Epidermal cells of lupine leaves, petioles and stems are the main storage site for quinolizidine alkaloids with an alkaloid content of 5—6 mg/g fw (= 15 — 25 mmol/kg). Epidermal tissue also store malate and hydrogen ions and show a vacuolar pH of < 5. It is argued that the specific storage of alkaloids in the vacuoles of epidermal cells might be due to active transport via carrier proteins and ...

at least on the lower surface, rarely glabrous; petioles ? ^ in. Bracteoles \ in., narrow?lanceolate, somewhat persistent. Panicles terminal, the racemes densely fulvous-villous, and congested. Ovary-sessile, young fulvous-villous. Calyx shortly constricted above the ovary then funnelshaped, hairy within and without; calyx-tube upwards 5-fluted, the segments triangular, acute, erect. Petals nar...

Sommera cusucoana Lorence, D. Kelly & A. Dietzsch, sp. nov., (Rubiaceae), a new species from Honduras, differs from the other Mesoamerican Sommera species by the combination of large, obovate leaves with long red petioles, glabrous or glabrate intervenal areas, red stipules, lax, sparsely pubescent inflorescences with red axes, flowers with red hypanthium and calyx, long fruiting pedicels, and ...

Papaya ringspot, caused by papaya ringspot virus, is the most important disease of the crop in Florida, severely limiting the potential for commercial production. Sometimes this virus infects cucurbits. Earliest symptoms in papaya appear as yellowing and vein-clearing of younger leaves. A prominent yellow mottling of the leaves follows. One or more lobes of infected leaves may become severely d...

Macrosolen bidoupensis Tagane & V.S.Dang, sp. nov. (Loranthaceae) is newly described from Bidoup Nui Ba National Park in Lam Dong Province, southern Vietnam. The new species is characterized by small broadly elliptic to circular leaves, sessile to short petioles, slightly cordate to rounded leaf bases, 4-5 pairs of lateral veins and a basally green corolla tube. An illustration, a summary of DN...

Petiole growth in Thlaspi arvense L. was stimulated when a basic 8 hour photoperiod (4.20 milliwatts per square centimeter) was extended with low intensity light (0.16 milliwatt per square centimeter) from incandescent lamps. The day length extension was effective only when the light contained high proportions of far red light. Exogenous gibberellin A3 (GA3) could partially substitute for the p...

Abstract Pyrenochaeta fraxinina was first described in 1913 from the state of New York (USA) on petioles Fraxinus sp. Since then, species has not been reported North America and reports other regions world are very sparse. The results this study P . based material collected various Poland 2012 to 2019. comprised 2700 previous year’s leaf excelsior 1970 or residues eight deciduous tree species. ...

abstract somatic embryogenesis is a new approach to in vitro plant propagation. this technique is based on stem cell obtain and its differentiation to a complete plant. this is affected by components of media culture. so, the effects of ms, b5 and nl media on carrot petiole somatic embryogenesis investigated via histological experiment. to do this, carrot petioles (with 1 cm dimension) cultured...