Describe the structure of ligule

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WebThe maize ligule is an adaxial membranous structure on the leaf that develops at the boundary of the sheath and blade. The ligule and the associated auricle are dispensable structures, amenable to genetic manipulation. We present here a genetic analysis of liguleless1 (lg1) and liguleless2 (lg2), the two genes known to be uniquely necessary for ... WebJun 28, 2008 · Great variety in ligule abaxial surface anatomy was found but internally all ligules so studied possess a tripartite structure of two uniseriate epidermes enclosing a …

Structure and Function in the Grass Ligule: - JSTOR

WebJan 1, 1985 · Abstract. Aspects of the structure and ultrastructure of the membranous ligule of mature leaves of Lolium temulentum L. are described. In transverse section the ligule was lens-shaped and wedge-shaped in longitudinal section, 6 or 7 cells wide near the base and 1 or 2 cells wide at the edges. WebAug 14, 2024 · A prominent structure at the blade–sheath boundary of most grasses is the ligule, a flap of tissue that extends laterally from the adaxial surface. Ligule morphology varies across taxa, from membranous, to ciliate, to vascularized structures, and can range in size from reduced (a couple of millimeters) to extended (several centimeters ... green book connections uk

Lycophyte - Morphology and cytogenetics Britannica

WebThe ligule has a basal cup-shaped sheath with often casparian strips (e.g., S. kraussiana) and an adjacent hemispherical glossopodium (Greek glossa ‘tongue’ and podiun ‘foot’) … WebJun 28, 2008 · Structure and function in the grass ligule: mitochrondria and microfaodies in the ligule of Lolium temulentum L., an ultrastructural and cytochemical study. Journal of Experimental Botany. 36: WebAug 23, 2010 · The ligule is a membranous structure present on the adaxial leaf surface at its junction with the stem (Singh et al., 2010). This feature dates back to the middle Devonian homosporous lycopsids, e ... greenbook construction specifications

Selaginella: Habitat, Reproduction and Life Cycle - Biology …

Structure and function of the membranous grass ligule: a …

WebThe ligule of Selaginella kraussiana shows active incorporation of tritiated glucose in the central region; particularly into the Golgi system, but also into endoplasmic reticulum, mitochondria and cell periphery. Two hours chase in unlabelled glucose reveals a small amount of cell wall formation but most of the label remains in the Golgi bodies. WebDownload scientific diagram Illustration of barley leaf characteristics (A) Structure of a barley leaf, comprised of the sheath and blade, the ligule and auricles; the insertion angle at the ... green book constructionThe ligule is part of the leaf that is found at the junction of the blade and sheath of the leaf. It may take several forms, but it is commonly some form of translucent membrane or a fringe of hairs. The membranous ligule can be very short 1–2 mm (Kentucky bluegrass, Poa pratensis) to very long 10–20 mm (Johnson grass, Sorghum halepense), it can also be smooth on the edge or ve… flowers richmond

"WebDespite the fact that most reports describe the ligule as a thin, white or colourless, papery structure, such workers as Glück (1901) and Neumann (1938) stated that chlorophyll was present. Percival (1921) went further and claimed the presence of chloroplasts in some cells of the wheat ligule. There appear to be no transmission electron " - Describe the structure of ligule

Describe the structure of ligule

Ligule - an overview ScienceDirect Topics

WebInflorescence – The entire reproductive structure of a grass, sedge, or rush is called the inflorescence. Ligule – The ligule is where the blade and the sheath meet. The ligule … Webis that ligule is in many grasses (Poaceae) and some sedges (Cyperaceae), the membranous appendage or ring of hairs projecting from the inner side of a leaf at the …

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WebJan 15, 2013 · The ligule is an adaxial structure found at the blade-sheath boundary of most grass leaves. The main function of a ligule is to repel water from entering the space between the leaf sheath and stem, where axillary buds form. ... Here, we describe the characterization and cloning of the semi-dominant Liguleless narrow-Reference (Lgn-R) … WebAug 16, 2024 · The ligular region, between the maize blade and sheath, consists of the ligule and auricle and establishes leaf angle, which determines the plant’s overall architecture.Mutant studies in maize have identified genes essential for development of the ligular region (9–13).lg1 and lg2 mutants exhibit erect leaf architecture because of …

WebLigules are tiny appendages on the upper (adaxial) side of the leaf (both vegetative and reproductive), near the leaf base ( Figures 4.16, 4.18D,H, 4.19D ). The function of … WebAug 8, 2006 · They are described in detail, emphasizing interspecific differences and habitat-dependent variation of shape, length and prickle hair density. All ligules studied are membranous, without veins and...

Webligule: a variously modified extension of the sheath lying at the base of the blade; often a vertical membrane, and in certain cases, mere bristles. crown: basal zone of the shoot, the origin of which was tissue at the base of the … WebThe ligule was a characteristic feature of the extinct giant lycophytes such as Lepidodendron. quillwort Isoetes species have a plant body that is relatively small, consisting of a short compact axis (corm) and tufts of …

WebThe upper part of the ligule base is composed of very dense polygonal cells containing many ribosomes, endoplasmic reticulum (ER), and Golgi bodies. In S. pilifera, callose …

Webligule ( ˈlɪɡjuːl) or ligula n 1. (Botany) a membranous outgrowth at the junction between the leaf blade and sheath in many grasses and sedges 2. (Botany) a strap-shaped corolla, such as that of a ray floret in the daisy [C19: via French, from Latin ligula strap, variant of lingula, from lingua tongue] green book conditions of service annual leaveWebThe ligule ofSelaginella kraussiana shows active incorporation of tritiated glucose in the central region; particularly into the Golgi system, but also into endoplasmic reticulum, … green book contraindicationsWebJan 1, 2013 · Many key recognizing characters are present in the collar region, the junction of the leaf blade and leaf sheath, where the ligule resides. The paper aims to determine the type, shape, structure ... green book covid 19 chapter 14aWebThese observations suggest that common mechanisms are utilized to initiate leaves and branches are redeployed to regulate ligule and auricle development from leaf primordia. A major step in understanding morphogenesis of these structures requires knowing when and how the auricle forms relative to the ligule. flowers rigby idahoWebAug 24, 2024 · Ligules are classified, predominantly, on their position and morphology, which are still without a consensus as to their nature and diversity in an evolutionary context in Poaceae. green book continuous serviceWebA leaf with a pinnated pattern (like a feather) has a central vein running down the middle of the leaf with other veins branching off to either side of it. A leaf with a palmate pattern has veins branching out from a single one to form a shape resembling the palm of a hand. flowers richmond adelaideWebJun 28, 2008 · These authors have proposed three distinct definitions for ligules: (1) a subtype of stipule (Bischoff 1834;Regel 1843;Lubbock 1891Lubbock , 1895Arber 1925); … flowers rio grande city