Plectranthus madagascariensis: Morphology of the Glandular Trichomes, Essential Oil Composition, and Its Biological Activity

1998 ◽  
Vol 159 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Lia Ascensão ◽  
A. Cristina Figueiredo ◽  
José G. Barroso ◽  
Luis G. Pedro ◽  
Jan Schripsema ◽  
...  
Keyword(s):  
Biological Activity ◽  
Essential Oil ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Oil Composition

Impact of mulching on growth essential oil composition and its biological activity in Monarda didyma L.

2019 ◽  
Vol 129 ◽  
pp. 299-308 ◽  
Author(s):  
Katarzyna Wróblewska ◽  
Antoni Szumny ◽  
Barbara Żarowska ◽  
Krystyna Kromer ◽  
Regina Dębicz ◽  
...  
Keyword(s):  
Biological Activity ◽  
Essential Oil ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Monarda Didyma

Antimicrobial Activity, Essential Oil Composition and Micromorphology of Trichomes of Satureja laxiflora C. Koch from Iran

2004 ◽  
Vol 59 (11-12) ◽  
pp. 777-781 ◽  
Author(s):  
Ali Sonboli ◽  
Alireza Fakhari ◽  
Mohammad Reza Kanani ◽  
Morteza Yousefzadi
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Glandular Trichomes ◽  
Antimicrobial Property ◽  
Reproductive Organs ◽  
Essential Oil Composition ◽  
Geranyl Acetate ◽  
Native Plant ◽  
Oil Composition ◽  
Total Oil

The antimicrobial activity, essential oil composition and micromorphology of trichomes of Satureja laxiflora C. Koch, a native plant from Iran, were studied. The essential oil was obtained from the aerial parts at the flowering stage by hydrodistillation, and analyzed by GC and GC/MS. Thirty-three compounds representing 99.1% of the total oil were characterized. The major compounds were thymol (63.9%) and γ-terpinene (11.9%) followed by carvacrol (4.8%), p-cymene (3.9%), geraniol (3.2%) and geranyl acetate (3.1%). Furthermore, the essential oil and its three main components were tested against two bacteria and three fungi. The result of the bioassays has been shown that the oil possesses potent antimicrobial property. Chemical studies confirmed that a major portion of this antimicrobial activity is due to thymol present in the oil. Micromorphological analysis by SEM of both vegetative and reproductive organs revealed the presence of abundant sessile capitate and sparse short-stalked glandular trichomes along with retrorse eglandular hairs, giving useful diagnostic characters for identification of this medicinal plant.

In vitro biological activity and essential oil composition of four indigenous South African Helichrysum species

2004 ◽  
Vol 95 (2-3) ◽  
pp. 253-258 ◽  
Author(s):  
A.C.U. Lourens ◽  
D. Reddy ◽  
K.H.C. Başer ◽  
A.M. Viljoen ◽  
S.F. Van Vuuren
Keyword(s):  
Biological Activity ◽  
Essential Oil ◽  
South African ◽  
Essential Oil Composition ◽  
Oil Composition

Glandular trichomes, histochemical localization of secretion, and essential oil composition inPlectranthus grandidentatusgrowing in Portugal

2013 ◽  
Vol 28 (6) ◽  
pp. 393-401 ◽  
Author(s):  
Luísa Mota ◽  
Ana Cristina Figueiredo ◽  
Luis G. Pedro ◽  
José G. Barroso ◽  
Lia Ascensão
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Histochemical Localization ◽  
Oil Composition

COMPARATIVE STUDY OF LEAF ANATOMY AND ESSENTIAL OILS OF THE HYBRID MENTHA X VILLOSO-NERVATA AND ITS PARENTAL SPECIES M. LONGIFOLIA AND M. SPICATA

1998 ◽  
Vol 46 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Nikos Gavalas ◽  
Artemios Bosabalidis M. ◽  
Stella Kokkini
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Leaf Surface ◽  
Parental Species ◽  
Glandular Trichomes ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Lower Leaf Surface ◽  
Palisade And Spongy Parenchyma ◽  
Derivatives Of

Leaves of the hybrid Mentha x villoso-nervata are covered with nonglandular trichomes of intermediate length between those of its parental taxa M. longifolia and M. spicata. Glandular trichomes producing essential oils are more numerous on the lower leaf surface than on the upper one in all three mints. Their number per mm2 is higher in M. spicata and it decreases in M. longifolia and M. x villoso-nervata. Stomata are also more numerous on the lower leaf surface of the three taxa, with M. longifolia predominating. The leaf lamina of M. x villoso-nervata is ca. 83% thicker than that of M. longifolia and ca. 9% thicker than that of M. spicata. The number of chloroplasts per mm2 of mesophyll section (leaf cross section) is higher in M. X villoso-nervata. In leaf paradermal sections, the sizes of the epidermal, palisade, and spongy parenchyma cells of M. X villoso-nervata have intermediate values between those of its parental species M. longifolia and M. spicata. M. x villoso-nervata leaves are the lowest in essential oil content. As concerns the essential oil composition, the hybrid resembles one parent, M. longifolia, in the derivatives of piperitenone and piperitone, and the other parent, M. spicata, in the high amount of limonene. It differs, however, from its parental species in that it contains a higher amount of germacrene D.

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