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  • leaf
  • They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence. (wikipedia.org)
  • The miniature plant inside often has either one seed leaf or a pair of seed leaves. (maximumyield.com)
  • Along with the seed leaf (or leaves), the miniature plant inside the seed shell also usually has a pair of growing tips (apical meristems), one at the top of the stem (hypocotyl) that develops into the first true leaves at the top of the sprout, and one at the tip of the root (radicle) used for root development. (maximumyield.com)
  • In a nutshell (pun intended), a seed coat protects a tiny plant that already has a root, stem and a leaf or two. (maximumyield.com)
  • The cells can be recognized in early developmental stages of leaf primordia in the axils. (plantphysiol.org)
  • About 10 centimeters or less above the cotyledons, the first true leaves arise, a pair of oppositely oriented single leaflets each with a distinct petiole (leaf stem) rotated one-quarter turn from the cotyledons. (growinghelp.com)
  • The first sign of flowering in Cannabis is the appearance of undifferentiated flower primordia along the main stem at the nodes (intersections) of the petiole, behind the stipule (leaf spur). (growinghelp.com)
  • At the top of a flowering plant, this number again diminishes to a single leaflet per leaf. (wikipedia.org)
  • The lower leaf pairs usually occur in an opposite leaf arrangement and the upper leaf pairs in an alternate arrangement on the main stem of a mature plant. (wikipedia.org)
  • The leaves have a peculiar and diagnostic venation pattern that enables persons poorly familiar with the plant to distinguish a cannabis leaf from unrelated species that have confusingly similar leaves (see illustration). (wikipedia.org)
  • Tiny samples of Cannabis plants also can be identified with precision by microscopic examination of leaf cells and similar features, but that requires special expertise and equipment. (wikipedia.org)
  • One characteristic symptom is abnormal floral organ development including phyllody, (i.e., the production of leaf-like structures in place of flowers) and virescence (i.e., the development of green flowers attributable to a loss of pigment by petal cells). (wikipedia.org)
  • A phytoplasma infection often triggers leaf yellowing, probably due to the presence of phytoplasma cells in phloem, which can affect phloem function and carbohydrate transport, inhibit chlorophyll biosynthesis, and trigger chlorophyll breakdown. (wikipedia.org)
  • tissues
  • While gibberellins are found throughout the entire anatomy of a plant, they are synthesized in certain organelles and transported via the vascular tissues to where they are needed. (maximumyield.com)
  • The vascular tissues in the more advanced ferns and "fern allies" are made up of xylem and phloem, which conduct water, nutrients, and food throughout the plant body. (tulane.edu)
  • Mosses and liverworts are lumped together as bryophytes , plants lacking true vascular tissues, and sharing a number of other primitive traits. (tulane.edu)
  • mosses and liverworts
  • Primitive bryophytes like mosses and liverworts are so small that they can rely on diffusion to move water in and out of the plant. (tulane.edu)
  • Included here are: phycology (algae), pteridology (ferns), bryology (mosses and liverworts) and palaeobotany (fossil plants) and their histories are treated elsewhere (see side bar). (wikipedia.org)
  • tissue
  • When the top of a plant is removed known as ' topping ' the plant will produce Auxins to repair the plant tissue that has been removed. (konoplja.org)
  • In most plants little to no shoot tissue results from embryogenesis: essentially the entire shoot system of plants derives from postembryonic development in the SAM. (iastate.edu)
  • Phytoplasmas are obligate bacterial parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission. (wikipedia.org)
  • In 1967, phytoplasmas were discovered in ultrathin sections of plant phloem tissue and were termed mycoplasma-like organisms (MLOs) due to their physiological resemblance The organisms were renamed phytoplasmas in 1994, at the 10th Congress of the International Organization for Mycoplasmology. (wikipedia.org)
  • roots
  • Auxins are also responsible for producing adventitious roots from cuttings. (konoplja.org)
  • The roots actually produce quite large amounts just before flowering, to allow blooming to commence as strongly as possible. (konoplja.org)
