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bacoco coco

Essential Plant Nutrients - 0 views

www.cartage.org.lb/...EssentialPlant.htm

Plant nutrients

shared by bacoco coco on 09 Apr 10 - Cached
  • Plants require 13 mineral nutrient elements for growth
  • Macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium and sulfur) are plant nutrients required in the largest amount in plants. Micronutrients (iron, copper, manganese, zinc, boron, molybdenum and chlorine) are required in relatively smaller amounts. Additional mineral nutrient elements which are beneficial to plants but not necessarily essential include sodium, cobalt, vanadium, nickel, selenium, aluminum and silicon
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Nutrients (in the soid) are needed either in large amounts (macronutrients), medium amounts (micronutrients), or in trace amounts
  • ...5 more annotations...
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Plants can be damaged is there is too much of one nutrient (toxicity) or not enough of a nutrient (deficiency).
  • Five types of deficiency or toxicity symptoms are observed:
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Here are the visible signs if the soil does not have enough of or too much of a nutrient.
  • A nutrient deficiency occurs when the nutrient is not in sufficient quantity to meet the needs of the growing plant. Nutrient toxicity occurs when a plant nutrient is in excess and decreases plant growth or quality
  • Essential plant nutrients: their relative amounts in plants, functions and classification
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      This table may be helpful in determining a topic for an experiment. You would only want to choose one nutrient with which to run an experiment.
  • Table 2. Generalized Symptoms of Plant Nutrient Deficiency or Excess
Pascale Michelon

Plant hormone and growth regulators - 3 views

extension.oregonstate.edu/...hormones.html

plant hormones

shared by Pascale Michelon on 11 Apr 10 - Cached
  • (Table 5)
  • Hormones are produced naturally by plants, while plant growth regulators are applied to plants by humans
    • Pascale Michelon
      Pascale Michelon on 11 Apr 10
       
      This is interesting because it shows you that if you want to manipulate hormones in an experiment you can use plant growth regulators to mimic the action of hormones.
  • ...3 more annotations...
  • There are five groups of plant-growth-regulating compounds: auxin, gibberellin (GA), cytokinin, ethylene, and abscisic acid (ABA).
  • Ethylene is unique in that it is found only in the gaseous form. It
  • induces ripening, causes leaves to droop (epinasty) and drop (abscission), and promotes senescence.
    • Pascale Michelon
      Pascale Michelon on 11 Apr 10
       
      The effects of ethylene (promotion of both aging/death and ripening) may explain why just one bad apple in a basket may spoil the whole bunch.
  • Pascale Michelon on 11 Apr 10
     
    Plant hormones and growth regulators are chemicals that affect flowering; aging; root growth; killing of leaves; prevention or promotion of stem elongation; color enhancement of fruit; prevention of leafing and/or leaf fall; etc.
Laura Bradford

AccessScience | Encyclopedia Article | Soil fertility - 3 views

www.accessscience.com/content.aspx

l bradford

shared by Laura Bradford on 09 Apr 10 - Cached
  • Sixteen chemical elements are required for the growth of all plants: carbon, oxygen, and hydrogen (these three are obtained from carbon dioxide and water), plus nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, and chlorine. Some plant species also require one or more of the elements cobalt, sodium, vanadium, and silicon.
  • 13 essential mineral nutrien
  • J. R. Brown (ed.), Recommended Chemical Soil Test Procedures for the North Central Region, Missouri Agricultural Experiment Station, Columbia, 1998
    • Laura Bradford
      Laura Bradford on 09 Apr 10
       
      The article highlighted is worth looking up. Contains information on experimental procedures and how to handle your soil samples.
  • Laura Bradford on 09 Apr 10
     
    Soil Fertility: How is this important to growth of a plant?
Natalie Singer

Soil pH topic - 0 views

galenet.galegroup.com/...SciRC

my topic link nsinger

shared by Natalie Singer on 13 Apr 10 - Cached
  • Natalie Singer on 13 Apr 10
     
    shows why levels of pH in soil are important which shows what plants are good for what soil. pH levels affect plant growth.
Andrew Schaberg

AccessScience | Encyclopedia Article | Soil fertility - 0 views

www.accessscience.com/content.aspx

shared by Andrew Schaberg on 13 Apr 10 - Cached
  • Sixteen chemical elements are required for the growth of all plants: carbon, oxygen, and hydrogen (these three are obtained from carbon dioxide and water), plus nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, and chlorine.
  • Fertility levels can vary from a deficiency to a sufficiency, or even toxicity (too much), of one or more nutrients.
  • soil considered fertile in all other ways could have levels of available potassium too low for optimum plant growth
  • ...1 more annotation...
  • The type of crop grown on a particular soil determines the required soil fertility level.
  • Andrew Schaberg on 13 Apr 10
     
    soil fertility
Sarah Tolch

AccessScience | Research Update | Phototropin - 0 views

www.accessscience.com/content.aspx

shared by Sarah Tolch on 09 Apr 10 - Cached
  • Typically, stems show positive phototropism (movement toward the light), whereas roots exhibit negative phototropic movement (away from the source of light).
  • Arabidopsis contains two phototropins referred to as phot1 and phot2. Mutants of Arabidopsis lacking both phototropins lose their phototropic responsiveness
  • Phototropic response
  • ...10 more annotations...
  • phototropins control the movement of chloroplasts
  • these responses serve to enhance the photosynthetic
  • Phototropins, like photoreceptor pigments associated with mammalian vision, comprise many amino acids (900–1000) that form the main structure of the protein (the apoprotein) to which an accessory chemical cofactor is bound that can absorb light and impart color (the chromophore)
  • a small fraction of the receptor pool is rapidly internalized (within minutes) upon blue light irradiation
  • Phototropins are typically associated with the plasma membrane
  • However, the biological significance
  • As light passes through the stem, it becomes progressively diffracted, thereby generating a gradient of phototropin activation across the organ, with the highest level of activity occurring on the irradiated side
  • In some plant species, including the fern Adiantum capillus-veneris, phototropism and chloroplast movement are induced by red light as well as blue.
  • novel
  • The presence of such a hybrid photoreceptor is proposed to enhance light sensitivity and aid the prevalence of species such as ferns in low light conditions
Lunsford Schock Schock

The Affects of Red Bull on the Body - 0 views

findarticles.com/...ai_80309795

shared by Lunsford Schock Schock on 14 Apr 10 - Cached
  • Lunsford Schock Schock on 14 Apr 10
     
    This describes the effects of Red Bull on the human body. I want to find out if the effects are the same on plants.
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