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In what ways are trichomes vital to the plant?

Why have them on the plant shoots as well?

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    $\begingroup$ This question would be better with more context. Trichome is a generic term for diverse, often microscopic, structures with a wide variety of functions. The question "but how does that work" should be addressed separately. $\endgroup$ – David LeBauer Mar 27 '12 at 2:17
  • $\begingroup$ Ok let me fix it. $\endgroup$ – Gabriel Fair Mar 27 '12 at 11:35
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Plant leaf hairs, or trichomes are vital for many reasons.

Interestingly in 1975 researchers were correct when they stated:

"It can be argued that essentially the same genetic system should be required for both root hairs and trichomes." [1](Pay-wall)

For example:

  • C. salvifolius, there are more adaxial trichomes present to avoid UV light from injuring the abaxial surface.[2](Pay-wall)
  • Increased transpiration [3](Pay-wall)
  • Protecting against insect herbivores [4](Pay-wall)
  • Increasing tolerance to freezing [5](Pay-wall)
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