Taxonomic aspects of the iridoid glucosides occurring in the genus Plantago L.

The results of studies of the iridoid glucosides distribution within the genus Plantago indicated the significance of catalpol, plantarenaloside and bartsioside for the taxonomy of this taxon

Ontogeny of trichomes in taxa of the genus Plantago subg. Psyllium (Plantaginaceae)

This paper is a continuation of the investigation of hair ontogeny in taxa of the Plantaginaceae family. The previous publication dealt with the development of hairs in representatives of the subgenus Plantago. The present paper concerns the investgation of 5 species of the subgenus Psyllium: Plantago squarrosa, P. arenaria, P. afra, P. webbii and P. arborescens. The development of three types of headed hairs and one type of headless hair has been studied. The hypotetic phylogeny of the hairs of the genus Plantago is presented

The morphology of hairs in species of Plantago L. Sections: Novorbis Decne and Mesembrynia Decne

This paper is a continuation of the investigation of hairs in representatives of various sections of the genus Plantago L.(Andrzejewska-Golec and Świętosławski 1987, 1988, 1989 a, b, 1991, in press 2). It deals with the species of the related sections: Novorbis Decne (3 species) and Mesembrynia Decne (5 species). The investigated taxa of both sections have one type of headed hair (typical of the representatives of the genus Plantago) as well as three types of headless hairs: 1) 1-3-celled-bristle-shaped, 2) consisting of several cells, and 3) multicellular-web-like. Only slight differences between the hairs of the investigated taxa of sections Novorbis and Mesembrynia were noticed. The hairs of the representatives of these sections are also similar to the hairs of representatives of another section, related to those mentioned above, viz. Lamprosantha Decne (Andrzejewska-Golec and Świętosławski 1991)

The morphology of hairs in species of Plantago L. sectio Coronopus DC.

The hairs of 13 representatives of sectio Coronopus DC. genus Plantago were studied. The occurrence of 5 types of headless and 4 types of headed hairs was found. The investigations confirm the correctness of Rahn's (1978) and Dietrich's (1980) classification dividing the sectio Coronopus (subgenus) into two lower taxonomic units. Sectio Coronopus sensu Rahn is characterized by the presence of bottle-like hairs, while sectio Maritima Rahn by the occurrence of morel-like hairs

Micropropagation of Plantago asiatica L. through culture of shoot-tips

Shoot-tip multiplication of the medicinal species - Plantago asiatica was carried on MS medium with IAA and BAP or kinetin. Best results in micropropagation were achieved by adding 0.1 mg/dm3 IAA and 1 mg/dm3 BAP. After 6 weeks shoots were transferred to MS medium for rooting. The resulting plantlets were transferred after 8 weeks into pots and after a period of adaptation into the ground (field culture).The species Plantago asiatica was propagated in vitro by shoot-tip multiplication for the first time

The morphology of hairs in taxa of the genus Plantago L. Sections: Polyneuron Decne and Lamprosantha Decne

The hairs of above-ground parts (leaf, scape, bract, calyx) of 10 taxa from the section Polyneuron Decne and three from section Lamprosantha Decne are very similar. The presence of one type of headed hairs and three types of headless hairs was found in all of the studied taxa. The headed hairs are built analogically. The headless hairs in the taxa of section Polyneuron are composed of 3-4 cells, while in the taxa of sectio Lamprosantha, of 6-7 cells. P. japonica Franchet et Savat. f. polystachya Makino distinguishes itself among all the studied taxa because of the presence of a small basal cell in the headless hairs made up of several cells

The morphology of hairs in species of Plantago L. Sections: Leucopsyllium Decne and Hymenopsyllium Pilger

The hairs of the following representatives of the genus Plantago were studied: Plantago ovata Forsk., P. hookeriana Fisch. et Mey. (sectio Leucopsyllium Decne) and P. bellardii All. (sectio Hymenopsyllium Pilger). The occurrence of 3 types of headed hairs and 4 types of headless hairs was observed. P. bellardii is characterized by the presence of hairs with an unicellular, flask-shaped head and a four-celled stalk on a calyx and bract. Until now this type of hair has not been described in the representatives of the genus Plantago. The presence of appendices joining particular cells of the hair is the common feature of the studied taxa, which at present seems to distinguish the above-mentioned sections from other sections of the genus Plantago. The results of our study, similarly as the chemotaxonomic studies of Gorenf1ot and Bourdu (1962) confirm Pilger's accuracy in excluding P. bellardii from the sectio Leucopsyllium and formation of a distinct sectio Hymenopsyllium Pilger

The morphology of hairs in Plantago famarae Svent.

This paper is a part of a series of investigations on hairs in the genus Plantago L. It deals with an endemic taxon - Plantago famarae Svent. which has not been investigated yet in respect to hairs. The presence of two types of headless hairs and two types of headed hairs was observed. The results of this study are compared to those of another work on two other species from the Canary Islands. P. famarae does not differ from P. arborescens by either hair type or distribution. However, in contrast to P. webbii it has no web-like hairs while hairs with a multicellular stalk and unicellular head hairs (characteristic for the taxa of subgenus Psyllium) are distributed in a different way