Secretory structures of Santolina ligustica Arrigoni (Asteraceae), an Italian endemic species

Pagni, Anna Maria; Orlando, Romina; Masini, Antonio; Ciccarelli, Daniela

doi:10.1560/ggyh-4404-qc86-krhv

Cited by 19 publications

(22 citation statements)

References 17 publications

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“…These type of trichomes, both in vegetative and in reproductive organs, were anatomically described in other Asteraceae, Tagetes minuta (Del Fueyo, 1986), Artemisia campestris (Ascensão and Pais, 1988), Tagetes patula (Poli et al, 1995), Artemisia nitida (Corsi and Nencioni, 1995), Porophyllum spp. (Guillet et al, 1997;Rossi Monteiro et al, 1999), Santolina leucantha (Pagni and Masini, 1999), Stevia rebaudiana (Cornara et al, 2001), Santolina ligustica (Pagni et al, 2003), Achillea maritima, Bellis perennis, Dittrichia viscosa, Eupatorium cannabinum, Matricaria chamomilla, Pulicaria dysenterica, and Tanacetum parthenium (Ciccarelli et al, 2007). These trichomes are similar in the function but present anatomical differences and are formed by a variable number of cells in the different species.…”

Section: Discussionmentioning

confidence: 99%

“…The secretion of ducts and hairs is composed of essential oils, lipids, resins, sesquiterpene lactones, alkaloids, pectin-like substances, tannins and flavonoids (Andreucci et al, 2008;Pagni et al, 2003). In the genus Grindelia, the substances secreted are resins, composed of a mixture of labdane diterpene resin acids (Timmermann and Hoffmann, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Secretory structures have been investigated in several genera of Asteraceae (Ascensão and Pais, 1988;Cornara et al, 2001;Corsi and Nencioni, 1995;Del Fueyo, 1986;Guillet et al, 1997;Pagni and Masini, 1999;Pagni et al, 2003;Poli et al, 1995;Rossi Monteiro et al, 1999). However, there are few ultra-structurally studies; only the secretory cavities of Porophyllum lanceolatum (Rossi Monteiro et al, 1999) and Artemisia campestris (Ascensão and Pais, 1988) were studied.…”

Section: Introductionmentioning

confidence: 99%

“…(Guillet et al, 1997;Rossi Monteiro et al, 1999), Santolina Tourn. (Pagni and Masini, 1999;Pagni et al, 2003), Stevia Cav. (Cornara et al, 2001), Tagetes L. (Poli et al, 1995), and Viguiera Kunth (Da Costa et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Anatomical studies of the secretory structures: Glandular trichomes and ducts, in Grindelia pulchella Dunal (Astereae, Asteraceae)

Bartoli

Galati

Tortosa

2011

Flora

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Anatomical studies of the secretory structures: Glandular trichomes and ducts, in Grindelia pulchella Dunal (Astereae, Asteraceae)

Bartoli

Galati

Tortosa

2011

Flora

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“…Most studies on secretory structures have focussed on the occurrence of ducts in non-thickened roots (Grotta 1944;Williams 1947Williams , 1954Hoehne et al 1952;Curtis 1986, 1988;Joseph et al 1988;Curtis and Lersten 1990;Poli et al 1995;Luque et al 1997;Sacchetti et al 1997;Duarte and Estelita 1999;Pagni and Masini 1999;Menezes 2002, 2003;Pagni et al 2003;Lotocka and Geszprych 2004;Luque-Arias 2004;Machado et al 2004;Fonseca et al 2006;Vilhalva and Appezzato-da-Glória 2006;Appezzato-daGlória et al 2008b), with only few having studied the secretory structures in thickened underground systems (Hoehne et al 1952;Panizza and Grotta 1965;Ragonese 1988;Curtis and Lersten 1990;Lotocka and Geszprych 2004;Machado et al 2004;Vilhalva and Appezzato-da-Glória 2006;Appezzato-da-Glória et al 2008b).…”

Section: Introductionmentioning

confidence: 99%

Internal secretory spaces in thickened underground systems of Asteraceae species

Cury

Appezzato‐da‐Glória

2009

Aust. J. Bot.

