Abscission and Commercial hormones - Groby Bio Page

Abscission and Commercial hormones - Groby Bio Page

Abscission and Commercial hormones Spec Learning Outcomes

Describe how plant hormones are used commercially. Starter: Uses of plant hormones What are the commercial uses of the hormones?

Why are they of benefit? Commercial use of Auxins Sprayed

onto developing fruits to prevent abscission Sprayed onto flowers to initiate fruit growth without fertilisation Parthenocarpy Applied

promotes the growth of seedless fruits to the cut end of a shoot to stimulate root production Synthetic auxins are used as selective herbicides Commercial use of Ethene

Fruits harvested before they are ripe allows them to be transported without deteriorating, these are sprayed with ethene to promote ripening at the sale point.

E.g. bananas from the Caribbean Commercial use of Gibberellin Sprayed onto fruit crops to promote growth Sprayed

onto citrus trees to allow fruit to stay on the trees longer Sprayed onto sugar cane to increase the yield of

sucrose Used in brewing, where GA is sprayed onto barley seeds to make them germinate, amylase is produced, starch is broken down into maltose, the action of yeast on the maltose produces alcohol.

Commercial use of cytokinins Delay leaf senescence can be sprayed on lettuce leaves to prevent them from yellowing Can

be used in tissue culture to mass produce plants PPQ [6] The orange tree, Citrus sinensis, is another important crop plant. Scientists applied the following treatments to commercial orange trees:

Gibberellins were applied at various stages of development. Auxins were applied during development and to mature orange trees. The treated orange trees were compared to untreated orange trees. Scientists observed that the treated trees: had slightly shorter roots

grew taller all began to grow within two days of each other

had fewer and shorter side branches retained their fruit and leaves for longer.

Suggest explanations for each of these observations. [6] Markscheme PPQ [3] Markscheme

PPQ [1] Markscheme PPQ [1] Markscheme A

PPQ [3] Markscheme

Recently Viewed Presentations

  • Les Verbes en -ER

    Les Verbes en -ER

    To conjugate -RIR verbs: Take off the final -IR to get your verb stem Ex. Offrir - IR = offr Add your -ER verb endings Ex. Offr + e, es, e, ons, ez, ent Les Verbes en -RIR Couvrir Découvrir...
  • Fourth Grade Back to School Night

    Fourth Grade Back to School Night

    Student Expectations in the Classroom. We are now following our new Westchester pledge , S.O.A.R to success! Safe, Organized, Accountable and Responsible!. We will still be using the stop light behavior system in the classroom, but we will be making...
  • CS Rote's resume

    CS Rote's resume

    Real Presence: The Holy Spirit in the Works of C. S. Lewis Contents I. C. S. Lewis on the cover of Time Magazine 8 September, 1947 2 II. A composite review from several readers on Amazon.com 3
  • TOGAF EA Capability Map - Sparx Systems

    TOGAF EA Capability Map - Sparx Systems

    TOGAF and ArchiMate at The Open Group. Eclipse Process Framework (EPF) at the Eclipse Foundation. Business partners with Sparx, HP, and IBM. NIEM History. National Information Exchange Model (NIEM) was initiated in 2005 by U.S. Department of Justice (DOJ) and...
  • Project: Desensitization of glutamate receptors at the larval

    Project: Desensitization of glutamate receptors at the larval

    Life Cycle Of Drosophila. 1 day. 1 day. 2 day. 1 day. With the CNS intact motor nerves are active. Minis at fly NMJ. Stimulate motor nerve with electrode. ... Crayfish NMJ (Excitatory "E" as well as inhibitory "I" motor...
  • Brazil Office - eventos.cnseg.org.br

    Brazil Office - eventos.cnseg.org.br

    IFRS 17 & Solvency II Workshop. July, 2019. Ronald Poon Affat . FSA FIA MAAA CFA. Brazil CEO. To change photo: Delete the current image. This will leave a blank placeholder with a picture icon.
  • Strategies for Facilitating Outpatient Attendance of AA

    Strategies for Facilitating Outpatient Attendance of AA

    Individuals forced to attend AA, often by the judicial system, may find AA difficult to accept and, because coerced attendance is a violation of the membership requirement of "a desire to stop drinking" (Twelve Steps & Twelve Traditions, 1952), such...
  • Ch 10c: Unsupervised Learning

    Ch 10c: Unsupervised Learning

    Web pages: Roughly 108-dimensional space where each dimension corresponds to one word. Rather use vectors to deal with only the words actually present in documents a and b. Character strings, such as DNA sequences: Rather use a metric based on...