 factorial arrangement, consisting of four levels of electrical conductivity of water (ECw; 1.6; 2.4; 3.2 and 4.0 dS m-1) and two concentrations of H2O2 (0 and 20 µM) with four replications. Irrigation water salinity from 1.6 dS m-1 caused changes in the stomatal conductance, respiration, and internal CO2 concentration of soursop plants. A 20 µM concentration of H2O2 reduced the effects of salinity on transpiration and CO2 assimilation values, in addition to promoting the biosynthesis of photosynthetic pigments and reducing cell damage in soursop plants, at 150 days after transplantation. The exogenous application of 20 µM H2O2 reduced the deleterious effects of salinity on the stem diameter of both rootstock and scion in soursop plants irrigated with ECw of 1.6 dS m-1. The exogenous application of 20 µM H2O2 was not efficient in mitigating the damage caused by salinity on the stem diameter of the soursop at grafting point.

show abstract

Section: According Tomentioning

confidence: 99%