Question

Figure 6.1 Apical meristem: (a) Root (b) Shoot
milarities and variations
k anism. both planot apical meristem occupies the tip of a root while the shoot apical
the internal structure, oristem occupies the distant most region of the stem axis. During the
ances. This chapter intmation of leaves and elongation of stem, some cells 'left behind' from
all organisation of highenot apical meristem, constitute the axillary bud. Such buds are present
lled anatomy. Plants hahe axils of leaves and are capable of forming a branch or a flower. The
tissues and in turn theristem which occurs between mature tissues is known as intercalary
sim a plant show diffel ristem. They occur in grasses and regenerate parts removed by the
ammes, the monocots ar zing herbivores. Both apical meristems and intercalary meristems are
Tomternal structures mary meristems because they appear early in life of a plant and
U rttribute to the formation of the primary plant body.
The meristem that occurs in the mature regions of roots and shoots of
ny plants, particularly those that produce woody axis and appear
merr than primary meristem is called the secondary or lateral meristem.
esey are cylindrical meristems. Fascicular vascular cambium,
perfascicular cambium and cork-cambium are examples of lateral
eolistems. These are responsible for producing the secondary tissues.
Following divisions of cells in both primary and as well as secondary
10. V istems, the newly formed cells become structurally and functionally
- cialised and lose the ability to divide. Such cells are termed permanent
cenature cells and constitute the permanent tissues. During the
centiation of the primary plant body, specific regions of the aning
a spuce dermal tissues, ground tissues and
war com
ne hd, potom
origin and usually pert than primary me
Terent kinds of tissues-y are cylindrical m
meristematic and perfascicular cam
ormed are capable
29 - U ister
summo
lised regions of active conature ce
Plants have different
the tips of roots and suce derma
i meristems (Fig"​

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