Ultraviolet hluav taws xob ua rau cov nroj tsuag nplooj, inhibits hypocotyl elongation, thiaj li photosynthesis thiab productivity, thiab ua rau nroj tsuag susceptible pathogen nres, tab sis yuav induce flavonoid synthesis thiab cov kws muaj txuj ci mechanisms. UV-B tuaj yeem txo cov ntsiab lus ntawm ascorbic acid thiab β-carotene, tab sis tuaj yeem pab txhawb anthocyanin synthesis. UV-B hluav taws xob tau tshwm sim nyob rau hauv ib lub lag luam ntsev phenotype, me me, tuab nplooj, luv luv petiole, nce axillary ceg, thiab cov cag pwm / crown piv.
Cov txiaj ntsig ntawm kev tshawb nrhiav ntawm 16 txhiab cultivars los ntawm 7 thaj chaw txawv tebchaws ntawm Tuam Tshoj, Is Nrias teb, Philippines, Nepal, Thaib, Nyab Laj thiab Sri Lanka hauv lub tsev cog khoom tsom tias qhov sib ntxiv ntawm UV-B ua rau kev nce hauv tag nrho cov paj ntoos. Cultivars (tsuas yog ib qho ntawm qhov chaw mus txog theem Sri Lanka), 12 cultivars (cov uas 6 yog qhov tseem ceeb), thiab cov neeg uas muaj UV-B rhiab raug txo qis hauv thaj chaw thiab cov tiller loj. Muaj 6 cultivars nrog cov chlorophyll cov ntsiab lus (2 ntawm cov uas mus txog theem ntawm theem); 5 cultivars nrog cov txo nplooj cov duab photosththetic, thiab 1 cultivar nrog ho zoo (tag nrho cov biomass tseem ceeb tseem) nce).
Qhov piv ntawm UV-B / PAR yog ib qho tseem ceeb ntawm cov lus cog teb rau UV-B. Piv txwv li, UV-B thiab PAR ua ke cuam tshuam rau qhov morphology thiab roj tawm ntawm mint, uas yuav tsum tau muaj ntau theem ntawm lub teeb ci ntsa iab unfiltered.
Nws yuav tsum raug sau tseg tias kev kuaj kev tshawb nrhiav UV-B, txawm tias tseem ceeb hauv kev paub txog cov yam tseem ceeb thiab lwm yam kev mob, cov kev mob ntawm lub cev, vim yog kev siv ntau dua UV-B ntau, tsis muaj UV-A thiab feem ntau tsis pom yav tom ntej PAR, kev tshwm sim feem ntau tsis mechanically extrapolated rau hauv qhov chaw ib puag ncig. Cov kev tshawb fawb sab nraud feem ntau siv UV teeb los nce lossis siv cov ntxaij lim dej kom txo cov qib UV-B.