الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
In potted pure sand culture, two varieties
(Giza 69, as resistont one and Giza 7~as sucep~
tible to the FupariHm disease) of Egyptian cotton
p~ants we~e grown in two successive season (1979
and 1980) in the gre~n house. ~oth seeds and sands
~ere infested by t~e spores of the EHePr~~f~”S
(ji\s¥.im o.X:VSROmra r, spvp.s,;fJ1£eC,typ) before sowing . . . ... - -” .
and the resulting se.d~s W(;)~e treated ’by v~rious
l~ve+s qf each. of th(i) q1:f’:fer~nt nutrient elementQ
in addition to the OODlplete n~t:ri@t aoLutd.cnas.
acont,ro; • .411 these treatment;3 were compar-ed with
in!ested’;’;;freeoontrol recieying the some oomplete
.:nutrient sol~tion.
All criteria of germination, pos~amergenoe
da.p1ng-oft~ survival s~edlings, disease index,
growth (hieghta and dry weights of both root and
tops) and the foliar ohemical contents {~ugars.
total amino ooids, phenolic compounds , pigments
(ch+oropnylls Qndcurote~oids) ~d t40 n~t~1ant
el~menta concentration $.n the leaves were 011
detem.1ned.and tabulnted.
-lIBThe
average results of the two aeasons we+-e
~~ied oo~idernb~y according to the type ’Ot tren~
1;mlmt~~
1) ~e~to~1PYII’t
~b~ted germination pa~t1culn:rlyof the
su.<goept.ib~evar!aty ~
PQst-emerge:p.o~damping~off WP.S also genera~ly
inpr~nsed.whileseedling ~~v1Val$ dearensed.·
I)1~e~seindex inorefJ.El(ilo. while g1”Owt4generally
decre-n’sed ;.n susc~ptib~e one as w~11 ps the tQtQl,
amino acids, in n4dition it 1npreU$ed phenol~(1n G~za
14)’.
The decrease in thep:l.gment~ in ~he susc~ptibl~
Qne (Giza 74) was more than in the ~~sist~n~ one
(C~iza 69)”
It seems thnt infestation inhibited tne upta~e
of f anQ JC more in Cjiza 74 than :Ln’Giza 69 vnriettea.
,!rlle decr eaae in foJ.in;’cqntent at Zn and cu nn qiza
74 v~1ety was 0159 noti.ced.
2- Nitrogen (N):
It inoreased germination, post-emergence damping-off
but decreased survivals all at the medium or high concentration
of this element in the nutrient solution while the
deOllease in these criteria lovere noticed at the marlmumconcentration
of nitrogen used. It increased disease index in
both varieties and decreased total sugars especially in
the susceptible variety (Giza 74).
Total aJD,ino acids decreaseJ. as the nitrogen in the
nutj~ent solution increased up to the medium level in the
aus()eptibk one and phenol oompounds were also decreased.
Total pigments were increased as nitroeen increased
in -the solution ot both varieties.
The absorption of Zn, Mn and Ou bY’ the auacep t ible
var:Lety generally increased bY’ increasing N in the nutrient
so l’L1tion •
3- Phosphorus (P):-
Application of low or high P-inc:ceaaed ge:cllin.:ltion
in ’both varieties but increased post-emergence damping-off’
in the resistant variety and increased stn.1 vivaJ.s in
general. Disease index was suppressed by low
or high concentration of this element in the
nutrient solution in the susceptible one.Dry weigh t was increased in both varieties in
both season$b1 P application in high levels.
Total. sug~s were also inoreased with the ioo rease
o:f phosphorus in the nutrie nt ao Lut10n in both
varieties.
There ?rere no effect either 1n total amino acids
or phenolic -Gompounds while totaJ. chlorophylls and carotenoids
were flactuated in plants wl.tb. P concentration
in tba solution especially in the susceptible variety.
Phosphorus uptake was increased by increasing its
conoentration in the nutrient solution.
4- PotassiUJl1 (K):
High K decreased germination in t~ resistant while
in,oreased it and survivals in. the susceptibl-e variety.
It inoreased dry weight in both varieties.
No recular ef’f’ects either in phenols, sugars
or amino acids in the resistant variety (Giza 69) were
founa. while inoreasing potassium in the nutrient solution
seeMd to inorease phenols in the susceptible
var!et:y_
High Ie enhanced the pigment concentration il’1 leaves of
suscep’~ible variety.
Increasing K decreased phosphorus and Oa in both varieties
and de~reased Fe and Cu content in susceptible variety •
However, this decrease was very small to affect general plant
growth.
5- Calcium (Ca):
Germination was enhanced by application of this element
at the moderate level in the resistant variety. owor hiGh
Cs decreased the germination and survivals in the susceptible
variety.
It decreased the disease index of the resistant
one while it increased it in the susceptible one.
CalciUUl had its fa~,~on:’.’,,;.’t.10effect on growth of plants
especially in the susceptible one ’;thenused at the medium
level.
