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Dicot

Definition

noun, plural: dicotyledons

A group of flowering plants belonging to the class Magnoliopsida of Angiospermae (angiosperms), characterized by having two photosynthetic cotyledons in the seed that may emerge from the ground when the seed germinates.


Supplement

Examples of dicotyledonous plants are beans, buttercups, oaks, sunflowers, etc.

The angiosperms (the flowering plants) can either be a monocotyledon (or monocot) or a dicotyledon (or dicot) according to the number of cotyledons in their seeds (which in the case of dicots the cotyledons are two, hence the name). The cotyledons of the dicots may also emerge and show above the ground and function similar to leaves (i.e. perform photosynthesis).

Apart from the number of cotyledons, other identifying characteristics are as follows:

  • the number of flower parts - dicot flowers are tetramerous or pentamerous (in multiples of four or five)
  • the number of pores in pollen - dicots have three
  • arrangement of vascular bundles in the stem - in dicots, the vascular bundles are in concentric circles
  • secondary growth - dicot stems usually have secondary growth
  • the roots - dicot roots have taproot system
  • the arrangements of major leaf veins - in dicots, the leaves have reticulate venation


Word origin: From di- ("two") + cot- from the abbreviation of cotyledon ("embryonic leaf").

Variant: dicotyledon

Compare: monocot


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Concept of sexuality in plants.

... I think advanced plants are exclusively m/f) connects to the gametes involved (the parts are secondary to that), with one cell (unless you're a dicot) specialized to accumulate food for the offspring. In many plants, individuals produce both types of gametes. Some are asexual, especially highly-modified ...

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by Darby
Thu Aug 01, 2013 3:08 pm
 
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Lemna minor

Can somebody please tell me why the lemna minor is an oddball dicot?

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by Studentofthegreen
Sat Oct 27, 2012 3:29 am
 
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Monocot vs Dicot

Difference between Monocots and Dicots, Monocots have a single cotyledon,Dicots have two cotyledons Leaves of Monocots have parallel veinations and leaves of Dicot have branched veinations. Monocots have fibrous roots and Dicots have tap ...

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by sumita
Thu Sep 02, 2010 12:42 pm
 
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Re:

Please rephrase your question, it's hard to understand. Are you asking what the common ancestor at terminal node 99 was a monocot or dicot? it;s ovius that common anceter should be a dicot as monocot came into existance after dicot. i want to know that if a gene is selectively duplicated ...

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by cytocine
Fri Jul 23, 2010 7:44 am
 
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Topic: Query about evolution of a gene
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Query about evolution of a gene

Please rephrase your question, it's hard to understand. Are you asking what the common ancestor at terminal node 99 was a monocot or dicot?

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by SelfishGene
Mon May 31, 2010 7:57 pm
 
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