Skip navigation.

rhs level 3 2011

Last post 23-01-2011 12:55 PM by La Jardinera Feliz. 3 replies.

Page 1 of 1 (4 items)

  • 22/01/2011 12:18 PM
    • moet32
    • 10 Aug 2008
    • 5
    Not Ranked
    Reply | Contact

    I am studying this course and would like some advice on 5.2 of the syllabus plant taxonomy structure and function. 5.2 Relate outdoor planting conditions to the efficiency of transpiration, respiration and photosynthesis Please can someone advise me on the main points relating to this section, thanks in advance steve

  • 23/01/2011 09:32 AM
    • kandeakay
    • west sussex
    • 03 Aug 2007
    • 137
    Top 75 Contributor
    Reply | Contact

    Good morning - I have been checking to see if anyone else would reply to your post, and as nothing has happened I will tell you what I think.  I have completed the Advanced cert and am halfway through the Diploma of the old syllabus.

    If the questions remain as difficult to decipher as always I would assume the examiner is looking for a description of how conditions such as waterlogging, shade, aspect, low nutrient, pH, sandy soil, temperature would affect the plant.

     Such as respiration - waterlogged conditions causing anaerobic respiration; high temps will cause high rate, shading the new planting will reduce, adequate solar radiation to ensure enough sugars are avbailable to convert to energy etc etc.....

     I hope you will get more input on this but that is my take on it.  Don't quote me!  I have my 3rd Dip exam (mod F) in Feb - all fingers crossed! 

     Good luck in your studies.

  • 23/01/2011 12:14 PM
    • moet32
    • 10 Aug 2008
    • 5
    Not Ranked
    Reply | Contact

    typical rhs wording questions and syllabus never clear good points thnaks

  • 23/01/2011 12:55 PM
    Top 150 Contributor
    Reply | Contact

    Hi Steve, Here's what I've got: Outdoor planting conditions Wind Windy conditions increase water loss in plants - so for a plant to photosynthesise efficiently, grow and settle in to a new site it needs to be protected with windbreak material or temporary shelter from drying winds which will increase water loss, cause stomata to close and reduce photosynthesis and consequently growth. Sun It is important to match the plant to the conditions in which it will thrive – hostas generally have thin large leaves designed for relatively low light levels and will scorch in full sunlight; purple-leaved and golden-leaved plants will lose their distinctive colour if planted in shade where light levels will be too low. Plants with silver reflective or hairy leaves are adapted to bright sunlight and use hairs to slow the diffusion pathway of moist air from the stomata. Water Few plants are adapted to waterlogged conditions – Cornus and Salix are examples of shrubs which can tolerate waterlogging for part of the year. Plants which have fully adapted to marginal conditions in ponds have aerenchyma, special cells which allow air to pass more freely though tissues from the parts of the plant which remain above the surface of the water. Good luck with the exams! I'm also doing level 3 in Feb.