Glandular Hairs and Essential Oil in Developing Leaves of Ocimum basilicum L. (Lamiaceae)

Werker, Ella; Putievsky, E.; Ravid, Uzi; Dudai, Nativ; Katzir, Irena

doi:10.1006/anbo.1993.1005

Cited by 206 publications

(147 citation statements)

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“…The production of many characteristic flavor-and fragrance-defining compounds is restricted to peltate glandular trichomes on its aerial surfaces (9,10). Construction of EST 2 libraries selectively using this specialized cell type (10) facilitated fruitful studies of its metabolic and physiological processes.…”

mentioning

confidence: 99%

The Roles of a Flavone-6-Hydroxylase and 7-O-Demethylation in the Flavone Biosynthetic Network of Sweet Basil

Berim

Gang

2013

Journal of Biological Chemistry

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Background: Late steps of lipophilic flavone biosynthesis in mints are unknown. Results: CYP82D monooxygenases catalyze 6-hydroxylation of 7-O-methylated precursor, whose 7-methyl group is subsequently removed by demethylation in basil but not in peppermint. Conclusion: Flavone biosynthesis in basil involves an unusual loop. Significance: Novel mechanisms elucidated in basil suggest a new hypothesis for similar metabolic networks in other plants.

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confidence: 99%

The Roles of a Flavone-6-Hydroxylase and 7-O-Demethylation in the Flavone Biosynthetic Network of Sweet Basil

Berim

Gang

2013

Journal of Biological Chemistry

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“…In some plants, the growth of leaf trichomes begins very early and their final number is established already during leaf differentiation, although, in other species, new hairs are formed during the entirety of leaf development (Valkama et al 2004;Werker 2000;Turner et al 2000). In many plant species, trichome density is very high in young leaves and decreases with leaf expansion (Valkama et al 2004;Werker et al 1993). It is suggested that, in young leaves, trichomes act as an epidermis, while, in the next stages of leaf development, their protective role is taken over by the epidermis (Valkama et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Contact angle measurements and water drop behavior on leaf surface for several deciduous shrub and tree species from a temperate zone

Papierowska

Szporak-Wasilewska

Szewińska

et al. 2018

Trees

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Key message Leaf CA measurement should take into account angle variation during measurement time. Leaf wettability of common deciduous forest plants is characterized by wetting contact angles ranging from 60° to 140° with a significant variation between species of the same family. Abstract Leaf wettability is an important phenomenon that has an influence on several processes such as the hydrological cycle, plant pathogen growth, or pollutant and pesticide absorption/deposition. The main objective of this research was to investigate the leaf wettability differences of 19 species (16 trees and 3 shrubs) of deciduous plants commonly occurring in Polish forests (temperate climate). The measurements were gathered as follows: 20 undamaged leaves were selected for each species and the wettability was determined by contact angle measurements with an optical goniometer CAM 100 using the sessile drop method. The contact angle was measured with 1-s intervals during 2 min from droplet deposition on adaxial and abaxial leaf surface. Laboratory analyses were completed during the summer of 2016 during full vegetation growth. A general CA decrease with time was observed on both leaf sides. The contact angle values ranged from 60° to 140° depending on species and leaf side. Differences between contact angle values at the beginning and the end of measurement reached 23.6° and engendered changes of wetting classes for some species. In many cases, no wettability class change was observed despite a CA lowering of 20°. The abaxial side was found to be the more repellent for 14 out of 19 species. Altogether, the leaves were classified from highly wettable to highly non-wettable, probably depending on the plant-survival strategy.

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“…The quality of herbs is, among other factors, infl uenced by the proportion of leaves and stems (Werker et al 1993, Ioannidis et al 2002, as well as by essential oil content (Rey and Saez 2002). A higher proportion of leaves than stems represents a higher quality, as the concentration of oil glands is the highest in mature leaves (Werker et al 1993, Ioannidis et al 2002 and in basil, leaves and calyxes have the highest concentration of oil glands (Putievsky and Galambosi 1999).…”

Section: Source Of Variation Dfmentioning

confidence: 99%

“…A higher proportion of leaves than stems represents a higher quality, as the concentration of oil glands is the highest in mature leaves (Werker et al 1993, Ioannidis et al 2002 and in basil, leaves and calyxes have the highest concentration of oil glands (Putievsky and Galambosi 1999). The leaf proportion in our experiment is analogous to the leaf-to-stem ratio used by Sifola and Barbieri (2006).…”

Section: Source Of Variation Dfmentioning

confidence: 99%

Effects of Biodynamic Production on Growth and Essential Oil Content in Basil

Dudaš¹,

Poljuha²,

Šola³

et al. 2016

Acta Botanica Croatica

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-The effects of a biodynamic sowing calendar on the growth (plant height, fresh herb yield, nodes number) and quality (percentage of leaf mass, essential oil content) of three basil species, Ocimum americanum L., Ocimum × hybrida and Ocimum basilicum L., represented by the cultivars 'Rosso' and 'Eco Genovese', were tested. Statistical analyses showed that the species had greater impact on the observed parameters than either the sowing date or the species and sowing date in combination. The species showed a signifi cant infl uence on all fi ve tested parameters, while sowing date and interaction of both factors signifi cantly infl uenced plant height, leaf percentage and essential oil content. The best yield per plant was obtained for O. × hybrida and O. basilicum 'Eco Genovese'. The lowest species O. × hybrida produced the highest amount of essential oil. »Nodes number« parameter most clearly separated the species, but not the cultivars. Even though O. americanum gave the tallest plants, it did not yield either the highest amount of fresh herb or essential oil. This species' height was most consistent, considering the signifi cant impact of biodynamic rhythm. Sowing date was not crucial for basil fresh yield; however if there is a need for taller plants with a higher percentage of leaf mass and more essential oil, sowing date needs to be controlled.

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Glandular Hairs and Essential Oil in Developing Leaves of Ocimum basilicum L. (Lamiaceae)

Cited by 206 publications

References 0 publications

The Roles of a Flavone-6-Hydroxylase and 7-O-Demethylation in the Flavone Biosynthetic Network of Sweet Basil

The Roles of a Flavone-6-Hydroxylase and 7-O-Demethylation in the Flavone Biosynthetic Network of Sweet Basil

Contact angle measurements and water drop behavior on leaf surface for several deciduous shrub and tree species from a temperate zone

Effects of Biodynamic Production on Growth and Essential Oil Content in Basil

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