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Wednesday, February 11, 1987/The Battalion/Page 7
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Dan Lawson D D S 1712 S W ‘ Parkwa y M - F 10 a m.-8 p.m.
uan Lawson, (across from Kroger center) Sat. 9 a.m.-l p.m.
at Slit
vill mtt:
neeui
at 6 pi
mCJ
adder
will mtei
TY:wI
305 M
501U
102 T»
t at 8:5
studenli
e Collejf
Photo by Tracy Staton
r. Jay ThomnM col L etn petunia seeds from plants that are part of his gene experiments.
New gene transfer method
ould improve cereal crops
/■N
o
By George Weissenberger
Reporter
Electroporation is a relatively
new method of gene transfer that
shows great potential in improv
ing cereal crops, says Dr. Jay C.
Thomas, a member of a gene
transfer group in the biology de
partment at T exas A&M.
Electroporation allows genes to
be transferred into monocotyle
dons — corn, beans, barley, rice
md other important crop plants,
Thomas says.
Before electroporation, he
says, the preferred method of
gene transfer was limited mostly
to a group of plants called dicoty
ledons, which doesn’t include ce
real crops.
This older method of transfer
ring genes into dicotyledons,
Thomas says, makes use of a type
of bacteria called agrobacterium
tumefaciens. This bacteria con
tains a plasmid called the ti plas
mid, which, for some unknown
reason, can transfer part of its
DNA into a plant cell, he says.
In nature, Thomas says, this
transfer of DNA can result in
strange, tumor-like growths on
plants. But in the lab, geneticists
have learned to take advantage of
the process by cutting out sections
of the ti plasmid and filling the
gap with other genes, he says.
The genes then could be trans
ferred into a plant cell by the bac
teria, he says.
Electroporation does away with
this long bacterial process by al
lowing f ree genes to directly en
ter into a plant cell, Thomas says.
T hrough electroporation, free
genes are mixed with plant cells
chosen by the geneticist, he says.
The cells, he says, are prepared
by having their cell walls dis
solved by an enzyme called cellu
lose. Once the cell walls of the
plant cells are dissolved, the
genes are allowed to come into di
rect contact with the cell mem
brane, he says.
T hen, the solution is jolted
with about 350-40() volts per cen
timeter, he says, burning holes in
the cell membrane, allowing the
genes to enter and enabling the
cell to repair itself .
Afterward, the membrane is
able to repair itself, he says.
“If you’ve been very careful in
growing your cells in your cultu
res,” Thomas says, “you can end
up with a mature plant.
“Without being able to do this,
the whole process of introducing
new genes into a cell would be
worthless. T he next challenge is
to isolate genes that are of agron
omic interest. We’re not thefe yet.
We’re just f inding out what genes
are important for disease resis
tance.”
Many interesting ge-nes already
exist in nh’ture, he : says, and it’s
just a matter of f inding them.
ident At'
Comptroller: Think about state income tax
rams i
ungt
AUS TIN (AP) — State Comptrol
ler Bob Bullock told Senate budget
vriters Tuesday he is as opposed as
inyone to a state income tax but
|‘you might as well talk about it, you
light as well think about it.”
Bullock said because Louisiana
las a state income tax, it will obtain
about a 28 percent increase in reve-
l Tme next year by amending its law to
coincide with the new federal tax
law.
“But in Texas, where are we?” he
asked. “We don’t have that, we don’t
have a growth tax.”
The comptroller appeared before
the Senate Finance Committee on
his request for an office appropria
tion of nearly $218.4 million in
1988-89. Unlike what many state
agencies are facing, the original Sen
ate bill proposes almost as much as
Bullock is requesting.
Bullock said as a result of layoffs
and job attrition during Texas’ re
cent financial crisis, his office had
lost 470 jobs the last two years.
Sen. Roy Blake, D-Nacogdoches,
recalled, “Years ago in East Texas, if
you " e tax it was
enougn iw — even (just)
die mention.”
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/STUDENT
GOVERNMENT
TEXAS A&.M UNIVERSITY
“ So, You Think Your A Texas Aggie”
-Ormond Simpson
Muster, first held on June 26, 1883, has become one of the
most sacred Aggie traditions. In the early 1900s, Muster was
changed to April 21, San Jacinto Day, In commemoration of the bat
tle that won Independence for Texas against Mexico's Santa Anna
150 years ago. Every April 21, Aggies gather throughout the world
to pay homage to all students and former students who have died
during the year. The principal ceremony is held on campus where a
roll call is read for those who have passed on. A candle is lit as
each name is called, and some living comrade answers “Here” to
symbolize that even though the Aggie is no longer present in body,
he will always be present in spirit.
Muster is more than a ceremony. It represents a pledge and re-
sponsiblity of A&M men and women which has been handed down
from generation to generation, from year to year. It is a way for each
of us to renew our loyalty and unity, which constitute the basic foun
dations of our relationship for each other and our love and devotion
for our school.
Muster, April 21
IS
Pedernales Falls
State Park
February 20-22
Join us in hiking through the
Texas Hill Country!!
The $35 fee includes camping equipment, backpacks,
food, permits, transportation costs, and experienced
guides. Sign up in the Intramural-Recreational Sports
Office in 159 Read until February 16. For more informa
tion please call Patsy at 845-7826.
y. fifty..
\
It
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