En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Wednesday - January 24, 2007

From: Portland, OR
Region: Northwest
Topic: General Botany, Trees
Title: Alleotrophic effects of caffeine found in Ilex species
Answered by: Joe Marcus

QUESTION:

I'm doing research for my biology class on the alleotrophic effects of caffeine. I'm planning to use Ilex vomitoria as the caffeine-producing plant. As the control I want to use another non-caffeine-producing holly, but I'm having trouble finding a source that states which hollies do or do not produce caffeine. Could you please help me?

ANSWER:

We do not know of any resource that specifically documents the caffeine content of various Ilex species. However, in designing your experiment, you will probably need to know not only what species contain caffeine, but which plant parts contain the compound and in what concentrations. So you will likely need to first measure the caffeine content of your test plants anyway. Moreover, you will need to determine by what mechanism your test plants impart their allelotrophic effects. This will also be important to know before you can study the allelotrophic effect of the test plants.

 

More Trees Questions

Wild native trees with orange blooms
March 30, 2012 - What is the wild native tree that is blooming orange blooms - as you drive down the road thru Chappel Hill, and Brenham area. I've never seen these before when we went viewing bluebonnets - however,...
view the full question and answer

Defining drip line on trees from Austin
August 08, 2011 - When you say that trees should be watered at the "drip line," do you mean that literally? I assume that the drip line means at the outside edge of the leaves or branches. Does that mean that waterin...
view the full question and answer

Perennial Suggestions for Under Ash Trees in Minnesota
June 12, 2013 - With our house we have inherited 2 ash trees in our front yard with a large amount landscaping underneath. I'm replacing the landscaping but there are tree roots at the surface preventing me from bei...
view the full question and answer

Identity of tree with fragrant yellow flowers and thorns
June 06, 2013 - I'm not sure if this is a native plant. It's a tree, around 15" tall. The leaves are in bunches with 3-4 very sharp small spines at each bunch. Flowers are small, yellow, hang down from the leaf...
view the full question and answer

Protecting storm-damaged pecan and black walnut trees in TX
June 29, 2015 - Several trees on our property in northeast Texas were uprooted by a tornado. A pecan tree with a circumference greater than 93 inches was carried to the ground. Although it is completely horizontal,...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center