Qhov sib txawv tseem ceeb ntawm biotrophic thiab necrotrophic fungi yog tias biotrophic fungi muab cov as-ham los ntawm cov nroj tsuag muaj sia, tswj kev muaj peev xwm ntawm cov tswv tsev, thaum necrotrophic fungi tua lawv cov ntaub so ntswg thiab muab cov khoom noj los ntawm cov ntaub so ntswg tuag.
Muaj ntau hom kab mob fungal, xws li biotrophic, necrotrophic thiab hemibiotrophic, thiab lwm yam, raws li lawv txoj kev ua neej thiab kev cuam tshuam nrog tus tswv tsev. Biotrophic fungi tau txais cov as-ham los ntawm cov nroj tsuag muaj sia nyob. Lawv tsis tua cov ntaub so ntswg. Hauv qhov sib piv, necrotrophic fungi sai tua cov ntaub so ntswg thiab muab cov as-ham los ntawm cov hlwb tuag. Biotrophic fungi muaj qhov nqaim nqaim vim lawv yog cov kab mob tshwj xeeb. Necrotrophic fungi yog opportunistic lossis unspecialized pathogens. Li no, lawv muaj ntau tus tswv tsev.
Dab tsi yog Biotrophic Fungi?
Biotrophic fungi yog ib pawg tshwj xeeb ntawm cov nroj tsuag kab mob fungi. Lawv xav tau cov ntaub so ntswg nyob kom tau txais cov as-ham. Lawv tsis tua cov tswv tsev; es tsis txhob, lawv tswj cov viability ntawm host cells, ua rau me ntsis kev puas tsuaj. Yog li ntawd, cov kab mob biotrophic no tsim kom muaj kev sib raug zoo rau kev noj zaub mov ntev nrog cov nroj tsuag es tsis tua cov hlwb. Cov kab mob fungal mycelia loj hlob ntawm cov nroj tsuag thiab tsim cov khoom noj khoom haus-absorbing hu ua haustoria.
Daim duab 01: Kab mob xeb
Xeb fungi yog ib qho piv txwv zoo tshaj plaws ntawm biotrophic fungi. Powdery mildew fungi yog lwm qhov piv txwv ntawm biotrophic fungi. Biotrophic fungi txo qhov muaj peev xwm sib tw ntawm tus tswv tsev cog. Ntxiv mus, lawv tuaj yeem ua rau poob nyiaj txiag loj rau cov qoob loo cog qoob loo. Powdery mildew, pob kws smut, lws suav nplooj pwm, qia dub xeb ntawm cereals thiab qos yaj ywm lig blight yog ob peb kab mob tshwm sim los ntawm biotrophic fungi.
Necrotrophic Fungi yog dab tsi?
Necrotrophic fungi yog ib pab pawg ntawm opportunistic lossis tsis tshwj xeeb cov kab mob fungi. Lawv ntxeem tau thiab tua cov tswv tsev, tshwj xeeb tshaj yog cov cog cell, sai heev. Tom qab ntawd lawv muab cov khoom noj los ntawm cov ntaub so ntswg tuag saprotrophically. Feem ntau, necrotrophic fungi tsis tsim haustoria lossis appressoria. Nws muaj ntau hom kab mob rau cov kab mob necrotrophic. Feem ntau, lawv tua cov nroj tsuag tsis muaj zog, hluas thiab puas. Lawv nkag mus rau cov nroj tsuag ntawm cov kab mob thiab cov ntaub so ntswg puas. Tom qab ntawd lawv secrete copious cell-wall-degrading (lytic) enzymes thiab co toxins los tua hlwb.
Daim duab 02: Grey Mould
Pythium thiab Fusarium yog ob qho piv txwv ntawm cov kab mob necrotrophic. Grey pwm, pob kws nplooj blight, damping tawm nyob rau hauv seedlings, Dutch elm kab mob, vascular wilt thiab mos rot yog ob peb kab mob tshwm sim los ntawm necrotrophic fungi.
Dab tsi zoo sib xws ntawm Biotrophic thiab Necrotrophic Fungi?
- Biotrophic thiab necrotrophic fungi yog ob hom nroj tsuag pathogenic fungi.
- Lawv muab cov khoom noj los ntawm cov nroj tsuag.
- Ntxiv mus, lawv loj hlob intercellularly ntawm cov tswv tsev.
- Lawv ua rau kev poob nyiaj txiag ntawm cov qoob loo.
Qhov txawv ntawm Biotrophic thiab Necrotrophic Fungi yog dab tsi?
Biotrophic fungi tau txais cov as-ham los ntawm cov nroj tsuag muaj sia, thaum necrotrophic fungi tua cov nroj tsuag thiab tau txais cov as-ham los ntawm cov ntaub so ntswg tuag. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm biotrophic thiab necrotrophic fungi. Tsis tas li ntawd, biotrophic fungi feem ntau tsis tua cov tswv tsev. Lawv ua rau me ntsis kev puas tsuaj. Tab sis, necrotrophic fungi secrete cell phab ntsa degrading enzymes thiab toxins los tua cov tswv tsev sai sai. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm biotrophic thiab necrotrophic fungi.
Cov hauv qab no infographic teev ntau qhov sib txawv ntawm biotrophic thiab necrotrophic fungi nyob rau hauv daim ntawv tabular.
Summary – Biotrophic vs Necrotrophic Fungi
Biotrophic fungi tsis tua cov nroj tsuag cov kab mob. Lawv loj hlob ntawm cov hlwb thiab tau txais cov as-ham los ntawm cov hlwb muaj sia. Nyob rau hauv sib piv, necrotrophic fungi sai tua cov nroj tsuag host cells thiab ces nyob ntawm cov ntaub so ntswg tuag tau txais cov as-ham. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm biotrophic thiab necrotrophic fungi. Biotrophic fungi tsim haustoria thiaj li nqus cov as-ham, thaum necrotrophic fungi tsis tsim haustoria. Ntxiv mus, biotrophic fungi yog cov kab mob tshwj xeeb, thaum necrotrophic fungi yog opportunistic lossis unspecialized pathogens.
