Abstract Drought stress is one of the most severe abiotic stresses affecting adversely plant growth, crop production, and various metabolic processes. Using seaweed extract in mitigating water adverse effects highly important for production. The present study discussed physiological role ( Sargassum denticulatum ) improving wheat tolerance to stress. Water (40% field capacity) caused significan...

Variability in the group of Lomatium species comprising L. nevadense, L. ravenii, and L. foeniculaceum has led to conflicting classification schemes. While some taxonomists have treated L. ravenii as a distinct species made up of all the populations from California, Nevada, Idaho, and Oregon, others considered L. ravenii to be nothing more than a morphological extreme of L. nevadense. We examin...

Khoshsokhan, M., Kazempour Osaloo, S., Saadatmand, S. & Attar, F. 2010 06 30: Molecular phylogeny of Rochelia (Boraginaceae) based on nrDNA ITS and cpDNA trnL-F sequences. -Iran. J. Bot. 16 (1): 22-29. Tehran. We here present molecular phylogeny of the genus Rochelia (Boraginaceae-Eritrichieae). A total of 8 species of Rochelia and 2 species of Lappula as outgroups were included in analyses usi...

Three plastid regions, matK, rpl32-trnL and rpl16 intron and the ITS1-5.8S-ITS2 nuclear ribosomal DNA were used to demonstrate a phylogenetic placement of the genus Hederorkis (Orchidaceae) for the first time. The taxonomic position of this genus has been unclear thus far. The phylogenetic and morphological relations of Hederorkis to the most closely related genera Sirhookera, Adrorhizon, Bromh...

The effects of rapid, recent uplift of the Hengduan Mountains on evolution and diversification of young floristic lineages still remain unclear. Here, we investigate diversification of three closely related Saxifraga species with a distribution restricted to the Hengduan Mountains (HM) and southern Tibet, and comment on their taxonomy based on molecular evidence. Three chloroplast DNA fragments...

The identity of Ceropegia hirsuta in Thailand has been questioned. Although this plant is quite similar to the original C. from India, being entirely hirsute, with yellowish-shaded flowers, a curved, funnel-shaped corolla tube, and broad lobes shorter than there are several clear differences morphological traits between materials collected type further specimens India. Moreover, s.s. restricted...

Biscutella raphanifolia is a species distributed in N Algeria and Tunisia, characterized by the presence of large, lyrate basal leaves, amplexicaul cauline leaves, and paniculate-branched inflorescences. It has been traditionally considered the only perennial taxon from B. sect. Biscutella, lifespan being the strongest argument used to differentiate B. raphanifolia from other annual taxa such a...

Although consensus has now been reached on a general two-locus DNA barcode for land plants, the selected combination of markers (rbcL + matK) is not applicable for ferns at the moment. Yet especially for ferns, DNA barcoding is potentially of great value since fern gametophytes--while playing an essential role in fern colonization and reproduction--generally lack the morphological complexity fo...