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7/27/2019 thuoc tru sau vi sinh bt.ppt
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NG DNG CNG NGH VI SINHTRONG SN XUT THUC TR SU VISINH (Bacil lus thur ingiensis var)
TP.HCM thng 10/2013
GVHD : Th.S Vng Th Vit Hoa
Trng H Nng Lm TP.HCM
Hv Tn MSSV
Trn Cao Hiu 10139061
Nguyn Vn Giu 10139048
Nguyn Vn Phc 10139179Trn Nguyn Thanh Tm 10139199
L Th Hng Thy 10139235
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NI DUNG
Thuc tr su sinh hc Bt
1
Vi khun Bacillus thuringiensis2
C ch gy c ca Bt3
Cng ngh sn xut thuc tr su sinhhc Bt (Bacillus thuringiensis)
4
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HNH NH
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THUC TR SU Bt
Lch s pht trin: Nm 1901, vi khun Bacillus thuringiensis (Bt)
c pht hin bi Ishwatari.
Nm 1911, Ernst Berlinner nghin cu ra tc nhngy bnh trn loi su xm tnh Thuringia, cca loi Bacillus thuringiensis
Nm 1938, Bacillus thuringiensis c s dng
lm thuc tr su ti Php v n nhng thpnin nm 1950, Bt c s dng rng ri tiM.
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THUC TR SU Bt
Bt c nghin cu v ng dng rng ri trnnhiu quc gia nh : Hoa K, Lin X C, Php,c, Trung Quc, Nht Bn
nc ta, cui thp k 80 mt s c quan nghincu khoa hc bt u sn xut cc ch phmdit su t Bt.
Hiu lc ca cc ch phm Bt sn xut trong
nc i vi su t, su xanh, su cun l loinh tng ng t : 60% 100% , 12%32%,28%100% .
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THUC TR SU Bt
Cc laisnphmthngmic trn thtrngnh Vi-BT 32000WP, 16000WP; BT Xentary 35WDG,Firibiotox P dngbt; Firibiotox C dngdchc c...
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VI KHUN BtTrc khunGram (+), kch thc
1-1,2 x 3-5 m
Phtim mao, di chuync
Sinh bo t, kch thc1,62 m
Hiukh hochiukh khng btbuc
T bo ng ring hoc xp chui
Tora tinh thprotein trong giaiontobo t, kch thc0,62
mPh bin trong t nhin, c trtrong t, trn b mt cy v trnxc su
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VI KHUN Bt
Nhu cu dinh dng: Ngun cacbon: tinh
bt, maltose, glucose.
Ngun nit: cao thtb, pepton, bt men,bt bnh lc.
Mui v c: K2HPO4,
MgSO4, CaCO3
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VI KHUN Bt
Vi khun Bt sinh trng nhit 12-400C. Nhit thch hp 27-320C.
35-400C chng sinh trng nhanh nhng chng
lo ha. Nhit thp chng sinh trng chm.
pH thch hp l 7,5.
8,5 vn c th hnh thnh bo t.
pH=5 th khng hnh thnh bo t.
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VI KHUN Bt
Lm ngngktsa Trong nggluco glyxerol stoaxit
Phnngdngvimetyl
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VI KHUN Bt
Thsinhdng
Nang bo t Bo t vtinh th
Chu trnh sinh trngv pht trin
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VI KHUN Bt
Th sinh dng: Dng que, hai u t, kch thc 1,2-1,8m x3-5
m, bt mu gram dng.
Lng mc xung quanh, hi ng hoc khngng, thng tn ti 1 hoc 2 c th lin nhau.
Sinh sn theo kiu phn chia ngang. Trong thi ksinh sn c 2,4,8 th dinh dng lin nhau
thnh chui.
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VI KHUN Bt
Nang bo t:khi cc th vi khun gi, mt u no trong cth hnh thnh bo t hnh bu dc, cn u kiahnh thnh tinh th hnh thoi. Nang bo t hnhtrng di, to hn th sinh dng.
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VI KHUN Bt
Bo t v tinh th: kch thc bo t t
0,8-0,9mx 2m.
