Influence of Environmental Factors on the Genetic and Chemical Diversity of Brickellia veronicifolia Populations Growing in Fragmented Shrublands from Mexico

Abstract

Brickellia veronicifolia is a native Asteraceae from Mexico that persists in fragmented habitats. This investigation reports the genetic and chemical diversity of B. veronicifolia. The diversity analysis based on iPBS markers showed an averaged Shannon index (S) of 0.3493, a Nei genetic diversity (h) of 0.2256, and a percentage of polymorphic loci average (P) of 80.7867%. The population structure obtained by AMOVA revealed that the highest variation found within populations was 94.58%. GC-MS profiling of six populations indicated that major volatiles were β–caryophyllene (11.63%), spathulenol (12.85%), caryophyllene oxide (13.98%), α–cadinol (7.04%), cubedol (6.72%) and tau-muurolol (4.81%). Mantel tests suggested a statistically significant relationship between minor volatiles and geographical distance (r = 0.6163; p = 0.0470; p ˂ 0.05). Likewise, major volatiles showed a significant correlation with the soil pH (r = 0.6862; p = 0.0230) and maximum temperature (r = 0.4999; p = 0.0280). Our study suggests that the variation and genetic divergence of B. veronicifolia has no relationship with climatic parameters, whereas the volatiles are probably influenced by environmental factors and not by the genotype per se. Based on the characteristics of B. veronicifolia, this plant could be considered as a candidate for restoring fragmented shrublands in Mexico.

Volatiles of Zanthoxylum limoncello as Antifungal Agents against the Postharvest Rot of Manzano Pepper Triggered by Fusarium temperatum

“…Unexpectedly, 2-dodecenal, and 2-undecenal caused a more prolonged fungistatic effect than that observed for ZlEO and 2-undecanone under in situ conditions (Figures 3 and 4). The amphipathic ability of these oxygenated hydrocarbons to cross fruit cuticle and cell membranes could probably be considered as the mode of action to exert their antifungal activity under in situ conditions [23]. The present investigation demonstrates the individual bioactivity and effectiveness of 2-dodecenal and 2-undecenal for the control of F. temperatum in manzano peppers.…”

“…Our records stated that the application of ZlEO, 2-undecanone, 2-undecenal, and 2-dodecenal on the exocarp of manzano peppers previously infected with F. temperatum, resulted in a significant delay of rot symptoms from the fifth day to tenth-day post-inoculation (Figures 3 and 4). The in vitro antifungal effect of the three main volatiles dissolved in ZlEO has recently been demonstrated in F. oxysporum [23]. Nonetheless, our investigation is the first one demonstrating the in situ antifungal effects of 2-dodecenal, 2undecenal, and 2-undecanone on an edible fruit infected with a wild strain of F. temperatum.…”

Assessing variation inCitrus limon‘Assam lemon’: morphological, seed availability pattern, and biochemical diversity across different districts of Assam

“…This emphasizes the significance of considering the morphological diversity within the Assam lemon cultivar, as it holds implications for genetic differentiation, adaptation, and potential breeding strategies (Wang et al 2015). These findings also open up avenues for further investigation into the underlying factors (such as environmental influences, genetic factors, or geographical factors) contributing to the observed morphological variations, thus can enhance our understanding of the complex dynamics within the Assam lemon populations (Pacheco-Hernandez et al 2021). Similar observations were also documented for UPGMA clustering analysis, where a total of 133 populations formed two distinct clusters.…”

Untargeted metabolomics approach and molecular networking analysis reveal changes in chemical composition under the influence of altitudinal variation in bamboo species

“…The heatmap shows a clear difference in the content of flavonoids and cinnamic acid derivatives between the groups compared under the effect of the altitudinal gradient, which could serve as marker compounds for chemical classification. The metabolites exposed to the variable altitude showed a significant difference, indicating that environmental factors have previously influenced the genetic and chemical diversity of plants (Pacheco-Hernández et al, 2021).…”