1
   

Do plant roots always grow downward?

 
 
llmtony
 
Reply Sun 5 Mar, 2006 05:08 pm
Hi,
I need help with my science project. For my research paper I must have a primary resource (or a person) that has educational knowledge on my topic. My topic is plant growth, and for whoever can help me with this, please get back to me. These are the questions that I would like for you to answer.

Do plant roots always grow downward?

Why do plant roots grow in this direction?

and...

Why do plant roots grow for this reason?

Thank you very much. Please get back to me as soon as possible because, my research paper is due this tuesday.

Thank you.
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Discussion • Score: 1 • Views: 18,447 • Replies: 11
No top replies

 
spendius
 
  1  
Reply Sun 5 Mar, 2006 06:03 pm
Quote:
Do plant roots always grow downward?


Yes.

Quote:
Why do plant roots grow in this direction?


It's where the nutrient is.

Quote:
Why do plant roots grow for this reason?


Because plants are amoral.
0 Replies
 
raprap
 
  1  
Reply Sun 5 Mar, 2006 07:23 pm
Spanish Moss has no roots. It is able absorb moisture and nutrients directly from the atmosphere. It is not a moss, and is related to the pineapple. Although it grows on trees in eastern carolinas-it is not a parasite, other than using the trees for support.

Rap
0 Replies
 
dadpad
 
  1  
Reply Sun 5 Mar, 2006 08:23 pm
spendius wrote:
Quote:
Do plant roots always grow downward?


Yes.

Quote:
Why do plant roots grow in this direction?


It's where the nutrient is.

Quote:
Why do plant roots grow for this reason?


Because plants are amoral.



An example of tree roots not growing downward is J rooted seedlings.
This is generally caused by an over or under supply of water. Sometimes having a nursery heat bed (used to increase the growing rate) set too high for that particular plant type will have that effect as well.

Tree roots generally grow toward moisture until it has access to the required amount of water. This is usually downward but not always. If a hard clay pan or rock shelf is encountered tree roots may grow sideways to access the volume of water required. In poorly drained soils tree roots will activley avoid stagnant water which might contain pathogens damaging to trees.

Trees have adapted to variouse environments in variouse ways, for example in an area with low, light rainfalls the soil moisture can be less in the subsoil than the top soil. In this case trees can adapt in several different ways, deep roots to access subteranian moisture or shallow roots to take immediate advantage of any minor rainfall or even dew. sometimes they will store exess water in special cell structures see Australian baobab trees. Nutrients do play a role but are usually dissolved in water before trees have access.
0 Replies
 
markr
 
  1  
Reply Sun 5 Mar, 2006 08:39 pm
Roots grow up down under. Smile
0 Replies
 
littlek
 
  1  
Reply Sun 5 Mar, 2006 09:08 pm
Actually, I think they grow down for water more than nutrients. ll - you ask if they always grow down.... do you mean as opposed to up? Because sometimes roots grow laterally (outward) as much as down.
0 Replies
 
Heliotrope
 
  1  
Reply Mon 6 Mar, 2006 03:05 pm
Roots grow downwards in response to gravity.
In microgravity (in orbit) they tend to grow in a spiral.

There are cells in the roots that have tiny particles in them that cause cell growth and division. These particles are slightly heavier than the rest of the stuff inside the cells and so under gravity they basically fall slowly to the bottom of the cell where they trigger cell division ie. growth.

This is not a complete explanation as I am not a botanist or a biologist but it covers the basics.
0 Replies
 
spendius
 
  1  
Reply Mon 6 Mar, 2006 04:28 pm
That's what I told them.
0 Replies
 
Chumly
 
  1  
Reply Mon 6 Mar, 2006 04:50 pm
My (gray) roots grow out
NobodySpecial
 
  1  
Reply Thu 30 Mar, 2006 11:14 am
The dude in this vanity page says the roots grow where the gravity vector is headed. So in his cylinder haf way down the page, it rotates to give artifisial gravity making tree roots coming <<outwards>>

http://www.astroscience.org/abdul-ahad/firstarktoalphacentauri.htm

cool ;-) !
0 Replies
 
rashaun1106
 
  1  
Reply Fri 25 Feb, 2011 09:02 am
@llmtony,
u stupid idot ur so dumb all plant grow upward nd downward u stupin idot
0 Replies
 
rashaun1106
 
  1  
Reply Fri 25 Feb, 2011 09:03 am
@Chumly,
wat a dummy
0 Replies
 
 

Related Topics

Evolution 101 - Discussion by gungasnake
Typing Equations on a PC - Discussion by Brandon9000
The Future of Artificial Intelligence - Discussion by Brandon9000
The well known Mind vs Brain. - Discussion by crayon851
Scientists Offer Proof of 'Dark Matter' - Discussion by oralloy
Blue Saturn - Discussion by oralloy
Bald Eagle-DDT Myth Still Flying High - Discussion by gungasnake
DDT: A Weapon of Mass Survival - Discussion by gungasnake
 
  1. Forums
  2. » Do plant roots always grow downward?
Copyright © 2021 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.06 seconds on 09/28/2021 at 01:34:19