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Chapters 23 - 26 - Plant Kingdom
Chapters 23 - 26 - Plant Kingdom

... • This is an example of cross-pollination as the pollen travels from one flower to a different flower. This is desirable in plants as it promotes variation. ...
cntctfrm_2ee0706d6a51a3c704661e25b559e5a7_hydrilla anatomy
cntctfrm_2ee0706d6a51a3c704661e25b559e5a7_hydrilla anatomy

... stomata. The cortex is wide, consists of two layers outer cortex (hypodermis) are compact cells with small intercellular space. The rest of the cortex has aerenchyma cells with large air cavities which are separated from one another by uniseriate layers of cells. All the cells of the cortex have num ...
Plant Structures: Stems - Colorado State University Extension
Plant Structures: Stems - Colorado State University Extension

... rapid, upright-growth, and poorly attached to the main limb. Suckers – Juvenile adventitious shoots arising from the roots, generally rapid, upright-growing. Canes – Stems with relatively large pith and usually living for only one to two years (roses, grapes, blackberries, and raspberries). ...
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... • In nonwoody plants, the dermal tissue system consists of the epidermis • A waxy coating called the cuticle helps prevent water loss from the epidermis • In woody plants, protective tissues called periderm replace the epidermis in older regions of stems and roots • Trichomes are outgrowths of the ...
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PLANTS

... • Root – help hold the plant in place and take in water and nutrients the plant needs. • Stem – supports or holds up the plant. • Flower – helps the plant reproduce. • Seeds – are made from flowers when plants ...
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Anticipated Problem: What are the main parts of a plant?

... Briefly talk with students about how humans use plants to protect the soil, provide fresh air, and create visual interest. Ask the students if they have thought about plant parts that they eat. As a class, brainstorm edible plant parts. List them either on the chalkboard or on an overhead transparen ...
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... shrubs (lose all leaves annually) - After leaves fall, have dormant axillary buds with leaf scars below ...
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... and AtPHB4 provoked an altered abundance of mitochondrial and stress-related transcripts. We propose that plant type-I PHBs take part in protein complexes that are necessary for proficient mitochondrial function or biogenesis, thereby supporting cell division and differentiation in apical tissues. K ...
Faulkner University Science Department
Faulkner University Science Department

... Vascular system, the xylem and phloem Rhizoids to roots and root systems Stems to trunks and shoots to shoot systems Leaves with waxy cuticles and stomata In the alternation of generations a shift toward diploid dominance from gametophyte to sporophyte Seeds and seed dispersion mechanisms Pollen and ...
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Flowers

... floral cup, that surrounds ovary but is free from it Epigynous—hypanthium is fused to ovary such that the sepals, petals, and stamens appear to be inserted in the top of the ovary ...
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Chapter 31 Plants

...  Lateral meristems are areas of active cell division that exist in two cylinders that extend along the length of roots and shoots. 1. Vascular cambium is a lateral meristem that lies between primary xylem and primary phloem. 2. Cork cambium is a lateral meristem that lies at the outer edge of the s ...
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Pinaceae (Pine Family)

...  Lives for multiple years  May or may not flower in any year ...
Leaves and Leaf Anatomy Leaf Theme Page Leaf Function: Leaves
Leaves and Leaf Anatomy Leaf Theme Page Leaf Function: Leaves

... entire - having a smooth edge with neither teeth nor lobes. epidermis - the protective, outler layer of cells on the surface of a leaf. The guard cells (and stoma) are part of the epidermis. The surface of many leaves is coated with a waxy cuticle which is secreted by the epidermis. guard cell - one ...
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Botanical Name: Agave `Blue Glow` Common Name: Blue Glow

... & form; in containers, masses, on slopes. Plant where leaves can be backlit by sun ...
Plant Reproduction - Doral Academy Preparatory
Plant Reproduction - Doral Academy Preparatory

... The life cycle of a fern is very different from the life cycle of many other plants. While many plants grow a mature adult form straight out of the seed, ferns have an intermediate stage, called a gametophyte, which then grows into a mature fern. ...
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Vegetables

... A vertical, unexpanded, underground stem is called a corm. A corm is solid inside (unlike a bulb) and doesn’t usually have nodes all over like a tuber. There is often a papery covering composed of leaf bases. Examples: water chestnut, taro. ...
Tuesday January 25, 2005 BIOL L100 Indiana University Southeast
Tuesday January 25, 2005 BIOL L100 Indiana University Southeast

... Stems for support and transport of food, water and minerals Vascular tissues for transport in some plants Most have seeds for reproduction Alternation of generations ...
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L.14.7

... Two cells located on each side of stomata Opens and closes stomata ...
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Bio stuff part 3

