نتایج جستجو برای: vascular bundles

تعداد نتایج: 238005  

2013
Ayşegül GÜVENÇ Maksut COŞKUN Okan ARIHAN

Microscopical properties of transverse sections from the cladodes of each taxa were illustrated and photographed. In the cross section, it was not possible to differentiated upper and lower epiderma of cladodes. In the mesophyll of cladodes palisade and spongy parenchyma are not seen. There are a few layers of parenchyma cells beneath the upper epidermis and above the lower epidermis. Cross sec...

Journal: :Journal of experimental botany 2004
Ewa Cholewa Marilyn Griffith

Eriophorum spp. are abundant perennial graminoids in the Arctic tundra and boreal peatlands. Because ecological studies indicated that some plants are unusually productive on infertile and cold sites, the anatomy of the overwintering corms of Eriophorum vaginatum (L.) and Eriophorum scheuchzeri (Hoppe) were examined to determine their involvement in nutrient uptake and storage. Components of th...

Zahra Amirian حامد اسحاقی سمیه کتابی

Connor et al. (2008) mention “specifying textual requirements of genres” (p.12) as one of the reasons which have motivated researchers in the analysis of writing. Members of each genre should be able to produce and retrieve these textual requirements appropriately to be considered communicatively proficient. One of the textual requirements of genres is regularities of specific forms and content...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2013
G Catian E Scremin-Dias

Nymphaea has seven species already catalogued in the flood prone areas of the Brazilian Pantanal. However, some species remain difficult to identify and descriptions of the anatomy of vegetative organs are an important tool for infrageneric separation to aid in group taxonomy. The species collected in the Pantanal and prepared according to the usual techniques for anatomical studies showed simi...

Mohammadraouf Moini Zahra sadat Jalali

There has been increasing interest in utilizing corpora in linguistic research and pedagogy in recent years. Rhetorical organization of different sections of research articles may appear similar in various disciplines, but close examination may show subtle differences nonetheless. One of the features that has been at the center of attention especially in recent years is the idiomaticity of a di...

Journal: :Plant physiology 1991
P T Tomlinson E R Duke K D Nolte K E Koch

Vascular bundles were isolated from grapefruit (Citrus paradisi Macf.) during periods of rapid sucrose translocation into fruit. Invertase and sucrose synthase activities were assayed in these strands and compared with immediately adjacent tissues (inner most peel and segment epidermis) and phloem-free juice sacs during four growing seasons. Although sucrose synthase was present in sink cells, ...

Journal: :journal of sciences, islamic republic of iran 2014
m. hashemi gahruei

nanocomposites made of carbon nanotube (cnt) bundles have attracted researchers’ attention due to their unusual properties such as: light weight, flexibility and stiffness.  in this paper, the effects of straight and rope-shaped bundles on nanocomposite effective mechanical properties are investigated.  first, fea models are created consisting of cnts with different shapes of straight and rope-...

Journal: :Plant signaling & behavior 2010
Jiabing Ji Josh Strable Rena Shimizu Daniel Koenig Neelima Sinha Michael J Scanlon

Plant shoot organs arise from initial cells that are recruited from meristematic tissues. Previous studies have shown that members of the WUSCHEL-related HOMEOBOX (WOX) gene family function to organize various initial cell populations during plant development. The function of the WOX4 gene is previously undescribed in any plant species. Comparative analyses of WOX4 transcription and function ar...

Journal: : 2022

Fruit anatomy is extremely important in terms of taxonomic studies the Apiaceae family. The genus Caropodium, whose position family has been revealed by recent studies, represented 5 taxa Türkiye. endemism rate was recorded as 60 %. In this study, fruit examined detail with sections taken from samples belonging to and evaluated both qualitative quantitative characteristics. general anatomical f...

Journal: :Proceedings. Biological sciences 2008
Markus Rüggeberg Thomas Speck Oskar Paris Catherine Lapierre Brigitte Pollet Gerald Koch Ingo Burgert

Palms can grow at sites exposed to high winds experiencing large dynamic wind and gust loads. Their stems represent a system of stiff fibrous elements embedded in the soft parenchymatous tissue. The proper design of the interface of the stiffening elements and the parenchyma is crucial for the functioning of the stem. The strategy of the palm to compromise between stiff fibre caps and the soft ...

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