Tinh th c kchthc t 0,6-2um.Hnh thoi, cng cloi hnh trn, bu
dc. Tinh th l mtprotein l cht ditsu hiu qu chyu.
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h h
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Ngoi c t (phospholipase C)
1953, lnu tin Toumanoff pht hin thyBTvar. elesti snsinh enzyme lethinase.
Phn hy mang tnh cm ng ca Phospholipittrong m cacn trng, lm cn trng bcht.
utin enzyme ny lin ktvitbo rutcacn trng, sau tch ra v chot ha bimt cht khng bn nhit, cht ny c trng
lngphn tthp,c thl lipit.
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c tm ra vo nm1959 khi Halt v Arkawwanui utrng ruinh bngthcnc chaBT.
Thnh phn gm adenin, riboza v phospho
(1:1:1). Ha tan trong nc,bnvngnhitcao,c
th chu c nhit 120-1210C trong 10-15pht. V thgil ngoictchunhit.
Ngoi c t
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Xut hin trong giai on vi khun pht trinmnh,trckhi hnh thnh bo t.
L mt nucleotit c trng lng phn t thp,c adenin, riboza, phospho vitlbngnhau.
Ngoi c t (tt)
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Tc ng km hm nucleotidaza, ARN-polymeraza.
Cn cng hng vi ni c t gy thay i
sinh l dnnci chtnhanh cho utrng. Hiu qu trong vic chng su non (gy tr tr
trong vicchuynha ltxc).
Ngoi c t (tt)
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TINH TH C
Ni c t (delta- endotoxin) Tinh thcCry c to ra vi mt lng ln
hnnhiuso vichtcCyt v l tc nhn c hiu
quchnh trong vicgy ccho cn trng.
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Tinh thc
Tinh thckhng ha tan trong nchoccc
chthucnhng c thha tan trong dung dch
kim. C hn50 gene m ha cc protein tinh thc,
c thchia protein tinh thc thnh 15 nhm da
trn sgingnhau trong trnh tgene
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Ni c t c hn trong 50 gen m ha cho protein tinh th c
c gii m cho php phn loi cc cht c ny thnh15 nhm
GenHnh dng
tinh th
Khi lngprotein tinh th
(kDa)
i tng dit
Cry I (nhiu nhm ph:A(a), A(b), A(c), B, C,D, E, F, G)
Hnh thoi 130138 Cc u trng b cnh
vy (Lepidoptera)
Cry II (nhm ph: A, B,C)
Hnh khi 6971 Cn trng b cnhvy (Lepidoptera), bhai cnh (Diptera)
Cry III (nhm ph: A,B, C)
Hnh phnghoc v nhhnh
7374 Cn trng b cnhcng(Coleoptera)
Cry IV (nhm ph: A,B, C)
Hnh thoi 73134 Cn trng hai cnh(Diptera)
Cry VIX adng 35129 Nhiu loi
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Cc dngtinh thnict:
Dngnhthp
Dnghnh cu
Dnghnh vung Dngkhng nnh
Dnhhnh lm
( theo Rn. Gaixin, Feng Xichang v Feng Weixiong,
1983)
Ni c t (tt)
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Vng chc nng ca Cry
Vng I: l mt b gm 7 chui xon , mt vichui hoc tt c cc chui c th ci vo mng tbo rut, to ra cc l cc ion qua li t do
Vng II: cha3 dikhng song song tng t
nhvng gnkhng nguyn caglobulin mindch,
vng ny c chcnnggnviththtrn bmt
tbo bium rut.
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C CH GY C
Khi su n phi l c vi khun, tinh th c cngvi bo t xm nhp vo c th.
Trong iu kin bnh thng, tinh th khng hatan. Khi i vo rut gia ca su ni c pH>9,5lm cho tinh th c tan ra. Dng ha tan nycha phi l dng hot ng.
