Aluminum stress in Crambe abyssinica Hochst

Abstract

Crambe is a sensitive specie to exchangeable aluminum, it require a well-fertilized and corrected soil. The objective of this study was to understand the impact of aluminum presence, in different concentrations, in the substrate on the germination and development of crambe. The experiment was carried out as a randomized complete block design with a 5x2 factorial arrangement in four replicates. The five concentrations of Al 3+ were 0, 15, 40, 80 and 120 mg dm -3 Al 3+ and two temperatures (20 and 30 °C), with four replications. The relative growth rate, plant height, leaf number, total leaf area, specific leaf area, dry matter in each plant compartment (root, stem and leaf), leaf area ratio, stem mass ratio and leaf mass ratio were evaluate. Germination was favored by 20 ºC. The limitation on plant growth was greater as the concentration of aluminum increased, presenting losses in growth, as well of production of dry matter and leaf development, also causing changes in the patterns of biomass allocation between the plant compartments.Keywords: crambe, toxicity, germination, growth. RESUMEN Crambe es una especie sensible al aluminio intercambiable que requiere suelos bien fertilizados y corregidos. El objetivo de este trabajo fue evaluar distintas concentraciones de aluminio en la germinación y desarrollo de crambe. El experimento para germinación se realizó con un diseño de bloques completos al azar con arreglo factorial de 5x2, con cuatro repeticiones. Las cinco concentraciones de

Performance of Crambe Submitted to Aluminum Stress: An Important Oilseed Plant

“…In Figure 3). Inte ared with the c l L -1 ), there w ment (Figure 3 The sensitivity of crambe to Al toxicity in terms of plant growth and grain yield, reported here, is supported by results of other studies Colodetti et al, 2015). Silva et al (2017) found that when the base saturation of the soil was 70%, crambe plants achieved higher grain yield.…”

“…Aluminum toxicity may also result in apoptotic injuries and cell wall and the plasma membrane interactions (Dipierro et al, 2005), affecting the plant growth. The stagnation of crambe plant growth subjected to high concentrations of Al 3+ , as observed in this study, was also reported by Colodetti et al (2015). Al uptake by plants affected cells and organelles at morphological and cytogenetic levels, damaging the development and establishment of crops (Macedo et al, 2008;Crestani et al, 2009).…”

Excess aluminum tolerance of the common water-hyacinth (Eichhornia crassipes) under greenhouse conditions

“…Plants exposed to 0.4, 0.6, and 0.8 mg L -1 Al 3+ had a reduction in leaf area of 9.75%, 28.77%, and 41.88%, respectively, in relation to control plants (Figure 1), with differences that were significant. Colodetti et al (2015) found that foliar area in Crambe abyssinica plants suffered a drastic reduction as a consequence of exposure to Al 3+ , a result that was observed even when plants were exposed to the lowest concentration of the metal studied in this experiment. Thus, these authors state that this variable resulted in an exponential decrease with increasing Al 3+ concentration.…”

“…In contrast, Kabir et al (2010) found that LAR had an inversely proportional behavior in Thespesia populnea plants exposed to different concentrations of Pb. In the particular case of Al toxicity, Colodetti et al (2015) found that the LAR recorded in Crambe abyssinica plants exposed to increasing Al concentrations decreased with the addition of the metal up to a concentration of 78 mg Al 3+ dm -3 . After that concentration, a small increase in the value of LAR was observed.…”

“…In relation to the effect of Al 3+ in plantlets, it has been found that when seedlings of Crambe abyssinica are exposed to Al 3+ , the damage caused to its development was more severe as the concentration of Al 3+ increased in the substrate. Thus, as a consequence of exposure to Al 3+ , decreased growth, biomass accumulation and leafiness, as well as changes observed in DM partitioning in the different organs of the plants were seen (Colodetti et al, 2015). Additionally, it is reported that the presence of Al in the substrate reduces the percentage of germination in seeds of Triticum aestivum and Zea mays, by 31% and 15%, respectively (Casierra-Posada et al, 2008).…”