... ornamental plants, many food crops. Know traits of each! (Lab) & See left. 3 Plant organs: roots, stems, leaves (Lee also lab) 1. Roots: Root hairs-increase surface area of root for absorption Large taproots - store food such as starch for plant (Ex: carrots, turnips, sugar beets, sweet potatoes.) ...
Vegetative plant morphology - UNL, Go URL
Vegetative plant morphology - UNL, Go URL

... Crown is a region of compressed stem tissue from which new shoots are produced, generally found near the surface of the soil. Stolon (runner) is a specialized stem that grows horizontally above the soil surface and forms a new plant at one or more of its nodes. Examples include strawberry, buffalogr ...
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Guided Reading Activities

... Answer the following questions as you read modules 31.9–31.15: 1. True or false: The structural components of the flowers of angiosperms are actually modified leaves. If false, make it a correct statement. ...
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7A Booklet 2011

... Some plant cells have chloroplasts, but an animal cell hasn’t. ...
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Plant Hormones

... Gibberellins are an extensive chemical family with over 80 different gibberellin compounds in plants but only giberrellic acid (GA3) and GA4+7 are often used in plant tissue culture The main effect of gibberellins in plants is to cause stem elongation and flowering. They are also prominently involve ...
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table1

... To print this table please make sure you choose landscape in the print dialog box. ...
BOTANY (ENGLISH MEDIUM) 22KB 27.09.2016
BOTANY (ENGLISH MEDIUM) 22KB 27.09.2016

... Leaf. Functions, development, types of anatomical and morphological structure of dicot and monocot leaf blade. Specialized leaves. Generative organs of angiosperms. Flower, its structure and functions. Inflorescence, its structure and classification. Biology of reproduction. Fruits and seeds formati ...
< 1 ... 67 68 69 70 71 72 73 74 75 ... 133 >

Meristem



A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place.Meristematic cells give rise to various organs of the plant and keep the plant growing. The shoot apical meristem (SAM) gives rise to organs like the leaves and flowers, while the root apical meristem (RAM) provides the meristematic cells for the future root growth. SAM and RAM cells divide rapidly and are considered indeterminate, in that they do not possess any defined end status. In that sense, the meristematic cells are frequently compared to the stem cells in animals, which have an analogous behavior and function.The term meristem was first used in 1858 by Karl Wilhelm von Nägeli (1817–1891) in his book Beiträge zur Wissenschaftlichen Botanik. It is derived from the Greek word merizein (μερίζειν), meaning to divide, in recognition of its inherent function.In general, differentiated plant cells cannot divide or produce cells of a different type. Therefore, cell division in the meristem is required to provide new cells for expansion and differentiation of tissues and initiation of new organs, providing the basic structure of the plant body.Meristematic cells are incompletely or not at all differentiated, and are capable of continued cellular division (youthful). Furthermore, the cells are small and protoplasm fills the cell completely. The vacuoles are extremely small. The cytoplasm does not contain differentiated plastids (chloroplasts or chromoplasts), although they are present in rudimentary form (proplastids). Meristematic cells are packed closely together without intercellular cavities. The cell wall is a very thin primary cell wall.Maintenance of the cells requires a balance between two antagonistic processes: organ initiation and stem cell population renewal.Apical meristems are the completely undifferentiated (indeterminate) meristems in a plant. These differentiate into three kinds of primary meristems. The primary meristems in turn produce the two secondary meristem types. These secondary meristems are also known as lateral meristems because they are involved in lateral growth.At the meristem summit, there is a small group of slowly dividing cells, which is commonly called the central zone. Cells of this zone have a stem cell function and are essential for meristem maintenance. The proliferation and growth rates at the meristem summit usually differ considerably from those at the periphery.Meristems also are induced in the roots of legumes such as soybean, Lotus japonicus, pea, and Medicago truncatula after infection with soil bacteria commonly called Rhizobium. Cells of the inner or outer cortex in the so-called ""window of nodulation"" just behind the developing root tip are induced to divide. The critical signal substance is the lipo-oligosaccharide Nod-factor, decorated with side groups to allow specificity of interaction. The Nod factor receptor proteins NFR1 and NFR5 were cloned from several legumes including Lotus japonicus, Medicago truncatula and soybean (Glycine max). Regulation of nodule meristems utilizes long distance regulation commonly called ""Autoregulation of Nodulation"" (AON). This process involves a leaf-vascular tissue located LRR receptor kinases (LjHAR1, GmNARK and MtSUNN), CLE peptide signalling, and KAPP interaction, similar to that seen in the CLV1,2,3 system. LjKLAVIER also exhibits a nodule regulation phenotype though it is not yet known how this relates to the other AON receptor kinases.
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