The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1885-1921, 1905-11-23

it is through hairs, socalled that the plant taxes
in it's water and mineral salts from the soil
If YOU will watch growth OF the root for day or two,
you viii notice that the hairs tu1es away rom m up
are continually dying off and dropping away, WINE new ~
are continually being formed nearer the TIP and TINS process
is constantly going
In regard the growth OF the root IN length "oud Say
that it quite an easy that by marking
off fine equal distances and after certain number OF
hours measuring the new distances between lnese
will then the growth length OF the root Is
confined very definite region The region at Ie
tip does elongate at all; eonganon begins at NIUE @
behind the tpt greatest little further back and then
again until finally in the region OF the root mars t
growth in length at all Inc root mars tne, do
develop subjected continual dragging forward as
they would be they arose nearer the up IS 's fh
region elongates, it pushes the root TIP forward ana
into the soil.
will now give YOU some the of the root
These regions brought clearly by examining
thin longitudnay through the middle OF root
composed of loose cells you examine them particularly
you they dead that is that they do not con-
tain the protopasm which DR. Cobb has been talking about
These cells being constantly rubbed OFT as the root pushes
way the SOIL but constantly being renewed
living cells behind AS they out they gradually
lose proopasm and become dead OF course you can
for that The outer cells beng dead form
protective covering for the cells within
Covered by cap is OF delicate
in-waed coseypacked cells which form the actual tip OF
are full of proopasm and are always actively dividing By
fresh cells constantly added in front to the
of the which this division takes place
described you the OF division and
takes place When these cells formed they are pushed
by cells and They then commence to eongate
The further get the merstem, the longer
cells become The elongaton more marked IN the
middle than it the sides.
The growth the region behind the merstem find IS
through the forming OF cells here but by the eonga
ton of the cells already in existence certain distance back
that the elongation Then the root hairs
develop.
hairs commences piferous layer; hair is sim
pie tubular outgrowth from OF the cells in this layer
which is the outermost covering LAYER the
cap
central region OF the another important change
place. which the formation of vessels This brought
by the OF
cells standing above the other join themselves together
and the dividing walls between them the wallis
are broken down and the two cells become Whole
of cells take part in this process until hollow pipe or
length These tubes be found only in the central part
the and known vessels said before Not
only does this fusion take place but these vessels undeg
change, by which they lose their protopasm that their
living matter, their walls become woody The walls of
ordinary cells are composed OF ceuose but these vessels as
they forming become woody The cells OF the pliferous
layer further back also change and become mpervou to the
water The special feature is that while these woody cells
very their walls quite permeabe water
that easily pass through from another
think that ali need to now about the parts OF the
have dwet it rather fully in my bulletin
which you will have the opportunity OF readlng wish
will to describe the way in winch the roots
perform their function of supplying the plant with food The
their walls practically fuse with the solid particles and are
thin you how easy it is for the water TO
pass soil the cavities of the root hairs and
from them plant mention the fact
the Immediately around the particles of soil
which the useful from agricultural standpoint and
this water which forms film around the soil part
cles that the hairs into such close relationships
salts passes the hairs through these cells
the woody vessels, and it solely these
Of the takes place AS have
continuous strands
ing they upon the other and thus form continuous
channel having breaks the passage OF the that
the the does
pass through other cells but these wood vessels
the vessels vessels in the and
finally 1t the leaves where the
absorbed the air. and brought from the soil
are BY complicated series of changes manufactured
into starch other complicated compounds.
After compounds formed they down from
he into
Of the plant OF portions OF this
lfacured socaled used Immediately by the plant
There a less of
through by the above described
required the manufacture of the
pounds mentioned would say that this
IS thrown off into through the breathing pores
leaves.
will your attention the subject of Root Disease
and will point the notable symptoms of the
occurrence fungus which observed the field If
is badly hz