Dng tin c t ny c protease ha trong
rut gia ca su hot ha thnh c t
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C CH GY C
c t ny gn vo t bo biu m thnh rut, lmcho rut su b t lit dn n ngng n.
ng thi c t ny m qua mng to thnh lxuyn mng dn n mt cn bng ion lm vinhung mao trng phnh ln. y l nguyn nhnlm su cht.
pH trong rut gim xung bng pH ni mi trong
huyt tng. pH thp ny cho php cc bo tny mm, xm chim vt ch cui cng gy cht.
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1 s loi su m BT c th dit tr
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Su Lymantria dispa Helicoverpa armigera
B cnh cng Coleoptera B2 cnh Diptera.
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CNG NGH SN XUT Bt
Sn xut ch yu theo 2 cch: ln men thng(ln men b mt) v ln men chm c sc kh.Cng ngh ln men xp t hiu qu khng cao
nn ch yu dng phng php ln men chm.
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CNG NGH SN XUT Bt
Kh trng: Sau khi chun b mi trng xong nni kh trng vi cc ch kh trng sau:
Kh trng bng phng php gin on: tinhnh p sut d 0.05-0.1Mpa vi nhit t110-1200C trong vng 11,5 gi.
Hoc kh trng lin tc: tin hnh nhit caohn 140-145 v thi gian ngn hn 5- 15 pht
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CNG NGH SN XUT Bt
Ln men: Tin hnh trong ni ln men c dungtich 500l, 1000l, 2000l , iu kin nhit t 27-320C iu chnh pH =7,5 trong khong thi gian t48-72h. Trong qu trnh ln men tin hnh thikh.
Ch thi kh: ngng thi kh ln nht cho qutrnh ln men l 0,5-0,6m3mi trng/m3 khngkh.
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CNG NGH SN XUT Bt
Cc yu t nh hng n qu trnh ln men: Nhit : nh hng n s hnh thnh bo t.
Nu nhit qu cao hoc qu thp s ko dihoc rt ngn qu trnh ln men. Nhit thchhp l 300C.
Cc ch lun chuyn ging: nh hng n shnh thnh bo t v tinh th c. Nu s dng
lin tc s xy ra hin tng nhim thc khunth. V vy ln men khong 10-15 ln ging c thcn phi thay ging mi.
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CNG NGH SN XUT Bt
nh hng ca pH: vi khun Bt thch hp trongmi trng kim pH=7.5, iu kin 8,5 vn cth hnh thnh bo t, nu pH =5 khng hnhthnh bo t.
nh hng ca oxi: vi khun loi hiu kh, phi c oxi mi sinh trng tt, nht l khi hnh thnhbo t. Nu thiu oxi khng hnh thnh bo thoc hnh thnh chm. Lng oxi thng cungcp cho qu trnh ln men l 0,5-0,6m3 mitrng/m3khng kh l tt nht.
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u imKhng c hi cho ngi,gia
sc,mi trng
Khng nh hng n chtlng nng sn
Nhc imB nh hng bi thi tit
Ph tc ng hp
U NHC CA THUC TR SU Bt
Khng tn hi n nhng sinhvt c ch
Hiu qu ko di qua nhiu thh su hi
Hiu qu kinh t cao
Hiu qu ban u khng cao
Tc ng chm (1-3 ngy)
Sn xut phc tp,gi thnh cao
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Bacillus thuringiensisc ng dng ht sc to ln trongvic sn xut cc ch phm tr su sinh hc. Trn th giihin nay, cc loi thuc tr su ha hc ang c xu hngc thay th dn bi cc loi thuc tr su sinh hc. Nhucu bc thit l phi pht trin cc loi thuc bo v thc vt
mi, c tc dng dit su cao hiu lc nhanh chng, khnglm nh hng n mi trng, khng to nn tnh khngthuc ca su hi. V Bacillus thuringiensisl mt trongnhng i tng nghin cu ht sc thun li. Nhng thnh
tu t c ca thuc tr su Bt khng ch mang li nhngli ch r rng m cn ha hn tng lai vi nhiu ng dngmi nhm pht trin nhng bin php c hiu qu hn natrong vic khng ch dch hi.
KT LUN
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Thank You!