  • Essential gibberellins activity is found in the primary and secondary meristems-both in shoots and roots-where undifferentiated stem cells are influenced to produce. (maximumyield.com)
  • As soon a plant sprouts it makes roots then try to producing more roots to acquire water/nutes. (icmag.com)
  • If the plant is forming roots, more root growth will occur. (icmag.com)
  • They also lack true stems, roots, or leaves, though they have cells that perform these general functions. (tulane.edu)
  • germination
  • Grubbycup has the details on why meristems are so important throughout the life cycle of the plant, from germination to flowering. (maximumyield.com)
  • These natural hormone compounds are essential to: plant cell enlargement and division - germination - root development - flowering and seed formation. (icmag.com)
  • temperate
  • Although a plant of the tropics, most cultivars have been developed in temperate climates and are easy to grow in most countries of the world as long as they receive at least 6-8 hours average sunlight during the summer, and are moved to a warm location for the winter. (blogspot.no)
  • 10,000 years ago
  • The first written records of plants were made in the Neolithic Revolution about 10,000 years ago as writing was developed in the settled agricultural communities where plants and animals were first domesticated. (wikipedia.org)
  • hormone
  • This hormone most commonly found in seaweed plays a big part in the entire development of the plant. (konoplja.org)
  • If a plant is under a canopy and not getting enough light, production of this hormone initiates so the plant can stretch towards the light. (maximumyield.com)
  • The effects of a hormone on a plant often depend on the stage of the plant's development. (icmag.com)
  • If you apply a hormone to a plant, the result will be stimulated growth of the type which the plant is currently under going. (icmag.com)
  • This causes the pineal gland to stop producing the hormone melatonin , which makes you wake up. (getrevising.co.uk)
  • shoot
  • It is the acid ' Indole-3-Acetic Acid ( IAA ) and is produced in shoot tips, seedlings and developing flower sets. (konoplja.org)
  • They play a role in nutrient uptake as they promote new shoot growth and flower sites, and they also play smaller roles in all phases of plant growth and development. (maximumyield.com)
  • The shoot system has an important role in generating a large variety of diverse plant forms ( Steeves and Sussex, 1989 ). (plantphysiol.org)
  • Plant architecture is further modified by shoot branching that results from the activity of the additional meristems. (plantphysiol.org)
  • This review focuses on recent findings uncovered by physiological, genetic, and molecular studies and approaches to investigate the control of shoot branching, apical dominance, and dormancy in plants. (plantphysiol.org)
  • Thus primary shoot growth involves the repetitive addition of stem segments and associated leaves to the end of the shoot. (iastate.edu)
  • monoecious
  • Although monoecious plants are often referred to as "hermaphrodites", true hermaphrodites (which are less common) bear staminate and pistillate structures together on individual flowers, whereas monoecious plants bear male and female flowers at different locations on the same plant. (wikipedia.org)
  • normally
  • Phytoplasmas are characterized by the lack of a cell wall, a pleiomorphic or filamentous shape, a diameter normally less than 1 μm, and a very small genome. (wikipedia.org)
  • They are transmitted from plant to plant by vectors (normally sap-sucking insects such as leafhoppers) in which they both survive and replicate. (wikipedia.org)
  • undergoes
  • TENGU undergoes proteolytic processing by a plant serine protease in vivo, suggesting that the N-terminal peptide (i.e., the 11 amino acid fragment) alone induces the observed symptoms. (wikipedia.org)
  • rudimentary
  • Rudimentary botanical science began with empirically-based plant lore passed from generation to generation in the oral traditions of paleolithic hunter-gatherers. (wikipedia.org)
  • zones
  • GUS fusion genes showed differential expression of AtCKX genes during plant development, the activity being confined predominantly to zones of active growth. (plantcell.org)
  • domestication
  • With these communities came the development of the technology and skills needed for the domestication of plants and animals and the emergence of the written word provided evidence for the passing of systematic knowledge and culture from one generation to the next. (wikipedia.org)
