II, Hi~u qua cua chitosan chie'u x~ Ii~u 200 kGy tren cay hoa cuc
3. Xac d!nh dl(QC dQc tinll vanadium va lac dl,lng giai dQc kim lo~i n~ng ella chilosan cbieu x~.
chilosan cbieu x~.
• Qua thi nghi~m da chUng to vanadium la nguyen to' gay di)c cho thuc vat. N5ng di) V (Ic che' 50% sinh tnldng cayIa 2,5 mg/I. N5ng di) V lil' 5-100 mg/I (Ic che' hoan toan phal sinh r~ do d6 diin de'n (Ic che' sinh lnldng cay. N5ng di) gay Che'l hoan loan 100 mg/I.
• E>qc tinh vanadium c6 lh€ dl(qC lo~i lru khi xli' ly chitosan chieu x~
200 kGy. Til' n5ng di) 5 mgll da b~tdiiu c6 liic dung. Cay c6 xli 19 vanadium viin phat lriii'n blnh thuang nbu cay tren m6i lI'uang dU<;fc xli 19 chitosan chie'u x~ li~u 200 kGy va hoan loan kh6ng c6 bi&u hien nhil~mdQc.
Trang nghien cuu Clla mInh, chung l6i chi mdi nghien dIu anh hudng cua chilosan chie'u xa len sinh tnldng cay ma chua nghien cuu lac dung ke'l hdp cua chilosan chie'u xa vii phylohormon. Chung l6i chi mdi xac dinh di)c Hnh vanadium dlta lI'en cac lhay d6i hlnh thai vii lit d Mu thltC hien trang di~u kienin vitro. Do d6, hlldng nghien c(lu lie'p lheo chung t6i M ra Iii:
I. V~ tac du ng cua chitosan chie'u xa Ien tai sinh cay:
TIm hi€u tac d.... ng ket hqp giUa chitosan chieu x,-, va cae IO'.li
phytohormon vdi cac n5ng d6 khac nhau len kha nang tai sinh cay trong
dieu kj~n in vitro.
2. V~ lac dung cua chilosan chie'u xa len tang lI'udng thltC vat:
Khao Sal tac dllng ctla chilosan chie'u xa len lang lnldng thuc Val ngoai d5ng "'i)ng va XLI 19b~ng cac phlldng phap khac nhau: llldi g6c, phun qua la, V.V.
3. V6 anh hudng ctla vanadium Ien sinh Wdng va phal triii'n thuc vat: Nghien cuu tim hi&u ludng tac ctla vanadium Ion qua lrlnh sinh ttlng b<;fp d thuc val, nhit D A va cach~enzyme t6ng h<;fp, dacbi~tla cac le' baa r~ trong qua trlnh phan chiao
Plu1n ke'tlu(m 70
4. V~ kba nang hilp thu kim loai nang cua chitosan chie'u xa:
gbien cllu lim hi€u anh hlldng Clla cae ye'u to' ben ngoai nhll pH,nhi~l di?, kicb lhlldc ion, n6ng di? ion cung nhll lIang JlI<;fng phon ttl' len kha
nanghapthu kim lo~icua chitosan chieu x~.
5. ghien cllu tim ra Joai lhllcV~llhichhap c6 kba nang sinh t6n lIong m6i lrllOng nhi~m vanadium giai guye't viln de stl' dt.lng dilt da nhi~m
vanadium va vand6gom tlJchatthaikim IO'.li n~ng.
Taili~uthwn khdo