1970
DOI: 10.3329/bjb.v36i1.1547
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Morphogenetic and diurnal variation of total phenols in some <i>Hypericum</i> species from Turkey during their phenological cycles

Abstract: The genus Hypericum has attracted scientific interest worldwide

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Cited by 23 publications
(7 citation statements)
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“…Previous researches highlighted the role of phenological stages in the contents of polyphenols in different species such as Boerhavia diffusa, Sida cordifolia [51] and Hypericum pruinatum. [52] In overall, there was a major correlation among the biosynthesis of phenolic compounds in plants and their maturity stages. [36] at the 50 % flowering stage, the results demonstrated that the highest polyphenols (including flavonoids and phenolics) accumulation level could be depended on the beginning period of organs maturity that was accompanied by the physiological and ecological functions of polyphenols, the change of biochemical and molecular mechanisms such as loss of protein or nitrogen contents as well as chlorophyll structural damages.…”
Section: Total Phenolic (Tpc) and Total Flavonoid Content (Tfc)mentioning
confidence: 99%
“…Previous researches highlighted the role of phenological stages in the contents of polyphenols in different species such as Boerhavia diffusa, Sida cordifolia [51] and Hypericum pruinatum. [52] In overall, there was a major correlation among the biosynthesis of phenolic compounds in plants and their maturity stages. [36] at the 50 % flowering stage, the results demonstrated that the highest polyphenols (including flavonoids and phenolics) accumulation level could be depended on the beginning period of organs maturity that was accompanied by the physiological and ecological functions of polyphenols, the change of biochemical and molecular mechanisms such as loss of protein or nitrogen contents as well as chlorophyll structural damages.…”
Section: Total Phenolic (Tpc) and Total Flavonoid Content (Tfc)mentioning
confidence: 99%
“…The content of the inhibition percentage showed the same increase in the highest concentrations (0.4 and 0.6mg/ml) in different phonologic stages (Figure 1). Also, it has been shown that total polyphenolic content increased at the flowering stage in Boerhavia diffusa, Sida cordifolia (Verma and Kasera 2007) and Crithmum maritimum (Males et al, 2003), during floral budding in Hypericum hyssopifolium, H. scabrum and at full flowering in H. pruinatum (Ayan et al, 2007). In addition, in spinach leaves, higher levels of total phenolics and antioxidant capacity were reported at the mid-maturity stage in comparison with the immature stage (Pandjaitan et al, 2005).…”
Section: Resultsmentioning
confidence: 98%
“…[16] Indeed, it is well known that flavonoids and phenolic acids play important role in the mechanisms of adaptations of plants to several stresses. [17] In another studying, seasonal change in contents of phenolic compounds in several species, such as Boerhavia diffusa, Sida cordifolia, [18] Hypericum pruinatum, [19] Thymbra spicata, and Satureja thymbra, [20] investigators have found a maximal production of phenolics at flowering. Regarding these variations in the accumulation of secondary metabolites in A. herba-alba plants, it could be concluded that the physiological stage of the plant affects the choice of best harvesting time.…”
Section: Effect Of Harvest Time On Yield and Components Of Polyphenolsmentioning
confidence: 99%