Seasonal Changes of Some Metabolites in Hyoscyamus boveanus (Dunal) Asch. & Schweinf – Saint Katherine, South Sinai, Egypt

Abstract

This study was conducted to investigate the effects of seasonal fluctuations on some metabolites and to explore the correlation between soil and plant analysis in Hyoscyamus boveanus (H.boveanus) at the Wadi El-Sheikh Awad in Saint Katherine, South Sinai, Egypt. Significant differences (p < 0.05) were observed for physical and chemical properties of the soil associated with H. boveanus during 0-20 and 20-40 cm depths, which increased most of them during the first depth. All chemical composition contents of H. boveanus are influenced significantly (p < 0.05) by seasons studied, except Na+, glycosides, total phenol, crude protein contents. A substantial increase in mineral composition (Na+, K+, P and Fe2+), total alkaloids, glycosides, total phenol, proline, total carbohydrates and all photosynthetic pigments contents were recorded in H. boveanus during the summer season. While, the mineral composition (Ca2+, Mg2+, S, N and Cl-), water content and crude protein contents appeared to be higher in the winter season. The relationships between soil and plant variables were delineated by performing the principal component analysis (PCA). The PC1 and PC2 displayed differences between the soil and plant variables, also, the variables Mg2+, Cl-, pH, EC, Ca2+ and K+ in the soil associated with H. boveanus are variables with better chemical properties of the soil, which affect the plant distribution in Wadi El-Sheikh Awad during the two seasons. The PCA revealed high positive correlations among soil variables as well as among plant variables. Soil magnesium correlated highly and positively with the plant variables i.e., crude protein, water content, Chl b, Chl a+b, carotein and total pigment contents. The pH, EC, and Ca2+ in soil were positively correlated with all chemical composition contents of H. boveanus. Some metabolites in H. boveanus were significantly increased during the summer season compared to the other season, due to the activation of plant physiological stress tolerance mechanisms.

Effect of Seasonal Changes on Photosynthetic Pigments and Proline Contents of Some Plants Growing Naturally in Tayma Region, Saudi Arabia

“…The two-way ANOVA demonstrated a significant effect (P < 0.05 or 0.01) of plant species, depths and their interaction on all soil chemical properties under study, with the exception of Ec, HCO 3 and SO 4 -by depth factor, as well as pH, Ec and Ca ++ by species x depths interaction. Our results were in line with El-Absy [6], El-Absy and Kamel [13], Han et al [52] and Jamin et al [53].…”

“…3 revealed a highly significant effect (P < 0.01) of the plant species, seasons and depths on the water content % in soil associated with the three plant species. The same results were obtained by El-Absy [6], El-Absy and Kamel [13] and El-Lamey [62], who stated that the depths and seasons factors were significant effects on the soil water content% of plant species in various habitats studied. While the effects of the first and second interaction on the soil supporting three plant species in two depths across winter and summer seasons were insignificant.…”

“…The productivity of ecosystems is decreased, along with the diversity and relative abundance of species, by factors such as soil degradation, drought, global warming, extinction of perennially palatable species, overgrazing, and humancaused activities [1,2]. Numerous researchers have noted seasonal variations in the chemical or biological components of a variety of plant species, for example Peters et al [3], Ramírez-Briones et al [4], Huang et al [5], El-Absy [6]. Seasonal variations affect the different biochemical characteristics of the wild plant species, these variations significantly were noticed in the active components of these species, and these variations are caused by variations in environmental factors including rainfall, temperature, and other factors [7,8].…”

“…Seasonal variations affect the different biochemical characteristics of the wild plant species, these variations significantly were noticed in the active components of these species, and these variations are caused by variations in environmental factors including rainfall, temperature, and other factors [7,8]. El-Absy [6] and Kamel and El-Absy [9] conducted a study on the seasonal variation in the chemical composition of soil and plants and found that significant differences were seen to represent real environmental variations in chemical composition throughout the seasons, species, and their interactions.…”

“…El-Ghani and Amer [35] stated that the correlations between the recorded soil characteristics and the vegetation are examined using multivariate statistical methods. The principal component analysis (PCA) has been used to study the relationship between soil parameters and plant variables by many researchers, for example El-Absy [6], El-Ghani & Amer [35] Ferraz et al [36], Metwally et al [37], Abdel-Fattah et al [38] and El-Absy [39].…”