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primary versus secondary growth and how this applies to monocot and dicot stems

2006-11-22 04:17:46 · 2 answers · asked by Anonymous in Science & Mathematics Botany

I basically want to know what the differance are in monocots and dicots when i comes to primary and secondary growth in the stem

2006-11-22 04:23:51 · update #1

2 answers

Primary growth as it applies to the stem of a plant is simply the elongation of the stem. Both monocots and dicots display primary growth as both plants elongate regularly throughout their life cycle (typically). Secondary growth is the thickening of the stem. Monocots are broadly said to have no secondary growth. Many dicots display extensive secondary growth and dicots are broadly said to display secondary growth commonly.

The reason for the lack of secondary growth in monocots is due to the scattered arrangement of xylem and phloem in the stem. The thickening of the stem would cause the xylem and phloem to break in the stem and be non-continuous due to the uneven division of cells in the stem. Whereas dicots have secondary growth as their xylem and phloem are arranged in a circular fashion which permits thickening of the stem inside of the circular bundle of vascular tissue without causing the vascular tissue to break.
Breaking the vascular tissue of a plant would stop fluid and nutrient transport in Angiospems (which are flowering plants that include all the monocots and dicots) which would kill the plant.

2006-11-22 04:30:39 · answer #1 · answered by mg 3 · 2 0

Monocot Vs Dicot

2016-10-16 07:07:51 · answer #2 · answered by ? 4 · 0 0

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RE:
monocot vs dicot stems?
primary versus secondary growth and how this applies to monocot and dicot stems

2015-08-19 03:31:05 · answer #3 · answered by Hiro 1 · 0 0

Monocot stems have scattered vascular bundles. Dicot stems have their vascular bundles in a ring arrangement. Monocot stems have most of their vascular bundles near the outside edge of the stem. The bundles are surrounded by large parenchyma in the cortex region. There is no pith region in monocots. Dicot stems have bundles in a ring surrounding parenchyma cells in a pith region. Between the bundles and the epidermis are smaller (as compared to the pith) parenchyma cells making up the cortex region. Click here to view a large image of plant stem and root structure ( --> http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookPLANTANATII.html

2006-11-22 04:22:19 · answer #4 · answered by DanE 7 · 1 1

Monocot is like grass and corn
Dicot is like beans
What exactly do you want to know??

2006-11-22 04:21:20 · answer #5 · answered by tyreanpurple 4 · 0 3

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