noun Botany. cog pigment uas cuam tshuam nrog kev nqus ntawm lub teeb hauv cov lus teb photoperiodic thiab uas tuaj yeem tswj hwm ntau hom kev loj hlob thiab kev loj hlob.
phytochromes txhais li cas?
Phytochromes yog chav kawm ntawm photoreceptor hauv cov nroj tsuag, kab mob thiab fungi siv los ntes lub teeb. Lawv yog cov rhiab heev rau lub teeb nyob rau hauv lub liab thiab deb-liab cheeb tsam ntawm lub pom spectrum thiab muaj peev xwm muab faib ua hom I, uas yog qhib los ntawm deb-liab teeb, los yog hom II uas yog qhib los ntawm lub teeb liab.
Dab tsi yog ob hom phytochrome?
Phytochrome muaj nyob rau hauv ob daim ntawv hloov pauv
Cov ntaub ntawv muaj npe los ntawm cov xim ntawm lub teeb uas lawv nqus tau ntau tshaj: Pr yog daim ntawv xiav uas nqus lub teeb liab (660 nm) thiab Pfr yog daim ntawv xiav-ntsuab uas absorbs deb-liab teeb (730 nm).
Leej twg coined lo lus phytochrome?
Note: Lub sij hawm phytochrome tau qhia los ntawm tus neeg Asmeskas botanist Harry A. Borthwick (1898-1974) thiab biochemist Sterling B. Hendricks (1902-81) xyoo 1960, pom meej thawj zaug hauv ib tsab xov xwm coauthored nrog S.
PFR thiab PR yog dab tsi?
raug rau lub teeb liab hloov cov chromoprotein mus rau ua haujlwm, active daim ntawv (Pfr), thaum tsaus ntuj lossis raug rau lub teeb liab liab hloov chromophore mus rau hauv daim ntawv tsis muaj zog (Pr).