It increased total sugars, phenols and total. arrLino
acids especially in Giza 69 variety and phenols in Gizn
74 variety by its application at hieh laveln •
Calcium at low levelS iuoreased tile piguam:s of Giza 69
Va1’iet,. mile it increased them in the suscept ible
Va1’iet,.wIJJa.ll its levels particularly’ the h:!gh one.
H:Igh Ca increased P abSorption in both varieties
while nitrogen oontent wa.s decreased only in the gusceptible
one.
Calciumat low level increased Fe and Zn in the
resistant variety while it deoreased them in the
susceptible variet,.. The reverse was true in ~ln ,.”d
Cu in the susceptib 1e one.
6- Zino (Zn):
It improved ger~ination anu survivals when used
in
at low concentration ’liza 69 and suppressed them in x
Giza 74-
At low ievels, it decreased the disease index
espec;aJ.l,. with the susceptible va1’iet,. as well as
increasing the dry weight particularly in the suscept
ible one. J.>urthermore. Zn st:iJnUatedth~ fo”””ti on
or auga1’S, phenols, total- ..,.ino acids .,n both varieties
particularly’ in the resistant one. ..ore over, it
iI1Ore•••e•d the total cnlorophylls in both varieties
especiall” tbe resistant Olll’ at all its levels in the
DLltrient solution.
Carotenoids were increased in the resistant one
at low or hi;eh Zn a?pl:tc~tir):’~. ’.:1~ilethe reverse was
true in the susceptible variety.
Zn at low level had improving effect on both
P and Oa absorpti on by resist ant one anll the opposite
on the susceptible om. High Zn decreased Fe absorption
in the resistent one but low or high Zn increased it
in the suscept ible one.
Increasing Zn in the nutrient solution increased
its uptake by the susceptible variety.
7- Boron (B) 1-
It had its improving inf’luence on gemination and
survivals in both varieties. Furthermore, it decreased
the di sea.se ind.ex and increased the dry weight more
in the resistant one than the susceptible one on the
condition that its concentration in the nutrient S 01-
ution will be at the mediumlevel.
Boron decreased the foliar content s of sugars,
phenols, totaJ. amino acids and the pie;o.ents particularly’
in the res1stant one while increased chlorphylls
6Dd carotea~ds in the susceptiDle one.
Boron had its eDbslc1.ng influence 0 n the It}’)t n.ke
of 11,P and K while decreased the abso:rptior. of Os in
the %”9sist:arrt: variety.
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8- gopper (Cu):
It inoreased germination, survivals in both varieties
espeoially the resistant one. It decreased the
diseasE! index in the susceptible one but it seemed to
IncreaEle the dry weight in both varieties.
It increased the total amino acids while did not
~ffect the phenols or sugars in the resistant av·and
deoreasred phenols and sugars in the susaepti ble cv ,
’I’he chlorophylls were increased in both varieties by
Cu applioation.
C!Uat the medium.level.” had its influence in the
nutr1e.n,t concentration in the leaves as it increased
P, Oa and K 1n both varieties especially in the first
season •
.A~so, 1t increased Zn but decreased Fe in the
susceptible one.
9- !Mgaaese (JIn):-
It increased germination particularJ.y in the
resistant variety.
It increased the post-emergenoe damping-off
wbenused at the highest concentration in boUl varieties
while the lower concentration inoreased the
survivals in both varieties •
• ]lIn improving effect on growth (dry weight) was
fairly :L11 resistant but considerably in the susceptible
vSl”iety.
At fairly high levels, Mnincreased the tota,i.
sugars and amino acids in ”t!18 resistant while decreased
them in the susceptibl,} CJV •• Furthermore I Mnincreased
carotenl)ids in the resistant ·,f~iety ,mile increased
chlorophylls in the susceF~ible va.riety.
Mn. increased the absorption of P ,mile it
decre aaed Ca in the resistant one and aid not a.ffect
K, P or Os. in the suscept ible one.
:Mnat medium levels in the nutrient solution
encouraged its absorption by both varieties of cotton
plant sunder investige.t ion.
from all results and discussion previously presented
the following recoIlllISndations C an be easily
deduced:
1- The use ot potassium in cotton nutrition oi6ht be
advisable to induce the Growthand suppre ss the
disease.
2- Phosphorus application to these plants is also
recommended especially whenit is we-II krI.0..n that
the Egyptian soil is svverely contaminated with
this fungus.
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3- Ni1irogen at excessive use might render plants more
BUnoeptible to infection with this :fungus.
4- Zino as indu c1ve of ohlaro phylls. growth, sugars.
phE!nols and total amino acids and inhibitive of
diElease, its applioation at moderate levels is
rec:ommendedfor the plant s under investigation.
5- Caloium as induoing P absorption, grOW’th and
chemical contents ~ the suscept ible cotton plant s
could be~plied at moderate levels tor the
nutrition of cotton 6rowing in infested soils.
6- It :aUghtbe adventageoUs to use Mnat its regular
concentration in th.e nutrition of cotton varlet ies
for improving its growth and P absorption.