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Secretory structures are present in many vascular plants and have an important ecological role as a plant defence mechanism against herbivors and pathogens. Internal secretory spaces of lipid substances are widespread in the Asteraceae. However, information about the occurrence of these structures in thickened underground systems is sparse, compared with what we know about aerial systems. The main objective of the present paper was to investigate the occurrence, formation and chemical nature of the secretory structures in six Asteraceae species belonging to the following tribes: Eupatorieae (Mikania cordifolia and M. sessilifolia), Mutisiae (Trixis nobilis), Plucheeae (Pterocaulon alopecuroides) and Vernonieae (Vernonia elegans and V. megapotamica). The samples were collected in areas of Cerrado (tropical savanna) in the state of São Paulo, Brazil. The secretory structures found were cortical canals in roots (T. nobilis, P. alopecuroides, V. elegans and V. megapotamica), cortical cavities in roots (M. cordifolia, M. sessilifolia and P. alopecuroides), cavities in the secondary phloem of roots (T. nobilis), cortical cavities in the xylopodium (M. cordifolia, M. sessilifolia, P. alopecuroides and V. megapotamica) and in the underground stem (T. nobilis), and canals in the secondary xylem in the xylopodium (M. cordifolia and M. sessilifolia). Histochemical tests showed the presence of lipid substances in all structures.

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Comparative ultrastructure of trichomes on various organs of Rosa roxburghii

Wang

Lü

Ludlow

et al. 2021

Microscopy Res & Technique

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Chestnut rose, R. roxburghii Tratt. (Rosaceae) (RR) is an important crop in China due to its nutritional and medicinal values. RR frequently produces trichomes on the surfaces of a diverse range of organs, however a genetic component exists to the control of trichome development, with some cultivars having significantly fewer trichomes to others. Certain varieties have fruits that are thickly covered with macroscopic trichomes, which is an undesirable trait for fruit processing and consumption. However, smooth‐fruit cultivars exist, such as R. roxburghii Tratt. f. esetosa Ku (RRE). Despite their economic importance, the anatomical features of trichomes have not been explored in detail for these two chestnut rose germplasms. Here, we investigate the ultrastructure of trichomes distributed on the stem, sepal, and fruit of RR and RRE using transmission electron microscopy (TEM). The internal structure of stem prickle trichomes in RR and RRE was oval in shape and did not contain nucleoli or other organelles. The cell walls of stem prickles in RR are thick and the intercellular spaces occupied with liquid, whereas the cells wall of stem prickles in RRE are thin and have air‐filled intercellular spaces. The cells of sepal acicular trichomes in RR and glandular trichomes (GTs) of sepals in RRE had similar vacuole sizes, cytoplasm content, intercellular spaces, and arrangement of plastids within cells. However, there were osmiophilic granules present in the GTs of RRE. The flagelliform trichomes in the sepals of the two germplasms are composed of oval or rod‐shaped cells. Although the flagelliform trichomes in the sepals of the two germplasms had a similar internal structure, and both contained starch grains and plastids with visible thylakoid membranes, the flagelliform trichomes in the sepals of RR had a thinner cell wall and a higher proportion of cytoplasm which was more evenly distributed across the cell. There were granules that stained heavily with osmium tetroxide which occurred infrequently in the flagelliform trichomes of sepals in RRE but were not observed in RR. On the acicular trichomes of fruit in RR, the flagelliform trichomes and the GTs of fruit in RRE shared similar cell morphology, arrangement and vacuole size as well as intercellular space. Both the fruit flagelliform trichomes and GTs in RRE contain granules which stain heavily with osmium tetroxide, and the GTs contain plastids and starch grains. These differences in trichome cell ultrastructure may be related to developmental processes or biological functions of the trichomes. These results also suggest that the two chestnut rose germplasms are good candidates for further study of trichome ontogeny in the genus and subsequent breeding of the smooth organ trait in this species.

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Secretory structures of Santolina ligustica Arrigoni (Asteraceae), an Italian endemic species

Cited by 19 publications

References 17 publications

Anatomical studies of the secretory structures: Glandular trichomes and ducts, in Grindelia pulchella Dunal (Astereae, Asteraceae)

Anatomical studies of the secretory structures: Glandular trichomes and ducts, in Grindelia pulchella Dunal (Astereae, Asteraceae)

Internal secretory spaces in thickened underground systems of Asteraceae species

Comparative ultrastructure of trichomes on various organs of Rosa roxburghii

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