Latest / Hydroponics Daily / What are Petioles"

Transcript

What are Petioles" · Hydroponics Daily

• 0:00
  Hi, welcome back to the Hydroponics Daily. I thought, considering we've been
• 0:04
  talking about vegetative propagation, like cuttings and layering,
• 0:07
  it's important to discuss what a petiole is compared to a stem,
• 0:11
  because this can lead to a lot of confusion and a lot of problems when it comes to propagation.
• 0:17
  So you have your stem here, it grows up, and then you have your leaves coming off it.
• 0:21
  And between the leaf and the stem, you have what's called a petiole, or
• 0:24
  a leaf stalk if you think celery that's a
• 0:27
  ptl rhubarb the bits you eat on rhubarb that's
• 0:30
  that's a ptl and those if
• 0:34
  you just take a cutting there of the leaf
• 0:37
  unless it's one of very few species
• 0:40
  that will not form roots because it's not a stem and
• 0:43
  adventitious roots the ones we want only form on the stem and so don't just
• 0:51
  put a leaf and take a cutting it has to be of a stem now you might think i know
• 0:55
  that that's obvious but some plants the ptl can look like a stem rebar for example.
• 1:02
  Or even celery this is an ash leaf here
• 1:05
  obviously it's expertly drawn sorry you're
• 1:08
  on the podcast and these are not leaves these
• 1:12
  are leaflets these are not these are
• 1:15
  not ptls these are ptolets i think they're called
• 1:18
  this is the ptol here so you might think these
• 1:21
  are leaves and this is the stem and you could just take a cutting there and
• 1:25
  it would take and it wouldn't because you need buds to form a cutting you need
• 1:30
  to take it just below a node or a bud so there are no buds on a ptl that's how
• 1:34
  you know stems always have buds on them that's how you can differentiate them,
• 1:39
  and that's why a potato is a
• 1:42
  stem even though it grows in the ground it's got buds on it eyes we call them
• 1:46
  okay so you can take a cutting from a potato because it's a stem you can't take
• 1:51
  a cutting from a carrot because it's not a stem and so always make sure you're
• 1:57
  taking cuttings of stem not ptls that's been hydroponic daily for today thank you very much.