  • Dolores Piperno, The Origins of Plant Cultivation and Domestication in the New World Tropics: Patterns, Process, and New Developments [page needed] Since then, even earlier dates have been published. (wikipedia.org)
  • Before domestication, maize plants grew only small, 25 millimetres (1 in) long corn cobs, and only one per plant. (wikipedia.org)
  • species
  • The developmental program that specifies branching patterns in different plant species is fundamentally important for generating species-specific plant forms. (plantphysiol.org)
  • Canna (or canna lily, although not a true lily) is a genus of 19 species of flowering plants. (blogspot.no)
  • The species have large, attractive foliage, and horticulturists have turned it into a large-flowered and bright garden plant. (blogspot.no)
  • Hibiscus rosa-sinensis , known colloquially as Chinese hibiscus, China rose, Hawaiian hibiscus, and shoe flower, is a species of flowering plant in the Hibisceae tribe of the family Malvaceae , native to East Asia. (blogspot.no)
  • Indigofera is a large genus of over 750 species of flowering plants belonging to the family Fabaceae . (blogspot.no)
  • Phytoplasmas can infect and cause various symptoms in more than 700 plant species. (wikipedia.org)
  • leafy
  • The leafy green plant that we see when we look at a moss or a liverwort is really the gametophyte , which is the dominant stage in all bryophytes. (tulane.edu)
  • development
  • Inside each protective casing is a tiny plant held in stasis until it is exposed to conditions that initiate development and growth, along with some stored energy (endosperm) for the plant to get started with. (maximumyield.com)
  • The metabolism of the plant is slowed dramatically, and dehydration stalls development. (maximumyield.com)
  • Intracellular regulation of growth and development is connected mainly to the plant genetical studies. (tankonyvtar.hu)
  • The regulation of plant development by light, or photomorphogenesis , is a central theme in plant development. (tankonyvtar.hu)
  • Plant growth and development involves the integration of many environmental and endogenous signals that, together with the intrinsic genetic program, determine plant form. (icmag.com)
  • The history of botany examines the human effort to understand life on Earth by tracing the historical development of the discipline of botany-that part of natural science dealing with organisms traditionally treated as plants. (wikipedia.org)
  • In Spielvogel's view, many centuries of artificial selection (rather than the current view that maize was exploited by interplanting with teosinte) by the indigenous people of the Americas resulted in the development of maize plants capable of growing several cobs per plant, which were usually several centimetres/inches long each. (wikipedia.org)
  • Surprisingly, the N-terminal 11 amino acid region of the mature protein triggers symptom development in Nicotiana benthamiana plants. (wikipedia.org)
  • sperm
  • Gametophytes produce gametes (sperm and eggs) in a special structure called a gametangium (-ia), while sporophytes produce spores in a special structure called a sporangium (-ia). (tulane.edu)
  • Sperm are produced within each antheridium , and an egg in each archegonium . (tulane.edu)
  • The sperm swims to the archegonia through a thin film of water, drawn by a chemical attractant produced by the female plant, then swims down the neck of the archegonia to the egg. (tulane.edu)
  • Auxins
  • Auxins used in early grow, promote adventurous rooting, help relieve plant stress, and promote plant health/vigor. (icmag.com)
  • Zoology
  • Medieval Latin botanicus - herb, plant) and zoology are, historically, the core disciplines of biology whose history is closely associated with the natural sciences chemistry, physics and geology. (wikipedia.org)
  • compounds
  • Heterotroph - live on compounds produced by other organisms - humans, cows, meerkats etc. (brainscape.com)
  • Various compounds, including hashish and hash oil, are extracted from the plant. (wikipedia.org)
  • Cannabinoids, terpenoids, and other compounds are secreted by glandular trichomes that occur most abundantly on the floral calyxes and bracts of female plants. (wikipedia.org)
  • primarily
  • The tunica consists usually of 2 cell layers (often only 1 in monocots) where cell division occurs primarily in the anticlinal plane (perpendicular to the surface). (iastate.edu)