why does secondary growth not occur in monocot plants?
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Answer / swapna
Because of the absence of cambium in vascular bundle in
between xylem and phloem no secondary growth is seen in
monocots.
But in monocots like Draceana Secondary growth is seen .
Only in some exceptional cases but it is rare.
| Is This Answer Correct ? | 115 Yes | 12 No |
Answer / aakanksha
Secondary growth is initiated by the activity of the
vascular cambium as far as the steler region is
concerned.This intrafascicular cambium is absent in the open
vascular bundles of the monocot stem, thus the process
cannot take place. As for the roots, dicots as well as
monocots have closed vascular bundles. however, dicot roots
favour development of the cambium for secondary growth while
in monocots this is altogether absent.
Secondary growth in the extrasteler region is initiated by
the production of secondary vascular tissue. Since, as
explained above, monocots do not undergo secondary growth in
the steler region, there are no secondary tissues to
initiate such a growth in the extrasteler region.
Exceptions exists to this rule. Anomalous secondary growth
may occur in monocots; though this does not follow the
general route of secondary growth. In Bougainvillea, a
series of cambia arise outside the oldest phloem. Palmm
trees undergo diffused secondary growth in which increase in
the trees diameter is due to enlargement of the
parenchymatous cells.
| Is This Answer Correct ? | 53 Yes | 6 No |
Answer / suraj goswami
Secondary growth is absent in most of the monocot stem. because cambium not present between the xylem and phloem than they does not follow the pattern of a single vascular cambium producing xylem to the inside and phloem to the outside.
this process called abnormal secondary growth.
| Is This Answer Correct ? | 19 Yes | 0 No |
Answer / nasta
Because of the absent of cambium in
Vascular bundle in between xylem and phloem
No secondary growth
| Is This Answer Correct ? | 8 Yes | 3 No |
Answer / arjun jal
Because the absence of cambium in vascular bundle in between xylem and phloem.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / rekha
Because of absence of cambium wall the monocot stem does not undergo secondary growth....
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / abhay raj
The major role in secondary growth is of pro-cambium... Which forms primary xylem, primary phloem, and cambium(leads to secondary growth) in Dicots ...... While in case of monocots the pro-cambium is completely used up in formation of primary xylem and phloem... And cambium is not formed hence no secondary growth occurs
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / manisha kharyal
In monocot plants their cortex region is made up of sclerenchymatous type of tissues which dono undergoes divisions
And their promeristem is already has been used up tO form primary xylem and phloem
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / soumya
exceptional case of formation of cambium in monocots is the
reason for growth termed secondary growth.the general
herbivorous habit might recollect the stste of intense root
system for firm attachment to soil.
| Is This Answer Correct ? | 3 Yes | 28 No |
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