The plant Gossypium Hirsutum genotypes were grown in Qwshtapa district, Grdmala village, which is 30 kilometres from the centre of Erbil, Iraq. cotton there included Coker 310, Lachata (Iraqi genotypes), Cafko, Dunn 1047, Montana, Stone Ville (USA Bakhtegon, Khdorda, and Vanamin (Iranian genotypes). anatomical investigation demonstrates distinct petioles, midribs, laminas, margin outline shapes...

symptoms of the leaf scorch disease on the leaves of oleander infected by xylella fastidiosa appearing for the first time in lebanon were confirmed by elisa tests and anatomical observations of sections of petioles by a scanning electron microscope. xylella fastidiosa was detected in the xylem forming bacterial aggregates in the lumen of tracheary elements. the bacterium colonizes and invades t...

Beta vulgaris belongs to the family Amaranthaceae and was found to have halophytic ancestors. The objective of this study was to investigate the effect of sodium chloride on seed germination, therefore the early stages of seedling growth of Beta vulgaris grown under different salinity levels (0, 100, 150 and 200 mM of NaCl) were studied. The experiment was laid out in a completely randomized de...

Extended x-ray absorption fine structure measurements were performed on frozen hydrated samples of the cadmium (Cd)/zinc (Zn) hyperaccumulator Thlaspi caerulescens (Ganges ecotype) after 6 months of Zn(2+) treatment with and without addition of Cd(2+). Ligands depended on the metal and the function and age of the plant tissue. In mature and senescent leaves, oxygen ligands dominated. This resul...

Xylella fastidiosa (Xf) is a xylem-limited bacterial pathogen that causes leaf scorch symptoms in numerous plant species in urban, agricultural, and natural ecosystems worldwide. The exact mechanism of hydraulic disruption and systemic colonization of xylem by Xf remains elusive across all host plants. To understand both processes better, the functional and structural characteristics of xylem i...

BACKGROUND Ascorbic acid (AsA) is a unique antioxidant as well as an enzyme cofactor. Although it has multiple roles in plants, it is unclear how its accumulation is controlled at the expression level, especially in sink tissues. Kiwifruit (Actinidia) is well-known for its high ascorbate content. Our objective was to determine whether AsA accumulates in the fruits primarily through biosynthesis...

Hoya longlingensis (E.F. Huang) and H. sichuanensis E.F. Huang are two new species of Apocynaceae from Southwestern China that described in this study. Morphologically, the resemble tamdaoensis Rodda & T.B. Tran lyi Lév., respectively. However, differs by its elliptic leaves, mid-vein leaf blades raised adaxially depressed abaxially, lateral veins 2–4-paired, corolla yellow-green, outer ang...

The new subspecies Pedicularis rostratospicata subsp. marsica is here described based on morphological and molecular analyses. taxon endemic to few localities of the Central Apennines within Abruzzo, Lazio Molise National Park (Central Italy). can be distinguished from other two currently accepted (subsp. helvetica) by their taller stems, shorter petioles basal middle leaves, narrower blades lo...

Aleurodiscus sagittisporus sp. nov. is described and illustrated. This species characterized by producing basidiomata with a monomitic hyphal system, clampless-septate hyphae, arrowhead-shaped, amyloid, finely verrucose basidiospores, gloeocystidia, dendrohyphidium-like branched paraphysoid variously shaped swelling cells in the hymenium. Phylogenetic analyses based on nuclear rDNA LSU ITS sequ...