TL;DR: The structure of the salt glands in the three families is described and it is concluded that the establishment of lineages with salt glands took place after the split between the Polygonaceae and its sister group the Plumbaginaceae.
Abstract: The Plumbaginaceae (non-core Caryophyllales) is a family well known for species adapted to a wide range of arid and saline habitats. Of its salt-tolerant species, at least 45 are in the genus Limonium; two in each of Aegialitis, Limoniastrum and Myriolimon, and one each in Psylliostachys, Armeria, Ceratostigma, Goniolimon and Plumbago. All the halophytic members of the family have salt glands and salt glands are also common in the closely related Tamaricaceae and Frankeniaceae. The halophytic species of the three families can secrete a range of ions (Na+ , K+ , Ca2+ , Mg2+ , Cl- , HCO3 - , SO4 2- ) and other elements (As, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn). Salt glands are, however, absent in salt-tolerant members of the sister family Polygonaceae. We describe the structure of the salt glands in the three families and consider whether glands might have arisen as a means to avoid the toxicity of Na+ and/or Cl- or to regulate Ca2+ concentrations with the leaves. We conclude that the establishment of lineages with salt glands took place after the split between the Polygonaceae and its sister group the Plumbaginaceae.
TL;DR: The European and Mediterranean species of the Acalyptris platani and A .
Abstract: The European and Mediterranean species of the Acalyptris platani and A . staticis groups are revised, with respectively four and six species. Three new species are described: A . pistaciae Van Nieukerken sp. n. (from Greece, Cyprus and Turkey, on Pistacia ) in the platani group, A . limoniastri Van Nieukerken sp. n. (from Algeria and Tunisia, associated with Limoniastrum ) and A . lesbia Van Nieukerken & Hull sp. n. (from Greece: Lesvos, on Limonium gmelini ) in the staticis group. Lectotypes are selected for A . minimella (Rebel, 1924) and A . staticis (Walsingham, 1908). The European species of the A . platani group are leafminers on Anacardiaceae, Platanaceae and Loranthaceae, the species of the A . staticis group feed on Plumbaginaceae, except A . pyrenaica A. & Z. Lastůvka, for which the host is unknown, but likely to belong to another family. Immatures are described for five species, final instar larvae and pupal exuviae for all species in the A . platani group and for A . lesbia . Larvae and pupae of the latter species differ markedly from the A . platani group. Recorded parasitoids are listed. CO1 barcodes are provided for seven species. The groups are phylogenetically not very close; the monophyly of Acalyptris and the phylogeny on the basis of CO1 (mt-DNA) sequences are discussed.
TL;DR: Levels of sequence divergence among these three groups of Limoniastrum were greater than for other well supported genera in the family and, in combination with morphological differences and paucity of synapomorphies, led us to conclude that separate generic status for each of the three clades is warranted.
TL;DR: Thiobarbituric acid-reactive substances (TBARS) determination suggested that the lesser stressful state of L. monopetalum was related to higher metabolites accumulation and reducing capacity compared to L. guyonianum.
Abstract: We aim to highlight the differential antioxidant status of Limoniastrum guyonianum and Limoniastrum monopetalum in relation to their respective chemical and location characteristics. Metabolite analysis revealed similar contents in phenolic, flavonoids, sugars and chlorophyll in the two species’ leaves. Higher amounts of proline (Pro), carotenoids (Carot), sodium (Na) and potassium (K) were measured in L. monopetalum leaves relative to L. guyonianum ones. While the two Limoniastrum species have similar free radical DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging activity, L. guyonianum showed more than two-fold higher ferrous ions chelating activity relative to L. monopetalum. However, highest reducing power activity was observed in L. monopetalum. Thiobarbituric acid-reactive substances (TBARS) determination indicated that L. monopetalum behave better lipid membrane integrity relative to L. guyonianum. These findings suggested that the lesser stressful state of L. monopetalum was related to higher metabolites accumulation and reducing capacity compared to L. guyonianum.