Comparative floral development in Lamioideae (Lamiaceae): Marrubium, Phlomis, and Stachys

Naghiloo, Somayeh; Khodaverdi, Masumeh; Siahkolaee, Sedigheh Nikzat; Dadpour, Mohammad Reza

doi:10.1007/s00606-013-0960-1

Cited by 10 publications

(17 citation statements)

References 32 publications

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“…The unusual occurrence of secretory trichomes on the floral nectary of Scutellaria baicalensis , reportedly common in the mint subfamily Scutellarioideae and depicted by a line drawing (fig. 2 of Kartashova, 1960), has been verified recently by a morphological study of S. pinnatifida (Naghiloo et al, 2014a) and documented also for Marrubium parviflorum , for which Naghiloo et al (2014b) queried the trichomes’ role in nectar production. Although not mentioned, a further, low magnification SEM shows seven putative glandular trichomes dispersed along the summit of about two‐thirds the visible circumference of the annular nectary of Leonotus leonurus (fig.…”

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confidence: 74%

“…Glandular trichomes are known to arise near the floral nectary within other mint taxa. For example, such hairs are located atop the four‐lobed ovary of Ballota acetabularia (Petanidou et al, 2000), Marrubium parviflorum (Naghiloo et al, 2014b), and Satureja thymbra (Dafni et al, 1988; Petanidou et al, 2000), with those of S. farinacea sharing a strong resemblance to the peltate, glandular hairs on nutlets of Teucrium massiliense (Marin et al, 1994) and related species (Navarro and El Oualidi, 2000), leaves of T. montanum (Mráz, 1998), and atop the ovary of Leonotus leonurus (Ascensão et al, 1995). Compared with the hairs on other floral organs, those peltate hairs of L. leonurus are initiated extremely early during floral ontogeny (Ascensão et al, 1995), just like at the ovary base in S. farinacea .…”

Section: Discussionmentioning

confidence: 99%

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Annular floral nectary with oil‐producing trichomes in Salvia farinacea (Lamiaceae): Anatomy, histochemistry, ultrastructure, and significance

Zhang

Sawhney

Davis

2014

American J of Botany

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confidence: 74%

Section: Discussionmentioning

confidence: 99%

Annular floral nectary with oil‐producing trichomes in Salvia farinacea (Lamiaceae): Anatomy, histochemistry, ultrastructure, and significance

Zhang

Sawhney

Davis

2014

American J of Botany

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“…Similar to Scutellaria , in Marrubium glandular trichomes are found on the nectary and ovary tips (Naghiloo et al . ). There are also reports of developing dense fields of long hairs close to the nectary in Satureja (Dafni et al .…”

Section: Discussionmentioning

confidence: 97%

“…A comparison of floral ontogeny in four genera in the subfamily Nepetoideae (Naghiloo et al . ) indicated that Rosmarinus (with racemes) shows abaxial to adaxial unidirectional initiation, while reverse unidirectional initiation occurs in the three genera with thyrses ( Nepeta , Salvia , Ziziphora ). A similar pattern has also been reported among subfamilies of Verbenaceae (Liang et al .…”

Section: Discussionmentioning

confidence: 99%

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Floral development in Scutellaria pinnatifida (Lamiaceae): the ontogenetic basis for sepal reduction

Naghiloo

Gohari

Siahkolaee³

et al. 2014

Plant Biol J

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The Scutellaria is a Labiatae genus (subfamily Scutellarioideae) with a highly specialised floral structure. The genus is characterised by a peculiar two-lobed calyx with a projecting appendage, named the scutellum. Here, we present a detailed analysis of floral development, using epi-illumination light microscopy, to clarify open questions about its floral organisation. Floral whorls appeared in an acropetal sequence, with a marked temporal overlap of petal and stamen appearance. Organ appearance in each whorl proceeded unidirectionally from the abaxial to the adaxial side. Significant developmental features included the formation of the scutellum, reduction of sepal lobes and formation of a three-lobed nectary disc. Our study revealed that both loss of organ initiation and fusion of primordia are responsible for the reduction in sepal members in Scutellaria. The nectary structure was markedly different from most other studied Lamiaceae.

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Floral nectaries in Sapindaceae s.s.: morphological and structural diversity, and their systematic implications

et al. 2017

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We investigated the morphology and structure of the floral nectary in 11 Neotropical genera belonging to the subfamilies Dodonaeoideae and Paullinioideae (Sapindaceae) from southern South America representing three tribes (Dodonaeaeae, Paullinieae, and Melicocceae), in relation to other floral traits in species with contrasting morphological flower characteristics. Nectary organization was analyzed under light, stereoscopic, and scanning electron microscopes; Diplokeleba floribunda N.E. Br. was also observed using transmission electron microscopy. Our comparative data may contribute to the understanding of floral nectary evolution and systematic value in this family. The nectaries were studied in both staminate and pistillate flowers. All the floral nectaries are typical of Sapindaceae: extrastaminal, receptacular, structured, and persistent. The anatomical analysis revealed a differentiated secretory parenchyma and an inner non-secretory parenchyma; the nectary is supplied by phloem traces and, less frequently, by phloem and xylem traces. Nectar is secreted through nectarostomata of anomocytic type. The anatomical analysis showed the absence of nectary in the three morphs of Dodonaea viscosa flowers. Nectary ultrastructure is described in D. floribunda. In this species, the change in nectary color is related to progressive accumulation of anthocyanins during the functional phase. We found relatively small variation in the nectary structural characteristics compared with large variation in nectary morphology. The latter aspect agreed with the main infrafamilial groupings revealed by recent phylogenetic studies, so it is of current valuable systematic importance for Sapindaceae. In representatives of Paullinieae, the reduction of the floral nectary to 4-2 posterior lobes should be interpreted as a derived character state.

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Comparative floral development in Lamioideae (Lamiaceae): Marrubium, Phlomis, and Stachys

Cited by 10 publications

References 32 publications

Annular floral nectary with oil‐producing trichomes in Salvia farinacea (Lamiaceae): Anatomy, histochemistry, ultrastructure, and significance

Annular floral nectary with oil‐producing trichomes in Salvia farinacea (Lamiaceae): Anatomy, histochemistry, ultrastructure, and significance

Floral development in Scutellaria pinnatifida (Lamiaceae): the ontogenetic basis for sepal reduction

Floral nectaries in Sapindaceae s.s.: morphological and structural diversity, and their systematic implications

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