نتایج جستجو برای: petiole
تعداد نتایج: 1212 فیلتر نتایج به سال:
ABSTRACT The development of Pyrenopeziza brassicae (light leaf spot) apothecia was studied on petiole debris from artificially infected oilseed rape leaves incubated at temperatures from 6 to 22 degrees C under different wetness regimes and in 16 h light/8 h dark or continuous darkness. There was no significant difference between light treatments in numbers of apothecia that developed. Mature a...
A new collection of 24 wingless ant specimens from mid-Cretaceous Burmese amber (Albian-Cenomanian, 99 Ma) comprises nine new species belonging to the genus Sphecomyrmodes Engel and Grimaldi. Described taxa vary considerably with regard to total size, head and body proportion, cuticular sculpturing, and petiole structure while all species are unified by a distinct shared character. The assembla...
HIGHLIGHTS Bauhinia monandra leaf is mesomorphous to xeromorphous. It has glandular navicular and uniseriate nonglandular trichomes. The petiole differential anatomical characteristics within the genus. pulvinus motile cushion have live pectic septate fibres.
Stein, W.E. and Beck, C.B., 1992. New information on Bostonia pepTh'xa a n unusual member of the Calamopityaceae from North America. Rev. Palaeobot. Palynol., 72:73 102. A calamopityacean axis exhibiting multiple segments of primary xylem surrounded by secondary vascular tissue is analyzed here for its morphological and systematic significance. The plant is fundamentally protostelic with a deep...
ABSTRACT: This study evaluated the levels of heavy metals in soil and castor bean plant after fertilization with sewage sludge (SS) subjected to different stabilization processes. The was conducted a Haplic Cambisol following treatments: control (CO), solarized (SSS), composted (CSS), vermi (VSS), limed (LSS), mineral fertilizer (MF). experimental design included subdivided plot scheme being pr...
This study was accomplished with the aim of investigating the effects of tree decline and slope aspect on leaf morphological traits and determining the indicator morphological traits that indicate the leaf diversity of Persian oak trees in relation to habitat conditions and environmental stresses in Mellah Siah forests of Ilam. Two forest habitats were selected on the northern and southern slop...
The transport of water, sugar, and nutrients in trees is restricted to specific vascular pathways, and thus organs may be relatively isolated from one another (i.e. sectored). Strongly sectored leaf-to-leaf pathways have been shown for the transport of sugar and signal molecules within a shoot, but not previously for water transport. The hydraulic sectoriality of leaf-to-leaf pathways was deter...
The intensity and quality (red to far-red (R/Fr) ratio) of light directly affect growth of plant under shading. Gibberellins (GAs) and auxin [indole-3-acetic acid (IAA)] play important roles in mediating the shading adaptive responses of plants. Thus, the intensity and quality of the uncoupling light from shading were assessed to identify the influence of each component on the morphology and ma...
The relationships between (1) leaf biomass and morphology (lamina area and petiole and lamina inclination), (2) petiole’s mechanical and structural properties, and (3) the vertical light gradient inside the crop’s canopy were studied in field grown sunflower (Helianthus annuus L.) plants, maintained at optimum soil water and mineral levels. At flowering, incident photosynthetic active radiation...
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